Rab1A is an mTORC1 activator and a colorectal oncogene.

Rab1A is an mTORC1 activator and a colorectal oncogene.
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DOI:
10.1016/j.ccell.2014.09.008
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发表时间:
2014-11-10
期刊:
影响因子:
50.3
通讯作者:
Zheng XF
Zheng XF
中科院分区:
医学1区
文献类型:
--
作者:
Thomas JD;Zhang YJ;Wei YH;Cho JH;Morris LE;Wang HY;Zheng XF

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氨基酸(AA)是一种有效的有丝分裂原,控制生长和代谢。在这里,我们描述的Rab 1作为一个保守的AA信号调节mTORC 1的鉴定。AA刺激Rab 1A GTP结合和与mTORC 1的相互作用,以及Rheb-mTORC 1在高尔基体中的相互作用。Rab 1A过表达以AA和mTORC 1依赖的方式促进mTORC 1信号传导和致癌生长。相反,Rab 1A敲低选择性地减弱Rab 1过表达癌细胞的致癌生长。此外,Rab 1A在结直肠癌(CRC)中过表达,这与mTORC 1信号升高、肿瘤侵袭、进展和预后不良相关。我们的研究结果表明,Rab 1是mTORC 1激活剂和致癌基因,并且通过Rab 1A过表达的过度活跃的AA信号传导驱动肿瘤发生并使癌细胞易于接受mTORC 1靶向治疗。
Amino acid (AA) is a potent mitogen that controls growth and metabolism. Here we describe the identification of Rab1 as a conserved regulator of AA signaling to mTORC1. AA stimulates Rab1A GTP-binding and interaction with mTORC1, and Rheb-mTORC1 interaction in the Golgi. Rab1A overexpression promotes mTORC1 signaling and oncogenic growth in an AA- and mTORC1-dependent manner. Conversely, Rab1A knockdown selectively attenuates oncogenic growth of Rab1-overexpressing cancer cells. Moreover, Rab1A is overexpressed in colorectal cancer (CRC), which is correlated with elevated mTORC1 signaling, tumor invasion, progression and poor prognosis. Our results demonstrate that Rab1 is a mTORC1 activator and an oncogene, and that hyperactive AA signaling through Rab1A overexpression drives oncogenesis and renders cancer cells prone to mTORC1-targeted therapy.
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