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Genes Dev. 2010 Nov 1;24(21):2383-8. doi: 10.1101/gad.1978810.

The Hippo signaling pathway restricts the oncogenic potential of an intestinal regeneration program.

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1
Department of Molecular Biology and Genetics, Howard Hughes Medical Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA.

Abstract

Although a developmental role for Hippo signaling in organ size control is well appreciated, how this pathway functions in tissue regeneration is largely unknown. Here we address this issue using a dextran sodium sulfate (DSS)-induced colonic regeneration model. We find that regenerating crypts express elevated Yes-associated protein (YAP) levels. Inactivation of YAP causes no obvious intestinal defects under normal homeostasis, but severely impairs DSS-induced intestinal regeneration. Conversely, hyperactivation of YAP results in widespread early-onset polyp formation following DSS treatment. Thus, the YAP oncoprotein must be exquisitely controlled in tissue regeneration to allow compensatory proliferation and prevent the intrinsic oncogenic potential of a tissue regeneration program.

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PMID:
21041407
PMCID:
PMC2964748
DOI:
10.1101/gad.1978810
[Indexed for MEDLINE]
Free PMC Article

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