Conserved CTL epitopes shared between HIV-infected human long-term survivors and chimpanzees.

Conserved CTL epitopes shared between HIV-infected human long-term survivors and chimpanzees.
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HIV 感染的人类长期幸存者和黑猩猩之间共有保守的 CTL 表位。

DOI:
10.4049/jimmunol.162.4.2308
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发表时间:
1999
影响因子:
4.4
通讯作者:
Jonathan L. Heeney
Jonathan L. Heeney
中科院分区:
医学2区
文献类型:
--
作者:
S. Balla;Gerrit Koopman;P. Mooij;T. Haaksma;V. Teeuwsen;Ronald E. Bontrop;Jonathan L. Heeney

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某些HIV-1感染的人没有发展成艾滋病,但有文献记载他们共享与长期生存相关的MHC I类等位基因。感染hiv -1的黑猩猩对发展为艾滋病具有相对的抵抗力。在一组10只具有CTL活性和非进行性HIV-1感染的黑猩猩中,研究人员详细研究了2只对HIV-1 Ags具有显著细胞溶解性CD3+CD8+ T细胞反应的黑猩猩。对这些CTL的鉴定表明,它们含有颗粒酶A和B、T细胞胞内Ag-1和穿孔素,并诱导钙依赖性细胞溶解,这与靶细胞中凋亡核的存在有关。这些CTL反应针对两种肽,这两种肽被发现与先前描述的HLA-B27和HLA-B57分子识别的表位相同。后两种限制因素在人类长期幸存者群体中出现的频率更高。系统发育比较显示,本文描述的黑猩猩限制性元件Patr-B*02和-B*03与HLA-B*27和-B*57等位基因没有任何明显的相似性,这表明不同灵长类物种对HIV-1的CTL反应可能由不同类型的HLA-B样分子控制。然而,这两只黑猩猩的CTL反应是针对大多数HIV-1进化支中高度保守的表位定位的。
Certain HIV-1 infected humans that do not progress to AIDS have been documented to share particular MHC class I alleles that appear to correlate with long-term survival. HIV-1-infected chimpanzees are relatively resistant to progression to AIDS. Out of a group of 10 chimpanzees with CTL activity and nonprogressive HIV-1 infection, 2 animals with prominent cytolytic CD3+CD8+ T cell responses to HIV-1 Ags were studied in detail. Characterization of these CTL revealed that they contained the granzymes A and B, T cell intracellular Ag-1, and perforin and induced calcium-dependent cytolysis that correlated with the presence of apoptotic nuclei in target cells. These CTL responses were directed against two gagpeptides, which were found to be identical to previously described epitopes recognized in the context of HLA-B27 and HLA-B57 molecules. The latter two restriction elements occur with increased frequency in human long-term survivor cohorts. Phylogenetic comparisons revealed that the chimpanzee restriction elements, Patr-B*02and -B*03, described here do not show any obvious similarity with the HLA-B*27 and -B*57 alleles, suggesting that CTL responses to HIV-1 in distinct primate species may be controlled by different types of HLA-B-like molecules. The CTL responses in these two chimpanzees are directed, however, against highly conserved epitopes mapping across the majority of HIV-1 clades.
感染猕猴猿免疫缺陷病毒的恒河猴体内的 gag 特异性细胞毒性 T 淋巴细胞。
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在用表达艾滋病病毒包膜糖蛋白的重组痘苗病毒免疫的黑猩猩中,T细胞对艾滋病病毒糖蛋白具有增殖性和细胞毒性。
DOI: --
发表时间: 1987
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
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