Abstract
The SWI/SNF chromatin remodeling complex is a master regulator of developmental cell-fate decisions, although the key target pathways are poorly characterized. Here, we interrogated the contribution of the SWI/SNF subunit and tumor suppressor SNF5 to the regulation of developmental pathways using conditional mouse and cell culture models. We find that loss of SNF5 phenocopies β-catenin hyperactivation and that SNF5 is essential for regulating Wnt/β-catenin pathway target expression. These data provide insight into chromatin-based mechanisms that underlie developmental regulation and elucidate the emerging theme that mutation of this tumor suppressor complex can activate developmental pathways by uncoupling them from upstream control.
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Acknowledgements
We thank ES McKenna for critical reading of the manuscript and A Lassar for helpful discussions. The in situ probe constructs were generously provided by C Tabin (Harvard Medical School). This work was supported in part by National Cancer Institute, National Institutes of Health Pre-Doctoral NRSA award 1F31CA130553 (ELMB), R01CA113794 (CWMR) and U01-1156106 (Stuart H Orkin). CWM R is a recipient of a Stand Up 2 Cancer Innovative Research Grant. Miles for Mary, The Garrett B Smith Foundation and Cure AT/RT Now provided additional support.
Author contributions: E.L.M-B initiated the studies, conducted experiments, analyzed data and contributed to writing the manuscript. Y.M., E.J.T, Y-J.C. and C.S.T conducted experiments and analyzed data. S.L.P and W.S. supervised portions of the studies and assisted in the data analysis. C.W.M.R supervised the studies, assisted in the data analysis and contributed to the writing of the manuscript.
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Mora-Blanco, E., Mishina, Y., Tillman, E. et al. Activation of β-catenin/TCF targets following loss of the tumor suppressor SNF5. Oncogene 33, 933–938 (2014). https://doi.org/10.1038/onc.2013.37
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DOI: https://doi.org/10.1038/onc.2013.37
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