富半胱氨酸61通过FoxO1通路介导SCD1的表达调控结肠癌对5-氟尿嘧啶化疗敏感性的研究

被引:2
作者
王永辉 [1 ]
杨扬 [2 ]
李海 [3 ]
夏添松 [4 ]
李涛 [3 ]
机构
[1] 河南省驻马店市中心医院药学部
[2] 河南省人民医院 河南省神经疾病影像诊断与研究重点实验室, 郑州
[3] 江苏省人民医院 南京医科大学第一附属医院病理学部
[4] 江苏省人民医院 南京医科大学第一附属医院普外科
关键词
结肠肿瘤; 氟尿嘧啶; 基因表达调控; 抗药性, 肿瘤;
D O I
暂无
中图分类号
R735.35 [];
学科分类号
摘要
目的探讨富半胱氨酸61(CCN1)降低结肠癌细胞对5-氟尿嘧啶(5-FU)化疗敏感性的作用及其分子机制。方法收集结肠癌及癌旁组织, 体外培养结肠癌细胞和正常结肠上皮细胞、HCT-116细胞和5-FU耐药细胞, RT-qPCR检测SCD1和CCN1 mRNA的表达水平;培养HCT-116细胞, 分别转染pcDNA3.1和CCN1表达载体, 或感染shCtrl和shCCN1慢病毒, 加入5-FU后用CCK-8方法检测细胞活力, Western blot和RT-qPCR检测SCD1蛋白和mRNA表达水平, 油红O染色方法检测细胞脂质含量;Western blot检测转录因子FoxO1在细胞核和细胞质中的分布情况, 荧光素酶报告基因检测CCN1和FoxO1对SCD1启动子转录活性的影响。结果与对照组相比, 结肠癌组织、细胞系及HCT-116/5-FU细胞中SCD1的表达水平均上调(均P<0.05);过表达CCN1能够降低细胞对5-FU的敏感性, 增加细胞内脂质沉积, 上调SCD1的表达水平(P<0.05);敲降CCN1则显著增加细胞对5-FU的敏感性, 降低细胞内脂质含量, 下调SCD1的表达水平(P<0.05);CCN1能够促进FoxO1出核, 激活或抑制FoxO1活性能够促进或下调SCD1的表达水平和启动子活性(P<0.05)。结论 CCN1可能通过激活FoxO1活性上调SCD1的表达从而抑制结肠癌细胞对5-FU的敏感性。
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