Volume 18, Issue 5 pp. 1039-1044
Original Article
Free Access

HLA B44–restricted cytotoxic T lymphocytes recognizing an epitope on hepatitis C virus nucleocapsid protein

Hiroto Kita

Hiroto Kita

Third Department of Internal Medicine, Faculty of Medicine, University of Tokyo, Tokyo 113

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Takashi Moriyama

Takashi Moriyama

Third Department of Internal Medicine, Faculty of Medicine, University of Tokyo, Tokyo 113

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Takashi Kaneko

Takashi Kaneko

Third Department of Internal Medicine, Faculty of Medicine, University of Tokyo, Tokyo 113

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Ichiro Harase

Ichiro Harase

Third Department of Internal Medicine, Faculty of Medicine, University of Tokyo, Tokyo 113

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Masayuki Nomura

Masayuki Nomura

Institute for Life Science Research, Asahi Chemical Industry Co., Ltd., Shizuoka 416, Japan

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Hideaki Miura

Hideaki Miura

Third Department of Internal Medicine, Faculty of Medicine, University of Tokyo, Tokyo 113

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Ikuo Nakamura

Ikuo Nakamura

Third Department of Internal Medicine, Faculty of Medicine, University of Tokyo, Tokyo 113

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Yoshio Yazaki

Yoshio Yazaki

Third Department of Internal Medicine, Faculty of Medicine, University of Tokyo, Tokyo 113

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Michio Imawari M.D.

Corresponding Author

Michio Imawari M.D.

Third Department of Internal Medicine, Faculty of Medicine, University of Tokyo, Tokyo 113

Department of Gastroenterology, Jichi Medical School, 3311-1 Yakushiji, Minamikawachi-machi, Kawachi-gun, Tochigi 329-04, Japan===Search for more papers by this author
First published: November 1993
Citations: 84

Abstract

Cytotoxic T lymphocytes have been reported to be involved in the immune clearance of virus-infected cells and in the pathogenesis of viral infection. We studied the cytotoxic T lymphocyte response to the putative nucleocapsid protein of hepatitis C virus in patients with chronic hepatitis C. Cytotoxic T lymphocytes specific for hepatitis C virus nucleocapsid protein were generated from peripheral blood lymphocytes by means of repeated stimulation with a synthetic hepatitis C virus nucleocapsid protein peptide. The cytotoxic T lymphocytes were CD8 positive and recognized an epitope in hepatitis C virus nucleocapsid protein residues 81 to 100 in association with a human leukocyte antigen class I molecule, B44. The peptideinduced cytotoxic T lymphocytes recognized target cells synthesizing hepatitis C virus nucleocapsid protein endogenously, though less efficiently than peptide-pulsed target cells. The human leukocyte antigen B44–restricted cytotoxic T lymphocyte response was observed in three of five patients with chronic hepatitis C and a human leukocyte antigen B44 molecule but in neither of two hepatitis C virus–negative healthy individuals with human leukocyte antigen B44 molecules. The results demonstrate the presence of hepatitis C virus–specific cytotoxic T lymphocytes in the peripheral blood of patients with chronic hepatitis C and provide a strategy to study the role of cytotoxic T lymphocytes in the viral clearance and the pathogenesis of hepatitis C virus infection. (HEPATOLOGY 1993;18:1039-1044).

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