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| 1.
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Kobayashi, Mio ; Kakuda, Yuko ; Harada, Kenichi ; Sato, Yasunori ; Sasaki, Motoko ; Ikeda, Hiroko ; Terada, Mitsuhiro ; Mukai, Munenori ; Kaneko, Shuichi ; Nakanuma, Yasuni ; 小林, 水緒 ; 原田, 憲一 ; 佐藤, 保則 ; 佐々木, 素子 ; 池田, 博子 ; 金子, 周一 ; 中沼, 安二
概要:
金沢大学医薬保健研究域医学系<br />AIM: To investigate histological and immunohistochemical differences in hepatitis between autoimmune
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hepatitis (AIH) and primary biliary cirrhosis (PBC) with AIH features. METHODS: Liver needle biopsies of 41 PBC with AIH features and 43 AIH patients were examined. The activity of periportal and lobular inflammation was scored 0 (none or minimal activity) to 4 (severe), and the degree of hepatitic rosette formation and emperipolesis was semiquantatively scored 0-3. The infiltration of mononuclear cells positive for CD20, CD38, CD3, CD4, and CD8 and positive for immunoglobulins (IgG, IgM, and IgA) at the periportal areas (interface hepatitis) and in the hepatic lobules (lobular hepatitis) were semiquantitatively scored in immunostained liver sections (score 0-6). Serum aspartate aminotransferase (AST), immunoglobulins, and autoantibodies at the time of liver biopsy were correlated with the histological and immunohistochemical scores of individual lesions. RESULTS: Lobular hepatitis, hepatitic rosette formation, and emperipolesis were more extensive and frequent in AIH than in PBC. CD3+, CD4+, and CD8+ cell infiltration scores were higher in the hepatic lobules and at the interface in AIH but were also found in PBC. The degree of mononuclear cell infiltration correlated well with the degree of interface and lobular hepatitis in PBC, but to a lesser degree in AIH. CD20+ cells were mainly found in the portal tracts and, occasionally, at the interface in both diseases. Elevated AST correlated well with the hepatocyte necroinflammation and mononuclear cell infiltration, specifically CD38+ cells in PBC. No correlation existed between autoantibodies and inflammatory cell infiltration in PBC or AIH. While most AIH cases were IgG-predominant at the interface, PBC cases were divided into IgM-predominant, IgM/IgGequal, and IgG-predominant types, with the latter sharing several features with AIH. CONCLUSION: These results suggest that the hepatocellular injuries associated with interface and lobular hepatitis in AIH and PBC with interface hepatitis may not be identical. © 2014 Baishideng Publishing Group Co., Limited. All rights reserved.
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| 2.
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Xu, Liang ; Nagata, Naoto ; Nagashimada, Mayumi ; Zhuge, Fen ; Ni, Yinhua ; Chen, Guanliang ; Mayoux, Eric ; Kaneko, Shuichi ; Ota, Tsuguhito ; 長田, 直人 ; 金子, 周一 ; 太田, 嗣人
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金沢大学医薬保健研究域医学系<br />Sodium-glucose cotransporter (SGLT) 2 inhibitors increase urinary glucose excretion (UGE), leading t
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o blood glucose reductions and weight loss. However, the impacts of SGLT2 inhibition on energy homeostasis and obesity-induced insulin resistance are less well known. Here, we show that empagliflozin, a SGLT2 inhibitor, enhanced energy expenditure and attenuated inflammation and insulin resistance in high-fat-diet-induced obese (DIO) mice. C57BL/6J mice were pair-fed a high-fat diet (HFD) or a HFD with empagliflozin for 16 weeks. Empagliflozin administration increased UGE in the DIO mice, whereas it suppressed HFD-induced weight gain, insulin resistance, and hepatic steatosis. Moreover, empagliflozin shifted energy metabolism towards fat utilization, elevated AMP-activated protein kinase and acetyl-CoA carbolxylase phosphorylation in skeletal muscle, and increased hepatic and plasma fibroblast growth factor 21 levels. Importantly, empagliflozin increased energy expenditure, heat production, and the expression of uncoupling protein 1 in brown fat and in inguinal and epididymal white adipose tissue (WAT). Furthermore, empagliflozin reduced M1-polarized macrophage accumulation while inducing the anti-inflammatory M2 phenotype of macrophages within WAT and liver, lowering plasma TNFα levels and attenuating obesity-related chronic inflammation. Thus, empagliflozin suppressed weight gain by enhancing fat utilization and browning and attenuated obesity-induced inflammation and insulin resistance by polarizing M2 macrophages in WAT and liver.
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| 3.
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Xu, Liang ; Nagata, Naoto ; Nagashimada, Mayumi ; Zhuge, Fen ; Ni, Yinhua ; Chen, Guanliang ; Kamei, Junzo ; Ishikawa, Hiroki ; Komatsu, Yasuhiko ; Kaneko, Shuichi ; Ota, Tsuguhito ; 長田, 直人 ; 金子, 周一 ; 太田, 嗣人
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金沢大学医薬保健研究域医学系<br />Nonalcoholic fatty liver disease (NAFLD) is caused by ectopic fat accumulation in the liver. NAFLD i
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s associated with hepatic inflammation and oxidative stress, resulting in nonalcoholic steatohepatitis (NASH) with advanced fibrosis. Placental extracts have been used to treat various chronic diseases due to their antioxidative effect. However, the effects of the extracts on the development of NASH have yet to be elucidated. Here, we demonstrated that supplementation with an oral porcine placental extract (PPE) attenuated lipid accumulation and peroxidation, insulin resistance, inflammatory and stress signaling, and fibrogenesis in the liver of NASH model mice fed a high-cholesterol and high-fat diet. The PPE reduced the number of M1-like liver macrophages, but increased the number of anti-inflammatory M2-like macrophages, resulting in a predominance of M2 over M1 macrophage populations in the liver of NASH mice. Accordingly, the PPE suppressed lipopolysaccharide-induced M1 polarization in isolated murine peritoneal macrophages, whereas it facilitated interleukin 4-induced M2 polarization. Furthermore, the PPE reduced the hepatic stellate cell (HSC) activation associated with the attenuated transforming growth factor-β/Smad3 signaling, both in the liver of NASH mice and in RI-T cells, a HSC line. The PPE may be a potential approach to prevent NASH by limiting lipid peroxidation, promoting M2 macrophage polarization, and attenuating HSC activation. © Xu et al.
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Nasti, Alessandro ; Sakai, Yoshio ; Seki, Akihiro ; Buffa, Geraldine Belen ; Komura, Takuya ; Mochida, Hatsune ; Yamato, Masatoshi ; Yoshida, Keiko ; Ho, Tuyen T. B. ; Takamura, Masayuki ; Usui, Soichiro ; Wada, Takashi ; Honda, Masao ; Kaneko, Shuichi ; 酒井, 佳夫 ; 餅田, 初音 ; 吉田, 佳子 ; 高村, 雅之 ; 薄井, 荘一郎 ; 和田, 隆志 ; 本多, 政夫 ; 金子, 周一
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金沢大学医薬保健研究域医学系<br />Stromal cells in adipose tissue are useful for repair/regenerative therapy as they harbor a substant
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ial number of mesenchymal stem cells; therefore, freshly isolated autologous uncultured adipose tissue derived stromal cells (u-ADSCs) are useful for regenerative therapy, and obviate the need for mesenchymal stem cells. We evaluated the therapeutic effect of murine u-ADSCs and sorted subsets of u-ADSCs in a concanavalin A (ConA) induced murine model of hepatitis, as well as their characteristics. We found that 10–20% of u-ADSCs expressed the CD45 leukocyte-related antigen. CD68, which is a marker of macrophages (MΦs), was expressed by 50% of CD45+ u-ADSCs. About 90% of CD68+CD45+ cells expressed CD206 antigen, which is a marker of inhibitory M2-type MΦs. Genes related to M2-type MUs were especially more highly expressed by CD45+CD206+ u-ADSCs than by CD45− u-ADSCs. CD45+ u-ADSCs inhibited the expression of cytokines/chemokines and suppressed the proliferation of splenocytes stimulated with ConA. We observed that not only whole u-ADSCs, but also the CD45+ subset of u-ADSCs ameliorated the ConA-induced hepatitis in mice. In conclusion, we show that freshly isolated murine u-ADSCs were effective against acute hepatitis, and CD45+ u-ADSCs acting phenotypically and functionally like M2-type MΦs, contributed to the repair of liver tissue undergoing inflammation. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim<br />Embargo Period 12 months
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| 5.
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Hayashi, Tomoyuki ; Yamashita, Taro ; Terashima, Takeshi ; Suda, Tsuyoshi ; Okada, Hikari ; Asahina, Yoshiro ; Hayashi, Takehiro ; Hara, Yasumasa ; Nio, Kouki ; Sunagozaka, Hajime ; Takatori, Hajime ; Arai, Kuniaki ; Yamashita, Tatsuya ; Mizukoshi, Eishiro ; Honda, Masao ; Kaneko, Shuichi ; 林, 智之 ; 山下, 太郎 ; 寺島, 健志 ; 須田, 烈史 ; 岡田, 光 ; 朝日向, 良朗 ; 丹尾, 幸樹 ; 砂子阪, 肇 ; 鷹取, 元 ; 荒井, 邦明 ; 山下, 竜也 ; 水腰, 英四郎 ; 本多, 政夫 ; 金子, 周一
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金沢大学先進予防医学研究科<br />Background: Sorafenib is a multiple receptor tyrosine kinase inhibitor known to prolong overall survi
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val in patients with advanced hepatocellular carcinoma (HCC). Predicting this drug's survival benefits is challenging because clinical responses are rarely measurable during treatment. In this study, we hypothesized that serum cytokines levels could predict the survival of advanced HCC patients, as sorafenib targets signaling pathways activated in the tumor stromal microenvironment and potentially affects serum cytokine profiles. Methods: Of 143 patients with advanced-stage HCC, 104 who were recruited between 2003 and 2007 received hepatic arterial infusion chemotherapy (HAIC) that mainly targets tumor epithelial cells at S-phase (cohort 1); additionally, 39 recruited between 2010 and 2012 received sorafenib, which primarily targets the stromal vascular endothelial cells. Serum samples were collected and aliquoted prior to the treatment. Serum EGF, bFGF, HGF, IFN-γ, IL-10, IL-12, IL-2, IL-4, IL-5, IL-6, IL-8, IP-10, MIG, PDGF-BB, SCF, SDF1, TGF-β, TGF-α, TNF-α, and VEGF-A were measured via enzyme-linked immunosorbent assays. The Modified Response Evaluation Criteria in Solid Tumors were used to assess tumor responses. Results: The median survival time of HCC patients in cohorts 1 (HAIC-treated) and 2 (sorafenib-treated) were 12.0 and 12.4 months, respectively. Kaplan-Meier analysis revealed no significant survival differences between the 2 groups. Patients who survived more than 2 years after sorafenib treatment exhibited higher serum levels of IL-10, IL-12, TNF-a, IL-8, SDF-1, EGF, PDGF-BB, SCF, and TGF-α. Furthermore, cohort 2 patients with higher serum IL-5 (>12 pg/mL), IL-8 (>10 pg/mL), PDGF-BB (>300 pg/mL), and VEGF-A (>50 pg/mL) levels achieved longer survival; cohort 1 patients did not. Hierarchical cluster analysis of 6 cytokines robustly enriched for comparison analysis between cohorts 1 and 2 (IL-5, IL-8, TGF-α, PDGF-BB, CXCL9, and VEGF-A) revealed that elevation of these cytokines correlated with better survival when treated with sorafenib but not with HAIC. Conclusions: Patients who exhibited survival benefits owing to sorafenib treatment tended to present higher serum cytokines levels, potentially reflecting the activation of stromal signaling in the tumor microenvironment. Our study thus introduces novel biomarkers that may identify advanced HCC patients who may experience survival benefits with sorafenib treatment. © 2017 The Author(s).
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| 6.
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Hara, Akinori ; Furuichi, Kengo ; Koshino, Akihiko ; Yasuda, Haruka ; Tran, Trang Thi Thu ; Iwata, Yasunori ; Sakai, Norihiko ; Shimizu, Miho ; Kaneko, Shuichi ; Nakamura, Hiroyuki ; Wada, Takashi ; 原, 章規 ; 古市, 賢吾 ; 岩田, 恭宜 ; 坂井, 宣彦 ; 清水, 美保 ; 金子, 周一 ; 中村, 裕之 ; 和田, 隆志
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金沢大学医薬保健研究域医学系<br />Introduction: We examined the impact of autoantibodies on the erythropoietin receptor (EPOR) in type
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2 diabetic patients with chronic kidney disease (CKD). Methods: A total of 112 Japanese patients with type 2 diabetes who had CKD were enrolled in this study and followed for a mean of 45 months. Sera from these patients were screened for anti-EPOR antibodies using enzyme-linked immunosorbent assays. Results: Anti-EPOR antibodies were detected in 26 patients (23%). Anti-EPOR antibodies were associated with low hemoglobin concentrations and decreased renal function. In patients with biopsy-proven diabetic nephropathy, anti-EPOR antibodies were associated with increased levels of interstitial inflammation. A decrease in renal function was observed more frequently in patients with antibodies than in those without antibodies, and the presence of the antibodies together with well-known clinical parameters, including proteinuria and low glomerular filtration rate, was a significant risk factor for end-stage renal disease. In human tubular epithelial HK-2 cells, IgG fractions containing anti-EPOR antibodies upregulated the expression of monocyte chemoattractant protein-1 mRNA under a high concentration of glucose. Conclusion: Anti-EPOR antibodies might be involved in the progression of renal lesions and in the impaired erythropoiesis in type 2 diabetic patients with CKD. Furthermore, the presence of anti-EPOR antibodies may be an additional predictor for end-stage renal disease in type 2 diabetes. © 2017 International Society of Nephrology<br />Embargo Period 12 months
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| 7.
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石田, 晃介 ; 島上, 哲朗 ; 金子, 周一 ; Ishida, Kosuke ; Shimakami, Tetsuro ; Kaneko, Shuichi
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Aim: Antiviral treatment for hepatitis C infection in elderly patients has been dramatically improved by direct-acting a
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ntivirals (DAAs). DAAs are easy to use as they are administered orally and the treatment periods are shorter. Furthermore, they are associated with fewer adverse effects. In this study, we sought to analyze the efficacy and safety of DAAs in HCV-infected elderly patients.Method: We analyzed 223 HCV-infected patients who were treated with DAAs in Kanazawa University Hospital, Japan. As of August 31, 2016, all of the patients were observed to have achieved a sustained viral response by the 12th week of treatment (SVR12). We categorized patients into two groups. Group one included 79 patients (average age 75.5 years; range 70-85 years). Group two included 144 patients (average age, 58.1 years; range 27-69 years). Group one included more female patients.Results: The platelet count of Group one was significantly lower than that of Group two. The FIB-4 index of Group one was significantly higher than that of Group two. Group one included a greater number of patients with a history of hepatocellular carcinoma (HCC) before the administration of DAAs. The SVR12 rate and rate of drop-out due to adverse effects did not differ between the two groups to a statistically significant extent. The rate of HCC occurrence after SVR in Group one was higher than that in Group two.Conclusion: Our study shows that DAAs can be used for older patients and that the antiviral efficacy and safety are similar to the efficacy and safety in younger patients.<br />目的：C型慢性肝疾患に対する抗ウイルス療法は，直接作用型抗ウイルス薬（以下DAA）の登場で高率にウイルス駆除が可能となった．今回，当院においてDAAによる抗ウイルス療法を施行したC型慢性肝疾患症例を対象として，高齢者に対するDAAの有効性，安全性を検討した．方法：金沢大学附属病院においてDAAを導入したC型慢性肝疾患症例のうち，2016年8月までに治療終了後12週間目の持続的ウイルス学的著効（Sustained Viral Response at week 12 after treatment is completed：SVR12）の判定が可能であった223例を対象とした．治療開始時の年齢が70歳以上を高齢群，70歳未満を若年群として両群の臨床背景，抗ウイルス効果，有害事象を解析した．結果：全223例中，高齢群は79例，若年群は144例であった．年齢は高齢群で75.5±4.4歳，若年群で58.1±9.8歳（平均±SD），最年長は85歳，最年少は27歳であった．性別は高齢群で有意に女性が多かった（p＜0.01）．血小板数は高齢群で13.7±6.4×104/μl，若年群で15.9±7.0×104/μl と有意に高齢群で低値であり（p=0.02），FIB-4 Indexも高齢群で5.12±3.25，若年群で3.48±2.89と有意に高齢群が高値であった（p＜0.01）．肝癌既往歴を有する症例は，高齢群で79例中39例，若年群で144例中29例であり，高齢群で有意に多かった（p＜0.01）．血清AFP値は高齢群で12.5±20.3 ng/ml，若年群で15.7±22.3 ng/mlと有意差は認めなかった．DAA導入前の前治療は高齢群で79例中49例，若年群で144例中63例に治療歴があり，高齢群で有意に前治療歴を有する症例が多かった（p=0.01）．治療効果は高齢群が79例中71例（89.9%），若年群が144例中131例（91.0%）でSVR12を達成しており，有意差は認めなかった．副作用中止は高齢群で79例中4例（5.1%），若年群で144例中4例（2.8%）に認めたが，有意差は認めなかった．SVR12達成後の肝発癌は高齢群で79例中17例，若年群で144例中12例に認め，有意に高齢群で多かった（p＜0.01）．結論：DAAの治療効果，副作用は両群間に差を認めず，高齢者においても安全に治療可能であった．しかし，高齢群では肝線維化進展例，肝癌治療歴を有する症例が多く，ウイルス駆除後の発癌に留意すべきである．<br />出版者の許可を得て登録
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| 8.
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Iwata, Yasunori ; Wada, Takashi ; Yokoyama, Hitoshi ; Toyama, Tadashi ; Kitajima, Shinji ; Okumura, Toshiya ; Hara, Akinori ; Yamahana, Junya ; Nakaya, Izaya ; Kobayashi, Motoo ; Kitagawa, Kiyoki ; Kokubo, Satoshi ; Yoshimoto, Keiichi ; Shimizu, Kazuaki ; Sakai, Norihiko ; Furuichi, Kengo ; Koshino, Yoshitaka ; Takaeda, Chikako ; Takeda, Shinichi ; Takasawa, Kazuya ; Ohta, Satoshi ; Takaeda, Masayoshi ; Kaneko, Shuichi
概要:
金沢大学保健管理センター<br />金沢大学大学院医学系研究科<br />金沢大学附属病院<br />Background: In hemodialysis patients, adynamic bone disease has been
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reported to be closely associated with low levels of parathyroid hormone (PTH) due to exposure to high levels of serum calcium following the administration of calcium carbonate (CaCO3) or vitamin D agents. This study was conducted to clarify the therapeutic effect of a non-calcemic phosphate binder, sevelamer hydrochloride (sevelamer), for hypoparathyroidism in hemodialysis patients with or without diabetes mellitus. Methods: Based on entry criteria, 40 Japanese chronic hemodialysis patients (22 males and 18 females with a mean age of 60.6, 14 diabetic patients and 26 non-diabetic patients) were switched from CaCO3 to sevelamer for 48 weeks. Serum calcium, phosphate, intact (i) PTH and PTH-(1-84) were analyzed. Bone remodeling activity was evaluated by determining intact osteocalcine (iOC), bone-specific alkaline phosphatase (BAP). Results: The switch from CaCO3 to sevelamer significantly decreased the serum levels of calcium, resulting in the elevation of iPTH levels from 31±18 pg/mL to 95±96 pg/mL by 48 weeks. In contrast, serum phosphate levels remained similar to those in patients with CaCO3 treatment. Concomitantly, the levels of BAP and iOC were elevated. Further, these beneficial effects on bone turnover were observed in both diabetic and non-diabetic patients. Conclusion: Sevelamer reduced the calcium concentration and thereby increased PTH levels, resulting in the improvement of markers of bone turnover. The administration of sevelamer is of therapeutic benefit for the improvement of bone remodeling activity even in hemodialysis patients with diabetes. © 2007 The Japanese Society of Internal Medicine.
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Misu, Hirofumi ; Takamura, Toshinari ; Takayama, Hiroaki ; Hayashi, Hiroto ; Matsuzawa-Nagata, Naoto ; Kurita, Seiichiro ; Ishikura, Kazuhide ; Ando, Hitoshi ; Takeshita, Yumie ; Ota, Tsuguhito ; Sakurai, Masaru ; Yamashita, Tatsuya ; Mizukoshi, Eishiro ; Yamashita, Taro ; Honda, Masao ; Miyamoto, Kenichi ; Kubota, Tetsuya ; Kubota, Naoto ; Kadowaki, Takashi ; Kim, Han-Jong ; Lee, In-kyu ; Minokoshi, Yasuhiko ; Saito, Yoshiro ; Takahashi, Kazuhiko ; Yamada, Yoshihiro ; Takakura, Nobuyuki ; Kaneko, Shuichi
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金沢大学医薬保健研究域医学系<br />The liver may regulate glucose homeostasis by modulating the sensitivity/resistance of peripheral ti
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ssues to insulin, by way of the production of secretory proteins, termed hepatokines. Here, we demonstrate that selenoprotein P (SeP), a liver-derived secretory protein, causes insulin resistance. Using serial analysis of gene expression (SAGE) and DNA chip methods, we found that hepatic SeP mRNA levels correlated with insulin resistance in humans. Administration of purified SeP impaired insulin signaling and dysregulated glucose metabolism in both hepatocytes and myocytes. Conversely, both genetic deletion and RNA interference-mediated knockdown of SeP improved systemic insulin sensitivity and glucose tolerance in mice. The metabolic actions of SeP were mediated, at least partly, by inactivation of adenosine monophosphate-activated protein kinase (AMPK). In summary, these results demonstrate a role of SeP in the regulation of glucose metabolism and insulin sensitivity and suggest that SeP may be a therapeutic target for type 2 diabetes. © 2010 Elsevier Inc.
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Nakamura, Seiji ; Takamura, Toshinari ; Matsuzawa-Nagata, Naoto ; Takayama, Hiroaki ; Misu, Hirofumi ; Noda, Hiroyo ; Nabemoto, Satoko ; Kurita, Seiichiro ; Ota, Tsuguhito ; Ando, Hitoshi ; Miyamoto, Kenichi ; Kaneko, Shuichi
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Visceral adiposity in obesity causes excessive free fatty acid (FFA) flux into the liver via the portal vein and may cau
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se fatty liver disease and hepatic insulin resistance. However, because animal models of insulin resistance induced by lipid infusion or a high fat diet are complex and may be accompanied by alterations not restricted to the liver, it is difficult to determine the contribution of FFAs to hepatic insulin resistance. Therefore, we treated H4IIEC3 cells, a rat hepatocyte cell line, with a monounsaturated fatty acid (oleate) and a saturated fatty acid (palmitate) to investigate the direct and initial effects of FFAs on hepatocytes. We show that palmitate, but not oleate, inhibited insulin-stimulated tyrosine phosphorylation of insulin receptor substrate 2 and serine phosphorylation of Akt, through c-Jun NH2-terminal kinase (JNK) activation. Among the well established stimuli for JNK activation, reactive oxygen species (ROS) played a causal role in palmitate-induced JNK activation. In addition, etomoxir, an inhibitor of carnitine palmitoyltransferase-1, which is the rate-limiting enzyme in mitochondrial fatty acid β-oxidation, as well as inhibitors of the mitochondrial respiratory chain complex (thenoyltrifluoroacetone and carbonyl cyanide m-chlorophenylhydrazone) decreased palmitate-induced ROS production. Together, our findings in hepatocytes indicate that palmitate inhibited insulin signal transduction through JNK activation and that accelerated β-oxidation of palmitate caused excess electron flux in the mitochondrial respiratory chain, resulting in increased ROS generation. Thus, mitochondria-derived ROS induced by palmitate may be major contributors to JNK activation and cellular insulin resistance. © 2009 by The American Society for Biochemistry and Molecular Biology, Inc.
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| 11.
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Saito, Shigeru ; Honda, Masao ; Kaneko, Shuichi ; Horimoto, Katsuhisa
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One of the most characteristic features of biological molecular networks is that the network structure itself changes, d
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epending on the cellular environment. Indeed, activated molecules show a variety of responses to distinctive cell conditions, and subsequently the network structures of active molecules also change. Here we present an approach to trace the network structure changes by using the graphical chain model developed from the gene expression data. The previous procedure for applying the graphical chain model to the expression profiles of a limited number of genes has been improved to analyze the entire set of genes. Furthermore, the chain model has been rearranged according to the association strength, and was scrutinized to identify the candidates of essential gene-gene relationships for the network changes, by using the path consistency algorithm. The improved procedure was applied to the expression profiles of 8,427 genes, which were measured in two distinctive stages of liver cancer progression. As a result, the chain model of the 18 gene cluster relationships with strong associations was inferred, in which the coordination of clusters was described in the cell stage progression, and the gene-gene relationships between known cancer-related genes causing the progression were further refined. Thus, the present procedure is a useful method to model the network structure changes in the cell stage progression, and to clarify the gene candidates for the progression. ©2009 IEEE.
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| 12.
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Kurita, Seiichiro ; Ando, Hitoshi ; Kaneko, Shuichi ; Takamura, Toshinari
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金沢大学医薬保健研究域医学系
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| 13.
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Sakai, Norihiko ; Furuichi, Kengo ; Shinozaki, Yasuyuki ; Yamauchi, Hiroyuki ; Toyama, Tadashi ; Kitajima, Shinji ; Okumura, Toshiya ; Kokubo, Satoshi ; Kobayashi, Motoo ; Takasawa, Kazuya ; Takeda, Shin-ichi ; Yoshimura, Mitsuhiro ; Kaneko, Shuichi ; Wada, Takashi
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金沢大学医薬保健研究域医学系<br />The presence of chronic kidney disease in humans is associated with a risk of kidney function loss a
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s well as the development of cardiovascular disease. Fibrocytes have been shown to contribute to organ fibrosis. In this study, the presence of fibrocytes was investigated immunohistochemically in kidney biopsy specimens from 100 patients with chronic kidney disease. In addition, 6 patients with thin basement membrane disease were studied as a disease control. In patients with chronic kidney disease, the infiltration of fibrocytes was observed mainly in the interstitium. The number of interstitial fibrocytes in patients with chronic kidney disease was higher than that in patients with thin basement membrane disease. The number of infiltrated fibrocytes in the interstitium correlated well with the severity of tubulointerstitial lesions, such as interstitial fibrosis, in patients with chronic kidney disease. In addition, there were significant correlations between the number of interstitial fibrocytes and the number of CD68-positive macrophages in the interstitium as well as urinary monocyte chemoattractant protein-1/CCL2 levels. In particular, there was an inverse correlation between the number of interstitial fibrocytes and kidney function at the time of biopsy. Finally, the numbers of interstitial fibrocytes and macrophages as well as urinary CCL2 levels were significantly decreased during convalescence induced by glucocorticoid therapy. These results suggest that fibrocytes may be involved in the pathogenesis of chronic kidney disease through the interaction with macrophages as well as CCL2. © 2010 Elsevier Inc. All rights reserved.
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| 14.
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Honda, Masao ; Nakamura, Mikiko ; Tateno, Makoto ; Sakai, Akito ; Shimakami, Tetsuro ; Shirasaki, Takayoshi ; Yamashita, Tatsuya ; Arai, Kuniaki ; Yamashita, Taro ; Sakai, Yoshio ; Kaneko, Shuichi
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金沢大学医薬保健研究域医学系<br />Background & Aims: The mechanisms of treatment resistance to interferon (IFN) and ribavirin (Rib) co
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mbination therapy for hepatitis C virus (HCV) infection are not known. This study aims to gain insight into these mechanisms by exploring hepatic gene expression before and during treatment. Methods: Liver biopsy was performed in 50 patients before therapy and repeated in 30 of them 1 week after initiating combination therapy. The cells in liver lobules (CLL) and the cells in portal areas (CPA) were obtained from 12 patients using laser capture microdissection (LCM). Results: Forty-three patients were infected with genotype 1 HCV, 20 of who were viral responders (genotype 1-Rsp) with treatment outcome of SVR or TR, while 23 were non-responders (genotype 1-nonRsp) with NR. Only seven patients were infected with genotype 2. Before treatment, the expression of IFN and Rib-stimulated genes (IRSGs), apoptosis-associated genes, and immune reaction gene pathways was greater in genotype 1-nonRsp than in Rsp. During treatment, IRSGs were induced in genotype 1-Rsp, but not in nonRsp. IRSG induction was irrelevant in genotype 2-Rsp and was mainly impaired in CLL but not in CPA. Pathway analysis revealed that many immune regulatory pathways were induced in CLL from genotype 1-Rsp, while growth factors related to angiogenesis and fibrogenesis were more induced in CPA from genotype 1-nonRsp. Conclusions: Impaired IRSGs induction in CLL reduces the sensitivity to treatment for genotype 1 HCV infection. CLL and CPA in the liver might be differentially involved in treatment resistance. These findings could be useful for the improvement of therapy for HCV infection. © 2010 European Association for the Study of the Liver.
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| 15.
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Iida, Noriho ; Nakamoto, Yasunari ; Baba, Tomohisa ; Nakagawa, Hidetoshi ; Mizukoshi, Eishiro ; Naito, Makoto ; Mukaida, Naofumi ; Kaneko, Shuichi
概要:
金沢大学医薬保健研究域医学系<br />Several chemokines are used for immunotherapy against cancers because they can attract immune cells
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such as dendritic and cytotoxic T cells to augment immune responses. Radiofrequency ablation (RFA) is used to locally eliminate cancers such as hepatocellular carcinoma (HCC), renal cell carcinoma, and lung cancer. Because HCC often recurs even after an eradicative treatment with RFA, additional immunotherapy is necessary. We treated tumor-bearing mice by administering ECI301, an active variant of CC chemokine ligand 3, after RFA. Mice were injected s.c. with BNL 1ME A.7R.1, a murine hepatoma cell line, in the bilateral flank. After the tumor became palpable, RFA was done on the tumor of one flank with or without ECI301. RFA alone eliminated the treated ipsilateral tumors and retarded the growth of contralateral non-RFA-treated tumors accompanied by massive T-cell infiltration. Injection of ECI301 augmented RFA-induced antitumor effect against non-RFA-treated tumors when administered to wild-type or CCR5-deficient but not CCR1-deficient mice. ECI301 also increased CCR1-expressing CD11c+ cells in peripheral blood and RFA-treated tumors after RFA. Deficiency of CCR1 impairs accumulation of CD11c+, CD4+, and CD8+ cells in RFA-treated tumors. Furthermore, in IFN-ã-enzyme-linked immunospot assay, ECI301 augmented tumor-specific responses after RFA whereas deficiency of CCR1 abolished this augmentation. Thus, we proved that ECI301 further augments RFA-induced antitumor immune responses in a CCR1-dependent manner. ©2010 AACR.
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| 16.
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Uno, Masafumi ; Kurita, Seiichiro ; Misu, Hirofumi ; Ando, Hitoshi ; Ota, Tsuguhito ; Matsuzawa-Nagata, Naoto ; Kita, Yuki ; Nabemoto, Satoko ; Akahori, Hiroshi ; Zen, Yoh ; Nakanuma, Yasuni ; Kaneko, Shuichi ; Takamura, Toshinari
概要:
金沢大学医薬保健研究域医学系<br />Nonalcoholic steatohepatitis (NASH) is the progressive form of nonalcoholic fatty liver disease and
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is one of the most common liver diseases in the developed world. The histological findings of NASH are characterized by hepatic steatosis, inflammation, and fibrosis. However, an optimal treatment for NASH has not been established. Tranilast, N-(3′,4′-dimedioxycinnamoyl)- anthranilic acid, is an antifibrogenic agent that inhibits the action of transforming growth factor beta (TGF-β). This drug is used clinically for fibrogenesis-associated skin disorders including hypertrophic scars and scleroderma. TGF-β plays a central role in the development of hepatic fibrosis, and tranilast may thus ameliorate the pathogenesis of NASH. We investigated the effects of tranilast using an established dietary animal model of NASH, obese diabetic Otsuka Long-Evans Tokushima Fatty (OLETF) rats and nondiabetic control Long-Evans Tokushima Otsuka (LETO) rats fed a methionine-deficient and choline-deficient diet. Treatment with 2% tranilast (420 mg/kg/day) for 8 weeks prevented the development of hepatic fibrosis and the activation of stellate cells, and down-regulated the expression of genes for TGF-β and TGF-β-target molecules, including α1 procollagen and plasminogen activator-1. In addition, tranilast attenuated hepatic inflammation and Kupffer cell recruitment, and down-regulated the expression of tumor necrosis factor alpha. Unexpectedly, tranilast ameliorated hepatic steatosis and up-regulated the expression of genes involved in beta-oxidation, such as peroxisome proliferator-activated receptor α and carnitine O-palmitoyltransferase-1. Most of these effects were observed in LETO rats and OLETF rats, which suggest that the action of tranilast is mediated through the insulin resistance-independent pathway. Conclusion: Our findings suggest that targeting TGF-β with tranilast represents a new mode of therapy for NASH. Copyright © 2008 by the American Association for the Study of Liver Diseases.
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| 17.
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Akahori, Hiroshi ; Takeshita, Yumie ; Saito, Reina ; Kaneko, Shuichi ; Takamura, Toshinari
概要:
金沢大学医薬保健研究域医学系<br />Although the etiology of Graves' disease is still not clear, it is generally suggested that environm
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ental factors such as infections contribute to the development of Graves' disease. We report here three cases of Graves' disease which presented simultaneously with infectious mononucleosis due to primary EBV infection. Acute EBV infection might play an important role in the onset of Graves' disease. These three women complained of a sore throat or neck pain, resembling subacute thyroiditis. In the case of thyrotoxicosis accompanied by sore throat or neck pain, Graves' disease must be distinguished from subacute thyroiditis. © 2010 The Japanese Society of Internal Medicine.
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| 18.
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Ando, Hitoshi ; Takamura, Toshinari ; Matsuzawa-Nagata, Naoto ; Shima, Kosuke R. ; Nakamura, Seiji ; Kumazaki, Masafumi ; Kurita, Seiichiro ; Misu, Hirofumi ; Togawa, Naoyuki ; Fukushima, Tatsunobu ; Fujimura, Akio ; Kaneko, Shuichi
概要:
金沢大学医薬保健研究域医学系<br />Recent studies have correlated metabolic diseases, such as metabolic syndrome and non-alcoholic fatt
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y liver disease, with the circadian clock. However, whether such metabolic changes per se affect the circadian clock remains controversial. To address this, we investigated the daily mRNA expression profiles of clock genes in the liver of a dietary mouse model of non-alcoholic steatohepatitis (NASH) using a custom-made, high-precision DNA chip. C57BL/6J mice fed an atherogenic diet for 5 weeks developed hypercholesterolemia, oxidative stress, and NASH. DNA chip analyses revealed that the atherogenic diet had a great influence on the mRNA expression of a wide range of genes linked to mitochondrial energy production, redox regulation, and carbohydrate and lipid metabolism. However, the rhythmic mRNA expression of the clock genes in the liver remained intact. Most of the circadianly expressed genes also showed 24-h rhythmicity. These findings suggest that the biological clock is protected against such a metabolic derangement as NASH. © 2009 Elsevier Inc. All rights reserved.
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| 19.
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Tang, Yaliang ; Masuo, Yusuke ; Sakai, Yoshio ; Wakayama, Tomohiko ; Sugiura, Tomoko ; Harada, Ryuichi ; Futatsugi, Azusa ; Komura, Takuya ; Nakamichi, Noritaka ; Sekiguchi, Hirotaka ; Sutoh, Keita ; Usumi, Koji ; Iseki, Shoichi ; Kaneko, Shuichi ; Kato, Yukio
概要:
Xenobiotic transporters play key roles in disposition of certain therapeutic agents, although limited information is ava
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ilable on their roles other than pharmacokinetic issues. Here, suppressive effect of multispecific organic cation transporter OCTN1/SLC22A4 on liver fibrosis was proposed in liver injury models. After injection of hepatotoxins such as dimethylnitrosamine (DMN) or concanavalin A, hepatic fibrosis, and oxidative stress, evaluated in terms of Sirius red and 4-hydroxy-2-nonenal staining, respectively, were more severe in liver of octn1/slc22a4 gene knockout (octn1-/-) mice than that in wild-type mice. DMN treatment markedly increased α-smooth muscle actin and F4/80, markers of activated stellate and Kupffer cells, respectively, in liver of octn1-/-, but had less effect in wild-type mice. Thus, octn1/slc22a4 gene deletion results in more severe hepatic fibrosis, oxidative stress, and inflammation. DMN-treated wild-type mice showed increased Octn1 staining and hepatic concentration of its food-derived antioxidant ergothioneine (ERGO). The upregulated Octn1 was co-localized with α-smooth muscle actin. Functional expression of Octn1 was demonstrated in activated human hepatic stellate cell lines, LI90 and LX-2. Provision of ERGO-rich feed ameliorated DMN-induced liver fibrosis and oxidative stress. Overall, Octn1 is upregulated in activated stellate cells, resulting in increased delivery of its substrate antioxidant ERGO and a protective effect against liver fibrosis. © 2016 American Pharmacists Association. Published by Elsevier Inc. All rights reserved.<br />Embargo Period 12 months
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| 20.
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Kato, Yukio ; Kubo, Yoshiyuki ; Iwata, Daisuke ; Kato, Sayaka ; Sudo, Tomohisa ; Sugiura, Tomoko ; Kagaya, Takashi ; Wakayama, Tomohiko ; Hirayama, Akiyoshi ; Sugimoto, Masahiro ; Sugihara, Kazushi ; Kaneko, Shuichi ; Soga, Tomoyoshi ; Asano, Masahide ; Tomita, Masaru ; Matsui, Toshiyuki ; Wada, Morimasa ; Tsuji, Akira
概要:
金沢大学医薬保健研究域薬学系<br />Purpose. Solute carrier OCTN1 (SLC22A4) is an orphan transporter, the physiologically important subs
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trate of which is still unidentified. The aim of the present study was to examine physiological roles of OCTN1. Methods. We first constructed octn1 gene knockout (octn1-/-) mice. Metabolome analysis was then performed to identify substrates in vivo. The possible association of the substrate identified with diseased conditions was further examined. Results. The metabolome analysis of blood and several organs indicated complete deficiency of a naturally occurring potent antioxidant ergothioneine in octn1-/- mice among 112 metabolites examined. Pharmacokinetic analyses after oral administration revealed, the highest distribution to small intestines and extensive renal reabsorption of [3H]ergothioneine, both of which were much reduced in octn1-/- mice. The octn1 -/- mice exhibited greater susceptibility to intestinal inflammation under the ischemia and reperfusion model. The blood ergothioneine concentration was also much reduced in Japanese patients with Crohn's disease, compared with healthy volunteers and patients with another inflammatory bowel disease, ulcerative colitis. Conclusions. These results indicate that OCTN1 plays a pivotal role for maintenance of systemic and intestinal exposure of ergothioneine, which could be important for protective effects against intestinal tissue injuries, providing a possible diagnostic tool to distinguish the inflammatory bowel diseases. © 2010 Springer Science+Business Media, LLC.
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| 21.
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Kato, Yukio ; Kubo, Yoshiyuki ; Iwata, Daisuke ; Kato, Sayaka ; Sudo, Tomohisa ; Sugiura, Tomoko ; Kagaya, Takashi ; Wakayama, Tomohiko ; Hirayama, Akiyoshi ; Sugimoto, Masahiro ; Sugihara, Kazushi ; Kaneko, Shuichi ; Soga, Tomoyoshi ; Asano, Masahide ; Tomita, Masaru ; Matsui, Toshiyuki ; Wada, Morimasa ; Tsuji, Akira
概要:
金沢大学医薬保健研究域薬学系<br />Purpose: Solute carrier OCTN1 (SLC22A4) is an orphan transporter, the physiologically important subs
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trate of which is still unidentified. The aim of the present study was to examine physiological roles of OCTN1. Methods: We first constructed octn1 gene knockout (octn1-/-) mice. Metabolome analysis was then performed to identify substrates in vivo. The possible association of the substrate identified with diseased conditions was further examined. Results: The metabolome analysis of blood and several organs indicated complete deficiency of a naturally occurring potent antioxidant ergothioneine in octn1-/- mice among 112 metabolites examined. Pharmacokinetic analyses after oral administration revealed the highest distribution to small intestines and extensive renal reabsorption of [3H]ergothioneine, both of which were much reduced in octn1-/- mice. The octn1-/- mice exhibited greater susceptibility to intestinal inflammation under the ischemia and reperfusion model. The blood ergothioneine concentration was also much reduced in Japanese patients with Crohn's disease, compared with healthy volunteers and patients with another inflammatory bowel disease, ulcerative colitis. Conclusions: These results indicate that OCTN1 plays a pivotal role for maintenance of systemic and intestinal exposure of ergothioneine, which could be important for protective effects against intestinal tissue injuries, providing a possible diagnostic tool to distinguish the inflammatory bowel diseases. © 2010 Springer Science+Business Media, LLC.
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| 22.
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Takamura, Toshinari ; Shimizu, Akiko ; Komura, Takuya ; Ando, Hitoshi ; Zen, Yoh ; Minato, Hiroshi ; Matsushita, Eiki ; Kaneko, Shuichi
概要:
金沢大学大学院医学系研究科環境社会医学<br />A 53-year-old postmenopausal woman, who had a family history of cryptogenic liver cirrhosis, wa
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s diagnosed with osteoporosis, and started on the selective estrogen receptor modulator (SERM) raloxifene 60 mg/day orally. She developed marked liver dysfunction. Her body mass index (BNU) was 26.5. Her blood chemistry indicated AST 342 IU/L, ALT 356 IU/L, and hyaluronic acid 255 ng/mL. An oral glucose tolerance test showed impaired glucose tolerance with marked insulin resistance. Histologically, we diagnosed this case as having pre-cirrhotic nonalcoholic steatohepatitis (NASH). This is the first histologically confirmed case of NASH that was aggravated by raloxifene. © 2007 The Japanese Society of Internal Medicine.
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| 23.
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Koike, Nobuhiko ; Takamura, Toshinari ; Kaneko, Shuichi
概要:
大学院医学系研究科環境社会医学<br />Diabetic nephropathy is a major complication of diabetes leading to end-stage renal disease, which
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requires hemodialysis. Although the mechanism by which it progresses is largely unknown, the role of hyperglycemia-derived oxidative stress has recently been the focus of attention as the cause of diabetic complications. Constituent cells of the renal glomeruli have the capacity to release reactive oxygen species (ROS) upon stimulation of NADPH oxidase activated by protein kinase C (PKC). Hyperglycemia and insulin resistance in the diabetic state are often associated with activation of PKC and tumor necrosis factor (TNF)-α, respectively. The aim of this study is to clarify the signaling pathway leading to ROS production by PKC and TNF-α in rat glomeruli. Isolated rat glomeruli were stimulated with phorbol 12-myristate 13-acetate (PMA) and TNF-α, and the amount of ROS was measured using a chemiluminescence method. Stimulation with PMA (10 ng/ml) generated ROS with a peak value of 136 ± 1.2 cpm/mg protein (mean ± SEM). The PKC inhibitor H-7, the NADPH oxidase inhibitor diphenylene iodonium and the phosphatidylinositol-3 (PI-3) kinase inhibitor wortmannin inhibited PMA-induced ROS production by 100%, 100% and 80%, respectively. In addition, TNF-α stimulated ROS production (283 ± 5.8/mg protein/20 min). The phosphodiesterase inhibitor cilostazol activates protein kinase A and is reported to improve albuminuria in diabetic rats. Cilostazol (100 μg/ml) inhibited PMA, and TNF-α-induced ROS production by 78 ± 1.8, and 19 ± 2.7%, respectively. The effects of cilostazol were not additive with wortmannin. Cilostazol arrests oxidative stress induced by PKC activation by inhibiting the PI-3 kinase-dependent pathway, and may thus prevent the development of diabetic nephropathy. © 2007 Elsevier Inc. All rights reserved.
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| 24.
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Ota, Tsuguhito ; Takamura, Toshinari ; Kaneko, Shuichi
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金沢大学医薬保健研究域医学系
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| 25.
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Oguri, Hikaru ; Urabe, Takeshi ; Ogino, Hidero ; Yanagi, Masayuki ; Matsushita, Eiki ; Inagaki, Yutaka ; Kaneko, Shuichi ; Unoura, Masashi ; Kobayashi, Kenichi
概要:
大学院医学系研究科
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| 26.
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Kitano, Yoshiro ; Urabe, Takeshi ; Koura, Takayoshi ; Ogino, Hidero ; Terasaki, Shuichi ; Kawai, Hiroshi ; Yanagi, Masayuki ; Inagaki, Yutaka ; Kaneko, Shuichi ; Unoura, Masashi ; Kobayashi, Kenichi ; Matsui, Osamu
概要:
金沢大学医学系研究科<br />荻野, 英朗
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| 27.
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Takamura, Toshinari ; Shimizu, Akiko ; Ando, Hitoshi ; Kaneko, Shuichi
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金沢大学大学院医学系研究科環境社会医学
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| 28.
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Sakurai, Masaru ; Takamura, Toshinari ; Ota, Tsuguhito ; Ando, Hitoshi ; Akahori, Hiroshi ; Kaji, Kyosuke ; Sasaki, Motoko ; Nakanuma, Yasuni ; Miura, Katsuyuki ; Kaneko, Shuichi
概要:
金子, 周一<br />金沢大学大学院医学系研究科環境社会医学<br />Background: To address the hypothesis that liver steatosis causes systemic insulin
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resistance, we sought to determine the liver histological feature that most strongly contributes to insulin resistance in patients with nonalcoholic fatty liver disease (NAFLD). Methods: Liver biopsy specimens were obtained from 131 patients with clinically suspected NAFLD. The stage, grade of nonalcoholic steatohepatitis (NASH), and level of steatosis were scored and analyzed in relation to the homeostasis model assessment of insulin resistance (HOMA-IR) and the metabolic clearance rate (MCR), measured using the glucose clamp method. Results: In the univariate analysis, the degree of hepatic steatosis (r = 0.458, P < 0.001), stage (r = 0.360, P < 0.001), and grade (r = 0.349, P < 0.01) of NASH were significantly correlated with the HOMA-IR. Multiple regression analysis adjusting for age, sex, body mass index, and each histological score showed that steatosis was significantly and independently associated with HOMA-IR (coefficient = 1.42, P < 0.001), but not with the stage (coefficient = 0.33, P = 0.307) or grade (coefficient = 0.67, P = 0.134) of NASH. Similar independent relationships were observed between steatosis and MCR, but the relationship was weaker (coefficient = -0.98, P = 0.076). Conclusions: Steatosis of the liver, but not the stage or the grade of NASH, is associated with insulin resistance in patients with NAFLD. © Springer-Verlag Tokyo 2007.
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| 29.
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Otowa, Kanichi ; Takamura, Masayuki ; Murai, Hisayoshi ; Maruyama, Michiro ; Nakano, Manabu ; Ikeda, Tatsunori ; Kobayashi, Daisuke ; Ootsuji, Hiroshi ; Okajima, Masaki ; Furusho, Hiroshi ; Yuasa, Toyoshi ; Takata, Shigeo ; Kaneko, Shuichi
概要:
金沢大学大学院医学系研究科
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| 30.
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Takeshita, Yumie ; Takamura, Toshinari ; Hamaguchi, Erika ; Shimizu, Akiko ; Ota, Tsuguhito ; Sakurai, Masaru ; Kaneko, Shuichi
概要:
金沢大学大学院医学系研究科環境社会医学<br />Plasminogen activator inhibitor 1 (PAI-1) is an important mediator of atherosclerosis and liver
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fibrosis in insulin resistance. Circulating levels of PAI-1 are elevated in obese individuals, and PAI-1 messenger RNA is significantly higher in the livers of obese type 2 diabetic individuals than in nonobese type 2 diabetic individuals. To address the mechanism underlying the up-regulation of hepatic PAI-1 in obesity, we tested the effects of tumor necrosis factor α (TNF-α), an important link between obesity and insulin resistance, on PAI-1 production in the nonmalignant human hepatocyte cell line, THLE-5b. Incubation of THLE-5b cells with TNF-α stimulated PAI-1 production via protein kinase C-, mitogen-activated protein kinase-, protein tyrosine kinase-, and nuclear factor-κB-dependent pathways. A thiazolidinedione, pioglitazone, reduced TNF-α-induced PAI-1 production by 32%, via protein kinase C- and nuclear factor-κB-dependent pathways. The 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitor cerivastatin inhibited TNF-α-induced PAI-1 production by 59%, which was reversed by coincubation with mevalonic acid. In conclusion, obesity and TNF-α up-regulation of PAI-1 expression in human hepatocytes may contribute to the impairment of the fibrinolytic system, leading to the development of atherosclerosis and liver fibrosis in insulin-resistant individuals. A thiazolidinedione and a 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitor may thus be candidate drugs to inhibit obesity-associated hepatic PAI-1 production. © 2006
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| 31.
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Ando, Hitoshi ; Oshima, Yasuo ; Yanagihara, Hayato ; Hayashi, Yohei ; Takamura, Toshinari ; Kaneko, Shuichi ; Fujimura, Akio
概要:
金沢大学大学院医学系研究科環境社会医学<br />Although a number of genes expressed in most tissues, including the liver, exhibit circadian re
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gulation, gene expression profiles are usually examined only at one scheduled time each day. In this study, we investigated the effects of obese diabetes on the hepatic mRNA levels of various genes at 6-h intervals over a single 24-h period. Microarray analysis revealed that many genes are expressed rhythmically, not only in control KK mice but also in obese diabetic KK-Ay mice. Real-time quantitative PCR verified that 19 of 23 putative circadianly expressed genes showed significant 24-h rhythmicity in both strains. However, obese diabetes attenuated these expression rhythms in 10 of 19 genes. More importantly, the effects of obese diabetes were observed throughout the day in only two genes. These results suggest that observation time influences the results of gene expression analyses of genes expressed circadianly. © 2006 Elsevier Inc. All rights reserved.
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| 32.
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Hayakawa, Tetsuo ; Takamura, Toshinari ; Abe, Toshio ; Kaneko, Shuichi
概要:
金沢大学大学院医学系研究科環境社会医学<br />A C825T polymorphism of the gene encoding the G-protein β3 subunit (GNB3) is associated with in
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creased intracellular signal transduction. We know that this C825T polymorphism may influence hypertension and obesity. In whites, the C825T polymorphism has been reported to induce hypertension, obesity, and diabetic nephropathy. Thus, we investigated how genetic variation in the GNB3 gene is associated with hypertension, obesity, insulin resistance, diabetes, diabetic complications, and diabetic therapies in 427 Japanese subjects with type 2 diabetes mellitus and in 368 Japanese subjects who underwent general health examinations. The frequency of the GNB3 gene polymorphism was 0.48 and 0.47 in subjects with diabetes and in those who had general health examinations, respectively. The amount of hyperlipidemia of the CT allele was significantly lower than the amount in the CC allele in the Japanese subjects with diabetes. Our results suggest that the C825T polymorphism influences lipid metabolism and is not associated with hypertension, obesity, insulin resistance, diabetes, diabetic complications, or diabetic therapies. © 2007.
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| 33.
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Terasaki, Shuichi ; Nakanuma, Yasuni ; Unoura, Masashi ; Kaneko, Shuichi ; Kobayashi, Kenichi
概要:
金沢大学医薬保健研究域医学系<br />We examined the histological changes of the peribiliary glands (PBGs), a hitherto pooly recognized a
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natomical element around the biliary tree, in 7 cases of primary sclerosing cholangitis (PSC). These glands showed proliferation, and nonspecific inflammation with lymphoplasmacy ticinfiltration, fibrosis. and destruction. In addition, there were cystic lesions around the bile ducts, and they were considered to reflect dilatation of the PBGs. These changes were found around the intrahepatic and extrahepatic bile ducts in the cases examined. It is of interest that changes in the PBGs tended to correlate with the inflammatory changes of the bile duct wall itself, though 2 cases showed changes in the duct walls and PBGs unrelated to their distribution along the biliary tree. These findings suggest that the PBGs are also a target structure in addition to the bile ducts themselves in PSC.
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| 34.
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Honda, Masao ; Sakai, Yoshio ; Yamashita, Taro ; Yamashita, Tatsuya ; Sakai, Akito ; Mizukoshi, Eishiro ; Nakamoto, Yasunari ; Tatsumi, Isamu ; Miyazaki, Yoshitaka ; Tanno, Hiroshi ; Kaneko, Shuichi ; Hokuriku Liver Study Group
概要:
金沢大学医薬保健研究域医学系<br />To develop a non-invasive and sensitive diagnostic test for cancer using peripheral blood, we evalua
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ted gene expression profiling of blood obtained from patients with cancer of the digestive system and normal subjects. The expression profiles of blood-derived total RNA obtained from 39 cancer patients (11 colon cancer, 14 gastric cancer, and 14 pancreatic cancer) was clearly different from those obtained from 15 normal subjects. By comparing the gene expression profiles of cancer patients and normal subjects, 25 cancer-differentiating genes (p<5.0×10-6 and fold differences >3) were identified and an " expression index" deduced from the expression values of these genes differentiated the validation cohort (11 colon cancer, 8 gastric cancer, 18 pancreatic cancer, and 15 normal subjects) into cancer patients and normal subjects with 100% (37/37) and 87% (13/15) accuracy, respectively. Although, the expression profiles were not clearly different between the cancer patients, some characteristic genes were identified according to the stage and species of the cancer. Interestingly, many immune-related genes such as antigen presenting, cell cycle accelerating, and apoptosis- and stress-inducing genes were up-regulated in cancer patients, reflecting the active turnover of immune regulatory cells in cancer patients. These results showed the potential relevance of peripheral blood gene expression profiling for the development of new diagnostic examination tools for cancer patients. © 2010 Elsevier Inc.
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| 35.
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Tatsumi, Yasuaki ; Hattori, Ai ; Hayashi, Hisao ; Ikoma, Jiro ; Kaito, Masahiko ; Imoto, Masami ; Wakusawa, Shinya ; Yano, Motoyoshi ; Hayashi, Kazuhiko ; Katano, Yoshiaki ; Goto, Hidemi ; Okada, Toshihide ; Kaneko, Shuichi
概要:
金沢大学医薬保健研究域医学系<br />Objective This study evaluated the current state of patients with Wilson disease in central Japan. P
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atients and Methods Between 1999 and 2007, 30 patients were diagnosed as having Wilson disease withan International Diagnostic Score of 4 or more. The phenotypes, genotypes and post-diagnostic courses of these patients were analyzed. Results Twenty-six patients had ATP7B mutations responsible for Wilson disease. Four patients had a single mutant chromosome. There were 2 major mutations of 2333 G>T and 2871 delC (40%), and 6 novel mutations (13%) in our patients. The first clinical manifestation was the hepatic form in 22, neurological form in 5, and hemolysis in 3 patients. The hepatic form was diagnosed around the age of 13 years, followed by neurological complication with a time lag of 9 years. Thus, some patients, especially patients with the neurological form, did not undergo early diagnostic tests including ATP7B analysis. During the post-diagnosis period, 3 patients were hospitalized for recurrent liver disease, and 2 patients committed suicide. One female patient died from acute hepatic failure associated with encephalopathy after fertilization therapy, while 2 male patients recovered from encephalopathy-free, prolonged hepatic failure after noncompliance with drug therapy. The King's Scores for liver transplantation were below the cut-off in both cases. Conclusion To minimize delayed diagnosis, ceruloplasmin determination and ATP7B analysis may be recommended to patients showing hepatic damage of unknown etiology. At gene diagnosis, appropriate management of patients including compliance education and emotional care to prevent suicide might be important. 2010 The Japanese Society of Internal Medicine. © 2010 The Japanese Society of Internal Medicine.
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| 36.
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Sakurai, Masaru ; Takamura, Toshinari ; Miura, Katsuyuki ; Kaneko, Shuichi ; Nakagawa, Hideaki
概要:
金沢大学医薬保健研究域医学系
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| 37.
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Kurita, Seiichiro ; Takamura, Toshinari ; Ota, Tsuguhito ; Matsuzawa-Nagata, Naoto ; Kita, Yuki ; Uno, Masafumi ; Nabemoto, Satoko ; Ishikura, Kazuhide ; Misu, Hirofumi ; Ando, Hitoshi ; Zen, Yoh ; Nakanuma, Yasuni ; Kaneko, Shuichi
概要:
金沢大学大学院医学系研究科<br />金沢大学医薬保健研究域医学系<br />Insulin resistance is a major pathological condition associated with obesity and
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metabolic syndrome. Insulin resistance and the renin-angiotensin system are intimately linked. We evaluated the role of the renin-angiotensin system in the pathogenesis of insulin resistance-associated, non-alcoholic steatohepatitis by using the angiotensin II type 1 receptor blocker olmesartan medoxomil in a diabetic rat model. The effects of olmesartan on methionine- and choline-deficient (MCD) diet-induced steatohepatitis were investigated in obese, diabetic Otsuka Long-Evans Tokushima Fatty (OLETF) rats and control Long-Evans Tokushima Otsuka (LETO) rats. Components of the renin-angiotensin system were up-regulated in the livers of OLETF rats, compared with LETO rats. In OLETF, but not LETO, rats, oral administration of olmesartan for 8 weeks ameliorated insulin resistance. Moreover, olmesartan suppressed MCD diet-induced hepatic steatosis and the hepatic expression of lipogenic genes (sterol regulatory element-binding protein-1c and fatty acid synthase) in OLETF, but not LETO, rats. In both OLETF and LETO rats, olmesartan inhibited hepatic oxidative stress (4-hydroxy-2-nonenal-modified protein) and expression of NADPH oxidase. Olmesartan also inhibited hepatic fibrosis, stellate cell activation, and expression of fibrogenic genes (transforming growth factor-β, α1 [I] procollagen, plasminogen activator inhibitor-1) in both OLETF and LETO rats. In conclusion, pharmacological blockade of the angiotensin II type 1 receptor slows the development of steatohepatitis in the OLETF rat model. This angiotensin II type 1 receptor blocker may exert insulin resistance-associated effects against hepatic steatosis and inflammation as well as direct effects against the generation of reactive oxygen species and fibrogenesis. © 2008 Elsevier B.V. All rights reserved.
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| 38.
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Takashima, Shinichiro ; Sugimoto, Naotoshi ; Takuwa, Noriko ; Okamoto, Yasuo ; Yoshioka, Kazuaki ; Takamura, Masayuki ; Takata, Shigeo ; Kaneko, Shuichi ; Takuwa, Yoh
概要:
金沢大学医薬保健研究域医学系<br />Aims: The lysophospholipid mediator sphingosine-1-phosphate (S1P) activates G protein-coupled recept
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ors (GPCRs) to induce potent inhibition of platelet-derived growth factor (PDGF)-induced Rac activation and, thereby, chemotaxis in rat vascular smooth muscle cells (VSMCs). We explored the heterotrimeric G protein and the downstream mechanism that mediated S1P inhibition of Rac and cell migration in VSMCs. Methods and results: S1P inhibition of PDGF-induced cell migration and Rac activation in VSMCs was abolished by the selective S1P2 receptor antagonist JTE-013. The C-terminal peptides of Gα subunits (Gα-CTs) act as specific inhibitors of respective G protein-GPCR coupling. Adenovirus-mediated expression of Gα12-CT, Gα13-CT, and Gα q-CT, but not that of Gαs-CT or LacZ or pertussis toxin treatment, abrogated S1P inhibition of PDGF-induced Rac activation and migration, indicating that both G12/13 and Gq classes are necessary for the S1P inhibition. The expression of Gαq-CT as well as Gα12-CT and Gα13-CT also abolished S1P-induced Rho stimulation. C3 toxin, but not a Rho kinase inhibitor or a dominant negative form of Rho kinase, abolished S1P inhibition of PDGF-induced Rac activation and cell migration. The angiotensin II receptor AT1, which robustly couples to Gq, did not mediate either Rho activation or inhibition of PDGF-induced Rac activation or migration, suggesting that activation of Gq alone was not sufficient for Rho activation and resultant Rac inhibition. However, the AT1 receptor fused to Gα12 was able to induce not only Rho stimulation but also inhibition of PDGF-induced Rac activation and migration. Phospholipase C inhibition did not affect S1P-induced Rho activation, and protein kinase C activation by a phorbol ester did not mimic S1P action, suggesting that S1P inhibition of migration or Rac was not dependent on the phospholipase C pathway. Conclusion: These observations together suggest that S1P2 mediates inhibition of Rac and migration through the coordinated action of G 12/13 and Gq for Rho activation in VSMCs. © The Author 2008..
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| 39.
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Komura, Takuya ; Sakai, Yoshio ; Honda, Masao ; Takamura, Toshinari ; Matsushima, Kouji ; Kaneko, Shuichi
概要:
金沢大学医薬保健研究域医学系<br />OBJECTIVE - Although patients with diabetes suffer from increased infections and a higher incidence
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of cancer due to impaired immune function, details on diabetes-induced decrease in immunity are lacking. We assessed how immune-mediating peripheral blood mononuclear cells (PBMCs) are affected in diabetes. RESEARCH DESIGN AND METHODS - From 33 patients with type 2 diabetes and 28 healthy volunteers, we obtained PBMCs and investigated their susceptibility to apoptosis and functional alteration. RESULTS - In a subpopulation of PBMCs, monocytes derived from patients with diabetes were more susceptible to apoptosis than monocytes from healthy volunteers. Monocytes from patients with diabetes had decreased phagocytotic activity and were less responsive to Toll-like receptor (TLR) ligands, although the expression of TLRs did not differ significantly between the two groups. Furthermore, monocytes from patients with diabetes had a distinctly different gene expression profile compared with monocytes from normal volunteers as assessed with DNA microarray analysis. Specifically, quantitative real-time detection PCR measurements showed an elevated expression of the markers of endoplasmic reticulum (ER) stress in diabetic monocytes, and electron microscopic examination of monocytes revealed morphologic alterations in the ER of cells derived from patients with diabetes. Consistently, the ER stress inducer tunicamycin increased apoptosis of otherwise healthy monocytes and attenuated the proinflammatory responses to TLR ligands. CONCLUSIONS - These data suggest that monocytes comprise a substantially impaired subpopulation of PBMCs in patients with diabetes and that ER stress is involved in these pathologic changes mechanistically. This implies that the affected monocytes should be investigated further to better understand diabetic immunity. © 2010 by the American Diabetes Association.
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| 40.
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Hamaguchi, Erika ; Takamura, Toshinari ; Sakurai, Masaru ; Mizukoshi, Eishiro ; Zen, Yoh ; Takeshita, Yumie ; Kurita, Seiichiro ; Arai, Kuniaki ; Yamashita, Tatsuya ; Sasaki, Motoko ; Nakanuma, Yasuni ; Kaneko, Shuichi
概要:
金沢大学医薬保健研究域医学系<br />OBJECTIVE - The goal of this study was to examine whether metabolic abnormalities are responsible fo
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r the histological changes observed in Japanese patients with nonalcoholic fatty liver disease (NAFLD) who have undergone serial liver biopsies. RESEARCH DESIGN AND METHODS - In total, 39 patients had undergone consecutive liver biopsies. Changes in their clinical data were analyzed, and biopsy specimens were scored histologically for stage. RESULTS - The median follow-up time was 2.4 years (range 1.0-8.5). Liver fibrosis had improved in 12 patients (30.7%), progressed in 11 patients (28.2%), and remained unchanged in 16 patients (41%). In a Cox proportional hazard model, decrease in A1C and use of insulin were associated with improvement of liver fibrosis independent of age, sex, and BMI. However, ΔA1C was more strongly associated with the improvement of liver fibrosis than use of insulin after adjustment for each other (χ2; 7.97 vs. 4.58, respectively). CONCLUSIONS - Tight glycemic control may prevent histological progression in Japanese patients with NAFLD. © 2010 by the American Diabetes Association.
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| 41.
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Sakurai, Masaru ; Takamura, Toshinari ; Miura, Katsuyuki ; Kaneko, Shuichi ; Nakagawa, Hideaki
概要:
金沢大学医薬保健研究域医学系<br />We attempted to determine sex differences in obesity-related metabolic abnormalities in a relatively
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large middle-aged Japanese population. The study population consisted of 2935 men and 1622 women who were 35 to 59 years old. Metabolic abnormalities were determined using the Japanese criteria for metabolic syndrome, and we evaluated the number of metabolic abnormalities discriminated by waist circumference. In men, the mean number of metabolic abnormalities increased as the waist circumference increased. In women, although the mean number of metabolic abnormalities increased as the waist circumference increased, the mean number was less than 1 even in those with a waist circumference of at least 95 cm. According to the receiver operating characteristic curve, the cutoff levels yielding the maximal sensitivity plus specificity for predicting the prevalence of one or more obesity-related metabolic abnormalities were 80 cm in men and 73 cm in women. However, the positive predictive value was as low as 28.8% in men and 7.1% in women, which may not be suitable for a screening test, especially in women. Middle-aged Japanese women seem to be resistant to obesity-induced metabolic abnormalities, and waist circumference would not effectively predict the existence of metabolic syndrome. In setting the cutoff points in guidelines, a greater emphasis should be placed on the absolute risk of having abnormalities or diseases. © 2009 Elsevier Inc. All rights reserved.
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| 42.
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Honda, Masao ; Sakai, Akito ; Yamashita, Tatsuya ; Nakamotoa, Yasunari ; Mizukoshi, Eishiro ; Sakai, Yoshio ; Yamashita, Taro ; Nakamura, Mikiko ; Shirasaki, Takayoshi ; Horimoto, Katsuhisa ; Tanaka, Yasuhito ; Tokunaga, Katsushi ; Mizokami, Masashi ; Kaneko, Shuichi ; Hokuriku Liver Study Group
概要:
金沢大学医薬保健研究域医学系<br />Background & Aims: Multiple viral and host factors are related to the treatment response to pegylate
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d-interferon and ribavirin combination therapy; however, the clinical relevance and relationship of these factors have not yet been fully evaluated. Methods: We studied 168 patients with chronic hepatitis C who received pegylated-interferon and ribavirin combination therapy. Gene expression profiles in the livers of 91 patients were analyzed using an Affymetrix genechip (Affymetrix, Santa Clara, CA). The expression of interferon-stimulated genes (ISGs) was evaluated in all samples by real-time polymerase chain reaction. Genetic variation in interleukin 28B (IL28B; rs8099917) was determined in 91 patients. Results: Gene expression profiling of the liver differentiated patients into 2 groups: patients with up-regulated ISGs and patients with down-regulated ISGs. A high proportion of patients with no response to treatment was found in the up-regulated ISGs group (P = .002). Multivariate logistic regression analysis showed that ISGs (<3.5) (odds ratio [OR], 16.2; P < .001), fibrosis stage (F1-F2) (OR, 4.18; P = .003), and ISDR mutation (<2) (OR, 5.09; P = .003) were strongly associated with the viral response. The IL28B polymorphism of 91 patients showed that 66% were major homozygotes (TT), 30% were heterozygotes (TG), and 4% were minor homozygotes (GG). Interestingly, hepatic ISGs were associated with the IL28B polymorphism (OR, 18.1; P < .001), and its expression was significantly higher in patients with the minor genotype (TG or GG) than in those with the major genotype (TT). Conclusions: The expression of hepatic ISGs is strongly associated with treatment response and genetic variation of IL28B. The differential role of host and viral factors as predicting factors may also be present. © 2010 AGA Institute.
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| 43.
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Sakurai, Sho ; Miura, K. ; Takamura, Toshinari ; Ishizaki, Masao ; Morikawa, Y. ; Nakamura, K. ; Yoshita, Katsushi ; Kido, Teruhiko ; Naruse, Yuchi ; Kaneko, Shuichi ; Nakagawa, H.
概要:
金沢大学医薬保健研究域医学系<br />金沢医科大学健康増進予防医学（公衆衛生学）<br />Aims This study investigated the relationship between waist circumference
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and the subsequent incidence of Type 2 diabetes and the association with insulin resistance and pancreatic B-cell function in relatively lean Japanese individuals. Methods The study participants were 3992 employees (2533 men and 1459 women, aged 35-55 years) of a metal-products factory in Japan. The incidence of diabetes was determined in annual medical examinations during an 8-year follow-up. We calculated age- and sex-adjusted hazard ratios (HRs) according to the sex-specific quintile of waist circumference at baseline. Differences in baseline insulin resistance [homeostatis model assessment (HOMA)-IR] and pancreatic B-cell function (HOMA-B) were compared between participants who developed diabetes and those who did not. Results During the follow-up, 218 participants developed diabetes. Age- and sex-adjusted HRs across the quintiles of waist circumference were 1.78, 1.00 (reference), 1.59, 3.11 and 3.30, respectively (P for trend, < 0.0001). The HR for the lowest quintile was significantly higher than that for the second quintile. Among participants with waist circumference of the lowest quintile, HOMA-B was lower in those who developed diabetes than in those who did not [33.1 (24.1-45.0) vs. 54.3 (37.9-74.6) median (interquartile range), P < 0.0001], but HOMA-IR did not differ between these groups. Conclusions There was a J-shaped relationship between waist circumference and subsequent risk for Type 2 diabetes in relatively lean Japanese individuals; lower pancreatic B-cell function may also increase the risk of diabetes in very lean Japanese people. © 2009 Diabetes UK.
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| 44.
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Takuwa, Noriko ; Ohkura, Sei-Ichiro ; Takashima, Shin-ichiro ; Ohtani, Keisuke ; Okamoto, Yasuo ; Tanaka, Tamotsu ; Hirano, Kaoru ; Usui, Soichiro ; Wang, Fei ; Du, Wa ; Yoshioka, Kazuaki ; Banno, Yoshiko ; Sasaki, Motoko ; Ichi, Ikuyo ; Okamura, Miwa ; Sugimoto, Naotoshi ; Mizugishi, Kiyomi ; Nakanuma, Yasuni ; Ishii, Isao ; Takamura, Masayuki ; Kaneko, Shuichi ; Kojo, Shosuke ; Satouchi, Kiyoshi ; Mitumori, Kunitoshi ; Chun, Jerold ; Takuwa, Yoh
概要:
金沢大学医薬保健研究域医学系<br />Aims Sphingosine kinase 1 (SPHK1), its product sphingosine-1-phosphate (S1P), and S1P receptor subty
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pes have been suggested to play protective roles for cardiomyocytes in animal models of ischaemic preconditioning and cardiac ischaemia/reperfusion injury. To get more insight into roles for SPHK1 in vivo, we have generated SPHK1-transgenic (TG) mice and analysed the cardiac phenotype.Methods and results SPHK1-TG mice overexpressed SPHK1 in diverse tissues, with a nearly 20-fold increase in enzymatic activity. The TG mice grew normally with normal blood chemistry, cell counts, heart rate, and blood pressure. Unexpectedly, TG mice with high but not low expression levels of SPHK1 developed progressive myocardial degeneration and fibrosis, with upregulation of embryonic genes, elevated RhoA and Rac1 activity, stimulation of Smad3 phosphorylation, and increased levels of oxidative stress markers. Treatment of juvenile TG mice with pitavastatin, an established inhibitor of the Rho family G proteins, or deletion of S1P3, a major myocardial S1P receptor subtype that couples to Rho GTPases and transactivates Smad signalling, both inhibited cardiac fibrosis with concomitant inhibition of SPHK1-dependent Smad-3 phosphorylation. In addition, the anti-oxidant N-2-mercaptopropyonylglycine, which reduces reactive oxygen species (ROS), also inhibited cardiac fibrosis. In in vivo ischaemia/reperfusion injury, the size of myocardial infarct was 30 decreased in SPHK1-TG mice compared with wild-type mice.Conclusion These results suggest that chronic activation of SPHK1-S1P signalling results in both pathological cardiac remodelling through ROS mediated by S1P3 and favourable cardioprotective effects.
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| 45.
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Nakamoto, Yasunari ; Mizukoshi, Eishiro ; Kitahara, Masaaki ; Arihara, Fumitaka ; Sakai, Yoshio ; Kakinoki, Kaheita ; Fujita, Yui ; Marukawa, Yohei ; Arai, Kuniaki ; Yamashita, Tatsuya ; Mukaida, Naofumi ; Matsushima, Kouji ; Matsui, Osamu ; Kaneko, Shuichi
概要:
金沢大学医薬保健研究域医学系<br />Despite curative locoregional treatments for hepatocellular carcinoma (HCC), tumour recurrence rates
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remain high. The current study was designed to assess the safety and bioactivity of infusion of dendritic cells (DCs) stimulated with OK432, a streptococcus-derived anti-cancer immunotherapeutic agent, into tumour tissues following transcatheter hepatic arterial embolization (TAE) treatment in patients with HCC. DCs were derived from peripheral blood monocytes of patients with hepatitis C virus-related cirrhosis and HCC in the presence of interleukin (IL)-4 and granulocyte-macrophage colony-stimulating factor and stimulated with 0.1 KE/ml OK432 for 2 days. Thirteen patients were administered with 5 × 106 of DCs through arterial catheter during the procedures of TAE treatment on day 7. The immunomodulatory effects and clinical responses were evaluated in comparison with a group of 22 historical controls treated with TAE but without DC transfer. OK432 stimulation of immature DCs promoted their maturation towards cells with activated phenotypes, high expression of a homing receptor, fairly well-preserved phagocytic capacity, greatly enhanced cytokine production and effective tumoricidal activity. Administration of OK432-stimulated DCs to patients was found to be feasible and safe. Kaplan-Meier analysis revealed prolonged recurrence-free survival of patients treated in this manner compared with the historical controls (P = 0.046, log-rank test). The bioactivity of the transferred DCs was reflected in higher serum concentrations of the cytokines IL-9, IL-15 and tumour necrosis factor-α and the chemokines CCL4 and CCL11. Collectively, this study suggests that a DC-based, active immunotherapeutic strategy in combination with locoregional treatments exerts beneficial anti-tumour effects against liver cancer. © 2010 The Authors. Clinical and Experimental Immunology © 2010 British Society for Immunology.
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| 46.
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Wada, Takashi ; Sakai, Norihiko ; Sakai, Yoshio ; Matsushima, Kouji ; Kaneko, Shuichi ; Furuichi, Kengo
概要:
金沢大学医薬保健研究域医学系<br />Cellular mechanisms have been proposed in the pathogenesis of fibrotic processes in the kidney. In t
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his setting, cell sources underlying the generation of matrix-producing cells in diseased kidneys have been categorized as activated resident stromal cells (e.g., fibroblasts, pericytes), infiltrating bone-marrow-derived cells (e.g., fibrocytes, T cells, macrophages), and cells derived from epithelial-mesenchymal transition/endothelial-mesenchymal transition. Among these cell sources, accumulating evidence has shed light on the involvement of bone-marrow-derived cells, including monocytes/macrophages, and a circulating mesenchymal progenitor cell, fibrocyte, in the progression of fibrosis in kidney. Bone-marrow-derived cells positive for CD45 or CD34, and type 1 (pro)collagen dependent on the chemokine and renin-angiotensin systems migrate into diseased kidneys and enhance synthesis matrix protein, cytokines/chemokines, and profibrotic growth factors, which may promote and escalate chronic inflammatory processes and possible interaction with resident stromal cells, thereby perpetuating kidney fibrosis. © 2010 Japanese Society of Nephrology.
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| 47.
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Kakinoki, Kaheita ; Nakamoto, Yasunari ; Kagaya, Takashi ; Tsuchiyama, Tomoya ; Sakai, Yoshio ; Nakahama, Tohru ; Mukaida, Naofumi ; Kaneko, Shuichi
概要:
金沢大学医薬保健研究域医学系<br />The prognosis of patients with hepatocellular carcinoma (HCC) remains poor, largely as a result of i
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ntrahepatic metastasis. Using a mouse model of intrahepatic metastasis, we investigated whether chemokine ligand 2/monocyte chemoattractant protein-1 (CCL2/MCP-1) could potentiate the antitumor effects of the herpes simplex virus thymidine kinase/ganciclovir (HSV-tk/GCV) system.Methods: Mouse hepatoma cells infected with recombinant adenovirus vectors expressing HSV-tk, CCL2/MCP-1 and LacZ at multiplicities of infection of Ad-tk/Ad-MCP1 = 3/0.03 (T/MLow), 3/3 (T/MHigh) and Ad-tk/Ad-LacZ = 3/3 (T/L) were injected into BALB/c mice.Results: Intrahepatic tumor growth was significantly lower in T/MLow mice. By contrast, no tumor suppression was observed in T/MHigh mice. The tumor-specific cytolytic activities of splenocytes from T/MLow and T/MHigh mice were comparable. Immunohistochemical analysis of liver tissues showed similar infiltration by Mac-1+ and T cells in these animals, whereas the proportions of classical activated (M1) monocytes/macrophages were significantly higher in T/MLow mice. In addition, interleukin-12 production was elevated in these tissues. Vascular endothelial growth factor-A expression and CD31+ microvessels were increased in T/MHigh mice.Conclusions: Collectively, these results demonstrate that an adequate amount of CCL2/MCP-1, together with the HSV-tk/GCV system, may induce T helper 1-polarized antitumor effects without inducing tumor angiogenesis in the microenvironment of intrahepatic HCC progression. © 2010 John Wiley & Sons, Ltd.
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| 48.
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Hodo, Yuji ; Hashimoto, Shin-ichi ; Honda, Masao ; Yamashita, Taro ; Suzuki, Yutaka ; Sugano, Sumio ; Kaneko, Shuichi ; Matsushima, Kouji
概要:
金沢大学医薬保健研究域医学系<br />To elucidate the molecular feature of human hepatocellular carcinoma (HCC), we performed 5'-end seri
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al analysis of gene expression (5'SAGE), which allows genome-wide identification of transcription start sites in addition to quantification of mRNA transcripts. Three 5'SAGE libraries were generated from normal human liver (NL), non-B, non-C HCC tumor (T), and background non-tumor tissues (NT). We obtained 226,834 tags from these libraries and mapped them to the genomic sequences of a total of 8,410 genes using RefSeq database. We identified several novel transcripts specifically expressed in HCC including those mapped to the intronic regions. Among them, we confirmed the transcripts initiated from the introns of a gene encoding acyl-coenzyme A oxidase 2 (. ACOX2). The expression of these transcript variants were up-regulated in HCC and showed a different pattern compared with that of ordinary ACOX2 mRNA. The present results indicate that the transcription initiation of a subset of genes may be distinctively altered in HCC, which may suggest the utility of intronic RNAs as surrogate tumor markers. © 2010 Elsevier Inc.
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| 49.
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本多, 政夫 ; 金子, 周一 ; Honda, Masao ; Kaneko, Shuichi
概要:
我が国の肝細胞癌は慢性肝炎，それも肝硬変のような進行した肝病変を発生母地とすることが大半であり，その成因の90％がウイルス性慢性肝炎である．ウイルス学的には全く異なるB型肝炎ウイルス（HBV）及びC型肝炎ウイルス（HCV）は同じように慢性肝
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炎·肝硬変，更には肝細胞癌を引き起こす．病理学的には両肝炎の差異は認め難いものの，cDNAマイクロアレイを用いた網羅的遺伝子発現解析による分子生物学的手法により両肝炎に起こる細胞内情報伝達機構の違いが明らかとなった．B型及びC型慢性肝炎から肝発癌への臨床像も多数症例の経験より明らかになっている．慢性肝炎から肝発癌へ至る分子機序を明らかにすることによって，肝疾患治療の新たなストラテジーの構築が可能になる．
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| 50.
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Iwata, Yasunori ; Furuichi, Kengo ; Kitagawa, Kiyoki ; Hara, Akinori ; Okumura, Toshiya ; Kokubo, Satoshi ; Shimizu, Kazuaki ; Sakai, Norihiko ; Sagara, Akihiro ; Kurokawa, Yukie ; Ueha, Satoshi ; Matsushima, Satoshi ; Kaneko, Shuichi ; Wada, Takashi
概要:
金沢大学医薬保健研究域医学系<br />Objective: Myeloid-derived suppressor cells (MDSCs) have been identified as immunosuppressive cells
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in tumor-related inflammation. However, the pathogenesis of MDSCs for autoimmune disease has not been investigated as yet. The aim of this study was to address whether MDSCs contribute to autoimmune organ injury in lupus-prone mice. Methods: MDSCs were analyzed by flow cytometric staining of CD11b+ GR-1+ in MRL-Faslpr mice. CD4+ T-cell proliferation assay was performed by coculture with CD11b+ GR-1+ splenocytes. The percentage of immunosuppressive cells was examined during disease progression. Expression of chemokine receptor on immunosuppressive cells was analyzed, and chemotaxis assay was performed. Results: CD11b+ GR-1low cells had a suppressive effect on CD4+ T-cell proliferation, which was restored by an arginase-1 inhibitor. CD11b+ GR-1low cells increased in percentage during disease progression in kidney and blood. The number of migrated CD11b+ GR-1low cells increased in the presence of monocyte chemoattractant protein-1/CCL2. Conclusion: We assessed the involvement of CD11b+ GR-1low cells in autoimmune disorder in MRL-Faslpr mice. These cells regulate immunological responses via CCL2/CCR2 signaling. The regulation of immunosuppressive monocytes may provide novel therapeutic strategy for organ damage in autoimmune diseases. © 2010 Japanese Society of Nephrology..
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Matsuzawa-Nagata, Naoto ; Takamura, Toshinari ; Ando, Hitoshi ; Nakamura, Seiji ; Kurita, Seiichiro ; Misu, Hirofumi ; Ota, Tsuguhito ; Yokoyama, Masayoshi ; Honda, Masao ; Miyamoto, Ken-ichi ; Kaneko, Shuichi
概要:
金沢大学医薬保健研究域医学系<br />Insulin resistance is a key pathophysiological feature of metabolic syndrome. However, the initial e
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vents triggering the development of insulin resistance and its causal relations with dysregulation of glucose and fatty acids metabolism remain unclear. We investigated biological pathways that have the potential to induce insulin resistance in mice fed a high-fat diet (HFD). We demonstrate that the pathways for reactive oxygen species (ROS) production and oxidative stress are coordinately up-regulated in both the liver and adipose tissue of mice fed an HFD before the onset of insulin resistance through discrete mechanism. In the liver, an HFD up-regulated genes involved in sterol regulatory element binding protein 1c-related fatty acid synthesis and peroxisome proliferator-activated receptor α-related fatty acid oxidation. In the adipose tissue, however, the HFD down-regulated genes involved in fatty acid synthesis and up-regulated nicotinamide adenine dinucleotide phosphate (NADPH) oxidase complex. Furthermore, increased ROS production preceded the elevation of tumor necrosis factor-α and free fatty acids in the plasma and liver. The ROS may be an initial key event triggering HFD-induced insulin resistance. © 2008 Elsevier Inc. All rights reserved.
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Wada, Takashi ; Shimizu, Miho ; Toyama, Tadashi ; Hara, Akinori ; Kaneko, Shuichi ; Furuichi, Kengo
概要:
金沢大学医薬保健研究域医学系<br />Patients suffering from diabetic nephropathy, resulting in end-stage renal failure, are increasing i
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n number. The pathophysiology of diabetic nephropathy remains to be fully investigated. In the clinical setting, the presence of albuminuria/overt proteinuria and a low glomerular filtration rate may predict poor renal prognosis, but the prognosis of the normoalbuminuric renally insufficient diabetic patient remains controversial. In addition to the measurement of urinary albumin excretion, biomarker studies to detect diabetic nephropathy more specifically at the early stage have been performed worldwide. There is a growing body of evidence for remission and/or regression of diabetic nephropathy, which may be an indicator for cardiovascular and renal risk reduction. Deeper insights into the pathological characteristics as well as the clinical impact of albuminuria on renal and cardiovascular outcome are required. © 2011 Japanese Society of Nephrology.
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Kakuda, Yuko ; Harada, Kenichi ; Sawada-Kitamura, Seiko ; Ikeda, Hiroko ; Sato, Yasunori ; Sasaki, Motoko ; Okafuji, Hirofumi ; Mizukoshi, Eishiro ; Terasaki, Shuichi ; Ohta, Hajime ; Kasashima, Satomi ; Kawashima, Atsuhiro ; Kaizaki, Yasuharu ; Kaneko, Shuichi ; Nakanuma, Yasuni
概要:
Recently, our research team proposed a new histologic staging and grading system for primary biliary cirrhosis (PBC) tha
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t takes into account necroinflammatory activity and histologic heterogeneity. The present study aimed to confirm the usefulness of the new evaluation system. A total of 152 liver biopsy specimens and clinical data (including outcomes in patients with PBC before treatment with ursodeoxycholic acid) were analyzed with respect to the new system. Staging was evaluated on the basis of 3 histologic components (fibrosis, bile duct loss, and deposition of orcein-positive granules), and grading was assessed on the basis of chronic cholangitis activity and hepatitis activity. Concurrently, the classical systems, that is, the Scheuer and Ludwig staging systems, were also assessed and compared with our new system. PBC cases showed different distributions in each stage of the 3 systems. The new staging and grading system reflected liver dysfunctions before specific treatment. This was on a par with the results obtained using the classical systems. Development of cirrhosis-related conditions correlated well with the new staging system compared with the 2 classical staging systems, and in particular, the amount of deposition of orcein-positive granules could reflect development of cirrhosis-related conditions (scores 0-1 versus scores 2-3 groups, P < .0001). In conclusion, the new PBC staging system was demonstrated to reflect clinicolaboratory features, and its progression was associated with the development of cirrhosis-related conditions. © 2013 Elsevier Inc. All rights reserved.
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| 54.
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Kitajima, Shinji ; Sakai, Norihiko ; Furuichi, Kengo ; Tomokage, Miki ; Hara, Akinori ; Kitagawa, Kiyoki ; Sawada-Kitamura, Seiko ; Zen, Yoh ; Nakada, Mitsutoshi ; Kaneko, Shuichi ; Wada, Takashi
概要:
金沢大学医薬保健研究域医学系<br />We described a case of neurosarcoidosis with necrotizing sarcoid granulomatosis in a 22-year-old man
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. Contrast-enhanced brain computed tomography scan and magnetic resonance imaging showed intracerebral multiple nodular lesions. Noncaseating and partial necrotizing granulomas were detected in the specimen resected by neurosurgery. In addition, immunohistochemical examination revealed the expression of angiotensin-converting enzyme in necrotizing granuloma. Thus, these findings were consistent with neurosarcoidosis. Clinical and pathological presentation, immunological features, and treatment modalities of neurosarcoidosis are discussed. © 2010 Japan College of Rheumatology.<br />This is the pre-peer reviewed version of the following article: [Full cite], which has been published in final form at [link to final article].
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| 55.
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Sunagozaka, Hajime ; Honda, Masao ; Yamashita, Taro ; Nishino, Ryuhei ; Takatori, Hajime ; Arai, Kuniaki ; Yamashita, Tatsuya ; Sakai, Yoshio ; Kaneko, Shuichi
概要:
The identification of genes involved in tumor growth is crucial for the development of inventive anticancer treatments.
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Here, we have cloned a 17-kDa secretory protein encoded by c19orf10 from hepatocellular carcinoma (HCC) serial analysis of gene expression libraries. Gene expression analysis indicated that c19orf10 was overexpressed in approximately two-thirds of HCC tissues compared to the adjacent noncancerous liver tissues, and its expression was significantly positively correlated with that of alpha-fetoprotein (AFP). Overexpression of c19orf10 enhanced cell proliferation of AFP-negative HLE cells, whereas knockdown of c19orf10 inhibited cell proliferation of AFP-positive Hep3B and HuH7 cells along with G1 cell cycle arrest. Supplementation of recombinant c19orf10 protein in culture media enhanced cell proliferation in HLE cells, and this effect was abolished by the addition of antibodies developed against c19orf10. Intriguingly, c19orf10 could regulate cell proliferation through the activation of Akt/mitogen-activated protein kinase pathways. Taken together, these data suggest that c19orf10 might be one of the growth factors and potential molecular targets activated in HCC. Copyright © 2010 UICC.
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| 56.
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Oshima, Megumi ; Kitajima, Shinji ; Toyama, Tadashi ; Hara, Akinori ; Kitagawa, Kiyoki ; Iwata, Yasunori ; Shimizu, Miho ; Nishio, Saori ; Imura, Junko ; Yokoyama, Hitoshi ; Furuichi, Kengo ; Kaneko, Shuichi ; Wada, Takashi
概要:
We herein report a case of spontaneous pregnancy and preterm delivery in a 29-year-old patient with myeloperoxidase-anti
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neutrophil cytoplasmic antibody (ANCA)-associated glomerulonephritis. Her basal serum creatinine level before pregnancy was 1.4 mg/dL and her urinary protein level was approximately 2 g/day. The proteinuria and hematuria increased during pregnancy, and the patient was admitted to our hospital and treated with prednisolone (PSL). At 27 weeks of gestation, she delivered a live infant weighing 848 g via cesarean section. No relapse of ANCA-associated glomerulonephritis occurred. © 2013 The Japanese Society of Internal Medicine.
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| 57.
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Yamashita, Tatsuya ; Arai, Kuniaki ; Sunagozaka, Hajime ; Ueda, Teruyuki ; Terashima, Takeshi ; Yamashita, Taro ; Mizukoshi, Eishiro ; Sakai, Akito ; Nakamoto, Yasunari ; Honda, Masao ; Kaneko, Shuichi
概要:
Objective: This randomized phase II trial compared the response rates to treatment with interferon (IFN) combined with h
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epatic arterial infusion of fluorouracil (FU) plus cisplatin (CDDP) or FU alone in patients with advanced hepatocellular carcinoma (HCC). Methods: A total of 114 patients with measurable advanced HCC were enrolled and randomized into 2 groups. FU (300 mg/m2, days 1–5, days 8–12) with or without CDDP (20 mg/m2, days 1 and 8) was administered via the hepatic artery. IFNα-2b was administered 3 times per week for 4 weeks. Results: The response rates were 45.6% for the IFN/FU + CDDP group and 24.6% for the IFN/FU group. The response rate was significantly higher in the IFN/FU + CDDP group (p = 0.030). The median overall survival period was 17.6 months in the IFN/FU + CDDP group versus 10.5 months in the IFN/FU group (p = 0.522). The median progression-free survival period was 6.5 months in the IFN/FU + CDDP group versus 3.3 months in the IFN/FU group (p = 0.0048). Hematological toxicity was common, but no toxicity-related deaths were observed. Conclusion: These results show the clinical efficacy of adding CDDP to the hepatic arterial infusion of FU in combined chemotherapy regimens with IFN.
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| 58.
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Iwata, Yasunori ; Furuichi, Kengo ; Kaneko, Shuichi ; Wada, Takashi
概要:
Lupus nephritis (LN) is a major clinical manifestation of systemic lupus erythematosus (SLE). Although numerous abnormal
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ities of immune system have been proposed, cytokine overexpression plays an essential role in the pathogenesis of LN. In the initial phase of the disease, the immune deposits and/or autoantibodies induce cytokine production in renal resident cells, leading to further inflammatory cytokine/chemokine expression and leukocyte infiltration and activation. Then, infiltrate leukocytes, such as macrophages (Mψ) and dendritic cells (DCs), secrete a variety of cytokines and activate nave T cells, leading the cytokine profile towards T helper (Th)1, Th2, and/or Th17. Recent studies revealed these inflammatory processes in experimental animal models as well as human LN. The cytokine targeted intervention may have the therapeutic potentials for LN. This paper focuses on the expression of cytokine and its functional role in the pathogenesis of LN. © 2011 Yasunori Iwata et al.
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| 59.
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Takeshita, Yumie ; Takamura, Toshinari ; Inoue, Oto ; Okumura, Miki ; Kato, Kenichiro ; Sunagozaka, Hajime ; Arai, Kuniaki ; Misu, Hirofumi ; Nakamura, Minoru ; Nakanuma, Yasuni ; Kaneko, Shuichi
概要:
A 73-year-old woman had previously been diagnosed with CREST syndrome, PBC and diabetes. Hepatic fibrosis was not eviden
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t, in spite of the transudative ascites and active esophageal varices. ACA were positive, whereas AMA and anti-gp210 antibodies were negative. She showed low urinary excretion of C-peptide and was weakly positive for anti-GAD antibody. She was diagnosed with a form of PBC that progresses via portal hypertension rather than liver failure and with SPIDDM. Her HLA type did not contain risk allele for IDDM or PBC. SPIDDM should be considered when patients with PBC with portal hypertension-type progression develop diabetes. © 2012 The Japanese Society of Internal Medicine.
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| 60.
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Sakurai, Masaru ; Nakamura, Koshi ; Miura, Katsuyuki ; Takamura, Toshinari ; Yoshita, Katsushi ; Morikawa, Yuko ; Ishizaki, Masao ; Kido, Teruhiko ; Naruse, Yuchi ; Suwazono, Yasushi ; Kaneko, Shuichi ; Sasaki, Satoshi ; Nakagawa, Hideaki
概要:
This cohort study investigated the association between dietary glycemic index (GI), glycemic load (GL), and the incidenc
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e of type 2 diabetes mellitus in middle-aged Japanese men, and the effect of insulin resistance and pancreatic B-cell function on the association. Participants were 1995 male employees of a metal products factory in Japan. Dietary GI and GL were assessed using a self-administered diet history questionnaire. The incidence of diabetes was detected in annual medical examinations over a 6-year period. The association between GI, GL, and the incidence of diabetes was evaluated using Cox proportional hazards models. During the study, 133 participants developed diabetes. Age- and body mass index-adjusted hazard ratios across the GI quintiles were 1.00 (reference), 1.62, 1.50, 1.68, and 1.80; and those of GL were 1.00 (reference), 1.07, 1.48, 0.95, and 0.98. The hazard ratio for the highest GI quintile was significantly greater than that for the lowest quintile. The influence of GI was more pronounced in the lowest insulin resistance subgroups. GI and pancreatic B-cell function were independently associated with the incidence of type 2 diabetes mellitus; participants with low B-cell function and the highest tertile of GI had the highest risk of diabetes. Dietary GI is associated with the incidence of diabetes in middle-aged Japanese men. GI and B-cell function were independently associated with incidence of diabetes. © 2012 Elsevier Inc. All rights reserved.
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| 61.
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Nakagawa, Hidetoshi ; Mizukoshi, Eishiro ; Iida, Noriho ; Terashima, Takeshi ; Kitahara, Masaaki ; Marukawa, Yohei ; Kitamura, Kazuya ; Nakamoto, Yasunari ; Hiroishi, Kazumasa ; Imawari, Michio ; Kaneko, Shuichi
概要:
Radiofrequency ablation therapy (RFA) is a radical treatment for liver cancers and induces tumor antigen-specific immune
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responses. In the present study, we examined the antitumor effects of focal OK-432-stimulated dendritic cell (DC) transfer combined with RFA and analyzed the functional mechanisms involved using a murine model. C57BL/6 mice were injected subcutaneously with colon cancer cells (MC38) in their bilateral flanks. After the establishment of tumors, the subcutaneous tumor on one flank was treated using RFA, and then OK-432-stimulated DCs were injected locally. The antitumor effect of the treatment was evaluated by measuring the size of the tumor on the opposite flank, and the immunological responses were assessed using tumor-infiltrating lymphocytes, splenocytes and draining lymph nodes. Tumor growth was strongly inhibited in mice that exhibited efficient DC migration after RFA and OK-432-stimulated DC transfer, as compared to mice treated with RFA alone or treatment involving immature DC transfer. We also demonstrated that the antitumor effect of this treatment depended on both CD8-positive and CD4-positive cells. On the basis of our findings, we believe that combination therapy for metastatic liver cancer consisting of OK-432-stimulated DCs in combination with RFA can proceed to clinical trials, and it is anticipated to be markedly superior to RFA single therapy. © 2013 Springer-Verlag Berlin Heidelberg.
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| 62.
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Misu, Hirofumi ; Ishikura, Kazuhide ; Kurita, Seiichiro ; Takeshita, Yumie ; Ota, Tsuguhito ; Saito, Yoshiro ; Takahashi, Kazuhiko ; Kaneko, Shuichi ; Takamura, Toshinari
概要:
Background: We recently identified selenoprotein P (SeP) as a liver-derived secretory protein that causes insulin resist
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ance in the liver and skeletal muscle; however, it is unknown whether and, if so, how SeP acts on adipose tissue. The present study tested the hypothesis that SeP is related to hypoadiponectinemia in patients with type 2 diabetes. Methodology/Principal Findings: We compared serum levels of SeP with those of adiponectin and other clinical parameters in 36 patients with type 2 diabetes. We also measured levels of blood adiponectin in SeP knockout mice. Circulating SeP levels were positively correlated with fasting plasma glucose (r = 0.35, P = 0.037) and negatively associated with both total and high-molecular adiponectin in patients with type 2 diabetes (r = -0.355, P = 0.034; r = -0.367, P = 0.028). SeP was a predictor of both total and high-molecular adiponectin, independently of age, body weight, and quantitative insulin sensitivity index (β = -0.343, P = 0.022; β = -0.357, P = 0.017). SeP knockout mice exhibited an increase in blood adiponectin levels when fed regular chow or a high sucrose, high fat diet. Conclusions/Significance: These results suggest that overproduction of liver-derived secretory protein SeP is connected with hypoadiponectinemia in patients with type 2 diabetes. © 2012 Misu et al.
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| 63.
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Nakade, Yusuke ; Takamura, Toshinari ; Sakurai, Masaru ; Misu, Hirofumi ; Nagata, Mitsuko ; Nanbu, Yuko ; Oe, Hiroyasu ; Takamura, Toshiji ; Sakai, Yoshio ; Kaneko, Shuichi ; Wada, Takashi
概要:
The aim of the present study was to examine whether there is a relationship between autonomic function and post-challeng
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e hyperglycemia in patients with type 2 diabetes. Subjects included 122 Japanese patients newly diagnosed with type 2 diabetes. Autonomic nerve function was assessed using coefficients of variation of the R-R intervals on electrocardiograms (CVRR). Unlike anthropometry, insulin secretion and insulin resistance, age (r =)0.209, P < 0.021) and post-challenge plasma glucose at 120 min (PG120; r =)0.219, P < 0.015) were the only variables significantly correlated with CVRR. Age was not significantly correlated with PG120. In multiple regression analyses, CVRR Z-score, but not age, was significantly correlated with PG120. The present results suggest that autonomic function affects post-challenge blood glucose levels independently of age. © 2011 Asian Association for the Study of Diabetes and Blackwell Publishing Asia Pty Ltd.
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| 64.
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Kaneko, Shuichi ; Furuse, Junji ; Kudo, Masatoshi ; Ikeda, Kenji ; Honda, Masao ; Nakamoto, Yasunari ; Onchi, Morikazu ; Shiota, Goshi ; Yokosuka, Osamu ; Sakaida, Isao ; Takehara, Tetsuo ; Ueno, Yoshiyuki ; Hiroishi, Kazumasa ; Nishiguchi, Shuhei ; Moriwaki, Hisataka ; Yamamoto, Kazuhide ; Sata, Michio ; Obi, Shuntaro ; Miyayama, Shiro ; Imai, Yukinori
概要:
The "Guideline on the Use of New Anticancer Drugs for the Treatment of Hepatocellular Carcinoma" was prepared by the Stu
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dy Group on New Liver Cancer Therapies established by the "Research Project on Emergency Measures to Overcome Hepatitis" under the auspices of the Health and Labour Sciences Research Grant. The Guideline brings together data collected by the Study Group on the use and incidence of adverse events in 264 patients with advanced hepatocellular carcinoma (HCC) treated using sorafenib and in 535 patients with advanced HCC treated using miriplatin at 16 participating institutions up until 22 December 2010, as well as referring to the published studies, academic presentations, and reports from the private sector. The aim of this Guideline is to facilitate understanding and current thinking regarding the proper usage of new anticancer drugs towards actual use in therapy. In terms of the format, the Guideline presents "clinical questions" on issues pertaining to medical care, makes "recommendations" on diagnosis and treatment in response to each of these clinical questions, and provides a rationale for these recommendations in the form of "scientific statements". © 2012 The Japan Society of Hepatology.
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| 65.
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Marukawa, Yohei ; Nakamoto, Yasunari ; Kakinoki, Kaheita ; Tsuchiyama, Tomoya ; Iida, Noriho ; Kagaya, Takashi ; Sakai, Yoshio ; Naito, Makoto ; Mukaida, Naofumi ; Kaneko, Shuichi
概要:
Suicide gene therapy using the herpes simplex virus thymidine kinase/ganciclovir (HSV-tk/GCV) system combined with monoc
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yte chemoattractant protein-1 (MCP-1) provides significant antitumor efficacy. The current study was designed to evaluate the antitumor immunity of a newly developed membrane-bound form of MCP-1 (mMCP-1) in an immunocompetent mouse model of hepatocellular carcinoma (HCC). A recombinant adenovirus vector (rAd) harboring the human MCP-1 gene and the membrane-spanning domain of the CX3CL1 gene was used. Large amounts of MCP-1 protein were expressed and accumulated on the tumor cell surface. The growth of subcutaneous tumors was markedly suppressed when tumors were treated with mMCP-1, as compared with soluble MCP-1, in combination with the HSV-tk/GCV system (P<0.01). The numbers of Mac-1-, CD4-and CD8a-positive cells were significantly higher in tumor tissues (P<0.05), and tumor necrosis factor (TNF) mRNA expression levels with mMCP-1 were almost five-fold higher than those with soluble MCP-1. These results indicate that the delivery of the mMCP-1 gene greatly enhanced antitumor effects following the apoptotic stimuli by promoting the recruitment and activation of macrophages and T lymphocytes, suggesting a novel strategy of immune-based gene therapy in the treatment of patients with HCC. © 2012 Macmillan Publishers Limited All rights reserved.
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| 66.
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Honda, Masao ; Shirasaki, Takayoshi ; Shimakami, Tetsuro ; Sakai, Akito ; Horii, Rika ; Arai, Kuniaki ; Yamashita, Tatsuya ; Sakai, Yoshio ; Yamashita, Taro ; Okada, Hikari ; Nakamura, Mikiko ; Mizukoshi, Eishiro ; Kaneko, Shuichi
概要:
Pretreatment up-regulation of hepatic interferon (IFN)-stimulated genes (ISGs) has a stronger association with the treat
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ment-resistant interleukin (IL)28B minor genotype (MI; TG/GG at rs8099917) than with the treatment-sensitive IL28B major genotype (MA; TT at rs8099917). We compared the expression of ISGs in the liver and blood of 146 patients with chronic hepatitis C who received pegylated IFN and ribavirin combination therapy. Gene expression profiles in the liver and blood of 85 patients were analyzed using an Affymetrix GeneChip (Affymetrix, Santa Clara, CA). ISG expression was correlated between the liver and blood of the MA patients, whereas no correlation was observed in the MI patients. This loss of correlation was the result of the impaired infiltration of immune cells into the liver lobules of MI patients, as demonstrated by regional gene expression analysis in liver lobules and portal areas using laser capture microdissection and immunohistochemical staining. Despite having lower levels of immune cells, hepatic ISGs were up-regulated in the liver of MI patients and they were found to be regulated by multiple factors, namely, IL28A/B, IFN-λ4, and wingless-related MMTV integration site 5A (WNT5A). Interestingly, WNT5A induced the expression of ISGs, but also increased hepatitis C virus replication by inducing the expression of the stress granule protein, GTPase-activating protein (SH3 domain)-binding protein 1 (G3BP1), in the Huh-7 cell line. In the liver, the expression of WNT5A and its receptor, frizzled family receptor 5, was significantly correlated with G3BP1. Conclusions: Immune cells were lost and induced the expression of other inflammatory mediators, such as WNT5A, in the liver of IL28B minor genotype patients. This might be related to the high level of hepatic ISG expression in these patients and the treatment-resistant phenotype of the IL28B minor genotype. © 2014 by the American Association for the Study of Liver Diseases.<br />This article has Supplemental materrial and methods.
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| 67.
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Ando, Hitoshi ; Kurita, Seiichiro ; Shimizu, Akiko ; Kato, Ken-ichiro ; Ishikura, Kazuhide ; Taji, Koumei ; Uno, Masafumi ; Takeshita, Yumie ; Misu, Hirofumi ; Fujimura, Akio ; Kaneko, Shuichi ; Takamura, Toshinari
概要:
Few studies have evaluated the pharmacokinetics of rapid-acting insulin analogues in patients with Type 2 diabetes, espe
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cially under clinical conditions. The aim of the present study was to assess both the pharmacokinetics and pharmacodynamics of insulin aspart in Type 2 diabetic patients who were being treated with the analogue alone. Meal tolerance tests with and without self-injection of a customary dose of insulin aspart (0.05-0.22 U/kg) were conducted in 20 patients in a randomized cross-over study. The dose of insulin aspart (per bodyweight) was significantly correlated with both the maximum concentration (r 2 = 0.59; P < 0.01) and area under the concentration-time curve for insulin aspart (r 2 = 0.53; P < 0.01). However, the time to maximum concentration (T max), which varied widely from < 60 to ≥ 120 min, was not associated with either dosage (r 2 = 0.02; P = 0.51) or body mass index (r 2 = 0.02; P = 0.57). Injection of insulin aspart exacerbated delayed hyperinsulinaemia after meal loading, mainly in patients with T max ≥ 120 min. With regard to pharmacodynamics, insulin aspart had favourable effects on postprandial hyperglycaemia, hyperglucagonaemia and hyperlipidaemia. The T max for this insulin analogue differed greatly between individuals and delayed hyperinsulinaemia was particularly exacerbated in patients with higher T max values. Identification of the factors contributing to interindividual variation in the absorption lag time is essential for improving the efficacy and safety of insulin aspart. © 2012 The Authors. Clinical and Experimental Pharmacology and Physiology © 2012 Blackwell Publishing Asia Pty Ltd.
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| 68.
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Ohtani, Keisuke ; Usui, Soichiro ; Kaneko, Shuichi ; Takashima, Shin-ichiro ; Kitano, Katsunori ; Yamamoto, Kanako ; Okajima, Masaki ; Furusho, Hiroshi ; Takamura, Masayuki
概要:
Aldosterone is implicated in the pathogenesis of several cardiovascular diseases, including ischemia reperfusion (I/R) a
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nd myocardial infarction, and also causes oxidative stress and inflammation in cardiovascular systems. Benidipine, a long-acting T-and L-type calcium channel blocker, reduces infarct size following myocardial I/R in rabbits. Benidipine also inhibits the production of aldosterone in vitro. However, the precise mechanism of this phenomenon in vivo remains unknown. We therefore evaluated whether benedipine has a beneficial role through the regulation of oxidative stress in myocardial I/R. C57BL/6J mice were subjected to 30 min of left ascending coronary I/R. Benidipine was administered orally at 3 mg kg -1daily for 3 weeks without any changes in hemodynamic variables. Benidipine significantly reduced infarction size (13.4±2.5%) compared with controls (25.5±3.6%). Urinary 8-hydroxy-2′ deoxyguanosine (8-OHdG), a marker of oxidative DNA damage, increased significantly after I/R. I/R induced increases in 8-OHdG were significantly lower with benidipine. Local myocardial 8-OHdG was also elevated in I/R, but this augmentation was significantly suppressed with benidipine. The plasma aldosterone concentration (PAC) significantly increased 2 days after I/R and remained elevated at least 7 days after I/R. Treatment with benidipine significantly decreased I/R-induced elevation of the PAC. I/R-induced markers of fibrosis in hearts also reduced in benidipine. These results suggest that the administration of benidipine reduces myocardial infarct size as well as systemic oxidative stress after I/R. These phenomena are partially linked to reduced plasma aldosterone levels. © 2012 The Japanese Society of Hypertension All rights reserved.
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| 69.
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Takeshita, Yumie ; Takamura, Toshinari ; Minato, Hiroshi ; Misu, Hirofumi ; Ando, Hitoshi ; Yamashita, Tatsuya ; Ikeda, Hiroko ; Nakanuma, Yasuni ; Kaneko, Shuichi
概要:
金沢大学医薬保健研究域医学系<br />金沢大学医薬保健研究域医学系恒常性制御学<br />Multiple liver metastases were incidentally detected in the lobe of the li
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ver of an 81-year-old woman following total thyroidectomy and ablative radioactive iodine administration for the treatment of papillary thyroid carcinoma. A biopsy specimen taken from the metastatic liver tumor was histologically diagnosed as anaplastic carcinoma. Immunohistochemical staining for p53 was positive in both the primary tumor and liver biopsy specimens. We considered this to have been caused by anaplastic transformation from papillary thyroid carcinoma during treatment. We report a rare case of multiple liver metastases from a papillary thyroid carcinoma, which we believe to be the result of anaplastic transformation during postoperative radioactive iodine-131 therapy. © 2008 The Japanese Society of Internal Medicine.
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| 70.
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Hara, Akinori ; Wada, Takashi ; Kitajima, Shinji ; Toyama, Tadashi ; Okumura, Toshiya ; Kitagawa, Kiyoki ; Iwata, Yasunori ; Sakai, Norihiko ; Furuichi, Kengo ; Higuchi, Masato ; Kaneko, Shuichi
概要:
金沢大学医薬保健研究域医学系<br />A 42-year-old woman with systemic lupus erythematosus was admitted to our hospital because of severe
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anemia. Her bone marrow was almost normocellular and erythroblasts were nearly absent. Laboratory data showed elevated levels of lactate dehydrogenase and positive findings on Coombs' tests. On the basis of these findings, her anemia was diagnosed as the overlap of pure red cell aplasia with autoimmune hemolytic anemia. Radioimmunoprecipitation assay revealed that her serum was positive for anti-erythropoietin antibodies before therapy. Furthermore, the autoantibodies inhibited proliferation of an erythropoietin-dependent cell line in a dose-dependent manner. Immunosuppressive treatment improved the anemia accompanied with disappearance of the autoantibodies. © 2008 Wiley-Liss, Inc.
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| 71.
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Kita, Yuki ; Takamura, Toshinari ; Misu, Hirofumi ; Ota, Tsuguhito ; Kurita, Seiichiro ; Takeshita, Yumie ; Uno, Masafumi ; Matsuzawa-Nagata, Naoto ; Kato, Ken-ichiro ; Ando, Hitoshi ; Fujimura, Akio ; Hayashi, Koji ; Kimura, Toru ; Ni, Yinhua ; Otoda, Toshiki ; Miyamoto, Ken-ichi ; Zen, Yoh ; Nakanuma, Yasuni ; Kaneko, Shuichi
概要:
Background: Optimal treatment for nonalcoholic steatohepatitis (NASH) has not yet been established, particularly for ind
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ividuals without diabetes. We examined the effects of metformin, commonly used to treat patients with type 2 diabetes, on liver pathology in a non-diabetic NASH mouse model. Methodology/Principal Findings: Eight-week-old C57BL/6 mice were fed a methionine- and choline-deficient plus high fat (MCD+HF) diet with or without 0.1% metformin for 8 weeks. Co-administration of metformin significantly decreased fasting plasma glucose levels, but did not affect glucose tolerance or peripheral insulin sensitivity. Metformin ameliorated MCD+HF diet-induced hepatic steatosis, inflammation, and fibrosis. Furthermore, metformin significantly reversed hepatic steatosis and inflammation when administered after the development of experimental NASH. Conclusions/Significance: These histological changes were accompanied by reduced hepatic triglyceride content, suppressed hepatic stellate cell activation, and the downregulation of genes involved in fatty acid metabolism, inflammation, and fibrogenesis. Metformin prevented and reversed steatosis and inflammation of NASH in an experimental non-diabetic model without affecting peripheral insulin resistance. © 2012 Kita et al.
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| 72.
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Mizukoshi, Eishiro ; Fushimi, Kazumi ; Arai, Kuniaki ; Yamashita, Tatsuya ; Honda, Masao ; Kaneko, Shuichi
概要:
Background & Aims: Chondroitin-glucuronate C5-epimerase is an enzyme that converts D-glucuronic acid to L-iduronic acid
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residues in dermatan sulphate biosynthesis. It is also identified to be a tumour-associated antigen recognized by cytotoxic T cells (CTLs) and its enhanced expression in many cancers has been reported. In the present study, we investigated the usefulness of this molecule as an immunotherapeutic target in hepatocellular carcinoma (HCC). Methods: The expression of chondroitin-glucuronate C5-epimerase in hepatoma cell lines and HCC tissues was confirmed by immunofluorescence and immunohistochemical analysis. CTL responses were investigated by several immunological techniques using peripheral blood mononuclear cells (PBMCs) or tumour-infiltrating lymphocytes. To determine the safety of immunotherapy using chondroitin-glucuronate C5-epimerase-derived peptide, 12 patients with HCC were administered s.c. vaccinations of the peptides and analysed. Results: Chondroitin-glucuronate C5-epimerase was expressed in HCC cell lines and human tissues including alpha-foetoprotein (AFP)-negative individuals. Chondroitin-glucuronate C5-epimerase-specific CTLs could be generated by stimulating PBMCs of HCC patients with peptides and they showed cytotoxicity against HCC cells expressing the protein. The frequency of CTL precursors investigated by enzyme-linked immunospot (ELISPOT) assay was 0-34 cells/3 × 10 5 PBMCs and the infiltration of interferon-gamma-producing CTLs into the tumour site was confirmed. In the vaccination study, no severe adverse events were observed and the peptide-specific CTLs were induced in 4 of 12 patients tested. Conclusions: Chondroitin-glucuronate C5-epimerase is a potential candidate for tumour antigen with immunogenicity and the peptides derived from this antigen could be useful in HCC immunotherapy. © 2012 John Wiley & Sons A/S.
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| 73.
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Kato, Ken-ichiro ; Takamura, Toshinari ; Takeshita, Yumie ; Ryu, Yasuji ; Misu, Hirofumi ; Ota, Tsuguhito ; Tokuyama, Kumpei ; Nagasaka, Shoichiro ; Matsuhisa, Munehide ; Matsui, Osamu ; Kaneko, Shuichi
概要:
Objective: The aim of this study was to examine the association between ectopic fat and organ-specific insulin resistanc
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e (IR) in insulin-target organs in patients with nonalcoholic fatty liver disease (NAFLD). Methods: Organ-specific IR in the liver (hepatic glucose production (HGP)6fasting plasma insulin (FPI) and suppression of HGP by insulin [%HGP]), skeletal muscle (insulin-stimulated glucose disposal [Rd]), and adipose tissue (suppression of FFA by insulin [%FFA]) was measured in 69 patients with NAFLD using a euglycemic hyperinsulinemic clamp with tracer infusion ([6,6-2H 2]glucose). Liver fat, intramyocellular lipid (IMCL), and body composition were measured by liver biopsy, proton magnetic resonance spectroscopy, and bioelectrical impedance analysis, respectively. Results: HGPxFPI was significantly correlated with Rd (r = -0.57, P<0.001), %HGP with %FFA (r = 0.38, P<0.01), and Rd with %FFA (r = 0.27, P<0.05). Liver steatosis score was negatively associated with Rd (r = -0.47, P<0.001) as well as with HGPxFPI ( r = 0.43, P<0.001). Similarly, intrahepatic lipid was negatively associated with Rd (r = -0.32, P<0.05). IMCL was not associated with Rd (r = -0.16, P = 0.26). Fat mass and its percentage were associated with HGPxFPI (r = 0.50, P<0.001; r = 0.48, P<0.001, respectively) and Rd (r = -0.59, P<0.001; r = -0.52, P<0.001, respectively), but not with %FFA (r = -0.21, P = 0.10; r = -0.001, P = 0.99, respectively). Conclusion: Unexpectedly, fat accumulation in the skeletal muscle and adipose tissue was not associated with organ-specific IR. Instead, liver fat was associated not only with hepatic IR but also with skeletal muscle IR, suggesting a central role of fatty liver in systemic IR and that a network exists between liver and skeletal muscle. © 2014 Kato et al.
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| 74.
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金子, 周一 ; Kaneko, Shuichi
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| 75.
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Lan, Fei ; Misu, Hirofumi ; Chikamoto, Keita ; Takayama, Hiroaki ; Kikuchi, Akihiro ; Mohri, Kensuke ; Takata, Noboru ; Hayashi, Hiroto ; Matsuzawa-Nagata, Naoto ; Takeshita, Yumie ; Noda, Hiroyo ; Matsumoto, Yukako ; Ota, Tsuguhito ; Nagano, Toru ; Nakagen, Masatoshi ; Miyamoto, Ken-ichi ; Takatsuki, Kanako ; Seo, Toru ; Iwayama, Kaito ; Tokuyama, Kunpei ; Matsugo, Seiichi ; Tang, Hong ; Saito, Yoshiro ; Yamagoe, Satoshi ; Kaneko, Shuichi ; Takamura, Toshinari
概要:
Recent articles have reported an association between fatty liver disease and systemic insulin resistance in humans, but
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the causal relationship remains unclear. The liver may contribute to muscle insulin resistance by releasing secretory proteins called hepatokines. Here we demonstrate that leukocyte cell-derived chemotaxin 2 (LECT2), an energy-sensing hepatokine, is a link between obesity and skeletal muscle insulin resistance. Circulating LECT2 positively correlated with the severity of both obesity and insulin resistance in humans. LECT2 expression was negatively regulated by starvation-sensing kinase adenosine monophosphate-activated protein kinase in H4IIEC hepatocytes. Genetic deletion of LECT2 in mice increased insulin sensitivity in the skeletal muscle. Treatment with recombinant LECT2 protein impaired insulin signaling via phosphorylation of Jun NH2-terminal kinase in C2C12 myocytes. These results demonstrate the involvement of LECT2 in glucose metabolism and suggest that LECT2 may be a therapeutic target for obesity-associated insulin resistance. © 2014 by the American Diabetes Association.
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| 76.
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Toyama, Tadashi ; Shimizu, Miho ; Furuichi, Kengo ; Kaneko, Shuichi ; Wada, Takashi ; 清水, 美保 ; 古市, 賢吾 ; 金子, 周一 ; 和田, 隆志
概要:
Recent epidemiological research revealed that dyslipidemia is a risk factor for development and progression of diabetic
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nephropathy. Results from interventional studies revealed the possibility that anti-hyperlipidemic agents have a better effect on diabetic nephropathy through improvement of albuminuria and loss of renal function. In addition, dyslipidemia may be a consequence of albuminuria and renal dysfunction, thereby perpetuating kidney damage. Today, the proportion of diabetic patients receiving statins is increasing due to their beneficial effect on cardiovascular mortality. However, treatment for patients should be determined based on consideration of the risk and benefit of the treatment. More insight into the pathogenesis of diabetic nephropathy and the effects of life-style changes is required. © 2013 Japanese Society of Nephrology.
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| 77.
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Kawaguchi, Kazunori ; Honda, Masao ; Yamashita, Taro ; Okada, Hikari ; Shirasaki, Takayoshi ; Nishikawa, Masashi ; Nio, Kouki ; Arai, Kuniaki ; Sakai, Yoshio ; Yamashita, Tatsuya ; Mizukoshi, Eishiro ; Kaneko, Shuichi
概要:
Notch signaling abnormalities are reported to be involved in the acceleration of malignancy in solid tumors and stem cel
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l formation or regeneration in various organs. We analyzed specific genes for DNA copy number variations in liver cancer cells and investigated whether these factors relate to clinical outcome. Chromosome 20p, which includes the ligand for Notch pathways, Jagged1, was found to be amplified in several types of hepatoma cells, and its mRNA was up-regulated according to α-fetoprotein gene expression levels. Notch inhibition using Jagged1 shRNA and γ-secretase inhibitors produced significant suppression of cell growth in α-fetoprotein–producing cells with suppression of downstream genes. Using in vivo hepatoma models, the administration of γ-secretase inhibitors resulted in reduced tumor sizes and effective Notch inhibition with widespread apoptosis and necrosis of viable tumor cells. The γ-secretase inhibitors suppressed cell growth of the epithelial cell adhesion molecule–positive fraction in hepatoma cells, indicating that Notch inhibitors could suppress the stem cell features of liver cancer cells. Even in clinical liver cancer samples, the expression of α-fetoprotein and Jagged1 showed significant correlation, and amplification of the copy number of Jagged1 was associated with Jagged1 mRNA expression and poor survival after liver cancer surgical resection. In conclusion, amplification of Jagged1 contributed to mRNA expression that activates the Jagged1-Notch signaling pathway in liver cancer and led to poor outcome. © 2016 American Society for Investigative Pathology<br />Embargo Period 12 months
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| 78.
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Terashima, Takeshi ; Yamashita, Tatsuya ; Arai, Kuniaki ; Sunagozaka, Hajime ; Kitahara, Masaaki ; Nakagawa, Hidetoshi ; Kagaya, Takashi ; Mizukoshi, Eishiro ; Honda, Masao ; Kaneko, Shuichi
概要:
Aim: Sorafenib is the standard treatment for advanced hepatocellular carcinoma (HCC). However, although there is no prov
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en therapeutic procedure following the termination of sorafenib, hepatic arterial infusion chemotherapy (HAIC) may be a treatment option in advanced HCC. The aim of this study was to evaluate feasibility and efficacy of HAIC for patients with advanced HCC as subsequent therapy. Methods: We retrospectively evaluated 27 consecutive patients with advanced HCC who were treated with HAIC following sorafenib between June 2009 and December 2012 at our hospital. Cisplatin (20 mg/m2 per day) was administered via the hepatic artery for 10 min, prior to the continuous administration of 5-fluorouracil (330 mg/m2 per day) over 24 h from days 1-5 and 8-12 and the s.c. administration of pegylated interferon α-2b (1 μg/kg) on days 1, 8, 15, and 22. A treatment cycle consisted of 28 days of drug administration followed by 14 days of rest. Results: The toxicity profile showed that hematological toxicities were common, and grade 3/4 neutropenia and thrombocytopenia were observed (51.9% and 48.1%, respectively). Five patients (18.5%) experienced device-related complications. No unexpected adverse reactions and no treatmentrelated deaths were observed. Partial response was obtained in eight patients (29.6%), and stable disease was noted in nine patients (33.3%). Median progression-free survival and median survival time from initiation of HAIC were 4.0 and 7.6 months, respectively. Conclusions: Because HAIC was well tolerated and exhibited moderate antitumor activity, it is a potentially useful treatment procedure in patients with advanced HCC even after failure of sorafenib.
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| 79.
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Ishikura, Kazuhide ; Misu, Hirofumi ; Kumazaki, Masafumi ; Takayama, Hiroaki ; Matsuzawa-Nagata, Naoto ; Tajima, Natsumi ; Chikamoto, Keita ; Lan, Fei ; Ando, Hitoshi ; Ota, Tsuguhito ; Sakurai, Masaru ; Takeshita, Yumie ; Kato, Kenichiro ; Fujimura, Akio ; Miyamoto, Ken-ichi ; Saito, Yoshiro ; Kameo, Satomi ; Okamoto, Yasuo ; Takuwa, Yoh ; Takahashi, Kazuhiko ; Kidoya, Hiroyasu ; Takakura, Nobuyuki ; Kaneko, Shuichi ; Takamaura, Toshinari
概要:
Aims/hypothesis Impaired angiogenesis induced by vascular endothelial growth factor (VEGF) resistance is a hallmark of v
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ascular complications in type 2 diabetes; however, its molecular mechanism is not fully understood. We have previously identified selenoprotein P (SeP, encoded by the SEPP1 gene in humans) as a liver-derived secretory protein that induces insulin resistance. Levels of serum SeP and hepatic expression of SEPP1 are elevated in type 2 diabetes. Here, we investigated the effects of SeP on VEGF signalling and angiogenesis. Methods We assessed the action of glucose on Sepp1 expression in cultured hepatocytes. We examined the actions of SeP on VEGF signalling and VEGF-induced angiogenesis in HUVECs. We assessed wound healing in mice with hepatic SeP overexpression or SeP deletion. The blood flow recovery after ischaemia was also examined by using hindlimb ischaemia model with Sepp1-heterozygous-knockout mice. Results Treatment with glucose increased gene expression and transcriptional activity for Sepp1 in H4IIEC hepatocytes. Physiological concentrations of SeP inhibited VEGF-stimulated cell proliferation, tubule formation and migration in HUVECs. SeP suppressed VEGF-induced reactive oxygen species (ROS) generation and phosphorylation of VEGF receptor 2 (VEGFR2) and extracellular signal-regulated kinase 1/2 (ERK1/2) in HUVECs. Wound closure was impaired in the mice overexpressing Sepp1, whereas it was improved in SeP-/-mice. SeP+/-mice showed an increase in blood flow recovery and vascular endothelial cells after hindlimb ischaemia. Conclusions/interpretation The hepatokine SeP may be a novel therapeutic target for impaired angiogenesis in type 2 diabetes. © 2014 Springer-Verlag Berlin Heidelberg.
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| 80.
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Yaegashi, Takanori ; Furusho, Hiroshi ; Chikata, Akio ; Usui, Soichiro ; Kaneko, Shuichi ; Yamagishi, Masakazu ; Takamura, Masayuki
概要:
Introduction. Right ventricular septal pacing is thought to be better than right ventricular apical pacing for shortenin
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g the QRS duration and for preserving left ventricular function. However, right ventricular septal pacing may not be effective in all cases. In this case report, we present a rare case in which right ventricular septal pacing induced thoroughly separated right and left ventricular excitation despite the presence of a relatively narrow QRS wave during atrium-only pacing. Case presentation. We report a case of 63-year-old Japanese man with cardiomyopathy with an implantable cardioverter defibrillator placement for ventricular tachycardia. Three years after implantation, he developed second-degree atrio-ventricular block. Therefore, atrio-ventricular sequential pacing was started; then his heart failure was much worsened. His electrocardiogram showed a dissociated biphasic QRS wave during right ventricular high-septal pacing, despite the presence of a non-fragmented QRS morphology during atrium-only pacing. An activation map during right ventricular high-septal pacing showed that right ventricular conduction started at the pacing site and ended at the right ventricular basal inferior site. Subsequently after a 10ms interval, left ventricular conduction started at the left ventricular posteroseptum and ended at the left ventricular lateral wall. These data indicate that during right ventricular high-septal pacing, the first component of the QRS wave supposedly reflects only right ventricular excitation and the second component only left ventricular excitation. Also due to the intracardiac electrograms, it was assumed that this phenomenon was caused by transversely limited severe transseptal conduction disturbance. Conclusion: It should be noted that even ventricular septal pacing could evoke harmful interventricular dyssynchrony due to transversely limited severe septal conduction disturbance, despite the presence of a relatively narrow QRS wave. © 2014 Yaegashi et al.; licensee BioMed Central Ltd.
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| 81.
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Kitahara, Masaaki ; Mizukoshi, Eishiro ; Nakamoto, Yasunari ; Mukaida, Naofumi ; Matsushima, Kouji ; Kaneko, Shuichi
概要:
Background & aims Immunotherapy using dendritic cells (DCs) is a promising cancer therapy. The success of this therapy d
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epends on the function of induced DCs. However, there has been no consensus on optimal conditions for DC preparation in vitro for immunotherapy of hepatocellular carcinoma (HCC) patients. To address relevant issues, we evaluated the procedures to induce DCs that efficiently function in hepatitis C virus (HCV)-related HCC. Methods We studied immunological data from 14 HCC patients. The DC preparation and the surface markers were assessed by flow cytometric analysis. Four different additional activation stimuli (Method I, medium alone; Method II, with OK-432; Method III, with IL-1β + IL-6 + TNF-α; Method IV, with IL-1β + IL-6 + TNF-α + PGE2) were tested and the functions of DCs were confirmed by examination of the ability of phagocytosis, cytokine production and allogeneic mixed lymphocyte reaction (MLR). Results The numbers of DCs induced and their cytokine production ability were not different between healthy controls and HCC patients. T-cell stimulatory activity of DCs in MLR was significantly lower in HCC patients than in healthy controls. The maturation of DCs with OK-432 boosted production of cytokines and chemokines, such as IL-2, IL-12p70, IFN-γ, TNF-α, IL-13 and MIP1α, and restored T-cell stimulatory activity of DCs in MLR. Conclusions The clinically approved compound OK-432 is a candidate for highly immunocompetent DC preparation and may be considered as a key drug for immunotherapy of HCV-related HCC patients. © 2014 Published by Elsevier B.V.
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| 82.
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Terashima, Takeshi ; Mizukoshi, Eishiro ; Arai, Kuniaki ; Yamashita, Tatsuya ; Yoshida, Mariko ; Ota, Hajime ; Onishi, Ichiro ; Kayahara, Masato ; Ohtsubo, Koushiro ; Kagaya, Takashi ; Honda, Masao ; Kaneko, Shuichi
概要:
Cancer vaccine therapy is one of the most attractive therapies as a new treatment procedure for pancreatic adenocarcinom
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a. Recent technical advances have enabled the identification of cytotoxic T lymphocyte (CTL) epitopes in various tumor-associated antigens (TAAs). However, little is known about which TAA and its epitope are the most immunogenic and useful for a cancer vaccine for pancreatic adenocarcinoma. We examined the expression of 17 kinds of TAA in 9 pancreatic cancer cell lines and 12 pancreatic cancer tissues. CTL responses to 23 epitopes derived from these TAAs were analyzed using enzyme-linked immunospot (ELISPOT), CTL, and tetramer assays in 41 patients, and factors affecting the immune responses were investigated. All TAAs were frequently expressed in pancreatic adenocarcinoma cells, except for adenocarcinoma antigens recognized by T cells 1, melanoma-associated antigen (MAGE)-A1, and MAGE-A3. Among the epitopes recognized by CTLs in more than two patients in the ELISPOT assay, 6 epitopes derived from 5 TAAs, namely, MAGE-A3, p53, human telomerase reverse transcriptase (hTERT), Wilms tumor (WT)-1, and vascular endothelial growth factor receptor (VEGFR)2, could induce specific CTLs that showed cytotoxicity against pancreatic cancer cell lines. The frequency of lymphocyte subsets correlated well with TAA-specific immune response. Overall survival was significantly longer in patients with TAA-specific CTL responses than in those without. P53, hTERT, WT-1, and VEGFR2 were shown to be attractive targets for immunotherapy in patients with pancreatic adenocarcinoma, and the induction of TAA-specific CTLs may improve the prognosis of these patients. © 2014 Springer-Verlag Berlin Heidelberg.
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| 83.
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Kato, Takeshi ; Sekiguchi, Akiko ; Sagara, Koichi ; Tanabe, Hiroaki ; Takamura, Masayuki ; Kaneko, Shuichi ; Aizawa, Tadanori ; Fu, Long-Tai ; Yamashita, Takeshi
概要:
Background: Atrial fibrosis is a hallmark of atrial structural remodeling leading to the persistence of atrial fibrillat
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ion. Although fibroblasts play a major role in atrial fibrosis, their source in the adult atrium is unclear. We tested the hypothesis that endothelial cells contribute to fibroblast accumulation through an endothelial-mesenchymal transition in the atrium of patients with atrial fibrillation. Methods and results: The study group consisted of patients with atrial fibrillation and valvular disease or atrial septal defect who underwent left atrial appendectomy during cardiac surgery (n =38). The amount of fibrotic depositions in the left atrium positively correlated with left atrial dimension. Furthermore, snail and S100A4, indicative of endothelial-mesenchymal transition, were quantified in the left atrium using western blot analysis, which showed statistically significant correlations with left atrial dimension. Immunofluorescence assay of the left atrial tissue identified snail and S100A4 being expressed within the endocardium which is composed of CD31+ cells. The snail-positive endocardium also showed the expression of membrane type 1-matrix metalloproteinase. Immunofluorescence multi-labeling experiments identified that heat shock protein 47, prolyl-4-hydroxylase, and procollagen type 1 co-localized with snail and S100A4 within the endothelial cells of the left atrium, indicating the mesenchymal phenotype to produce collagen. Conclusions: In this study, we showed that the endothelial-mesenchymal transition occurs in the atrium of patients with atrial fibrillation. This observation should help in constructing a novel therapeutic approach for preventing atrial structural remodeling. © 2016 Japanese College of Cardiology.
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| 84.
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Kato, Ken-ichiro ; Takeshita, Yumie ; Misu, Hirofumi ; Zen, Yoh ; Kaneko, Shuichi ; Takamura, Toshinari
概要:
Aims/Introduction: To examine the association between liver histological features and organ-specific insulin resistance indices calculated from 75-g oral glucose tolerance test data in patients with non-alcoholic fatty liver disease.
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Materials and Methods: Liver biopsy specimens were obtained from 72 patients with non-alcoholic fatty liver disease, and were scored for steatosis, grade and stage. Hepatic and skeletal muscle insulin resistance indices (hepatic insulin resistance index and Matsuda index, respectively) were calculated from 75-g oral glucose tolerance test data, and metabolic clearance rate was measured using the euglycemic hyperinsulinemic clamp method. Results: The degree of hepatic steatosis, and grade and stage of non-alcoholic steatohepatitis were significantly correlated with Matsuda index (steatosis r = -0.45, P < 0.001; grade r = -0.54, P < 0.001; stage r = -0.37, P < 0.01), but not with hepatic insulin resistance index. Multiple regression analyses adjusted for age, sex, body mass index and each histological score showed that the degree of hepatic steatosis (coefficient = -0.22, P < 0.05) and grade (coefficient = -0.40, P < 0.01) were associated with Matsuda index, whereas the association between stage and Matsuda index (coefficient = -0.07, P = 0.593) was no longer significant. A similar trend was observed for the association between steatosis and metabolic clearance rate (coefficient = -0.62, P = 0.059). Conclusions: Liver steatosis is associated with insulin resistance in skeletal muscle rather than in the liver in patients with non-alcoholic fatty liver disease, suggesting a central role of fatty liver in the development of peripheral insulin resistance and the existence of a network between the liver and skeletal muscle.
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| 85.
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Oishi, Naoki ; Shilagardi, Khurts ; Nakamoto, Yasunari ; Honda, Masao ; Kaneko, Shuichi ; Murakami, Seishi
概要:
医薬保健研究域医学系<br />Chronic infection with hepatitis B virus (HBV) is a major risk factor for hepatocellular carcinoma. The
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HBV X protein (HBx) is thought to have oncogenic potential, although the molecular mechanism remains obscure. Pathological roles of HBx in the carcinogenic process have been examined using rodent systems and no report is available on the oncogenic roles of HBx in human cells in vitro. We therefore examined the effect of HBx on immortalization and transformation in human primary cells. We found that HBx could overcome active RAS-induced senescence in human immortalized cells and that these cells could form colonies in soft agar and tumors in nude mice. HBx alone, however, could contribute to neither immortalization nor transformation of these cells. In a population doubling analysis, an N-terminal truncated mutant of HBx, HBx-D1 (amino acids 51-154), which harbors the coactivation domain, could overcome active RAS-induced cellular senescence, but these cells failed to exhibit colonigenic and tumorigenic abilities, probably due to the low expression level of the protein. By scanning a HBx expression library of the clustered-alanine substitution mutants, the N-terminal domain was found to be critical for overcoming active RAS-induced senescence by stabilizing full-length HBx. These results strongly suggest that HBx can contribute to carcinogenesis by overcoming active oncogene-induced senescence. © 2007 Japanese Cancer Association.
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| 86.
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Mizukoshi, Eishiro ; Yamashita, Tatsuya ; Arai, Kuniaki ; Terashima, Takeshi ; Kitahara, Masaaki ; Nakagawa, Hidetoshi ; Iida, Noriho ; Fushimi, Kazumi ; Kaneko, Shuichi
概要:
Hepatic arterial infusion chemotherapy (HAIC) has been employed as an alternative therapy to sorafenib for the patients
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with advanced hepatocellular carcinoma (HCC). In this study, we performed a comparative analysis of various immune cell responses including tumor-associated antigen (TAA)-specific T cells, regulatory T cells (Tregs) and myeloid-derived suppressor cells (MDSCs) in advanced HCC patients treated with HAIC. Thirty-six HCC patients were examined in the study. Interferon gamma enzyme-linked immunospot assays were performed to examine the frequency of TAA-specific T cells. The frequencies of Tregs and MDSCs were examined by multicolor fluorescence-activated cell sorting analysis. The treatment with HAIC using interferon (IFN)/5-fluorouracil (FU) or IFN/FU + cisplatin modulated the frequencies of various immune cells. In 22.2 % of patients, the frequency of TAA-specific T cells increased after HAIC. Although the frequency of Tregs decreased after HAIC, it was not associated with the prognosis of patients. An analysis of prognostic factors for overall survival identified diameter of the tumor (<3.0 cm), absence of major portal vein invasion, absence of distant metastasis, Union Internationale Contre Le Cancer tumor lymph node metastasis stage (I or II), neutrophil lymphocytic ratio (<2.1) and the frequency of MDSCs (<30.5 %) as factors that prolonged overall survival time after HAIC. Even in the group adjusted with progressive levels of tumors, patients with a low frequency of MDSCs had a significantly longer overall survival time. In conclusion, the frequency of MDSCs before the treatment is a prognostic factor in HAIC against HCC. © 2016 Springer-Verlag Berlin Heidelberg
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| 87.
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Katsuki, Tomonori ; Furusho, Hiroshi ; Kusayama, Takashi ; Takashima, Shinichiro ; Kato, Takeshi ; Murai, Hisayoshi ; Usui, Soichiro ; Kaneko, Shuichi ; Takamura, Masayuki
概要:
Many Riata (St. Jude Medical, St. Paul, MN, USA) implantable cardioverter defibrillator (ICD) leads have reportedly deve
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loped cable externalization. The most likely cause of cable externalization is insulation abrasion, which often occurs at the can or between the right ventricular coil and superior vena cava (SVC) coil. We report a rare case of an adult male whose ICD lead cable was externalized at the proximal portion of the SVC coil. This lead became fixed to the wall at the subclavian vein and SVC and became bent between these adhesions. Furthermore, the motion of this lead was affected by pulsation of the aortic arch. The ICD lead might develop inside-out abrasion due to mechanical stress evoked by pulsation of the aortic arch at this site.<. Learning objective: Cable externalization of the implantable cardioverter defibrillator lead at the proximal portion of the superior vena cava (SVC) coil has rarely been reported. Externalization might be the result of deformation of the left brachiocephalic vein and the anatomical relationship with the aortic arch. The anatomical pathway of the lead should be carefully considered during the procedure, especially when a dual-coil lead is selected. Moreover, possible cable externalization at both the proximal and distal portions of the SVC coil should be kept in mind during follow-up>. © 2016 Japanese College of Cardiology.<br />Embargo Period 12 months
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| 88.
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Ni, Yinhua ; Nagashimada, Mayumi ; Zhuge, Fen ; Zhan, Lili ; Nagata, Naoto ; Tsutsui, Akemi ; Nakanuma, Yasuni ; Kaneko, Shuichi ; Ota, Tsuguhito
概要:
Hepatic insulin resistance and nonalcoholic steatohepatitis (NASH) could be caused by excessive hepatic lipid accumulation and peroxidation. Vitamin E has become a standard treatment for NASH. However, astaxanthin, an antioxidant
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carotenoid, inhibits lipid peroxidation more potently than Vitamin E. Here, we compared the effects of astaxanthin and Vitamin E in NASH. We first demonstrated that astaxanthin ameliorated hepatic steatosis in both genetically (ob/ob) and high-fat-diet-induced obese mice. In a lipotoxic model of NASH: mice fed a high-cholesterol and high-fat diet, astaxanthin alleviated excessive hepatic lipid accumulation and peroxidation, increased the proportion of M1-type macrophages/Kupffer cells, and activated stellate cells to improve hepatic inflammation and fibrosis. Moreover, astaxanthin caused an M2-dominant shift in macrophages/Kupffer cells and a subsequent reduction in CD4+ and CD8+ T cell recruitment in the liver, which contributed to improved insulin resistance and hepatic inflammation. Importantly, astaxanthin reversed insulin resistance, as well as hepatic inflammation and fibrosis, in pre-existing NASH. Overall, astaxanthin was more effective at both preventing and treating NASH compared with Vitamin E in mice. Furthermore, astaxanthin improved hepatic steatosis and tended to ameliorate the progression of NASH in biopsy-proven human subjects. These results suggest that astaxanthin might be a novel and promising treatment for NASH.
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| 89.
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Mizukoshi, Eishiro ; Nakagawa, Hidetoshi ; Kitahara, Masaaki ; Yamashita, Tatsuya ; Arai, Kuniaki ; Sunagozaka, Hajime ; Iida, Noriho ; Fushimi, Kazumi ; Kaneko, Shuichi
概要:
Multidrug resistance-associated protein 3 (MRP3) is a carrier-type transport protein belonging to the ABC transporters.
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In this study, we investigated the safety and immunogenicity of a MRP3-derived peptide (MRP3765) as a vaccine and characterized the MRP3-specific T cell responses induced. Twelve hepatocellular carcinoma (HCC) patients treated with hepatic arterial infusion chemotherapy (HAIC) were enrolled. The MRP3-derived peptide was emulsified in incomplete Freund's adjuvant and administered via subcutaneous immunization three times weekly. No serious adverse drug reactions to the peptide vaccine were observed, and the vaccination was well tolerated. The vaccination induced MRP3-specific immunity in 72.7% of the patients. In a phenotypic analysis, the largest post-vaccinated increase in MRP3-specific T cells was due to an increase in cells with the effector memory phenotype. Among the 12 patients, one patient showed a partial response, nine showed a stable disease, and two showed a progressive disease. The median overall survival time was 14.0 months. In conclusion, the safety, effects of immune boosting, and possible prolongation of overall survival by the MRP3-derived peptide demonstrate the potential of the peptide to provide clinical benefit in HCC patients. © 2015.
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| 90.
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Kuroda, Kaori ; Takeshita, Yumie ; Kaneko, Shuichi ; Takamura, Toshinari
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| 91.
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Toyama, Tadashi ; Furuichi, Kengo ; Shimizu, Miho ; Hara, Akinori ; Iwata, Yasunori ; Sakai, Norihiko ; Perkovic, Vlado ; Kobayashi, Makoto ; Mano, Toshiki ; Kaneko, Shuichi ; Wada, Takashi
概要:
Background: Some observational studies have shown the relationships between hyperuricemia and chronic kidney disease (CK
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D); however, the threshold of serum uric acid (SUA) for deterioration of kidney function and the association between SUA and kidney injury by baseline kidney function remains unclear. This study aimed to clarify the relationships between SUA and reduced kidney function. Methods: We analyzed a historical cohort of male Japanese individuals who underwent medical checkup between 1998 and 2007. Participants with baseline data and who were followed up for at least one year were included and stratified according to baseline kidney function. Kidney function was classified as normal [estimated glomerular filtration rate (eGFR) ≥ 90 ml/min/1.73 m2] or mildly reduced (eGFR 60-89 ml/min/1.73 m2). The outcome measured was kidney impairment defined as a decrease in eGFR to < 60 ml/min/1.73 m2. Associations between SUA and risk for outcome and eGFR slopes were assessed. Results: A total of 41632 subjects with mean age 45.4 years were included. During a mean follow-up of four years, 3186 (7.6%) subjects developed kidney dysfunction. Subjects with SUA ≥ 6.0 mg/dL had a significantly increased risk for kidney impairment compared with subjects with SUA of 4-4.9 mg/dL. SUA threshold levels were different according to baseline kidney function; SUA ≤ 7.0 and ≤ 6.0 mg/dL for normal and mildly reduced kidney function, respectively. Approximately the same trends were observed for eGFR slopes. Conclusion: In the general population, hyperuricemia appears to be a risk factor for kidney impairment in males. For participants with mild kidney dysfunction, even a slight elevation of SUA can be a risk factor. Copyright: © 2015 Toyama et al.<br />This article has a supplementary figure. Please see the last page of the text.
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| 92.
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論文
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Terashima, Takeshi ; Yamashita, Tatsuya ; Takata, Noboru ; Nakagawa, Hidetoshi ; Toyama, Tadashi ; Arai, Kuniaki ; Kitamura, Kazuya ; Yamashita, Taro ; Sakai, Yoshio ; Mizukoshi, Eishiro ; Honda, Masao ; Kaneko, Shuichi
概要:
Aim: Although sorafenib is a standard drug for advanced hepatocellular carcinoma (HCC), little is known about a patient'
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s clinical course after treatment. We investigated the effect of post-progression survival (PPS) and progression-free survival (PFS) on overall survival (OS) in patients whose advanced HCC was treated by sorafenib. Methods: We searched in the PubMed database for reports with survival data of patients with HCC treated with sorafenib monotherapy, and selected reports with 20 or more patients each that provided data for both OS and PFS or time to progression (TTP). Median PPS (mPPS) was defined as the period obtained by subtracting median PFS or TTP (mPFS/TTP) from median OS (mOS). We identified 56 reports with 5803 patients. We investigated the correlation of mOS and either mPPS or mPFS/TTP using weighted linear regression. Results: Median PPS correlated with mOS (r=0.834) very strongly, whereas mPFS/TTP did not correlate with mOS as highly as PPS did (r=0.546). When we stratified survival data by Child-Pugh classification, a significantly greater average percentage of mPPS to mOS was seen in Child-Pugh class A (54.4±17.6%) than in Child-Pugh class B (32.0±11.6%) (P=0.015). Conclusion: PPS highly correlated with OS, and its importance should be more emphasized for advanced HCC patients treated after sorafenib therapy, whereas we need to take more care in interpreting the results of PFS to evaluate treatment efficacy in clinical trials of advanced HCC. © 2015 The Japan Society of Hepatology.<br />Embargo Period 12 months
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| 93.
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Mizukoshi, Eishiro ; Kaneko, Shuichi
概要:
Hepatocellular carcinoma (HCC) is the sixth most common type of cancer globally. Although many different kinds of treatm
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ent are performed for HCC according to the practical guidelines, the prognosis of patients is not still satisfactory because the effects of treatments are limited for advanced tumors and the recurrence rate of HCC, even in early stages, is very high. Therefore, immunotherapy is highly anticipated as a new treatment method for HCC. For the development of a new HCC therapy, we attempted to establish immunotherapy using dendritic cells (DCs) and peptide vaccine. In several clinical trials that we performed, we confirmed that the immunotherapy was safe and well-tolerated by HCC patients. We observed that DC therapy prolonged the recurrence-free survival of patients compared with that of patients without DC infusion, as well as observing the radiological anti-tumor effect in HCC patients with peptide vaccine. In this chapter, we summarize the results of previous studies using DC and peptide vaccine, including our own data, and describe the prospects of immunotherapy for HCC. © 2015, Springer Japan. All rights reserved.<br />[Book Chapter]
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| 94.
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Isobe, Yuki ; Sakurai, Masaru ; Kita, Yuki ; Takeshita, Yumie ; Misu, Hirofumi ; Kaneko, Shuichi ; Takamura, Toshinari
概要:
Aims/Introduction: To investigate the clinical and anthropometrical parameters that are associated with non-exercise act
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ivity thermogenesis that is composed of basal energy expenditure (BEE) and diet-induced thermogenesis (DIT) in patients with diabetes. Materials and Methods: Body composition was assessed using bioelectrical impedance, and BEE and DIT were measured using indirect calorimetry in 40 Japanese patients with diabetes. Results: BEE correlated positively with bodyweight, body mass index, fat mass, and fat-free mass, and correlated negatively with age in both men and women. In multivariate logistic regression analysis, BEE correlated positively with both fat mass and fat-free mass independently of sex and age. In addition, DIT correlated positively with bodyweight, body mass index, fat mass and fat-free mass, and correlated negatively with age in women, but not men. Fat-free mass contributed to DIT at least partly, and an aging-related decrease in DIT was observed. The best anthropometric parameter that reflected fat mass and fat-free mass was hip circumference (HC) and calf circumference (CC), respectively, in both men and women. Indeed, both HC (men β = 0.600, P < 0.001; women β = 0.752, P < 0.001) and CC (men β = 0.810, P = 0.012; women β = 0.821, P = 0.002) were correlated with BEE independently of age and sex. In addition, CC (β = 0.653, P = 0.009), but not HC was correlated with DIT significantly only in females, independently of age. Conclusions: HC reflects fat mass and was positively associated with BEE, but not with DIT. In contrast, CC reflects fat-free mass, and was positively associated with BEE in both men and women, and with DIT in women. © 2015 Asian Association for the Study of Diabetes and Wiley Publishing Asia Pty Ltd.
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| 95.
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Shimakami, Tetsuro ; Honda, Masao ; Shirasaki, Takayoshi ; Takabatake, Riuta ; Liu, Fanwei ; Murai, Kazuhisa ; Shiomoto, Takayuki ; Funaki, Masaya ; Yamane, Daisuke ; Murakami, Seishi ; Lemon, Stanley M. ; Kaneko, Shuichi
概要:
Clinical studies suggest that the oral acyclic retinoid Peretinoin may reduce the recurrence of hepatocellular carcinoma (HCC) following surgical ablation of primary tumours. Since hepatitis C virus (HCV) infection is a major cause of
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HCC, we assessed whether Peretinoin and other retinoids have any effect on HCV infection. For this purpose, we measured the effects of several retinoids on the replication of genotype 1a, 1b, and 2a HCV in vitro. Peretinoin inhibited RNA replication for all genotypes and showed the strongest antiviral effect among the retinoids tested. Furthermore, it reduced infectious virus release by 80-90% without affecting virus assembly. These effects could be due to reduced signalling from lipid droplets, triglyceride abundance, and the expression of mature sterol regulatory element-binding protein 1c and fatty acid synthase. These negative effects of Peretinoin on HCV infection may be beneficial in addition to its potential for HCC chemoprevention in HCV-infected patients.
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| 96.
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Takazakura, Akiko ; Sakurai, Masaru ; Bando, Yukihiro ; Misu, Hirofumi ; Takeshita, Yumie ; Kita, Yuki ; Shimizu, Akiko ; Hayakawa, Tetsuo ; Kato, Ken-ichiro ; Kaneko, Shuichi ; Takamura, Toshinari
概要:
Introduction: Several studies have shown that statins suppress the progression of diabetic nephropathy. However, few rep
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orts have directly compared the renoprotective effects between potent and conventional statins. Materials and Methods: Patients with diabetic nephropathy, selected as those with a serum creatinine level of 0.9-1.5 mg/dL and simultaneously having either microalbuminuria or positive proteinuria, were randomly assigned to one of three groups: a conventional diet therapy group, a group given 10 mg of pravastatin and a group given 10 mg of atorvastatin. Renal function was evaluated before and after a 12-month period of therapy. Results: The atorvastatin group had a significant decrease in low-density lipoprotein cholesterol at 3 months and thereafter compared with the other groups. The urinary albumin-to-creatinine ratio significantly decreased in the atorvastatin group; the degree of this decrease was significantly greater than that in the diet therapy group. The kidney function estimated with cystatin C (CysC) and the estimated glomerular filtration rate calculated from CysC were significantly preserved in the atorvastatin group compared with the pravastatin group. In a multivariate regression analysis, the use of atorvastatin was the only explanatory variable for the changes in CysC; this was independent of changes in low-density lipoprotein cholesterol. Conclusions: Atorvastatin is more effective than pravastatin for the prevention of increase in CysC, and this renoprotective effect was considered to a result of the pleiotropic effect of atorvastatin independent of its lipid-lowering effect. This study was registered with UMIN (no. UMIN 000001774). © 2014 The Authors.
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| 97.
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Nagata, Naoto ; Xu, Liang ; Kohno, Susumu ; Ushida, Yusuke ; Aoki, Yudai ; Umeda, Ryohei ; Fuke, Nobuo ; Zhuge, Fen ; Ni, Yinhua ; Nagashimada, Mayumi ; Takahashi, Chiaki ; Suganuma, Hiroyuki ; Kaneko, Shuichi ; Ota, Tsuguhito
概要:
Low-grade sustained inflammation links obesity to insulin resistance and nonalcoholic fatty liver disease (NAFLD). Howev
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er, therapeutic approaches to improve systemic energy balance and chronic inflammation in obesity are limited. Pharmacological activation of nuclear factor (erythroid-derived 2)–like 2 (Nrf2) alleviates obesity and insulin resistance in mice; however, Nrf2 inducers are not clinically available owing to safety concerns. Thus, we examined whether dietary glucoraphanin, a stable precursor of the Nrf2 inducer sulforaphane, ameliorates systemic energy balance, chronic inflammation, insulin resistance, and NAFLD in high-fat diet (HFD)–fed mice. Glucoraphanin supplementation attenuated weight gain, decreased hepatic steatosis, and improved glucose tolerance and insulin sensitivity in HFD-fed wild-type mice but not in HFD-fed Nrf2 knockout mice. Compared with vehicle-treated controls, glucoraphanin-treated HFD-fed mice had lower plasma lipopolysaccharide levels and decreased relative abundance of the gram-negative bacteria family Desulfovibrionaceae in their gut microbiomes. In HFD-fed mice, glucoraphanin increased energy expenditure and the protein expression of uncoupling protein 1 (Ucp1) in inguinal and epididymal adipose depots. Additionally, in this group, glucoraphanin attenuated hepatic lipogenic gene expression, lipid peroxidation, classically activated M1-like macrophage accumulation, and inflammatory signaling pathways. By promoting fat browning, limiting metabolic endotoxemia-related chronic inflammation, and modulating redox stress, glucoraphanin may mitigate obesity, insulin resistance, and NAFLD.
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| 98.
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Takashima, Shin-ichiro ; Usui, Soichiro ; Kurokawa, Keisuke ; Kitano, Teppei ; Kato, Takeshi ; Murai, Hisayoshi ; Furusho, Hiroshi ; Oda, Hiroyuki ; Maruyama, Michiro ; Nagata, Yoshiki ; Usuda, Kazuo ; Kubota, Koji ; Takeshita, Yumie ; Sakai, Yoshio ; Honda, Masao ; Kaneko, Shuichi ; Takamura, Masayuki
概要:
Objective: Comprehensive profiling of gene expression in peripheral blood leucocytes (PBLs) in patients with acute coron
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ary syndrome (ACS) as a prognosticator is needed. We explored the specific profile of gene expression in PBLs in ACS for long-term risk stratification. Methods: 30 patients with ACS who underwent primary percutaneous coronary intervention (PCI) and 15 age-matched adults who participated in medical check-ups were enrolled from three centres. Peripheral blood samples were collected to extract RNA for microarray analyses. Results: During the 5-year follow-up, 36% of this cohort developed the expected non-fatal coronary events (NFEs) of target lesion revascularisation (TLR) and PCI for a de novo lesion. Class comparison analysis (p<0.005) demonstrated that 83 genes among 7785 prefiltered genes (41 upregulated vs 42 downregulated genes) were extracted to classify the patients according to the occurrence of NFE. Pathway analysis based on gene ontology revealed that the NFEs were associated with altered gene expression regarding the T-cell receptor signalling pathway in ACS. Univariate t test showed that the expression level of death-associated protein kinase1 (DAPK1), known to regulate inflammation, was the most significantly negatively regulated gene in the event group (0.61-fold, p<0.0005). Kaplan-Meier curve analysis and multivariate analysis adjusted for baseline characteristics or clinical biomarkers demonstrated that lower DAPK1 expression in PBL emerged as an independent risk factor for the NFEs (HR: 8.73; CI 1.05 to 72.8, p=0.045). Conclusions: Altered gene expression in T-cell receptor signalling in PBL in ACS could be a prognosticator for secondary coronary events. © Published by the BMJ Publishing Group Limited.
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| 99.
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林, 智之 ; 鷹取, 元 ; 土山, 寿志 ; 上山本, 伸治 ; 太田, 肇 ; 稲邑, 克久 ; 辻, 宏和 ; 宮森, 弘年 ; 松田, 充 ; 蓑内, 慶次 ; 朝日向, 良朗 ; 北村, 和哉 ; 加賀谷, 尚史 ; 金子, 周一 ; Hayashi, Tomoyuki ; Takatori, Hajime ; Doyama, Hisashi ; Kamiyamamoto, Shinji ; Ohta, Hajime ; Inamura, Katsuhisa ; Tsuji, Hirokazu ; Miyamori, Hirotoshi ; Matsuda, Mitsuru ; Minouchi, Keiji ; Asahina, Yoshiro ; Kitamura, Kazuya ; Kagaya, Takashi ; Kaneko, Shuichi
概要:
[背景・目的] 現在, スクリーニング上部消化管内視鏡検査における咽頭領域の観察が十分に浸透しているとはいい難い状況である. 北陸地区における上部消化管内視鏡での咽頭観察の現状について調査した. [方法] 日本消化器内視鏡学会専門医114名
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にアンケートを送付し, 回答のあった73名を対象とし調査した. [結果] 咽頭観察を全例に行っている医師は79.5%, スクリーニングに画像強調観察(image-enhanced endoscopy:IEE)を用いた(I群)のは61.6%であった. 観察時間はI群が白色光(W群)と比べ有意に長く(p<0.001), 1年以内の癌の発見率はI群がW群と比べ有意に高かった(p=0.007). 問題点として, 観察の困難さ, 苦痛増強の可能性などの意見が多かった. [結論] スクリーニングにおける咽頭観察において, 癌の発見にはIEEにて時間をかけて観察することが重要である可能性が示唆された. 今後, さらなる咽頭観察の啓蒙活動が重要と考えられる.<br />出版者照会後に全文公開
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| 100.
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Okada, Hikari ; Honda, Masao ; Campbell, Jean S. ; Takegoshi, Kai ; Sakai, Yoshio ; Yamashita, Taro ; Shirasaki, Takayoshi ; Takabatake, Riuta ; Nakamura, Mikiko ; Tanaka, Takuji ; Kaneko, Shuichi
概要:
医薬保健研究域保健学系<br />Differentially regulated microRNA (miRNA) are associated with hepatic fibrosis; however, their potentia
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l usefulness for blocking hepatic fibrosis has not been exploited fully. We examined the expression of miRNA in the liver of a transgenic mouse model in which platelet-derived growth factor C (PDGF-C) is overexpressed (Pdgf-c Tg), resulting in hepatic fibrosis and steatosis and the eventual development of hepatocellular carcinoma (HCC). Robust induction of miR-214 correlated with fibrogenesis in the liver of Pdgf-c Tg mice, atherogenic high-fat diet-induced NASH mice, and patients with chronic hepatitis B or C. Pdgf-c Tg mice were injected with locked nucleic acid (LNA)-antimiR-214 via the tail vein using Invivofectamine 2.0 and the degree of hepatic fibrosis and tumor incidence were evaluated. Pdgf-c Tg mice treated with LNA-antimiR-214 showed a marked reduction in fibrosis and tumor incidence compared with saline or LNA-miR-control-injected control mice. In vitro, LNA-antimiR-214 significantly ameliorated TGF-β1-induced pro-fibrotic gene expression in Lx-2 cells. MiR-214 targets a negative regulator of EGFR signaling, Mig-6. Mimic-miR-214 decreased the expression of Mig-6 and increased the levels of EGF-mediated p-EGFR (Y1173 and Y845) and p-Met (Tyr1234/1235) in Huh-7 cells. Conversely, LNA-antimiR-214 repressed the expression of these genes. In conclusion, miR-214 appears to participate in the development of hepatic fibrosis by modulating the EGFR and TGF-β signaling pathways. LNA-antimiR-214 is a potential therapy for the prevention of hepatic fibrosis. MiR-214 appears to participate in the development of hepatic fibrosis by modulating EGFR and TGF-β signaling pathways. LNA-anti-miR-214 may be a potentially therapy in the prevention of hepatic fibrosis. © 2015 Japanese Cancer Association.
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