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MTOR complex 2 is required for the development of prostate cancer induced by Pten loss in mice.

ABSTRACT: mTOR complex 2 (mTORC2) contains the mammalian target of rapamycin (mTOR) kinase and the Rictor regulatory protein and phosphorylates Akt. Whether this function of mTORC2 is critical for cancer progression is unknown. Here, we show that transformed human prostate epithelial cells lacking PTEN require mTORC2 to form tumors when injected into nude mice. Furthermore, we find that Rictor is a haploinsufficient gene and that deleting one copy protects Pten heterozygous mice from prostate cancer. Finally, we show that the development of prostate cancer caused by Pten deletion specifically in prostate epithelium requires mTORC2, but that for normal prostate epithelial cells, mTORC2 activity is nonessential. The selective requirement for mTORC2 in tumor development suggests that mTORC2 inhibitors may be of substantial clinical utility.

SUBMITTER: Guertin DA

PROVIDER: S-EPMC2701381 | biostudies-literature | 2009 Feb

REPOSITORIES: biostudies-literature

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mTOR complex 2 is required for the development of prostate cancer induced by Pten loss in mice.

Guertin David A DA Stevens Deanna M DM Saitoh Maki M Kinkel Stephanie S Crosby Katherine K Sheen Joon-Ho JH Mullholland David J DJ Magnuson Mark A MA Wu Hong H Sabatini David M DM

Cancer cell 20090201 2

mTOR complex 2 (mTORC2) contains the mammalian target of rapamycin (mTOR) kinase and the Rictor regulatory protein and phosphorylates Akt. Whether this function of mTORC2 is critical for cancer progression is unknown. Here, we show that transformed human prostate epithelial cells lacking PTEN require mTORC2 to form tumors when injected into nude mice. Furthermore, we find that Rictor is a haploinsufficient gene and that deleting one copy protects Pten heterozygous mice from prostate cancer. Fina ...[more]

PMID: 19185849

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