Of the 239 TGF-β1–dependent differentially regulated miRNAs in cultured lung fibroblasts, 195 were common to normal and IPF fibroblasts, whereas 21 were unique to normal fibroblasts and 23 were unique to the IPF cultured fibroblasts (Figure 9A). Here, TGFB1 is linked to idiopathic pulmonary fibrosis.