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T cell interleukin-15 surface expression in chimpanzees infected with human immunodeficiency virus

机译:感染人类免疫缺陷病毒的黑猩猩中T细胞白介素15表面表达

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摘要

Interleukin-15 (IL-15) contributes to natural killer cell development and immune regulation. However, IL-15 and interferon-gamma (IFN-y) production are significantly reduced during progression to AIDS. We have previously reported that HIV infected chimpanzees {Pan troglodytes) express CD3-CD8+ IFN-gamma+ natural killer (NK) cells with an inverse correlation to plasma HIV viral load. To expand on our initial study, we examined a larger population of HIV infected chimpanzees (n = 10). Whole blood flow cytom-etry analyses showed that recombinant gpl20 (rgpl20) or recombinant IL-15 induces specific CD3-CD8+ IFN-gamma+ NK cells at higher levels than CD3+CD8+ IFN-gamma+ T cells in HIV infected specimens. Interestingly, peripheral blood T cells exhibited 0.5-3% IL-15 surface Tcell/NKT cell phenotypes, and rIL-15 stimulation significantly (P < 0.007) up-regulated CD4+CD25+ T cell expression. Importantly, these data demonstrate novel T cell interleukin-15 expression and indicate a plausible regulatory mechanism for this cell-type during viral infection.
机译:白介素15(IL-15)有助于自然杀伤细胞的发育和免疫调节。但是,在发展为艾滋病的过程中,IL-15和干扰素-γ(IFN-γ)的产生明显减少。我们以前曾报道过,HIV感染的黑猩猩(Pan穴居人)表达CD3-CD8 +IFN-γ+自然杀伤(NK)细胞,与血浆HIV病毒载量呈负相关。为了扩展我们的初始研究,我们检查了较大数量的被HIV感染的黑猩猩(n = 10)。全血细胞流式细胞仪分析表明,重组gp120(rgp120)或重组IL-15可以在感染HIV的标本中以比CD3 + CD8 +IFN-γ+ T细胞更高的水平诱导特异性CD3-CD8 +IFN-γ+ NK细胞。有趣的是,外周血T细胞表现出0.5-3%的IL-15表面T细胞/ NKT细胞表型,并且rIL-15刺激显着(P <0.007)上调了CD4 + CD25 + T细胞的表达。重要的是,这些数据证明了新型T细胞白介素15的表达,并表明了病毒感染过程中这种细胞类型的合理调控机制。

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