ACTA1 and pulmonary fibrosis: MV-induced pulmonary fibrosis in integrin β3-deficient mice was alleviated by downregulating collagen deposition (Figure 7A, Figure S7A), collagen I and α-SMA contents (Figure 7B), fibronectin+/collagen+ fibroblasts in pulmonary tissue (Figure 8B, Figure S8B) and PICP in BALF (Figure 8D).