TNF-alpha is a positive regulatory factor for human Vgamma2 Vdelta2 T cells.

TNF-alpha is a positive regulatory factor for human Vgamma2 Vdelta2 T cells.
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DOI:
10.4049/jimmunol.181.10.7131
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发表时间:
2008-11-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Pauza CD
Pauza CD
中科院分区:
其他
文献类型:
--
作者:
Li H;Luo K;Pauza CD

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人外周血Vγ 2 V δ2 T细胞识别磷抗原,在机体防御和免疫调节中发挥重要作用。TCR是Vγ 2 VS 2 T细胞对磷酸化抗原应答所必需的,但对可溶性或细胞相关共刺激分子知之甚少。在这项研究中,我们发现人Vγ 2 V δ2 T细胞对磷酸化抗原的应答,包括活化、增殖、细胞因子产生和肿瘤细胞毒性,需要TNF-α与其受体结合,优先选择TNFR 2。由于刺激的Vγ 2 V δ2细胞也产生TNF-α,这可能是维持应答的阳性对照机制。在TNF-α或TNFR阻断剂存在下,TLR 2激动剂Pam 3Cys部分挽救了受损的增殖。我们的研究表明TNF-α在调节人Vγ 2 V δ2 T细胞免疫应答中起关键作用。
Vγ2Vδ2 T cells in human peripheral blood recognize phosphoantigen and play important roles in host defense and immunoregulation. The TCR is required for Vγ2Vδ2 T cell responses to phosphoantigen, but less is known about soluble or cell-associated costimulatory molecules. In this study, we show that human Vγ2Vδ2 T cell responses to phosphoantigen, including activation, proliferation, cytokine production, and tumor cell cytotoxicity, require TNF-α binding to its receptor, with a preference for TNFR2. Because stimulated Vγ2Vδ2 cells also produce TNF-α, this may be a positive control mechanism to sustain the response. Impaired proliferation in the presence of TNF-α or TNFR blocking agents was partially rescued by a TLR2 agonist, Pam3Cys. Our studies demonstrate that TNF-α plays a critical role in regulating human Vγ2Vδ2 T cell immune responses.
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