| Literature DB >> 10693808 |
M Nishita1, M K Hashimoto, S Ogata, M N Laurent, N Ueno, H Shibuya, K W Cho.
Abstract
Members of the Wnt and TGF-beta superfamilies regulate both cell fate and proliferation during development and tissue maintenance. In the early amphibian embryo, the Wnt and TGF-beta superfamily signalling cascades are required for the establishment of a dorsal signalling centre, Spemann's organizer. Intracellular proteins of both pathways, upon activation, translocate to the nucleus to participate in transcription. Here we show that beta-catenin and Lef1/Tcf, which are downstream components of the Wnt signalling cascade, form a complex with Smad4, an essential mediator of signals initiated by members of the TGF-beta growth factor superfamily. In Xenopus, this interaction directly and synergistically affects expression of the twin (Xtwn) gene during formation of the organizer. This is, to our knowledge, the first demonstration of a physical interaction between TGF-beta and Wnt signalling components in vivo.Entities:
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Year: 2000 PMID： 10693808 DOI： 10.1038/35001602
Source DB: PubMed Journal: Nature ISSN： 0028-0836 Impact factor: 49.962