Bona Fide Th17 Cells without Th1 Functional Plasticity Protect against Influenza.

Bona Fide Th17 Cells without Th1 Functional Plasticity Protect against Influenza.
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DOI:
10.4049/jimmunol.2100801
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发表时间:
2022-04-15
影响因子:
4.4
通讯作者:
McKinstry, Karl Kai
McKinstry, Karl Kai
中科院分区:
医学2区
文献类型:
--
作者:
Dhume, Kunal;Finn, Caroline M.;Devarajan, Priyadharshini;Singh, Ayushi;Tejero, Joanne D.;Prokop, Emily;Strutt, Tara M.;Sell, Stewart;Swain, Susan L.;McKinstry, Karl Kai

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CD4T细胞预防甲型流感病毒(IAV)所需的最佳转录程序尚不清楚。大多数IAV免疫的CD4T细胞符合Th1标准。然而,缺乏Th1‘主调节器’T-bet的细胞,虽然以Th1同一性降低为标志,但仍保持着强大的保护能力。在这里,我们证明了T-bet的Paralog,Eomesodermin,在T-bet存在的情况下在很大程度上是多余的,但对于T-bet缺陷细胞的剩余Th1属性是必不可少的。缺乏T-bet和Eomesodermin的细胞在感染的肺中由特定的炎症信号驱动同时产生Th17和Th2反应。此外,T-bet和eome缺陷的Th17,而不是Th2,效应细胞的转移可以保护小鼠免受致命的IAV感染。重要的是,这些多功能的Th17效应器在体内没有表现出功能可塑性,促进了野生型Th17细胞中Th1属性的获得,这给许多研究中对Th17编程的保护性质的评估蒙上了一层阴影。最后,我们发现,尽管存在强烈的Th17偏向的炎症反应,但在T-bet和eome双缺陷小鼠中,尽管存在强烈的Th17偏向的炎症反应,但初级和异亚型IAV挑战在没有增加发病率的情况下被有效地清除。因此,我们的研究表明,针对IAV的未掺杂Th17反应具有出人意料的强大抗病毒能力,这对疫苗设计具有重要意义。
Optimal transcriptional programming needed for CD4 T cells to protect against influenza A virus (IAV) is unclear. Most IAV-primed CD4 T cells fit Th1 criteria. However, cells deficient for the Th1 ‘master regulator’, T-bet, while marked by reduced Th1 identity, retain robust protective capacity. Here, we show that T-bet’s paralog, Eomesodermin, is largely redundant in the presence of T-bet but is essential for the residual Th1 attributes of T-bet-deficient cells. Cells lacking both T-bet and Eomesodermin instead develop concurrent Th17 and Th2 responses driven by specific inflammatory signals in the infected lung. Furthermore, the transfer of T-bet- and Eomes-deficient Th17, but not Th2, effector cells protects mice from lethal IAV infection. Importantly, these polyfunctional Th17 effectors do not display functional plasticity in vivo promoting gain of Th1 attributes seen in wildtype Th17 cells which has clouded evaluation of the protective nature of Th17 programming in many studies. Finally, we show that primary and heterosubtypic IAV challenge is efficiently cleared in T-bet- and Eomes double-deficient mice without enhanced morbidity despite a strongly Th17-biased inflammatory response. Our studies thus demonstrate unexpectedly potent antiviral capacity of unadulterated Th17 responses against IAV, with important implications for vaccine design.
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