Sin1-mTORC2 suppresses rag and il7r gene expression through Akt2 in B cells.
Sin1-mTORC2 suppresses rag and il7r gene expression through Akt2 in B cells.
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DOI:
10.1016/j.molcel.2010.07.031
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发表时间:
2010-08-13
期刊:
影响因子:
16
通讯作者:
Su B
中科院分区:
文献类型:
--
作者:
Lazorchak AS;Liu D;Facchinetti V;Di Lorenzo A;Sessa WC;Schatz DG;Su B
Mammalian target of rapamycin (mTOR) is an important mediator of phosphoinositol-3-kinase (PI3K) signaling. PI3K signaling regulates B cell development, homeostasis and immune responses. However, the function and molecular mechanism of mTOR mediated PI3K signaling in B cells has not been fully elucidated. Here we show that Sin1, an essential component of mTOR complex 2 (mTORC2), regulates B cell development. Sin1 deficiency results in increased IL-7 receptor (il7r) and RAG recombinase (rag1 and rag2) gene expression leading to enhanced pro-B cell survival and augmented V(D)J recombinase activity. We further show that Akt2 specifically mediates the Sin1-mTORC2 dependent suppression of il7r and rag gene expression in B cells by regulating FoxO1 phosphorylation. Finally, we demonstrate that the mTOR inhibitor rapamycin induces rag expression and promotes V(D)J recombination in B cells. Our study reveals that the Sin1/mTORC2-Akt2 signaling axis is a key regulator of FoxO1 transcriptional activity in B cells.
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影响因子:
30.5
作者:
通讯作者:
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影响因子:
30.5
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通讯作者:
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影响因子:
7.3
作者:
Guertin, David A.;Sabatini, David M.
通讯作者:
Sabatini, David M.
影响因子:
64.5
作者:
Jacinto, Estela;Facchinetti, Valeria;Su, Bing
通讯作者:
Su, Bing
影响因子:
64.5
作者:
SCHATZ, DG;OETTINGER, MA;BALTIMORE, D
通讯作者:
BALTIMORE, D