lncRNA, which regulates miR-21-5p/PDCD4 axis, miR-193a-3p/RSF1 axis, miR-195-5p/YAP axis, miR-137, miR-320b/RAP2B axis, and miR-375-3p/KT/mTOR axis, contributes to osteosarcoma cell growth, metastasis, and invasion by activating MAPK signaling pathway, NF-kB signaling pathway, and PI3K-AKT-mTOR signaling pathway. The gene discussed is MTOR; the disease is osteosarcoma.