Abstract：Objective To study the effect of oridonin (ORI) on proliferation and apoptosis of human osteosarcoma MG63 cells and the possible mechanism. Methods The experimental groups were treated with different concentrations of ORI (10, 20, 30, 40 and 50 μmol/L), and the control group was treated with the same amount of DMSO. Crystal violet staining was used to investigate the proliferation of MG63 cells. Western blot was used to detect the proteins of proliferation, apoptosis, and β-catenin. Flow cytometry was used to assess apoptosis of MG63 cells. T-cell factor/lymphoid enhancing factor(TCF4/ LEF) luciferase reporter plasmid was used to detect the effect on Wnt signal transduction. SqRT-PCR was used to analyze the expression of β-catenin in MG63 cells. Results There was no significant difference in crystal violet staining and quantitization between 10 μmol/L ORI and control group (P＞0.05), but 20 to 50 μmol/L ORI group was lower than control group, and the difference was statistically significant (P＜0.05). 10 μmol/L ORI group was higher than 20-50 μmol/L ORI group, 20 μmol/L ORI was higher than 30-50 μmol/L ORI, 30 μmol/L ORI was higher than 40 and 50 μmol/L ORI, 40 μmol/L ORI was higher than 50 μmol/L ORI, and the differences were statistically significant (P＜0.05). The expression level of PCNA in experimental group was lower than that in control group, and the difference was statistically significant (P＜0.05). Expression levels of caspase-3, Cleaved caspase-3, and Bad were higher in the experimental group than in the control group, with statistical significance (P＜0.05). The expression level of Bcl-2 in all experimental groups was higher than that in control group, 20 and 30 μmol/L were lower than 10 μmol/L, 30 μmol/L was lower than 20 μmol/L, the differences were statistically significant (P＜0.05). The expression of β-catenin in experimental group was lower than that in control group, 20 and 30 μmol/LORI was lower than 10 μmol/LORI, 30 μmol/LORI was lower than 20 μmol/L LORI, the differences were statistically significant (P＜0.05). Compared with the control group, the apoptotic cells increased significantly in the experimental group, and decreased at 30 μmol/L, but the cell necrosis increased significantly. The transcriptional activity of TCF4/LEF reporter plasmids in all experimental groups was lower than that in control group, 20 and 30 μmol/L ORI were lower than 10 μmol/L ORI, 30 μmol/L ORI was lower than 20 μmol/L ORI, the differences were statistically significant (P＜0.05). The expression of β-catenin in experimental group was lower than that in control group, 20 and 30 μmol/L ORI was lower than 10 μmol/L ORI, 30 μmol/L ORI was lower than 20 μmol/L ORI, the difference was statistically significant (P＜0.05). Conclusion ORI inhibited proliferation and induced apoptosis in MG63 cells, which might be partly related to the inhibition of Wnt signal in this cancer cell line.
邹翔 赵正明 胡华平 黄斌 陈光华 丁洪. 冬凌草甲素对骨肉瘤细胞MG63增殖和凋亡的影响及其可能机制[J]. 中国医药导报, 2022, 19(34): 17-22.
ZOU Xiang ZHAO Zhengming HU Huaping HUANG Bin CHEN Guanghua DING Hong. Effect on proliferation and apoptosis of Oridonin on MG63 osteosarcoma cells and its possible mechanism. 中国医药导报, 2022, 19(34): 17-22.
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