长链非编码核糖核酸Malat-1、p21和GAS5在大肠癌组织中的表达及其诊断价值

摘要

目的 研究长链非编码核糖核酸肺癌转移相关转录本1(metastasis-associated lung adenocarcinoma transcript1,Malat-1)、p21和生长停滞特异性转录因子5(growth arrest-specific 5,GAS5)在大肠癌中的表达及诊断价值.方法 选择大肠癌早期和中晚期病变(含癌旁病变)、癌前病变、良性腺瘤和非肿瘤性病变各33例内镜下或手术切除标本,行RT-PCR法检测组织中Malat-1、p21和GAS5的表达水平,ELISA法检测血清癌胚抗原(carcino-embryonic antigen,CEA)和糖链抗原(carbohydrate antigen19-9,CA19-9)的表达水平.结果 RT-PCR法显示大肠癌早期、中晚期和癌前病变组中Malat-1、p21和GAS5的表达水平显著高于癌旁病变、良性腺瘤和非肿瘤性病变,中晚期组最高(P＜0.05);非肿瘤性病变组的CEA和CA19-9水平显著低于其他组(均P＜0.05),其他5组间比较差异无统计学意义.RT-PCR法检测的Malat-1、p21和GAS5诊断大肠癌的受试者工作曲线(operator characteristic curve,ROC),分析比较曲线下面积(area under the curve,AUC),差异无统计学意义(P＞0.05).病理检测结果显示:大肠癌早期、中晚期和癌前病变组各种病理改变显著多于癌旁病变、良性腺瘤和非肿瘤性病变,中晚期组最明显.结论 非编码核糖核酸Malat-1、p21和GAS5在大肠癌不同时期组织中有差异性表达,可作为诊断大肠癌和癌前病变的重要指标.%Objective To study the expression and diagnostic values of long non-coding RNA(IncRNA)metastasis-associated lung adenocarcinoma transcript 1 (Malat-1),p21 and growth arrest-specific 5 (GAS5)in colorectal cancer tissue.Methods Coloreetal cancer of early stage and advanced stage(including paracareinoma tissue),precancerous lesion,benign tumor and noncancer lesion groups were collected,33 cases in each group.The levels of Malat-1,p21 and GAS5 in colorectal tissue of the 6 groups were detected by reverse transcription-polymerase chain reaction(RT-PCR).Serum carcinoembryonic antigen(CEA)and carbohydrate antigen19-9(CA19-9)were detected by ELISA.Results RT-PCR showed the levels of Malat-1,p21 and GAS5 were significantly higher in colorectal cancer of early and advanced stage and precancerous lesion than in the paracarcinoma lesion,benign tumor and non-cancer lesion(P＜0.05).Malat-1,p21 and GAS5 were the highest in the advanced stage group(P＜0.05).The levels of CEA and CA19-9 in non-cancer lesion were the least(P＜0.05).The AUC of ROC analysis operator characteristic curve(ROC)of Malat-1,p21 and GAS5 was comparable(P＞0.05).Pathological changes showed the pathological changes in colorectal cancer of early stage,advanced stage and precancerous lesion were more significant than those in the paracarcinoma lesion,benign tumor and non-cancer lesion (P＜ 0.05),which were the most significant in the advanced stage group.Conclusion The levels of Malat-1,p21 and GAS5.in colorectal cancer tissues could be good indicators for colorectal cancer diagnosis.