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[by] Seymour J. Klebanoff, Robert A. Clark
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Nakanishi, Yoshinobu ; Hashimoto, Yumi ; Takizawa, Takenori ; Shiratsuchi, Akiko
概要:
金沢大学医薬保健研究域薬学系<br />Influenza virus-infected cells are induced to undergo apoptosis and become susceptible to phagocytos
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is. Data from our in vitro and in vivo experiments have suggested that 1) alveolar macrophages and neutrophils phagocytose influenza virus-infected cells in an apoptosis-dependent manner; 2) the membrane phospholipid phosphatidylserine and viral neuraminidase-processed carbohydrates at the surface of target cells and phagocytes, respectively, are involved in the association of the two types of cells; and 3) phagocytic elimination of virus-infected cells leads to a reduction in the pathogenesis of influenza. These findings could lead to the development of a novel antiviral agent against influenza. © 2008 Bentham Science Publishers Ltd.全文公開200906
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論文
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坂井, 宣彦 ; 遠山, 直志 ; 岩田, 恭宣 ; 清水, 美保 ; 古市, 賢吾 ; 今村, 龍 ; 須田, 貴司 ; 金子, 周一 ; 和田, 隆志
概要:
金沢大学医薬保健研究域医学系<br />Mortality from infections has been reported to be higher in hemodialysis (HD) patients. Although dys
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function of neutrophils against bacterial infection was reported in HD patients, the precise mechanism remains to be clarified. We therefore examined the impacts of neutrophil inflammatory signaling on bactericidal activity in HD patients. Comprehensive analyses of intracellular signalings were performed in whole blood of HD patients and control using a microarray system. To confirm the contribution of the signaling to bactericidal activity in neutrophils, we examined the phosphorylation, bacterial killing function, reactive oxygen species (ROS) production, and myeloperoxidase (MPO) release in neutrophils against Staphylococcus aureus. RNA microarray analysis showed the suppression of p38 mitogen activated protein kinase (MAPK) signaling in HD patients. Neutrophils in HD patients showed the impairment of bactericidal activity against S. aureus compared to healthy subjects. Phosphorylation rate of p38MAPK of neutrophils in response to S. aureus was lower in HD patients than healthy subjects. The levels of ROS produced by neutrophils after co-culture with S. aureus were lower in HD patients, on the other hand, there was no difference of MPO release between HD patients and healthy subjects. A selective pharmacological inhibitor of p38MAPK suppressed bacterial killing function as well as ROS production in neutrophils of healthy subjects. Impairment of p38MAPK signaling pathway might contribute to the suppression of neutrophil bactericidal activity in HD patients through less production of ROS. © 2018 International Society for Apheresis, Japanese Society for Apheresis, and Japanese Society for Dialysis Therapy.<br />Embargo Period 12 months
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