Human Immunodeficiency Virus Type 1 Specific Cytotoxic T Lymphocyte Responses in Chinese Infected with HIV-1 B'/C Recombinant (CRF07_BC)

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Human Immunodeficiency Virus Type 1 Specific Cytotoxic T Lymphocyte Responses in Chinese Infected with HIV-1 B'/C Recombinant (CRF07_BC)

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Title: Human Immunodeficiency Virus Type 1 Specific Cytotoxic T Lymphocyte Responses in Chinese Infected with HIV-1 B'/C Recombinant (CRF07_BC)
Author: Chen, Jianping; Hong, Kunxue; Jia, Mingming; Liu, Hongwei; Zhang, Yuanzhi; Zhang, Xiaoqing; Zhao, Hongjing; Peng, Hong; Ma, Pengfei; Xing, Hui; Ruan, Yuhua; Shao, Yiming; Liu, Sha; Altfeld, Marcus; Walker, Bruce David; Williams, Katie L.; Yu, Xu G.

Note: Order does not necessarily reflect citation order of authors.

Citation: Chen, Jianping, Kunxue Hong, Mingming Jia, Hongwei Liu, Yuanzhi Zhang, Sha Liu, Xiaoqing Zhang, et al. 2007. Human immunodeficiency virus type 1 specific cytotoxic T lymphocyte responses in Chinese infected with HIV-1 B'/C Recombinant (CRF07_BC). Retrovirology 4(1): 62.
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Abstract: Background: The characterization of HIV-1-specific T cell responses in people infected with locally circulating HIV-1 strain will facilitate the development of HIV-1 vaccine. Sixty intravenous drug users infected with HIV-1 circulating recombinant form 07_BC (CRF07_BC), which has been spreading rapidly in western China from north to south, were recruited from Xinjiang, China to assess the HIV-1-specific T cell responses at single peptide level with overlapping peptides (OLP) covering the whole concensus clades B and C proteome. Results: The median of the total magnitude and total number of OLPs recognized by CTL responses were 10925 SFC/million PBMC and 25 OLPs, respectively, when tested by clade C peptides, which was significantly higher than when tested by clade B peptides. The immunodominant regions, which cover 14% (58/413) of the HIV-1 proteome, are widely distributed throughout the HIV-1 proteome except in Tat, Vpu and Pol-PR, with Gag, Pol-RT, Pol-Int and Nef being most frequently targeted. The subdominant epitopes are mostly located in p24, Nef, integrase, Vpr and Vif. Of the responses directed to clade C OLPs, 61.75% (972/1574) can be observed when tested with corresponding clade B OLPs. However, Pol-PR and Vpu tend to be targeted in the clade B sequence rather than the clade C sequence, which is in line with the recombinant pattern of CRF07_BC. Stronger and broader CTL responses in subjects with CD4 cell counts ranging from 200 to \(400/mm^3\) were observed when compared to those with less than \(200/mm^3\) or more than \(400/mm^3\), though there have been no significant correlations identified between the accumulative CTL responses or overall breadth and CD4 cell count or plasma viral load. Conclusion: This is the first study conducted to comprehensively address T cell responses in Chinese subjects infected with HIV-1 CRF07_BC in which subtle differences in cross-reactivity were observed, though similar patterns of overall immune responses were demonstrated with clade B infected populations. The immunodominant regions identified in this population can facilitate future HIV-1 vaccine development in China.
Published Version: doi:10.1186/1742-4690-4-62
Other Sources: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2018724/
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:10229936
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