COL1A2 and Hepatic fibrosis: Analysis of transcriptomic data retrieved from the Gene Expression Omnibus (GEO) database showed that Col1α2 was significantly upregulated in the liver tissues of C57BL/6J mice at the liver fibrosis stage (6 wpi and 7 wpi), suggesting that Col1α2 is a target gene of sja-let-7 and plays a pivotal role in liver fibrosis (S6 Fig).