FoxOs enforce a progression checkpoint to constrain mTORC1-activated renal tumorigenesis.

FoxOs enforce a progression checkpoint to constrain mTORC1-activated renal tumorigenesis.
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DOI:
10.1016/j.ccr.2010.10.019
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发表时间:
2010-11-16
期刊:
影响因子:
50.3
通讯作者:
DePinho RA
DePinho RA
中科院分区:
医学1区
文献类型:
--
作者:
Gan B;Lim C;Chu G;Hua S;Ding Z;Collins M;Hu J;Jiang S;Fletcher-Sananikone E;Zhuang L;Chang M;Zheng H;Wang YA;Kwiatkowski DJ;Kaelin WG Jr;Signoretti S;DePinho RA

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mTORC1 is a validated therapeutic target for renal cell carcinoma (RCC). Here, analysis of Tsc1 deficient (mTORC1 hyperactivation) mice uncovered a FoxO-dependent negative feedback circuit constraining mTORC1-mediated renal tumorigenesis. We document robust FoxO activation in Tsc1 deficient benign polycystic kidneys and FoxO extinction upon progression to murine renal tumors; murine renal tumor progression upon genetic deletion of both Tsc1 and FoxOs; and down-regulated FoxO expression in most human renal clear cell and papillary carcinomas, yet continued expression in less aggressive RCCs and benign renal tumor subtypes. Mechanistically, integrated analyses revealed that FoxO-mediated block operates via suppression of Myc through up-regulation of the Myc antagonists, Mxi1-SRα and mir-145, establishing a FoxO-Mxi1-SRα/mir-145 axis as a major progression block in renal tumor development.
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