Abstract:
:Transforming growth factor-beta (TGF-beta) signaling in endothelial cells is able to modulate angiogenesis and vascular remodeling, although the underlying molecular mechanisms remain poorly understood. Endoglin and ALK-1 are components of the TGF-beta receptor complex, predominantly expressed in endothelial cells, and mutations in either endoglin or ALK-1 genes are responsible for the vascular dysplasia known as hereditary hemorrhagic telangiectasia. Here we find that the extracellular and cytoplasmic domains of the auxiliary TGF-beta receptor endoglin interact with ALK-1 (a type I TGF-beta receptor). In addition, endoglin potentiates TGF-beta/ALK1 signaling, with the extracellular domain of endoglin contributing to this functional cooperation between endoglin and ALK-1. By contrast, endoglin appears to interfere with TGF-beta/ALK-5 signaling. These results suggest that the functional association of endoglin with ALK-1 is critical for the endothelial responses to TGF-beta.
journal_name
J Cell Physioljournal_title
Journal of cellular physiologyauthors
Blanco FJ,Santibanez JF,Guerrero-Esteo M,Langa C,Vary CP,Bernabeu Cdoi
10.1002/jcp.20311keywords:
subject
Has Abstractpub_date
2005-08-01 00:00:00pages
574-84issue
2eissn
0021-9541issn
1097-4652journal_volume
204pub_type
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