Meanwhile, it has been reported that TGFBR2 is one of the downstream target genes of miR-9-5p (19), and the KEGG analysis of this study also showed that TGFBR2 was involved in several signal pathways related to the malignant properties of lung cancer, such as cellular senescence, endocytosis, and MAPK pathways, which had been reported previously (39, 40). The gene discussed is TGFBR2; the disease is lung cancer.