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Enhancement of tumor-associated antigen-specific T cell responses by radiofrequency ablation of hepatocellular carcinoma

フォーマット:
論文
責任表示:
Mizukoshi, Eishiro ; Yamashita, Tatsuya ; Arai, Kuniaki ; Sunagozaka, Hajime ; Ueda, Teruyuki ; Arihara, Fumitaka ; Kagaya, Takashi ; Yamashita, Taro ; Fushimi, Kazumi ; Kaneko, Shuichi
言語:
英語
出版情報:
Wiley-Blackwell, 2013-04-01
著者名:
Mizukoshi, Eishiro
Yamashita, Tatsuya
Arai, Kuniaki
Sunagozaka, Hajime
Ueda, Teruyuki
Arihara, Fumitaka
Kagaya, Takashi
Yamashita, Taro
Fushimi, Kazumi
Kaneko, Shuichi
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掲載情報:
Hepatology
ISSN:
0270-9139  CiNii Articles  Webcat Plus  JAIRO
巻:
57
通号:
4
開始ページ:
1448
終了ページ:
1457
バージョン:
author
概要:
Radiofrequency ablation (RFA) is one of the treatments for hepatocellular carcinoma (HCC) and is known to enhance host immune response. However, the epitopes to which enhanced immune responses occur, the impact on patient prognosis, and the functions and phenotype of T cells induced are still unclear. To address these issues, we analyzed immune responses before and after RFA in 69 HCC patients using 11 tumor-associated antigen (TAA)-derived peptides that we identified to be appropriate to analyze HCC-specific immune responses. The immune responses were analyzed using enzyme-linked immunospot (ELISPOT) assay and tetramer assays using peripheral blood mononuclear cells. An increase in the number of TAA-specific T cells detected by interferon-γ ELISPOT assays occurred in 62.3% of patients after RFA. The antigens and their epitope to which enhanced T cell responses occur were diverse, and some of them were newly induced. The number of TAA-specific T cells after RFA was associated with the prevention of HCC recurrence, and it was clarified to be predictive of HCC recurrence after RFA by univariate and multivariate analyses. The number of TAA-specific T cells after RFA was inversely correlated with the frequency of CD14+HLA-DR-/low myeloid-derived suppressor cells (MDSCs). The modification of T cell phenotype was observed after RFA. The number of TAA-specific T cells at 24 weeks after RFA was decreased. Conclusion: Although RFA can enhance various TAA-specific T cell responses and the T cells induced contribute to the HCC recurrence-free survival of patients, besides immunosuppression by MDSCs, the memory phenotype and lifetime of TAA-specific T cells are not sufficient to prevent HCC recurrence completely. Additional treatments by vaccine or immunomodulatory drugs might be useful to improve the immunological effect of RFA. © 2012 American Association for the Study of Liver Diseases. 続きを見る
URL:
http://hdl.handle.net/2297/34664

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