Wnt信号通路介导CIP2A沉默诱导肺癌细胞凋亡
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摘要
目的探讨Wnt信号通路在沉默蛋白磷酸酶2A的癌性抑制因子(CIP2A)对肺癌细胞凋亡影响中的作用。方法以H1299细胞为探讨对象,用CIP2A shRNA慢病毒感染后,Realtime PCR和Western印迹检测沉默效果。以Western印迹检测沉默CIP2A后的肺癌细胞中β-catenin、c-myc蛋白表达水平。用Wnt信号通路激活剂处理沉默CIP2A后的肺癌细胞,噻唑蓝(MTT)法测定细胞增殖,流式细胞术检测细胞凋亡,Western印迹检测细胞中活化的含半胱氨酸的天冬氨酸蛋白水解酶(Cleaved Caspase)-3、Cleaved Caspase-9、β-catenin、c-myc蛋白水平。结论 CIP2A shRNA慢病毒感染显著降低肺癌细胞中CIP2A表达水平。沉默CIP2A后的肺癌细胞增殖活性显著降低,细胞凋亡率显著升高,细胞中Cleaved Caspase-3、Cleaved Caspase-9蛋白水平显著升高,β-catenin、c-myc蛋白水平显著降低(P<0.05)。Wnt信号通路激活剂可以逆转沉默CIP2A对肺癌细胞增殖抑制、凋亡促进作用,降低细胞中Cleaved Caspase-3、Cleaved Caspase-9蛋白水平,升高细胞中β-catenin、c-myc蛋白水平。结论 Wnt信号通路参与介导沉默CIP2A对肺癌细胞凋亡诱导作用。
        
引文
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