Divergent Role for STAT5 in the Adaptive Responses of Natural Killer Cells.

Divergent Role for STAT5 in the Adaptive Responses of Natural Killer Cells.
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DOI:
10.1016/j.celrep.2020.108498
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发表时间:
2020-12-15
期刊:
影响因子:
8.8
通讯作者:
Sun JC
Sun JC
中科院分区:
生物学1区
文献类型:
--
作者:
Wiedemann GM;Grassmann S;Lau CM;Rapp M;Villarino AV;Friedrich C;Gasteiger G;O'Shea JJ;Sun JC

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自然杀伤(NK)细胞是天生的淋巴细胞,具有诱导适应性特征的能力,包括克隆增殖和免疫记忆。由于信号转导和转录激活因子5(STAT5)对NK细胞的发育是必不可少的,因此该转录因子及其上游细胞因子IL-2和IL-15在感染过程中的作用尚未被仔细研究。在这项研究中,我们研究了STAT5如何在病毒感染过程中调节转录。我们证明了在感染后早期,IL-12和STAT4在NK细胞中诱导了STAT5,并且部分STAT5缺乏导致NK细胞产生长寿命记忆细胞的能力缺陷。此外,我们发现在病毒感染期间IL-2和IL-15信号输出的功能二分法,这两种细胞因子都驱动克隆性扩张,但只有IL-15是记忆NK细胞生存所必需的。因此,我们强调了STAT5信号在促进最佳的抗病毒NK细胞反应中的作用。Wiedemann等人。证明MCMV感染后NK细胞中的Stat5a和Stat5b受IL-12和STAT4信号的诱导。进一步证明,STAT5上游的细胞因子IL-2和IL-15不同地促进适应性NK细胞对MCMV感染的早期和晚期反应。
Natural killer (NK) cells are innate lymphocytes with the capacity to elicit adaptive features, including clonal expansion and immunological memory. Because signal transducer and activator of transcription 5 (STAT5) is essential for NK cell development, the roles of this transcription factor and its upstream cytokines interleukin-2 (IL-2) and IL-15 during infection have not been carefully investigated. In this study, we investigate how STAT5 regulates transcription during viral infection. We demonstrate that STAT5 is induced in NK cells by IL-12 and STAT4 early after infection and that partial STAT5 deficiency results in a defective capacity of NK cells to generate long-lived memory cells. Furthermore, we find a functional dichotomy of IL-2 and IL-15 signaling outputs during viral infection, whereby both cytokines drive clonal expansion, but only IL-15 is required for memory NK cell survival. We thus highlight a role for STAT5 signaling in promoting an optimal anti-viral NK cell response. Wiedemann et al. demonstrate that Stat5a and Stat5b are induced by IL-12 and STAT4 signaling in NK cells following MCMV infection. They further provide evidence that the cytokines IL-2 and IL-15 upstream of STAT5 differentially promote the early and late stages of the adaptive NK cell response to MCMV infection.
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