mTORC2 regulates multiple aspects of NKT-cell development and function.

mTORC2 regulates multiple aspects of NKT-cell development and function.
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DOI:
10.1002/eji.201646343
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发表时间:
2017-03
影响因子:
5.4
通讯作者:
Jordan MS
Jordan MS
中科院分区:
医学3区
文献类型:
--
作者:
Sklarz T;Guan P;Gohil M;Cotton RM;Ge MQ;Haczku A;Das R;Jordan MS

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不变NKT (iNKT)细胞在TCR识别脂质抗原后,通过快速分泌细胞因子和裂解靶点,架起先天免疫和适应性免疫的桥梁。根据inkt细胞分泌IFN-γ、IL-4和IL-17A的能力,inkt细胞分别被分类为NKT-1、NKT-2和NKT-17亚群。调控inkt细胞命运的分子途径尚未完全确定。最近的研究表明,mTORC2的一个必需组分Rictor参与了inkt细胞亚群的发育,然而这些报道是相互矛盾的。为了解决这些问题,我们使用了Rictorfl/fl CD4cre+小鼠,发现Rictor是NKT-17细胞发育和正常inkt细胞溶解功能所必需的。相反,IL-4和IFN-γ的产生并不绝对需要Rictor,因为外周inkt细胞会产生大量的这些细胞因子。在没有Rictor的情况下,inkt细胞的总数急剧减少。我们提供的数据表明,Rictor调节细胞存活以及发育和成熟inkt细胞的增殖。因此,mTORC2调控inkt细胞发育和功能的多个方面。
Invariant NKT (iNKT) cells bridge innate and adaptive immunity by rapidly secreting cytokines and lysing targets following TCR recognition of lipid antigens. Based on their ability to secrete IFN-γ, IL-4 and IL-17A, iNKT-cells are classified as NKT-1, NKT-2 and NKT-17 subsets, respectively. The molecular pathways regulating iNKT-cell fate are not fully defined. Recent studies implicate Rictor, a required component of mTORC2, in the development of select iNKT-cell subsets, however these reports are conflicting. To resolve these questions, we used Rictorfl/fl CD4cre+ mice and found that Rictor is required for NKT-17 cell development and normal iNKT-cell cytolytic function. Conversely, Rictor is not absolutely required for IL-4 and IFN-γ production as peripheral iNKT-cells make copious amounts of these cytokines. Overall iNKT-cell numbers are dramatically reduced in the absence of Rictor. We provide data indicating Rictor regulates cell survival as well as proliferation of developing and mature iNKT-cells. Thus, mTORC2 regulates multiple aspects of iNKT-cell development and function.
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