Smad3-dependent nuclear translocation of beta-catenin is required for TGF-beta1-induced proliferation of bone marrow-derived adult human mesenchymal stem cells.

Published

Journal Article

Adult mesenchymal stem cells (MSCs) derived from bone marrow contribute to the regeneration of multiple types of mesenchymal tissues. Here we describe the functional role of a novel form of cross-talk between the transforming growth factor beta1 (TGF-beta1) and Wnt signaling pathways in regulating the activities of human MSCs. We show that TGF-beta1 induces rapid nuclear translocation of beta-catenin in MSCs in a Smad3-dependent manner. Functionally, this pathway is required for the stimulation of MSC proliferation and the inhibition of MSC osteogenic differentiation by TGF-beta1, likely through the regulation of specific downstream target genes. These results provide evidence for a new mode of cooperation between the TGF-beta and Wnt signaling pathways in this specific cellular context and suggest a potentially important role for this distinct signaling pathway in the control of self-renewal and differentiation of a specific type of MSCs.

Full Text

Duke Authors

Cited Authors

  • Jian, H; Shen, X; Liu, I; Semenov, M; He, X; Wang, X-F

Published Date

  • March 15, 2006

Published In

Volume / Issue

  • 20 / 6

Start / End Page

  • 666 - 674

PubMed ID

  • 16543220

Pubmed Central ID

  • 16543220

International Standard Serial Number (ISSN)

  • 0890-9369

Digital Object Identifier (DOI)

  • 10.1101/gad.1388806

Language

  • eng

Conference Location

  • United States