Mammalian target of rapamycin complex 2 regulates invariant NKT cell development and function independent of promyelocytic leukemia zinc-finger.

Mammalian target of rapamycin complex 2 regulates invariant NKT cell development and function independent of promyelocytic leukemia zinc-finger.
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DOI:
10.4049/jimmunol.1401985
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发表时间:
2015-01-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Chang CH
Chang CH
中科院分区:
其他
文献类型:
--
作者:
Prevot N;Pyaram K;Bischoff E;Sen JM;Powell JD;Chang CH

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The mammalian target of rapamycin (mTOR) senses and incorporates different environmental cues via the two signaling complexes mTORC1 and mTORC2. As a result, mTOR controls cell growth and survival and also shapes different effector functions of the cells including immune cells such as T cells. We demonstrate here that iNKT cell development is controlled by mTORC2 in a cell-intrinsic manner. In mice deficient in mTORC2 signaling due to the conditional deletion of the Rictor gene, iNKT cell numbers were reduced in the thymus and periphery. This is caused by decreased proliferation of stage 1 iNKT cells and poor development through subsequent stages. Functionally, iNKT cells devoid of mTORC2 signaling showed reduced number of IL-4-expressing cells, which correlated with a decrease in the transcription factor GATA-3-expressing cells. However, promyelocytic leukemia zinc-finger (PLZF), a critical transcription factor for iNKT cell development, is expressed at a similar level in mTORC2 deficient iNKT cells compared to that in the wild type iNKT cells. Furthermore, cellular localization of PLZF was not altered in the absence of mTOR2 signaling. Thus, our study reveals the PLZF-independent mechanisms of the development and function of iNKT cells regulated by mTORC2.
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