The guanine exchange factor Net1 is induced upon TGF-beta stimulation during transdifferentiation of hepatic stellate cells
R Müller, M Kreuzaler, HM Said, AM Gressner, S Dooley · Zeitschrift für Gastroenterologie · 2004 · Heft 02
Bibliografische Angaben
Zusammenfassung
Activation of hepatic stellate cells (HSC), the key fibrogenic cell type inside the liver, is mediated by TGF-beta. One hallmark of TGF-beta mediated transdifferentiation is the reorganization of the actin cytoskeleton. Actin reorganization requires activity of RhoA GTPase, which is activated by a Smad-dependent mechanism after stimulation with TGF-beta. Moreover RhoA activity may be related to the amount of Net1 protein, a specific guanine exchange factor for RhoA. We are interested in antifibrotic strategies, ideally by suppressing only the fibrotic action of TGF-beta, without compromising normal defence, tumo…