ABSTRACT
Objective To investigate the effect of Sema6D knockdown on the proliferation, migration, invasion and angiogenesis-promoting ability of human osteosarcoma cell lines. Methods The expression of Sema6D in clinical tissues and cell lines of human osteosarcoma was detected. After the targeted siRNA transfection, the changes of proliferation, migration and invasion were measured by CCK-8, wound healing and Transwell experiments. HUVECs were co-cultured with tumor conditioned medium to detect their tube formation ability. And the expression of signal pathway proteins was detected by Western blot. Results Sema6D was highly expressed in human osteosarcoma tissues and cell lines(P < 0.05). After silencing Sema6D, the proliferation, migration and invasion of 143B and MG63 cells decreased significantly(P < 0.05), the angiogenesis ability of HUVECs decreased in vitro(P < 0.01), and the expression of PI3K/AKT/mTOR and ERK-related signal pathway proteins decreased(P < 0.05). Conclusion Sema6D is overexpressed in human osteosarcoma tissues and cell lines. Knockdown of Sema6D expression level could inhibit the proliferation, migration, invasion and angiogenesis-promoting ability of human osteosarcoma cells via reducing PI3K/AKT/mTOR and ERK signal pathway.