hsa-miR-126和hsa-miR-518b在食管鳞癌中的表达

目的探讨食管鳞癌及正常组织微小RNA(miRNA)分子表达谱的差异,寻找并验证具有差异表达的miRNA。方法随机选3例首次诊治食管鳞癌患者的手术切除标本,取癌组织及正常粘膜。采用荧光探针杂交芯片扫描技术,获得食管鳞癌miRNA表达谱,并对表达谱的可靠性进行荧光实时定量RT-PCR验证。另取15例首次诊治食管鳞癌患者手术切除标本的癌组织及正常粘膜,对其中具有表达差异的hsa-miR-126和hsa-miR-518b进行进一步验证。结果得到了食管鳞癌及正常组织的MicroRNA表达谱,分析得到表达变化且具有统计学意义(单侧t检验,P<0.05)的miRNA11个,其中上调1个,下调10个。在另外15对验证样本中,hsa-miR-126上调10例(配对t检验,P<0.05),hsa-miR-518b下调12例(配对t检验,P<0.05)。结论 hsa-miR-126和hsa-miR-518b在食管鳞癌组织和正常组织中存在差异表达,hsa-miR-126在食管癌组织中上调,hsa-miR-518b下调。

Differential expression of hsa-miR-126 and hsa-miR-518b in esophageal squamous carcinoma

Objective To identify the differentially expressed microRNAs(miRNAs) between esophageal squamous carcinoma(ESC) and adjacent non-tumorous tissue(NT).Methods The expression levels of the miRNAs were detected in 3 fresh ESC and NT samples by hybridization with miRNAs microarray chip.Real-time quantitative RT-PCR was performed to confirm the results of the microarray analysis.The expressions of hsa-miR-126 and hsa-miR-518b in ESC were validated by real-time quantitative RT-PCR in another independent 15 matched...