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. 2002 Oct 18;111(2):241-50.
doi: 10.1016/s0092-8674(02)01014-0.

The beta-catenin/TCF-4 complex imposes a crypt progenitor phenotype on colorectal cancer cells

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Free article

The beta-catenin/TCF-4 complex imposes a crypt progenitor phenotype on colorectal cancer cells

Marc van de Wetering et al. Cell. .
Free article

Abstract

The transactivation of TCF target genes induced by Wnt pathway mutations constitutes the primary transforming event in colorectal cancer (CRC). We show that disruption of beta-catenin/TCF-4 activity in CRC cells induces a rapid G1 arrest and blocks a genetic program that is physiologically active in the proliferative compartment of colon crypts. Coincidently, an intestinal differentiation program is induced. The TCF-4 target gene c-MYC plays a central role in this switch by direct repression of the p21(CIP1/WAF1) promoter. Following disruption of beta-catenin/TCF-4 activity, the decreased expression of c-MYC releases p21(CIP1/WAF1) transcription, which in turn mediates G1 arrest and differentiation. Thus, the beta-catenin/TCF-4 complex constitutes the master switch that controls proliferation versus differentiation in healthy and malignant intestinal epithelial cells.

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