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Suppression of HIV-1 Replication by HIV-1-Irrelevant CD8~+ Cytotoxic T Lymphocytes and their Culture Supernatants

机译:HIV-1-Irrellate CD8〜+细胞毒性T淋巴细胞及其培养上清液抑制HIV-1复制

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CD8~+ cells of asymptomatic HIV-1 carriers (AC) suppress HIV-1 replication in a class I major histocompatibility complex (MHC-I)-unrestricted manner. In order to investigate the mechanism of MHC-I-unrestricted CD8~+ cell-mediated HIV-1-suppression, we used allo-specific CD8~+ cytotoxic T lymphocytes (CTLs) established from three HIV-1-uninfected individuals. We found that all of three allo-specific CTL lines significantly suppressed HIV-1 replication in acutely infected autologous CD4~+ peripheral blood mononuclear cells (PBMC) when directly cocultured. However, culture supernatants of only one of these CTL lines suppressed HIV-1 replication. Suppression of HIV-1 replication mediated by CTLs and the culture supernatant was not significantly affected by neutralizing antibodies to various interferons and chemokines. Our results indicate that CD8~+ CTLs can suppress HIV-1 replication in PBMC mostly through cell-cell contact, and less frequently through soluble factor, in an antigen-nonspecific manner.
机译:无症状HIV-1载体(AC)的CD8〜+细胞(AC)抑制了I类主要组织相容性复合物(MHC-I) - 不受限制的方式中的HIV-1复制。为了研究MHC-I - 不受限制的CD8〜+细胞介导的HIV-1抑制的机制,我们使用了从三个HIV-1-未感染的个体中建立的偶发特异性CD8〜+细胞毒性T淋巴细胞(CTL)。我们发现,当直接共携带时,所有三种特异性CTL系列在急性受感染的自体CD4〜+外周血单核细胞(PBMC)中显着抑制了HIV-1复制。然而,只有其中一个CTL系中的培养上清液抑制了HIV-1的复制。通过CTL和培养上清液介导的HIV-1复制的抑制不会显着影响各种干扰素和趋化因子的抗体。我们的结果表明,CD8〜+ CTLS可以在抗原非特异性的方式中抑制PBMC中的HIV-1复制,并且通过可溶性因子较少。

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