siRNA干扰NF-E2相关因子2对喉鳞状细胞癌化疗敏感性的影响

Inhibition of Nrf2 by siRNA Regulates Chemosensitivity of Laryngeal Cancer to Cisplatin

徐吉;周争;李吉平;

1:上海交通大学医学院附属仁济医院耳鼻咽喉科

摘要
目的探讨小片段干扰RNA(siRNA)干扰NF-E2相关因子2(NF-E2-related factor 2,Nrf2)对人喉癌Hep2细胞化疗敏感性的影响及凋亡的差异。方法体外培养人喉癌细胞系Hep2,设立实验组和对照组,实验组(Hep2/siRNA组)采用脂质体转染法,转染siRNA至Hep2细胞系,对照组(Hep2/siRNA-control组)转染空质粒siRNA-control。经Western Blot验证其转染效果后,采用CCK-8法检测计算Hep2/siRNA与Hep2/siRNA-control经不同浓度梯度顺铂(分别为1、2、4、8、16μg/ml)处理后的细胞增殖抑制率及IC50值。通过凋亡试剂盒分别染色Hep2/siRNA与Hep2/siRNA-control细胞系,采用流式细胞仪检测两组细胞的凋亡率。结果实验组的Nrf2蛋白表达比对照组发生下调,经不同浓度梯度顺铂处理24h后,Hep2/siRNA细胞系增殖抑制率相对Hep2/siRNA-control逐渐升高,顺铂浓度为4μg/ml时,对照组细胞增殖率为35.55%±6.14%,而实验组细胞增殖率为46.07%±5.21%,IC50值下调,细胞凋亡率由17.1%(对照组)升高至26.6%(实验组)。结论 siRNA干扰Nrf2基因可增强Hep2细胞系对顺铂的敏感性。
关键词
喉癌;NF-E2相关因子2;小片段干扰RNA;化疗敏感性;顺铂
基金项目(Foundation):
上海市科学技术委员会上海自然基金项目(13ZR1425300)
作者
徐吉;周争;李吉平;
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徐吉周争李吉平