Nitric oxide-induced regulatory T cells inhibit Th17 but not Th1 cell differentiation and function.

Nitric oxide-induced regulatory T cells inhibit Th17 but not Th1 cell differentiation and function.
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DOI:
10.4049/jimmunol.1202580
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发表时间:
2013-07-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Liew FY
Liew FY
中科院分区:
其他
文献类型:
--
作者:
Niedbala W;Besnard AG;Jiang HR;Alves-Filho JC;Fukada SY;Nascimento D;Mitani A;Pushparaj P;Alqahtani MH;Liew FY

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一氧化氮(NO)是一种具有多效性功能的自由基。我们之前已经证明,NO 会诱导 CD4+CD25+Foxp3− 调节性 T 细胞 (NO-Treg) 群体,从而在体外和体内抑制 CD4+CD25− 效应 T 细胞的功能。我们在这里报告了一个意外的发现,即 NO-Treg 抑制 Th17,但不抑制 Th1 细胞的分化和功能。相比之下,抑制 Th1 细胞的天然 Tregs (nTreg) 却无法抑制 Th17 细胞。与这一观察结果一致,NO-Tregs抑制RORγt的表达,但不抑制T-bet的表达,而nTregs抑制T-bet的表达,但不抑制RORγt的表达。 NO-Tregs 介导的 Th17 抑制部分依赖于细胞接触,并且与 IL-10 相关。在体内,过继转移的NO-Tregs可有效减弱实验性自身免疫性脑脊髓炎(EAE)。疾病抑制伴随着引流淋巴结中 Th17 的减少,但不是 Th1 细胞的减少,以及 IL-17 产生的减少,但 IL-10 合成的增加。因此,我们的结果证明了 NO-Treg 和 nTreg 之间的差异抑制功能,并表明免疫系统调节机制的特殊性。
Nitric oxide (NO) is a free radical with pleiotropic functions. We have shown earlier that NO induces a population of CD4+CD25+Foxp3− regulatory T cells (NO-Tregs) which suppress the functions of CD4+CD25− effector T cells in vitro and in vivo. We report here an unexpected finding that NO-Tregs suppressed Th17 but not Th1 cell differentiation and function. In contrast, natural Tregs (nTregs), which suppressed Th1 cells, failed to suppress Th17 cells. Consistent with this observation, NO-Tregs inhibited the expression of RORγt but not T-bet, whereas nTregs suppressed T-bet, but not RORγt expression. The NO-Tregs-mediated suppression of Th17 was partially cell-contact-dependent and was associated with IL-10. In vivo, adoptively transferred NO-Tregs potently attenuated experimental autoimmune encephalomyelitis (EAE). The disease suppression was accompanied by a reduction of Th17, but not Th1 cells in the draining lymph nodes, and decrease in the production of IL-17, but increase in IL-10 synthesis. Our results therefore demonstrate the differential suppressive function between NO-Tregs and nTregs and indicate specialization of the regulatory mechanism of the immune system.
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