Journal
CURRENT OPINION IN CELL BIOLOGY
Volume 16, Issue 5, Pages 552-557Publisher
CURRENT BIOLOGY LTD
DOI: 10.1016/j.ceb.2004.06.017
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The five integrins that contain the alphav subunit are widely expressed and their expression is tightly regulated. However, most tissues in mice lacking the alphav subunit, and thus deficient in all five integrins, develop normally, suggesting that nearly all of the critical steps in development and cellular differentiation can occur in the absence of these integrins. Studies over the past few years have identified highly specialized roles for specific alphav integrins in preventing inappropriate vascular growth and in control of vascular permeability. Two members of this family, alphavbeta6 and alphavbeta8, play novel roles in activating latent complexes of the growth factor TGFbeta (transforming growth factor beta). Studies in mice lacking the beta6 subunit have identified unexpected roles for alphavbeta6-mediated TGFbeta activation in models of pulmonary and renal fibrosis, acute lung injury and pulmonary emphysema.
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