UCA1/miR-122-5p/CPEB1轴促进肺腺癌的顺铂耐药发生机制研究

被引:0
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作者
吴玲玲
陈姝慧
胡天奇
周辰康
仇鲁男
王瑜敏
机构
[1] 温州医科大学附属第一医院医学检验中心
关键词
尿路上皮癌胚抗原1; miR-122-5p; 胞质多聚腺苷酸元件结合蛋白1; 肺腺癌; 顺铂耐药; 机制;
D O I
暂无
中图分类号
R734.2 [肺肿瘤];
学科分类号
摘要
目的 探讨尿路上皮癌胚抗原1(UCA1)/miR-122-5p/pcDNA-胞质多聚腺苷酸元件结合蛋白1(CPEB1)轴促进肺腺癌的顺铂耐药发生机制研究。方法 通过实时荧光反转录定量PCR(RT-qPCR)检测UCA1相关miRNA分子,并通过细胞转染获得miR-122-5p和CPEB1相关细胞株。通过双荧光素酶报告实验分别验证UCA1与miR-122-5p、CPEB1与miR-122-5p的结合。药物敏感性实验获得顺铂药物半抑制浓度(IC50);通过肿瘤基因组图谱(TCGA)数据库分析CPEB1在肺腺癌中的表达情况以及与免疫细胞功能的关系。结果 miR-122-5p在肺腺癌细胞中的表达水平明显升高,并通过双荧光素酶报告实验以验证UCA1与miR-122-5p结合,构建miR-122-5p抑制物和模拟物转染肺腺癌细胞株,发现miR-122-5p抑制后,顺铂IC50浓度下降,而miR-122-5p过表达后,顺铂IC50浓度升高。CPEB1在肺腺癌细胞中的表达水平明显降低,双荧光素酶报告实验证实CPEB1是与miR-122-5p结合,CPEB1过表达后,顺铂IC50浓度减低;对TCGA数据库分析显示肺腺癌组织CPEB1 mRNA明显低于癌旁组织,ROC曲线分析显示CPEB1表达水平能较好地用于诊断肺腺癌(AUC=0.849),进一步分析显示CPEB1表达水平与肺腺癌患者的细胞功能如T细胞、B细胞、CD8+T细胞、自然杀伤细胞、巨噬细胞、中性粒细胞、树突状细胞、肥大细胞存在密切关联。结论 UCA1与miR-122-5p存在结合位点,后者可影响肺腺癌的顺铂耐药,并与靶基因CPEB1结合;肺腺癌中CPEB1呈低表达,降低肺腺癌顺铂药物的敏感性。UCA1/miR-122-5p/CPEB1轴有望为干预肺腺癌顺铂耐药的靶点。
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页码:789 / 796
页数:8
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