Activation of latent TGFβ by αvβ 1 integrin: of potential importance in myofibroblast activation in fibrosis.
Cell-mediated activation of latent TGF-β1 is intimately involved with tissue repair and fibrosis in all organs. Previously, it was shown that the integrin β1 subunit was required for activation of latent TGF-β1 and skin fibrosis. A recent study by Henderson and colleagues (Nature Medicine 19,1617-1624, 2013) used three different in vivo models of fibrosis to show that integrin αv subunit was required for fibrogenesis. Through a process of elimination, the authors conclude that in vivo, the little-studied αvβ1 could be the major integrin responsible for TGF-β activation by myofibroblasts. Thus targeting this integrin might be a useful therapy for fibrosis.
Department of Dentistry, University of Western Ontario, Dental Sciences Building, London, ON, N6A 5C1, Canada, Andrew.Leask@schulich.uwo.ca.
Andrew
A
Leask
James
J
Hutchenreuther