TGFB1 and idiopathic pulmonary fibrosis: The Ab-31 antibody effectively blocked the binding of αv integrins to a wide range of ligands containing the arginyl–glycyl–aspartic acid (RGD) sequence and inhibited cell adhesion by suppressing both latent transforming growth factor-β (TGF-β) activation and smooth-muscle α-actin expression induced by activated TGF-β in lung fibroblasts in IPF patients.