老年直肠癌患者外周血与癌组织miR-141的表达及其临床相关性

目的 研究老年直肠癌患者外周血与癌组织微小RNA(miR)-141的表达及临床相关性.方法 75例直 肠癌患者取直肠癌组织及癌旁正常组织并抽取肘静脉血,应用实时聚合酶联法检测直肠癌、癌旁正常组织标本和 外周血中miR-141的表达水平,分析直肠癌组织和外周血miR-141的相关性,外周血miR-141与临床病理特征和临 床预后的关系.结果 (1)与健康体检者外周血或者与正常癌旁组织相比,miR-141的表达水平在直肠癌患者外 周血和直肠癌组织中均明显下调(P<0.01);(2)有淋巴结转移的患者中直肠癌组织miR-141水平与外周血 miR-141水平呈正相关(r=0.694,P<0.01),无淋巴结转移的患者中直肠癌组织miR-141水平与外周血miR-141 水平呈正相关(r=0.725,P<0.01);(3)直肠癌患者外周血miR-141表达与肿瘤分期、肿瘤分化程度和有无淋 巴结转移相关;(4)术后6个月随访显示,75例患者中有13例(17.33%)患者出现复发/转移,复发/转移患者 外周血miR-141水平为(2.64±0.34),显著低于未复发/转移患者(P<0.01).结论 miR-141在直肠癌患者外 周血中表达与在癌组织中表达变化趋势一致,可反映直肠癌的临床病理特征.

Expression and clinical correlation of miR-141 in peripheral blood and tumor tissue in elderly patients with rectal cancer

Objective To study the expression and clinical correlation of miR-141 in peripheral blood and tumor tissue in elderly patients with rectal cancer.Methods Rectal tumor tissue and tumor-adjacent normal tissues were taken in 75 cases of rectal cancer.The expression levels of miR-141 in peripheral blood and tumor tissue as well as tumor-adjacent normal tissues were determined by real-time polymerase chain reaction method.The correlation of miR-141 expression between peripheral blood and tumor tissue,and the correlation of peripheral blood miR-141 with clinicopathologic features and clinical prognosis were analyzed.Results (1) Compared with peripheral blood in the subjects undergoing normal physical examination or tumor-adjacent normal tissue in the patients with rectal cancer,the miR-141 expression level in peripheral blood and tumor tissue in the patients with rectal cancer was decreased significantly (P<0.01).(2) The cancer tissue miR-141 level in the patients with lymph node metastasis was positively correlated with peripheral blood miR-141 level (r=0.694,P<0.01),and cancer tissue miR-141 level in the patients without lymph node metastasis was positively correlated with peripheral blood miR-141 level (r=0.725,P<0.01).(3) The differences between peripheral blood miR-141 level with tumor stage,tumor differentiation degree and lymphatic metastasis had statistical significance (P<0.01).(4)The postoperative 6-month follow up displayed that among 75 cases,13 cases(17.33%) appeared replase/ metastasis,and peripheral blood miR-141 level was (2.64±0.34),which was significantly lower than that in the patents without replase/metastasis (P<0.01).Conclusion Expression variation trend of miR-141 in peripheral blood is similar to that in tumor tissue,which can reflect the clinicopathologic feature in the patients with rectal patients.