ACTA1 and idiopathic pulmonary fibrosis: Treatment with TFG-β elicited an increment in the expression levels of Fn, vimentin, and α-SMA in both HFL1 cells and IPF fibroblasts, which were significantly reduced when LNA-anti-miR-301a was introduced into HFL1 cells and IPF fibroblasts (Figures 3C and 3D).