Samenvatting
The adenomatous polyposis coli (APC) tumor suppressor protein binds to β-catenin, a protein recently shown to interact with Tcf and Lef transcription factors. The gene encoding hTcf-4, a Tcf family member that is expressed in colonic epithelium, was cloned and characterized. hTcf-4 transactivates transcription only when associated with β-catenin. Nuclei of APC(-/-) colon carcinoma cells were found to contain a stable β-catenin hTcf-4 complex that was constitutively active, as measured by transcription of a Tcf reporter gene. Reintroduction of APC removed β-catenin from hTcf-4 and abrogated the transcriptional transactivation. Constitutive transcription of Tcf target genes, caused by loss of APC function, may be a crucial event in the early transformation of colonic epithelium.
| Originele taal-2 | Engels |
|---|---|
| Pagina's (van-tot) | 1784-1787 |
| Aantal pagina's | 4 |
| Tijdschrift | Science |
| Volume | 275 |
| Nummer van het tijdschrift | 5307 |
| DOI's | |
| Status | Gepubliceerd - 21 mrt. 1997 |
| Extern gepubliceerd | Ja |