微小RNA—221在非小细胞肺癌中的表达及意义
2018-12-22贺家勇杨晨晨徐茜
贺家勇 杨晨晨 徐茜
[摘要] 目的 探讨微小RNA-221(miRNA-221)在非小细胞肺癌(NSCLC)中的表达及意义。 方法 收集新疆医科大学附属肿瘤医院2010年1月~2011年1月接受肺叶切除+系统性淋巴结清扫的53例NSCLC患者的临床资料。采用实时定量逆转录聚合酶链反应(qRT-PCR)检测上述NSCLC组织及癌旁组织标本中miRNA-221的水平。分析miRNA-221表达水平与各临床病理参数的关系,采用Kaplan-Meier方法分析miRNA-221表达与NSCLC生存期(OS)之间的关系。 结果 miRNA-221在NSCLC组织中的相对表达量为(0.0234±0.0002),在癌旁组织中的相对表达量为(0.0095±0.0003),miRNA-221在NSCLC组织中的相对表达量高于癌旁组织(P < 0.05)。31例miRNA-211相对高表达。TNM分期中Ⅲ期患者miRNA-221的表达量高于Ⅰ~Ⅱ期患者(P < 0.05)。Kaplan-Meir生存分析结果显示,miRNA-221高表达患者中位OS为36.4个月,miRNA-221高表达与低表达患者OS差异无统计学意义(P > 0.05)。 结论 miRNA-221是潜在的肺癌预后预测分子标志物,miRNA-221可能参与了NSCLC的发生、发展。
[关键词] 微小RNA-221;非小细胞肺癌;表达
[中图分类号] R734 [文献标识码] A [文章编号] 1673-7210(2018)11(b)-0097-04
[Abstract] Objective To investigate the expression and significance of microRNA-221 in non-small cell lung cancer (NSCLC). Methods A total of 53 NSCLC cases′ clinical material were collected from Cancer Hospital Affiliated of Xinjiang Medical University from January 2010 to January 2011, and all the cases accepted pulmonary lobectomy and systematic mediastinal lymphadenectomy. Levels of miRNA-221 in the NSCLC and adjacent tissues were examined by real-time quantitative reverse transcription polymerase chain reaction (qRT-PCR). The relationship between expression level of miRNA-221 and clinic pathological parameters were analyzed. Kaplan-Meier was used to analyze the relationship between miRNA-221 expression and overall survival (OS). Results The relative expression of miRNA-221 in NSCLC tissues was (0.0234±0.0002), and it was (0.0095±0.0003) in adjacent tissues. The relative expression of miRNA-221 in NSCLC tissues was higher than that in adjacent tissues (P < 0.05). There were 31 cases having relative higher expression. The level of miRNA-221 was significantly higher in TNM stage Ⅲ than that in TNM stage Ⅰ-Ⅱ(P < 0.05). Kaplan-Meir survival analysis results manifested that the median OS of patients with miRNA-221 high expression was 36.4 months. There was no significant difference in OS between miRNA-221 low expression and high expression patients(P > 0.05). Conclusion miRNA-221 is a potential molecular marker for the prognosis of lung cancer, which may be involved in the development and progression of NSCLC.
[Key words] Micro RNA-221; Non-small cell lung cancer; Expression
非小細胞肺癌(non-small cell lung cancer,NSCLC)的发病占所有肺癌发病的85%,NSCLC患者的5年生存率仍不到15%[1-3],对NSCLC预后分子标志物的判断有助于NSCLC的早期诊断和提高患者的总生存时间[4]。微小RNA(microRNA,miRNA)是一类长度为24~25个核苷酸的内源性非编码小分子单链RNA[5],多项研究证明miRNA在癌症的发生、发展中起重要作用[6-8]。miRNA通过结合mRNA3′-UTR非翻译区(3′-UTR)导致mRNA的降解或翻译抑制而调控靶基因的表达。miRNA-221是其中重要的miRNA,研究表明,miRNA-221是一种致癌miRNA[9-10],miRNA与肺癌的关系文献目前鲜有报道。本研究回顾性分析53例NSCLC患者的临床资料,检测miRNA-221在肺癌组织中的表达情况,探讨miRNA-221与肺癌的关系。
1 资料与方法
1.1 一般资料
筛选新疆医科大学附属肿瘤医院2010年1月~2011年1月接受标准肺癌根治术(肺叶切除+系统性纵隔淋巴结清扫)的NSCLC鳞癌腺癌患者106例,并进行电话随访。纳入标准:完成随访病例;……
