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
中科院分区:
文献类型:
--
作者:
Thomas JD;Zhang YJ;Wei YH;Cho JH;Morris LE;Wang HY;Zheng XF
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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