In the previous study, we described the differentially expressed miRNAs, lncRNAs, and mRNAs in IPF; however, the molecular mechanisms of these RNAs are poorly elucidated.10, 11 In the present work, we defined a novel lnc-PCF, its function, and the crosstalk between lnc-PCF and the map3k11 target miR-344a-5p in the regulation of fibrogenesis. The gene discussed is MAP3K11; the disease is idiopathic pulmonary fibrosis.