Effect of miR-129 on proliferation and apoptosis of osteosarcoma MG-63 cells by targeting SEPHS1 / 实用肿瘤学杂志

ABSTRACT

Objective The aim of this study was to investigate the effect of miR-129 on the proliferative activity and apop-tosis of osteosarcoma MG-63 cells. Methods Thirty cases of osteosarcoma and its adjacent paracancerous tissues were collected. RT-PCR was used to detect the expressions of miR-129 mRNA and SEPHS1 mRNA. Western blot was used to detect the protein level of SEPHS1. After MiR-129 was over-expressed and knocked down,the cell proliferation was detected in MG-63 cells by CCK-8,and apoptosis was detected in MG-63 cells by Westerm blot and hoechest staining. Results In this study,the expression of miR-129 in osteosarcoma tissues was significantly higher than that in para-cancerous tissues(P<0. 05). Through the established model in vitro of miR-129 overexpression or knockdown,it was determined that the miR-129 mimetic and inhibitor concentrations were optimal for overexpression and knockdown at 50 nM and 200 nM, respectively. The possibility of binding between miR -129 and SEPHS1 was predicted by software,and the luciferase reporter assay further confirmed the binding relationship between miR-129 and SEPHS1. Knockdown of miR-129 significantly inhibited the proliferation of MG-63 cells and accelerated the apoptosis of MG-63 cells. Conclusion miR -129 plays a key role in regulating the proliferation and apoptosis of osteosarcoma cells by binding to SEPHS1.