YM155对乳腺癌细胞 MDA-MB-231凋亡影响的机制探讨  

Effects of YM155 on proliferation and apoptosis of triple negative breast cancer MDA-MB-231 cells

作　　者：樊晓东[1] 丁亦含 邓之奎[1] 甄林林[1] 

机构地区：[1]南京医科大学附属淮安第一医院普外科,江苏223001

出　　处：《中华内分泌外科杂志》2015年第2期120-124,共5页Chinese Journal of Endocrine Surgery

基　　金：江苏省自然科学基金项目（BK2010287）;南京市科技支撑计划（HAS2013021）

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的凋亡效应及其可能的作用机制。方法采用CCK-8法实验检测不同浓度YM155对MDA-MB-231细胞增殖的影响，计算其24及48 h半数抑制浓度（ the half maximal inhibitory concentration ，IC50）；流式细胞术检测细胞凋亡情况；RT-PCR法检测加药与对照组细胞的survivin 和bcl-2的mRNA的表达量；蛋白质印迹法检测sur-vivin、bcl-2、caspase-3、PARP蛋白表达变化情况。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，24及48 h的IC50分别为（1.749±0.265）及（0.823±0.125） ng／ml。流式细胞仪检测显示YM155在0.5、1.0及1.5 ng／ml浓度对细胞的凋亡率分别是（10.93±0.94）％、（31.10±1.51）％及（46.83±2.92）％，与对照组（6.4±1.2）％相比差异具有统计学意义（P＜0.01）。 YM155可显著下调survivin的mRNA和蛋白表达，同时降低bcl-2和提高caspase-3、PARP的蛋白表达。结论 YM155能有效诱导乳腺癌细胞MDA-MB-231凋亡，其诱导凋亡机制是通过下调survivin蛋白，激活caspase凋亡通路，切割DNA而引发凋亡；bcl-2家族基因可能参与此过程。Objective To investigate the apoptosis induction effects and the possible mechanism of YM155 on triple negative breast cancer MDA-MB-231cells.Methods MDA-MB-231 cells were treated with dif-ferent concentrations of YM 155, and the survival rate of the cells was determined by CCK-8 assay and the half maximal inhibitory concentration （ IC50 ） value of YM155 was calculated .The apoptosis rate was examined by An-nexin V-FITC/PI double staining.mRNA expression of survivin and bcl-2 in MDA-MB-231cells was detected by RT-PCR.The protein expression of survivin , bcl-2, caspase-3, and PARP were detected by Western blot .Re-sults YM155 significantly inhibited the growth of MDA-MB-231 cells in a dose-and-time-dependenct way .IC50 was（1.749 ±0.265） ng/ml and（0.823 ±0.125） ng/ml respectively at 24 and 48 hours.The apoptosis rate of cells treated with 0.5 ng/ml, 1.0 ng/ml, and 1.5 ng/ml YM155 was （10.93 ±0.94）%,（31.10 ±1.51）%, and（46.83 ±2.92）%respectively, which had significant difference compared to that of the control group （6.4 ± 1.2）%（P〈0.01）.YM155 could significantly decrease mRNA and protein expression of surviving , besides, it reduced bcl-2 expression and increased caspase-3 and PARP protein expression .Conclusions YM155 can ef-fectively induce the apoptosis of MDA-MB-231 cells by downregulating survivin and activating caspase pathway . Bcl-2 might play a role in the apoptosis .

关 键 词：YM155 三阴性乳腺癌 生存素 细胞凋亡 

分 类 号：R737.9[医药卫生—肿瘤]