The cyclin D1 gene is a target of the beta-catenin/LEF-1 pathway
Michael Shtutman,Jacob Zhurinsky,Inbal Simcha,Chris Albanese,Mark D'Amico,Richard G. Pestell,Avri Ben-Ze'ev +6 more
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TLDR
Increased beta-catenin levels may promote neoplastic conversion by triggering cyclin D1 gene expression and, consequently, uncontrolled progression into the cell cycle through a LEF-1 binding site in the cyclinD1 promoter.Abstract:
β-Catenin plays a dual role in the cell: one in linking the cytoplasmic side of cadherin-mediated cell–cell contacts to the actin cytoskeleton and an additional role in signaling that involves transactivation in complex with transcription factors of the lymphoid enhancing factor (LEF-1) family. Elevated β-catenin levels in colorectal cancer caused by mutations in β-catenin or by the adenomatous polyposis coli molecule, which regulates β-catenin degradation, result in the binding of β-catenin to LEF-1 and increased transcriptional activation of mostly unknown target genes. Here, we show that the cyclin D1 gene is a direct target for transactivation by the β-catenin/LEF-1 pathway through a LEF-1 binding site in the cyclin D1 promoter. Inhibitors of β-catenin activation, wild-type adenomatous polyposis coli, axin, and the cytoplasmic tail of cadherin suppressed cyclin D1 promoter activity in colon cancer cells. Cyclin D1 protein levels were induced by β-catenin overexpression and reduced in cells overexpressing the cadherin cytoplasmic domain. Increased β-catenin levels may thus promote neoplastic conversion by triggering cyclin D1 gene expression and, consequently, uncontrolled progression into the cell cycle.read more
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References
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Journal ArticleDOI
Cancer Cell Cycles
TL;DR: Genetic alterations affecting p16INK4a and cyclin D1, proteins that govern phosphorylation of the retinoblastoma protein and control exit from the G1 phase of the cell cycle, are so frequent in human cancers that inactivation of this pathway may well be necessary for tumor development.
Journal ArticleDOI
Identification of c-MYC as a Target of the APC Pathway
Tong-Chuan He,Andrew B. Sparks,Carlo Rago,Heiko Hermeking,Leigh Zawel,Luis T. da Costa,Patrice J. Morin,Bert Vogelstein,Kenneth W. Kinzler +8 more
TL;DR: The c-MYC oncogene is identified as a target gene in this signaling pathway and shown to be repressed by wild-type APC and activated by beta-catenin, and these effects were mediated through Tcf-4 binding sites in the c- MYC promoter.
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Rapid detection of octamer binding proteins with ‘mini extracts’, prepared from a small number of cells
Journal ArticleDOI
Activation of β-Catenin-Tcf Signaling in Colon Cancer by Mutations in β-Catenin or APC
Patrice J. Morin,Andrew B. Sparks,Vladimir Korinek,Nick Barker,Hans Clevers,Bert Vogelstein,Kenneth W. Kinzler +6 more
TL;DR: Results indicate that regulation of β-catenin is critical to APC's tumor suppressive effect and that this regulation can be circumvented by mutations in either APC or β- catenin.
Journal ArticleDOI
Constitutive Transcriptional Activation by a β-Catenin-Tcf Complex in APC−/− Colon Carcinoma
Vladimir Korinek,Nick Barker,Patrice J. Morin,Dick F. van Wichen,Roel A. de Weger,Kenneth W. Kinzler,Bert Vogelstein,Hans Clevers +7 more
TL;DR: Constitutive transcription of Tcf target genes, caused by loss of APC function, may be a crucial event in the early transformation of colonic epithelium.
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