| Literature DB >> 16352713 |
Desheng Lu1, Howard B Cottam, Maripat Corr, Dennis A Carson.
Abstract
Activation of the Wnt/beta-catenin pathway promotes the development of several cancers and is an attractive target for chemopreventive and chemotherapeutic agents. Nonsteroidal antiinflammatory drugs (NSAIDs) have been reported to antagonize beta-catenin function, but their mechanism of action is not known. We demonstrate here that interference with beta-catenin function by NSAIDs does not correlate with cyclooxygenase (COX) inhibition. Instead, NSAID inhibition of beta-catenin requires the high level expression of peroxisome proliferator-activated receptor gamma (PPAR-gamma) and its co-receptor retinoid-X-receptor alpha (RXR-alpha). Immunoprecipitation experiments show that beta-catenin interacts with RXR-alpha and PPAR-gamma in some malignant cells. Repression of beta-catenin-dependent transcription by NSAIDs is thus indirect and depends on the coexpression of other nuclear receptors.Entities:
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Year: 2005 PMID: 16352713 PMCID: PMC1317972 DOI: 10.1073/pnas.0509316102
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN: 0027-8424 Impact factor: 11.205