Effect of knockdown of long-chain noncoding RNA KCNQ1 overlapping transcript 1 on growth and cisplatin sensitivity of HGC-27 cells
- Author:
- No author available
- Journal Title:
- World Chinese Journal of Digestology
- Issue:
- 6
- DOI:
- 10.11569/wcjd.v28.i6.210
- Key Word:
- 胃癌;长链非编码RNA;KCNQ1重叠转录物1;细胞增殖;顺铂;细胞凋亡
Abstract： 背景 胃癌(gastric cancer,GC)已成为威胁人类生命安全的恶性肿瘤之一,目前GC发生及发展的分子机制尚未完全阐明,长链非编码RNA(long-chain noncoding RNA,lncRNA)在肿瘤中异常表达并可能参与肿瘤发生及发展过程,但仍有部分lncRNA在GC发生及转移过程中的调控作用尚未阐明.目的 探讨lncRNA KCNQ1重叠转录物1(KCNQ1 opposite strand/antisense transcript 1,KCNQ1OT1)对HGC-27细胞增殖、侵袭、迁移和顺铂敏感性的影响.方法 将转染KCNQ1OT1-siRNA的HGC-27细胞作为KCNQ1OT1-siRNA组,转染阴性对照的HGC-27细胞作为NC-siRNA组,正常培养的细胞作为对照组.顺铂处理KCNQ1OT1-siRNA组、NC-siRNA组细胞后,采用细胞计数试剂盒法检测细胞活力并计算细胞的半数抑制浓度(half-maximal inhibitory concentration,IC50)值.采用实时荧光定量聚合酶链式反应、Transwell小室、流式细胞仪和免疫印迹法分别检测KCNQ1OT1表达水平、细胞增殖活力、侵袭与迁移、周期分布和细胞中上皮型钙黏蛋白(E-cadherin)、神经型钙黏蛋白(N-cadherin)、波形蛋白(Vimentin)、P-糖蛋白(P-glycoprotein,P-gp)、多药耐药关联蛋白1(multidrug resistance associated protein 1,MRP1)表达情况.结果 与对照组比较,NC-siRNA组中各指标差异无统计学意义(P＞0.05);与对照组或NC-siRNA组比较,KCNQ1OT1-siRNA组细胞中KCNQ1OT1表达水平、细胞在S期与G2/M期所占百分比和细胞增殖、侵袭、迁移能力以及细胞中N-cadherin、Vimentin蛋白表达水平均明显降低,而细胞在G0/G1期所占百分比和E-cadherin蛋白表达水平明显升高(P＜0.05);与NC-siRNA组比较,KCNQ1OT1-siRNA组P-gp蛋白水平显著降低(P＜0.05),MRP1蛋白水平显著升高(P＜0.05),IC50值明显降低(P＜0.05).结论 下调KCNQ1OT1表达可抑制HGC-27细胞增殖、侵袭、迁移并增强细胞对顺铂的敏感性.
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