Cytokine requirements for the differentiation and expansion of IL-17A- and IL-22-producing human Vgamma2Vdelta2 T cells.

Cytokine requirements for the differentiation and expansion of IL-17A- and IL-22-producing human Vgamma2Vdelta2 T cells.
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DOI:
10.4049/jimmunol.1000600
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发表时间:
2010-06-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Morita CT
Morita CT
中科院分区:
其他
文献类型:
--
作者:
Ness-Schwickerath KJ;Jin C;Morita CT

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表达Vγ 2 VS 2 TCR的人γδ T细胞通过监测异戊烯焦磷酸类异戊二烯代谢物在对微生物病原体的免疫应答中起重要作用。大多数成年Vγ 2 VS 2细胞是产生IFN-γ的记忆细胞毒性细胞。最近,发现小鼠γδ T细胞是抗微生物和自身免疫应答中IL-17 A的主要来源。为了确定灵长类γδ T细胞是否发挥类似的作用,我们表征了Vγ 2 VS 2细胞的IL-17 A和IL-22产生。产生IL-17 A的记忆Vγ 2 VS 2细胞在成年人中以低但显著的频率存在(1:2,762 T细胞),并且在成年恒河猴中以甚至更高的频率存在。较高水平的Vγ 2 VS 2细胞产生IL-22(1:1,864 T细胞),尽管很少产生IL-17 A和IL-22。与许多IL-17 A + Vγ 2 V δ2细胞也产生IFN-γ(Tγδ1/17)的成年人不同,大多数成年猕猴IL-17 A + Vδ2细胞(Tγδ17)不产生IFN-γ。为了确定Tγδ17细胞的细胞因子需求,我们在体外用细菌抗原HMBPP和各种细胞因子和mAb刺激人新生儿Vγ 2 VS 2细胞。我们发现IL-6、IL-1β和TGF-β是新生儿产生Tγδ17细胞所必需的,而Tγδ1/17细胞还需要IL-23。在成人中,记忆性Tγδ1/17和Tγδ17细胞需要IL-23、IL-1β和TGF-β,但不需要IL-6。产生IL-22的细胞表现出类似的要求。新生儿和成人IL-17 A + Vγ 2 V δ2细胞均表达升高水平的RORγt。我们的数据表明,与Th 17 αβ T细胞一样,Vγ 2 V δ2 T细胞可以极化为Tγδ17和Tγδ1/17群体,其初始极化和后期维持具有不同的细胞因子需求。
Human γδ T cells expressing the Vγ2Vδ2 TCR play important roles in immune responses to microbial pathogens by monitoring prenyl pyrophosphate isoprenoid metabolites. Most adult Vγ2Vδ2 cells are memory cytotoxic cells that produce IFN-γ. Recently, murine γδ T cells were found to be major sources of IL-17A in anti-microbial and autoimmune responses. To determine if primate γδ T cells play similar roles, we characterized IL-17A and IL-22 production by Vγ2Vδ2 cells. IL-17A-producing memory Vγ2Vδ2 cells exist at low but significant frequencies in adult humans (1:2,762 T cells) and at even higher frequencies in adult rhesus macaques. Higher levels of Vγ2Vδ2 cells produce IL-22 (1:1,864 T cells) although few produce both IL-17A and IL-22. Unlike adult humans where many IL-17A+ Vγ2Vδ2 cells also produce IFN-γ (Tγδ1/17), the majority of adult macaques IL-17A+ Vδ2 cells (Tγδ17) do not produce IFN-γ. To define the cytokine requirements for Tγδ17 cells, we stimulated human neonatal Vγ2Vδ2 cells with the bacterial antigen, HMBPP, and various cytokines and mAbs in vitro. We find that IL-6, IL-1β, and TGF-β are required to generate Tγδ17 cells in neonates whereas Tγδ1/17 cells additionally required IL-23. In adults, memory Tγδ1/17 and Tγδ17 cells required IL-23, IL-1β, and TGF-β but not IL-6. IL-22-producing cells showed similar requirements. Both neonatal and adult IL-17A+ Vγ2Vδ2 cells expressed elevated levels of RORγt. Our data suggest that, like Th17 αβ T cells, Vγ2Vδ2 T cells can be polarized into Tγδ17 and Tγδ1/17 populations with distinct cytokine requirements for their initial polarization and later maintenance.
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