In a study by Liu and colleagues in the mice silica‐induced lung fibrosis model, the overexpression of lnc PCAT29 elevated miR‐221 expression, inhibited TGF‐β1 in lung fibroblasts, and slowed the lung fibrosis process through the RASAL1/ERK1/2 signaling pathway.82 The gene discussed is MAPK3; the disease is pulmonary fibrosis.