THY1 and idiopathic pulmonary fibrosis: Interaction of Thy-1 with β integrins mediates MSC-derived extracellular vesicle uptake by lung fibroblasts, which blocks myofibroblastic differentiation; MSC-derived extracellular vesicles are enriched for miRs that target profibrotic genes upregulated in IPF fibroblasts (Shentu, Huang et al., 2017).