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Basic FGF and TGF-beta differentially modulate integrin expression of human microvascular endothelial cells.

Abstract：

:Basic fibroblast growth factor (bFGF) and transforming growth factor-beta (TGF-beta) are known to alter the migratory and proliferative capacity of endothelial cells in vitro and to stimulate angiogenesis in vivo. One mechanism by which these cytokines induce their effects may be through the regulation of integrin adhesion receptor expression and activity. We examined the ability of these growth factors to modulate the expression of specific integrins in human microvascular endothelial cells (MEC). Immunoprecipitation of metabolically labeled MEC showed that bFGF upregulated the biosynthesis of alpha 2, alpha 5, beta 1, and beta 3. bFGF induced an increase in the levels of mRNA for alpha 2 and beta 1. TGF-beta increased synthesis of alpha 2, alpha 5, and beta 1. These results suggest that bFGF and TGF-beta selectively alter integrin profiles and influence interactions of MEC with the extracellular matrix during neovascularization. In particular, the upregulation of the collagen/laminin receptor, alpha 2 beta 1, by bFGF may provide activated endothelial cells with an enhanced capacity to migrate through both their underlying basement membrane and the interstitial matrix.

journal_name

Exp Cell Res

journal_title

Experimental cell research

authors

Enenstein J,Waleh NS,Kramer RH

doi

10.1016/0014-4827(92)90028-7

keywords:

subject

Has Abstract

pub_date

1992-12-01 00:00:00

pages

499-503

issue

2

eissn

0014-4827

issn

1090-2422

journal_volume

203

pub_type

杂志文章

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