微小核糖核酸-25在胃癌患者血清中的异常表达及其临床意义

目的 探讨微小核糖核酸-25(miRNA-25)在胃癌患者血清中的异常表达及其临床意义.方法 选择第四军医大学西京医院手术及随访资料完整的胃癌(86例)、胃腺瘤(70例)患者和健康对照者(80名)为研究对象,提取血清总RNA,在建立了稳定、敏感的血清miRNA-25绝对定量检测方法(qRT-PCR)的基础上,检测胃癌、胃腺瘤患者和健康对照者血清中miRNA-25表达水平.分析胃癌、胃腺瘤和健康对照者血清中的miRNA-25表达差异及血清miRNA-25表达水平与胃癌临床病理参数的关系.结果 胃癌患者血清中miRNA-25的表达水平(135.6 fmol/μg总RNA)显著高于胃腺瘤(67.7 fmol//μg总RNA)和健康对照者(62.2 fmol/μg总RNA,P＜0.01),同时miRNA-25的受试者工作特征曲线显示,血清miRNA-25对胃癌诊断具有良好的特异度和敏感度(曲线下面积=0.827);有淋巴结转移者(148.3±10.2)fmol/μg总RNA]和临床病理分期Ⅲ/Ⅳ期(146.7±9.5)fmol/μg总RNA]胃癌患者血清miRNA-25的表达分别明显高于无淋巴结转移者(120.3±10.1)fmol/μg总RNA]和Ⅰ/Ⅱ期胃癌患者(119.4±12.2)fmol/μg总RNA](P＜0.05);相关性研究结果表明,血清miRNA-25高表达胃癌患者的生存期与血清miRNA-25低表达胃癌患者无明显差异(P＞0.05).结论 血清miRNA-25的检测可能有助于胃癌的诊断和预后预测.

Abstract：

Objective To investigate the abnormal expression of microRNA (miRNA)-25 in the serum of gastric cancer patients and its clinical significance. Methods In Xijing Hospital of Digestive Diseases,Fourth Military Medical University,86 gastric cancer patients with operation and completed follow-up data,70 gastric adenoma patients and 80 healthy controls were selected as study objects.Total RNA was isolated from the serum. After the stable and sensitive miRNA-25 absolute quantity detection method established,the serum levels of miRNA-25 in gastric carcinoma patients,gastric adenoma patients and healthy controls were tested according to this method. The expression differences of miRNA-25 in the serum of patients with gastric cancer and gastric adenoma and healthy controls were analyzed with statistic analysis,and the correlation between miRNA-25 expression level and clinic pathological features of gastric cancer was also analyzed. Results The expression level of miRNA-25 in the serum of gastric cancer patients (135. 6 fmol/μg total RNA) was significantly higher than that of gastric adenoma patients (67. 7 fmol/μg total RNA) and healthy controls (62. 2 fmol/μg total RNA)(P＜0. 01). The receiver operating characterisstic curve of miRNA-25 indicated that serum miRNA-25 with good specificity and sensitivity in gastric cancer diagnosis (AUC=0. 827). The serum level of miRNA-25 in gastric cancer patients with lymph node metastasis (148. 3±10. 2) fmol/μg total RNA] or clinicopathological stage Ⅲ /Ⅳ patients (146. 7±9.5) fmol/μg total RNA] was significantly higher than that of gastric cancer patients without lymph node metastasis (120. 3±10. 1)fmol/μg total RNA] or clinicopathological stage Ⅰ/Ⅱpatients (119. 4±12. 2) fmol/μg total RNA] (P＜0.05). The correlation statistical analysis result indicated that there was no significant difference in survival period between serum miRNA-25 highly expressed and lowly expressed gastric cancer patients (P＞0. 05).Conclusion Serum miRNA-25 testing maybe helpful in diagnosis and prognosis of gastric cancer.

The abnormal expression of microRNA-25 in the serum of gastric cancer patients and its clinical signification

Objective To investigate the abnormal expression of microRNA (miRNA)-25 in the serum of gastric cancer patients and its clinical significance. Methods In Xijing Hospital of Digestive Diseases,Fourth Military Medical University,86 gastric cancer patients with operation and completed follow-up data,70 gastric adenoma patients and 80 healthy controls were selected as study objects.Total RNA was isolated from the serum. After the stable and sensitive miRNA-25 absolute quantity detection method established,the serum levels of miRNA-25 in gastric carcinoma patients,gastric adenoma patients and healthy controls were tested according to this method. The expression differences of miRNA-25 in the serum of patients with gastric cancer and gastric adenoma and healthy controls were analyzed with statistic analysis,and the correlation between miRNA-25 expression level and clinic pathological features of gastric cancer was also analyzed. Results The expression level of miRNA-25 in the serum of gastric cancer patients (135. 6 fmol/μg total RNA) was significantly higher than that of gastric adenoma patients (67. 7 fmol/μg total RNA) and healthy controls (62. 2 fmol/μg total RNA)(P＜0. 01). The receiver operating characterisstic curve of miRNA-25 indicated that serum miRNA-25 with good specificity and sensitivity in gastric cancer diagnosis (AUC=0. 827). The serum level of miRNA-25 in gastric cancer patients with lymph node metastasis (148. 3±10. 2) fmol/μg total RNA] or clinicopathological stage Ⅲ /Ⅳ patients (146. 7±9.5) fmol/μg total RNA] was significantly higher than that of gastric cancer patients without lymph node metastasis (120. 3±10. 1)fmol/μg total RNA] or clinicopathological stage Ⅰ/Ⅱpatients (119. 4±12. 2) fmol/μg total RNA] (P＜0.05). The correlation statistical analysis result indicated that there was no significant difference in survival period between serum miRNA-25 highly expressed and lowly expressed gastric cancer patients (P＞0. 05).Conclusion Serum miRNA-25 testing maybe helpful in diagnosis and prognosis of gastric cancer.