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Extracellular HIV-1 Nef protein modulates lytic activity and proliferation of human CD8(+) T lymphocytes

机译:细胞外HIV-1 Nef蛋白调节人CD8(+)T淋巴细胞的溶解活性和增殖

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摘要

The effect of extracellular HIV Nef (exNef) protein on the induction of lytic activity and proliferation of CD8(+)T lymphocytes from 18 donors was studied. At 10ng/ml, exNef-induced a 2- to 8-fold enhancement of basal lytic activity in cells from all donors in an allogeneic induction assay, whereas it was ineffective at 100ng/ml. The extent of enhancement was inversely correlated with the basal level of lytic activity without exNef. Only in combination with PHA did both exNef concentrations stimulate proliferation, and in a manner inversely related to the effect of PHA alone. Thus, concentrations of exNef commonly found in sera of HIV-infected patients were found to modulate the induction of lytic activity and proliferation of CD8(+) T lymphocytes in vitro, to an extent strongly dependent on the quite variable responsiveness of each donor. These findings point to Nef as a potential agent for modulating CD8(+) T cell function in pathogenesis and therapy. (c) 2008 Elsevier Inc. All rights reserved.
机译:研究了细胞外HIV Nef(exNef)蛋白对来自18个供体的CD8(+)T淋巴细胞裂解活性和增殖的诱导作用。在同种异体诱导试验中,exNef以10ng / ml的浓度诱导所有供体细胞的基础溶解活性提高2到8倍,而100ng / ml则无效。增强的程度与没有exNef的裂解活性的基础水平成反比。仅与PHA结合使用,两种exNef浓度均能刺激增殖,并且与单独PHA的作用呈反相关。因此,发现在艾滋病毒感染患者的血清中普遍发现的exNef的浓度在一定程度上调节了CD8(+)T淋巴细胞的裂解活性和增殖的诱导,在很大程度上取决于每个供体的反应能力。这些发现表明,Nef是在发病机理和治疗中调节CD8(+)T细胞功能的潜在药物。 (c)2008 Elsevier Inc.保留所有权利。

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