Additionally, TGIF2 is associated with the epithelial-mesenchymal transition (EMT) phenotype in various diseases, including lung adenocarcinoma (12), primary biliary cholangitis (13), chronic obstructive pulmonary disease (14), colon cancer (15), prostate cancer (16), hepatocellular carcinoma (17) etc. Notably, as a downstream target of multiple non-coding RNAs, TGIF2 regulates the progression of glioma (18–21). This evidence concerns the gene TGIF2 and chronic obstructive pulmonary disease.