沉默RIPK4基因表達(dá)增強(qiáng)TNF-α誘導(dǎo)骨肉瘤MG-63細(xì)胞凋亡的敏感性
[Abstract]:Aim: to investigate the effect of silencing receptor interacting protein kinase 4 (receptor interacting protein kinase4,RIPK 4) gene expression on the apoptosis of osteosarcoma MG-63 cells induced by tumor necrosis factor 偽 (tumor necrosis factor- 偽 (TNF- 偽). Methods: siRNA specific for RIPK 4 gene was transfected into MG-63 cells of osteosarcoma (RIPK4-siRNA transfection group) by liposome transfection, and negative control group (siRNA (negative control-siRNA,NC-siRNA) was used as negative control group. At the same time, the MG-63 cells were treated with human recombinant TNF- 偽 only as the positive control group, and the RIPK4-siRNA transfected MG-63 cells were treated with TNF- 偽. 5-ethynyl-2oxy-deoxyuridine, 5-ethynyl-2- deoxyuridine, were treated with 5-ethynyl-2- deoxyuridine, and then treated with TNF- 偽. EdU) method was used to detect the proliferation of MG-63 cells. The apoptosis of MG-63 cells was detected by Hoechst 33258 staining and the expression of RIPK4 protein and apoptosis-related proteins Bax,Bcl-xL and caspase-3 in MG-63 cells of osteosarcoma were detected by Western blot. Results: after RIPK4-siRNA was transfected into MG-63 cells, the expression of RIPK4 protein was significantly down-regulated (P0.05). RIPK4-siRNA transfection group, NC-siRNA transfection group, the expression level of RIPK4 protein decreased significantly (P0.05). The positive expression rates of EdU in TNF- 偽 positive control group and RIPK4-siRNA transfected TNF- 偽 group were 60.763% and 16.7%, respectively. The proliferation ability of RIPK4-siRNA transfected group was significantly lower than that of NC-siRNA transfection group (P0.05). The proliferation ability of TNF- 偽 cells transfected with RIPK4-siRNA was significantly lower than that of RIPK4-siRNA transfection group and TNF- 偽 positive control group (P < 0. 05). The number of apoptotic cells in RIPK4-siRNA transfection group was higher than that in NC-siRNA transfection group (P0.05). The number of apoptotic cells in TNF- 偽 group in RIPK4-siRNA transfection group was significantly higher than that in RIPK4-siRNA transfection group and TNF- 偽 positive control group (P < 0. 05). Compared with the NC-siRNA transfection group, the expression of Bax and caspase-3 protein in the RIPK4-siRNA transfection group was significantly up-regulated, while the expression level of Bcl-xL protein was down-regulated (P < 0. 05). The expression levels of Bax and caspase-3 protein in TNF- 偽 group of RIPK4-siRNA transfection group were significantly higher than those in RIPK4-siRNA transfection group and TNF- 偽 positive control group, while the expression of Bcl-xL protein was further down-regulated. The difference was statistically significant (P 0.05). Conclusion: silencing the expression of RIPK 4 gene can induce apoptosis in MG-63 cells of osteosarcoma and enhance the sensitivity of apoptosis induced by TNF- 偽.
【作者單位】: 蘭州大學(xué)第二醫(yī)院骨科;武威市人民醫(yī)院骨科;蘭州大學(xué)第二醫(yī)院風(fēng)濕免疫科;甘肅省腫瘤醫(yī)院骨與軟組織腫瘤科;
【基金】:甘肅省基礎(chǔ)研究創(chuàng)新群體項(xiàng)目(編號(hào):1308RJIA004)~~
【分類(lèi)號(hào)】:R738.1
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