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抑癌基因PTEN提高耐药食管癌化疗敏感性的作用及其机制研究 被引量:4

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摘要 目的研究抑癌基因10号染色体缺失的磷酸酶和张力蛋白同源基因(PTEN)对耐顺铂食管癌细胞Ec9706/c DDP化疗敏感性的影响及其机制。方法建立耐药的食管癌细胞株Ec9706/c DDP,脂质体转染PTEN质粒及其功能缺陷的突变质粒PEGFP-C1-G129E和PEGFP-C1-C124S,Wst-1检测食管癌细胞Ec9706/c DDP在含顺铂培养基中的增殖情况,克隆形成实验检测其增殖能力,流式细胞术检测其凋亡,荧光定量聚合酶链反应(Q-PCR)检测多重耐药基因1(MDR1)mRNA的表达水平。结果与完全空白组、转染空质粒组、PEGFP-C1-G129E组和PEGFP-C1-C124S组相比,转染PTEN的Ec9706/c DDP细胞增殖明显减少(P<0.01);转染PTEN组Ec9706/c DDP克隆形成率减少;转染PTEN使得Ec9706/c DDP凋亡增加(P均<0.01);Q-PCR结果显示,PTEN明显抑制MDR1 mRNA水平的表达(P均<0.01),并且这种抑制作用依赖于129和124这两个位点。结论 PTEN可促进耐药食管癌细胞的化疗敏感性,并通过抑制MDR1基因的表达水平促进肿瘤细胞对顺铂的敏感性。
出处 《中国临床研究》 CAS 2016年第2期214-217,共4页 Chinese Journal of Clinical Research
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