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- W2314458206 abstract "Signal transduction by β-catenin involves its post-translational stabilization and import to the nucleus where it interacts with transcription factors. Recent implications for β-catenin signaling in cancer prompted us to examine colon cancer cell lines for the expression of LEF-1, a transcription factor that binds to β-catenin. The analysis of several cell lines revealed the expression of LEF1 mRNA and a constitutive association of the LEF-1 protein with β-catenin. In contrast to the colon cells, PC12 and 293 cells did not contain a β-catenin-LEF-1 complex, even though both proteins were detected in cell lysates. In these cells, the association of endogenous LEF1 and β-catenin was induced by stimulation with the wnt-1 proto-oncogene. The complex formed following transient stimulation with wnt-1 and also persisted in cells stably expressing wnt-1. Ectopic overexpression of β-catenin in 293 cells also induced the assembly of the β-catenin-LEF-1 complex and activated gene transcription from a LEF-1-dependent promotor. Expression of mutant oncogenic forms of β-catenin identified in cancer cells resulted in higher levels of transcriptional activity. The results suggest that a cancer pathway driven by wnt-1, or mutant forms of β-catenin, may involve the formation of a persistent transcriptionally active complex of β-catenin and LEF1." @default.
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- W2314458206 date "1997-12-04" @default.
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- W2314458206 title "Induction of a β-catenin-LEF-1 complex by wnt-1 and transforming mutants of β-catenin" @default.
- W2314458206 doi "https://doi.org/10.1038/sj.onc.1201462" @default.
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