Pol-specific T lymphocyte responses in Chinese HIV-1 recombinant subtype B/C infectors at different stages of diseases
10.3760/cma.j.issn.0254-5101.2009.05.006
- VernacularTitle:中国HIV-1 B/C重组毒株不同阶段感染者多聚酶蛋白特异性T淋巴细胞反应的研究
- Author:
Hongwei LIU
;
Kunxue HONG
;
Yuan YUAN
;
Zujiang YU
;
Chunhua LIU
;
Jianping CHEN
;
Yuhua RUAN
;
Quancheng KAN
;
Zhe WANG
;
Yiming SHAO
- Publication Type:Journal Article
- Keywords:
Human immunedeficiency virus (HIV);
Pol;
Specific T lymphocyte response;
ELISPOT
- From:
Chinese Journal of Microbiology and Immunology
2009;29(5):407-410
- CountryChina
- Language:Chinese
-
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.
