Identification of RUNX3 as a component of the MST/Hpo signaling pathway
- Authors
- Min, Boram; Kim, Min-Kyu; Zhang, Joo-Won; Kim, Jiyeon; Chung, Kwang-Chul; Oh, Byung-Chul; Stein, Gary S.; Lee, Yong-Hee; van Wijnen, Andre J.; Bae, Suk-Chul
- Issue Date
- Feb-2012
- Publisher
- WILEY-BLACKWELL
- Citation
- JOURNAL OF CELLULAR PHYSIOLOGY, v.227, no.2, pp.839 - 849
- Journal Title
- JOURNAL OF CELLULAR PHYSIOLOGY
- Volume
- 227
- Number
- 2
- Start Page
- 839
- End Page
- 849
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/16603
- DOI
- 10.1002/jcp.22887
- ISSN
- 0021-9541
- Abstract
- Recent genetic screens of fly mutants and molecular analysis have revealed that the Hippo (Hpo) pathway controls both cell proliferation and cell death. Deregulation of its human counterpart (the MST pathway) has been implicated in human cancers. However, how this pathway is linked with the known tumor suppressor network remains to be established. RUNX3 functions as a tumor suppressor of gastric cancer, lung cancer, bladder cancer, and colon cancer. Here, we show that RUNX3 is a principal and evolutionarily conserved component of the MST pathway. SAV1/WW45 facilitates the close association between MST2 and RUNX3. MST2, in turn, stimulates the SAV1RUNX3 interaction. In addition, we show that siRNA-mediated RUNX3 knockdown abolishes MST/Hpo-mediated cell death. By establishing that RUNX3 is an endpoint effector of the MST pathway and that RUNX3 is capable of inducing cell death in cooperation with MST and SAV1, we define an evolutionarily conserved novel regulatory mechanism loop for tumor suppression in human cancers. J. Cell. Physiol. 227: 839849, 2012. (C) 2011 Wiley Periodicals, Inc.
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