Pol-specific T lymphocyte responses in Chinese HIV-1 recombinant subtype B/C infectors at different stages of diseases
LIU Hong-wei, YUAN Yuan, LIU Chun-hua, WANG Zhe
Published 2009-05-30
Cite as Chin J Microbiol Immunol, 2009, 29(5): 407-410. DOI: 10.3760/cma.j.issn.0254-5101.2009.05.006
Abstract
Objective To analyze the character of Pol-specific T lymphocyte responses and identify immunodominant region recognized in Chinese HIV-1 recombinant subtype B/C infectors at different stages of diseases. Methods Eleven Chinese HIV-1 recombinant subtype B/C infectors infected in 18 months, 25 which infected time more than 3 years and 10 HIV-1-seronegative healthy individuals were enrolled. HIV-1-specific T lymphocyte responses were analyzed by an IFN-γ ELISPOT assay against 249 overlapping peptides spanning HIV-1 Pol protein in the present study. Results Pol-specific T lymphocyte responses of IFN-γsecretion were identified in 8 (72.73%) out of 11 infectors infected in 18 months, the specific T lymphocytes are mainly targe-ted at six peptides which amino acid position from Pol 481 to 631 in reverse transcriptase region: Pol5581, Pol5582, Pol5587, Pol5609, Pol5610 and Pol5615. There was a negative correlation between the breadth of re-sponse and peripheral CD4+ T cell count (P=0.0212, r=-0.762) ; Responses were identified in 15 (60%) out of 25 chronic infectors, the specific T lymphocytes are mainly targeted at four peptides which amino acid po-sition from Pol 241 to 295: Pol5521, Pol5525, Pol5526, Pol5531 and another peptide: Pol5638 which amino acid position from Pol 708 to 722 in reverse transcriptase region. There was a positive correlation between the magnitude of Pol-specific IFN-γ secretion T lymphocyte responses and plasma viremia (P = 0.006 95 , r = 0.660) . None of the seronegative healthy individuals gave the positive responses. Conclusion Chinese HIV-1 recombinant subtype B/C infectors at different stages of diseases mainly recognized different re-gions of Pol.
Key words:
Human immunedeficiency virus (HIV) ; Pol ; Specific T lymphocyte response; ELISPOT
Contributor Information
LIU Hong-wei
Center or AIDS/STD Control and Prevention, He-nan Center for Disease Control and Prevention, Zhengzhou 450016, China
YUAN Yuan
Center or AIDS/STD Control and Prevention, He-nan Center for Disease Control and Prevention, Zhengzhou 450016, China
LIU Chun-hua
Center or AIDS/STD Control and Prevention, He-nan Center for Disease Control and Prevention, Zhengzhou 450016, China
WANG Zhe
Center or AIDS/STD Control and Prevention, He-nan Center for Disease Control and Prevention, Zhengzhou 450016, China