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SiRNA沉默β-catenin对MGC803细胞bax基因表达的影响

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摘要 目的研究小干扰RNA沉默β-catenin对胃癌MGC803细胞bax基因表达的影响。为以β-catenin为靶点的肿瘤预防和治疗提供理论依据。方法设计β-catenin短链发夹式RNA(short hairpin RNA,shRNA)干扰质粒,通过脂质体转染MGC-803细胞。将细胞分为3组:空白对照组(未转染)、阴性对照组(空质粒转染)、质粒干扰组。用RT-PCR技术检测β-catenin表达情况。免疫组化SP染色方法测BAX含量。结果 RT-PCR技术检测β-catenin转录情况:β-catenin空白对照组OD值(1.6833±0.021),阴性对照组OD值(1.292±0.087),质粒干扰组OD值(0.7399±0.042)。经单因素方差分析,组间比较差异有统计学意义(P<0.01);经过多重比较SNK检验结果显示,质粒干扰组与阴性对照组和空白对照组差异有统计学意义(P<0.01)。阴性对照组和空白对照组没有统计学意义(P>0.05)。免疫组化BAX染色结果显示:空白对照组细胞质染色呈淡黄色,质粒干扰组与阴性对照组相比,细胞质着色则明显增强,黄染加重。结论通过RNAi技术沉默β-catenin基因表达,使MGC-803细胞的β-catenin表达下调,质粒干扰组的促凋亡基因bax表达更强。
出处 《内蒙古医学杂志》 2016年第4期388-391,F0003,共5页 Inner Mongolia Medical Journal
基金 内蒙古卫生和计划生育委员会项目(2010218) 教育厅自然科学重点项目(NJZZ12149) 内蒙古医科大学青年创新基金(YKD2013QNCX006)资助
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