Dynamics of viral variants in HIV-1 Nef and specific cytotoxic T lymphocytes in vivo.

Dynamics of viral variants in HIV-1 Nef and specific cytotoxic T lymphocytes in vivo.
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HIV-1 Nef 和体内特定细胞毒性 T 淋巴细胞中病毒变体的动态。

DOI:
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发表时间:
1996
影响因子:
4.4
通讯作者:
B. Autran
B. Autran
中科院分区:
医学2区
文献类型:
--
作者:
G. Haas;U. Plikat;P. Debré;M. A. Lucchiari;C. Katlama;Y. Dudoit;O. Bonduelle;M. Bauer;H. Ihlenfeldt;G. Jung;Bernhard Maier;A. Meyerhans;B. Autran

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针对艾滋病毒的强有力的CTL反应被认为对减少艾滋病毒病毒载量很重要,尽管它无法阻止正在进行的病毒复制,而病毒复制会产生新的抗原变体。我们分析了HIV-1Nef五个表位的顺序变化对四名稳定患者CTL识别的影响。在所有这些患者中,我们都发现了很高的变异率,在两个时间点,我们可以检测到发生在5个人类白细胞抗原A2或人类白细胞抗原B7限制性Nef表位的36个自体病毒变异中的32个的CTL。观察到对病毒变异的CTL反应有两种不同的模式:1)病毒变异的暂时扩增,随后是变异特异性CTL的扩大,最终导致最初的14个表位变异中的12个在两年内消失。第二组病毒变体取代了最初的病毒变体,也可以在相同或替代的HLA分子的背景下刺激特定的CTL前体;以及2)尽管有特定的CTL识别,但两个病毒变体仍在相对保守的表位中持续存在。因此,免疫系统的显著灵活性允许CTL不断适应多种艾滋病毒变种,从而消除进展缓慢的产生艾滋病毒变种的细胞。
The vigorous CTL response directed against HIV is considered to be important in reducing HIV viral load, although it is unable to stop ongoing viral replication, which generates new antigenic variants. We analyzed the impact of sequential changes in five epitopes of HIV-1 Nef on CTL recognition in four stable patients. A high rate of variation was found, and in all these patients we could detect CTL specific for 32 out of 36 autologous viral variants occurring in 5 HLA-A2- or HLA-B7-restricted Nef epitopes at two time points. Two distinct patterns for dynamics of CTL responses to viral variation were observed: 1) temporary amplification of viral variants followed by expansion of variant-specific CTL, ultimately leading to the disappearance of 12 out of the 14 initial epitope variants within two years. A second set of viral variants that had replaced the initial ones could also stimulate specific CTL precursors in the context of the same or an alternative HLA molecule; and 2) persistence of 2 viral variants in relatively conserved epitopes despite specific CTL recognition. Therefore, a remarkable flexibility of the immune system allows constant adaptation of CTL to multiple HIV variants and thus elimination of HIV variant-producing cells in slow progressors.
细胞毒性 T 淋巴细胞似乎不会选择猿猴免疫缺陷病毒 gag 免疫显性表位的突变。
DOI: --
发表时间: 1992
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
作者:
Chen,ZW;Shen,L;Miller,MD;Ghim,SH;Hughes,AL;Letvin,NL
通讯作者: Letvin,NL
DOI: --
发表时间: 1991
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
作者:
Johnson,RP;Trocha,A;Yang,L;Mazzara,GP;Panicali,DL;Buchanan,TM;Walker,BD
通讯作者: Walker,BD
人类免疫缺陷病毒 1 型 Nef 与 T 淋巴细胞中的细胞丝氨酸激酶相关。
DOI: 10.1073/pnas.91.4.1539
发表时间: 1994
影响因子: 11.1
作者:
Sawai,ET;Baur,A;Struble,H;Peterlin,BM;Levy,JA;Cheng-Mayer,C
通讯作者: Cheng-Mayer,C
DOI: 10.4049/jimmunol.147.8.2697
发表时间: 1991-10
影响因子: 4.4
作者:
J. Fetten;N. Roy;E. Gilboa
通讯作者: J. Fetten;N. Roy;E. Gilboa