文章摘要
樊晓东,甄林林,刘敏敏,厉 芝,宋 玮,丁亦含,施建华.YM155诱导乳腺癌细胞MDA-MB-231自噬并促进其凋亡[J].南京医科大学学报,2015,(12):1697~1702
YM155诱导乳腺癌细胞MDA-MB-231自噬并促进其凋亡
YM155 enhances apoptosis in triple negative breast cancer MDA-MB-231 cells via autophagy
投稿时间:2015-03-27  
DOI:10.7655/NYDXBNS20151205
中文关键词: YM155  三阴性乳腺癌  生存素  凋亡  自噬
英文关键词: YM155  TNBC  survivin  apoptosis  autophagy
基金项目:江苏省科技厅?江苏省人才办资助项目(BRA2014129);淮安市科技局资助项目(HAS2013021)
作者单位
樊晓东 南京医科大学附属淮安第一医院甲乳外科,江苏 淮安 223300 
甄林林 南京医科大学附属淮安第一医院甲乳外科,江苏 淮安 223300 
刘敏敏 南京医科大学附属淮安第一医院甲乳外科,江苏 淮安 223300 
厉 芝 南京医科大学附属淮安第一医院甲乳外科,江苏 淮安 223300 
宋 玮 南京医科大学附属淮安第一医院甲乳外科,江苏 淮安 223300 
丁亦含 南京医科大学附属淮安第一医院甲乳外科,江苏 淮安 223300 
施建华 南京医科大学附属淮安第一医院甲乳外科,江苏 淮安 223300 
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中文摘要:
      目的:研究生存素(survivin)抑制剂YM155对三阴性乳腺细胞株MDA-MB-231的凋亡及自噬的影响及其可能的作用机制。方法:采用CCK-8法检测不同浓度YM155对MDA-MB-231细胞增殖的影响,同时联合加入自噬抑制剂3-甲基腺嘌呤(3-methyladenine,3-MA)处理细胞与单用组比较细胞增殖变化;流式细胞术检测细胞凋亡情况;Real-time PCR法检测不同加药组与对照组细胞的survivin?beclin 1和bcl-2的mRNA表达量;蛋白质印迹法检测survivin?bcl-2?caspase-3?PARP及自噬相关蛋白beclin 1和LC-3表达变化情况。结果:YM155对MDA-MB-231具有明显的生长抑制效应且呈剂量和时间依赖性。流式细胞结果显示YM155在0.5?1.0?1.5 ng/mL浓度对细胞的凋亡率分别是(11.9 ± 2.4)%?(21.7 ± 2.6)%?(30.8 ± 4.5)%,与对照组(6.4 ± 1.2)%相比具有统计学意义(P < 0.01)。当使用自噬抑制剂3-MA(5 mmol/L)联合处理细胞24 h后细胞增殖率(62.5 ± 3.3)%,与单用YM155组(54.7 ± 2.7)%相比,细胞增殖活性增强(P < 0.05)。YM155可显著下调survivn的mRNA和蛋白表达,降低bcl-2和提高caspase-3?PARP的蛋白表达,同时上调beclin 1表达及增加LC-3Ⅱ/ LC-3Ⅰ的比值,促进细胞自噬的发生。结论:YM155能够有效诱导乳腺癌细胞MDA-MB-231凋亡及自噬的发生,其诱导的自噬效应进一步促进其凋亡的发生。
英文摘要:
      Objective:To investigate the effect of YM155,a survivin inhibitor,on the apoptosis and autophagy of the triple negative breast cancer MDA-MB-231 cells. Methods:MDA-MB-231 cells was treated with different concentrations of YM155,the survival rate of the cells was determined by CCK-8 assay and the IC50 (half inhibitory concentration)value of YM155 was calculated. The apoptosis rate was examined by Annexin V-FITC/PI double staining. The mRNA expression of survivin,beclin 1 and bcl-2 in MDA-MB-231 cells was detected by Real-time PCR. The protein expression of survivin,bcl-2,caspase 3,PARP,beclin 1 and LC-3 were detected by Western blot. Results:It was revealed that YM155 significantly inhibited the growth of MDA-MB-231 cells in a dose-and time-dependent model. The apoptosis rates of cells treated with 0.5,1.0,1.5 ng/mL YM155 were (11.9 ± 2.4)%,(21.7 ± 2.6)%,and (30.8 ± 4.5)%,respectively,which all had significant difference compared to control cells[(6.4 ± 1.2)%]. When a combination of 3-MA effect after 24 h,cell proliferation rate was significantly enhanced compared to that of the single YM155 group (P < 0.05).With the increasing of YM155 concentration,the expression levels of mRNA and protein of survivin and BCL-2 were decreased,while the expression levels of caspase-3,PARP,beclin1 and LC-3 were increased. Compared with the YM155 group,the protein levels of LC-3 and caspase-3 were lower in YM155 + 3-MA group. Conclusion:YM155 could effectively inhibit MDA-MB-231 cells proliferation by inducing apoptosis and autophagy,while autophagy induction effect can enhance its apoptosis effect.
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