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Jing-Bo Zhang, An Chen, Yu-Zhang Wu, Institute of Immunology of Chinese PLA, Third Military Medical University, Chongqing 400038, China
Shi-Yuan Chen, Ting-Rong Li, Hospital of Infectious Diseases of Chongqing, Chongqing 400030, China
Zhi-Qing Yang, Department of Hepatobiliary Diseases, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
Supported by: the Major State Basic Research Development Program of China (973 Program), No. 2001CB510001; The Major Programs of the National Natural Science Foundation of China, No. 11111111.
Correspondence to: Yu-Zhang Wu, Institute of Immunology of Chinese PLA, Third Military Medical University, Chongqing 400038, China. wuyuzhang@yahoo.com
Received: October 10, 2003 Revised: January 9, 2004 Accepted: February 3, 2004 Published online: May 15, 2004
AIM: To investigate the function state of epitope-specific cytotoxic T lymphocytes (CTLs) in chronic hepatitis B infection
METHODS: The study was performed to quantify the HBV specific CTL directly in vitro by HLA-A2 tetrameric complexes for core 18-27 (Tc 18-27), envelope 183-191 (Te 183-191), envelope 335-343 (Te 335-343), and polymerase 575-583 (Tp 575-583) in active chronic hepatitis patients, and then the correlation of HBV epitope-specific CTL between serum HBV DNA loads or alanine aminotransmerase (ALT) levels were analyzed by multiple regression analysis.
RESULTS: It was found that there were multiple CTLs responses in active chronic hepatitis patients. The frequency of Tc18-27 response was higher than the other three epitope-specific CTLs. No significant correlation was found either between the frequency of HBV specific CD8+ T cells and the viral load, or the frequency of HBV specific CD8+ T cells and the levels of alanine transaminase.
CONCLUSION: The frequencies of HBV-specific T cells are not determinant of immune-mediated protection in HBV infection and the existence of epitope-specific HBV CTLs is not directly correlated to hepatocytic injury.
Key Words: N/A
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