Metabolic control of regulatory T cell stability and function by TRAF3IP3 at the lysosome.

Metabolic control of regulatory T cell stability and function by TRAF3IP3 at the lysosome.
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溶酶体中 TRAF3IP3 对调节性 T 细胞稳定性和功能的代谢控制

DOI:
10.1084/jem.20180397
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发表时间:
2018-09-03
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Zou Q
Zou Q
中科院分区:
其他
文献类型:
--
作者:
Yu X;Teng XL;Wang F;Zheng Y;Qu G;Zhou Y;Hu Z;Wu Z;Chang Y;Chen L;Li HB;Su B;Lu L;Liu Z;Sun SC;Zou Q

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代谢程序对于调节性T(T reg)细胞的稳定性和功能至关重要,但是调节T reg细胞代谢的潜在机制是难以捉摸的。在这里,我们报告说,溶酶体TRAF 3 IP 3作为一个关键的调节器,在维持T细胞的代谢健身。Traf 3 ip 3的T reg特异性缺失损害T reg细胞功能,导致小鼠中炎症性疾病和更强的抗肿瘤T细胞应答的发展。雷帕霉素复合物1(mTORC 1)介导的过度糖酵解代谢的过度机制靶标是TRAF 3 IP 3缺陷型T reg细胞不稳定的原因。TRAF 3 IP 3通过将丝氨酸-苏氨酸磷酸酶催化亚基(PP 2Ac)募集到溶酶体中来限制mTORC 1信号传导,从而促进PP 2Ac与mTORC 1组分Raptor的相互作用。我们的研究结果将TRAF 3 IP 3定义为T reg细胞稳定性和功能的代谢调节因子,并表明溶酶体特异性mTORC 1信号传导机制调节T reg细胞代谢。
Metabolic programs are crucial for regulatory T (T reg) cell stability and function, but the underlying mechanisms that regulate T reg cell metabolism are elusive. Here, we report that lysosomal TRAF3IP3 acts as a pivotal regulator in the maintenance of T reg cell metabolic fitness. T reg–specific deletion of Traf3ip3 impairs T reg cell function, causing the development of inflammatory disorders and stronger antitumor T cell responses in mice. Excessive mechanistic target of rapamycin complex 1 (mTORC1)–mediated hyper-glycolytic metabolism is responsible for the instability of TRAF3IP3-deficient T reg cells. Mechanistically, TRAF3IP3 restricts mTORC1 signaling by recruiting the serine-threonine phosphatase catalytic subunit (PP2Ac) to the lysosome, thereby facilitating the interaction of PP2Ac with the mTORC1 component Raptor. Our results define TRAF3IP3 as a metabolic regulator in T reg cell stability and function and suggest a lysosome-specific mTORC1 signaling mechanism that regulates T reg cell metabolism.
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