SOX2-OT and osteosarcoma: EGCG targeting lncRNA SOX2OT V7 inhibits pro-survival autophagy induced by chemotherapeutic drugs (such as DOX), thereby enhancing the chemosensitivity of osteosarcoma cells; At the same time, EGCG targeting SOX2OT V7 decreases stemness of osteosarcoma stem cells (including drug resistance, tumorigenic ability, self-renewal ability, etc.).