安宫牛黄丸通过诱导细胞凋亡和降低线粒体膜电位抑制肿瘤细胞增殖

目的 观察安宫牛黄丸的抗肿瘤作用,并探索其可能的作用机制。方法 安宫牛黄丸9,30,90,300和900 mg·L^-1分别与人胃癌MGC-803和人肝癌BEL-7402细胞孵育24,48和72 h。采用噻唑蓝(3-(4,5-二甲基噻唑-2-基)-5(3-羧基甲基苯基)-2-(4-磺酸苯基)-2H-四氮唑)细胞毒实验MTS法和克隆实验观察安宫牛黄丸对MGC-803和BEL-7402细胞增殖的影响;应用Hoechst 33258/PI染色和流式细胞仪检测细胞凋亡;荧光分光光度计检测线粒体膜电位。结果 安宫牛黄丸具有浓度依赖性地抑制肿瘤细胞增殖的作用。MTS法测定结果表明,安宫牛黄丸作用48和72 h对MGC-803细胞增殖具有抑制作用,浓度-效应相关系数分别为0.996(P=0.002)和0.756(P=0.024);与BEL-7402细胞作用48和72 h的浓度-效应相关系数分别为0.732(P=0.030)和0.702(P=0.037)。细胞克隆实验结果表明,安宫牛黄丸作用24 h可浓度依赖性地抑制MGC-803细胞(r=0.914,P=0.011)和BEL-7402细胞(r=0.871,P=0.024)克隆形成。Hoechst 33258/PI染色和流式细胞仪检测结果表明,安宫牛黄丸900 mg·L^-1作用24 h可诱导MGC-803和BEL-7402细胞凋亡,细胞凋亡百分率分别达27.2%和19.7%。安宫牛黄丸900 mg·L^-1作用后连续检测3 min,MGC-803和BEL-7402细胞的线粒体膜电位比对照组分别下降15.9%和15.0%。结论 安宫牛黄丸具有抑制肿瘤细胞增殖的作用,其作用机制与诱导细胞凋亡和降低肿瘤细胞线粒体膜电位有关。

Anti-proliferation of Angong Niuhuang pill on tumor cells via inducement of apoptosis and down-regulation of mitochondrial membrane potential

OBJECTIVE To validate the anticancer effect of Angong Niuhuang pill(AGNH) and pinpoint associated molecular mechanisms using human cancer cells.METHODS Human MGC-803 gastric carcinoma and human BEL-7402 hepatocarcinoma cells were incubated with AGNH 9,30,90,300 and 900 mg·L-1 for 24,48 and 72 h,respectively.Cell viability was detected with 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium(MTS) assay and colony formation assay.Apoptosis was measured with flow cytometry and Hoechst 33258/PI staining.Change in mitochondrial membrane potential(Δψ) was detected by spectrofluorophotometer.RESULTS AGNH inhibited MGC-803 cell proliferation(for 48 h,r=0.996,P=0.002;for 72 h,r=0.756,P=0.024) and BEL-7402 cells(for 48 h,r=0.732,P=0.030;for 72 h,r=0.702,P=0.037) in a concentration-dependent manner,as showed by MTS assay.AGNH inhibited colony formation on MGC-803 cells(r=0.914,P=0.011) and BEL-7402 cells(r=0.871,P=0.024) in a concentration-dependent manner for 24 h.Hoechst 33258/PI staining and flow cytometry assay showed that AGNH 900 mg·L-1 for 24 h induced apoptosis of MGC-803 and BEL-7402 cells,and the apoptosis rate was 27.2% and 19.7%,respectively.Compared with normal control group,AGNH 900 mg·L-1 for 3 min decreased the mitochondrial membrane potential of MGC-803 and BEL-7402 cells to 15.9% and 15.0% of control group.CONCLUSION AGNH inhibits proliferation of human cancer cells.Apoptosis and depolarization of mitochondrial transmembrane potential are probablly its mechanism.