临床外科杂志
臨床外科雜誌
림상외과잡지
JOURNAL OF CLINICAL SURGERY
2014年
5期
347-350
,共4页
胃癌%E-cad DNA甲基化%E-cad蛋白%E-cad mRNA%预后
胃癌%E-cad DNA甲基化%E-cad蛋白%E-cad mRNA%預後
위암%E-cad DNA갑기화%E-cad단백%E-cad mRNA%예후
gastric carcinoma%methylation of E-cad DNA%E-cad protein%E-cad mR-NA%prognosis
目的:从DNA、RNA和蛋白水平分析胃癌中E-cadherin( E-cad)表达,旨在探讨E-cad在胃癌侵袭转移中的作用及对预后的影响。方法分别应用免疫组化SP法及原位杂交检测60例胃癌组织和癌旁组织中的E-cad蛋白表达及E-cad mRNA表达;同时应用MSP法检测E-cad DNA甲基化水平。结果 E-cad mRNA和 E-cad蛋白在胃癌中的阳性表达显著低于癌旁组织,E-cad DNA甲基化在胃癌阳性表达率高于癌旁组织。E-cad DNA甲基化与E-cad蛋白、E-cad mRNA在胃癌中的表达缺失呈负相关性(r=-0.335,r=-0.271),E-cad基因甲基化与胃癌5年生存率成负相关(r =-0.381,P﹤0.01)。E-cad蛋白表达与胃癌5年生存率成正相关,(r=0.378,P﹤0.01)。结论 E-cad低表达是胃癌的重要生物学特征,而E-cad甲基化可能是导致胃癌E-cad mRNA和E-cad蛋白低表达的重要原因,E-cad甲基化水平可以作为预测胃癌侵袭转移及预后的重要指标。
目的:從DNA、RNA和蛋白水平分析胃癌中E-cadherin( E-cad)錶達,旨在探討E-cad在胃癌侵襲轉移中的作用及對預後的影響。方法分彆應用免疫組化SP法及原位雜交檢測60例胃癌組織和癌徬組織中的E-cad蛋白錶達及E-cad mRNA錶達;同時應用MSP法檢測E-cad DNA甲基化水平。結果 E-cad mRNA和 E-cad蛋白在胃癌中的暘性錶達顯著低于癌徬組織,E-cad DNA甲基化在胃癌暘性錶達率高于癌徬組織。E-cad DNA甲基化與E-cad蛋白、E-cad mRNA在胃癌中的錶達缺失呈負相關性(r=-0.335,r=-0.271),E-cad基因甲基化與胃癌5年生存率成負相關(r =-0.381,P﹤0.01)。E-cad蛋白錶達與胃癌5年生存率成正相關,(r=0.378,P﹤0.01)。結論 E-cad低錶達是胃癌的重要生物學特徵,而E-cad甲基化可能是導緻胃癌E-cad mRNA和E-cad蛋白低錶達的重要原因,E-cad甲基化水平可以作為預測胃癌侵襲轉移及預後的重要指標。
목적:종DNA、RNA화단백수평분석위암중E-cadherin( E-cad)표체,지재탐토E-cad재위암침습전이중적작용급대예후적영향。방법분별응용면역조화SP법급원위잡교검측60례위암조직화암방조직중적E-cad단백표체급E-cad mRNA표체;동시응용MSP법검측E-cad DNA갑기화수평。결과 E-cad mRNA화 E-cad단백재위암중적양성표체현저저우암방조직,E-cad DNA갑기화재위암양성표체솔고우암방조직。E-cad DNA갑기화여E-cad단백、E-cad mRNA재위암중적표체결실정부상관성(r=-0.335,r=-0.271),E-cad기인갑기화여위암5년생존솔성부상관(r =-0.381,P﹤0.01)。E-cad단백표체여위암5년생존솔성정상관,(r=0.378,P﹤0.01)。결론 E-cad저표체시위암적중요생물학특정,이E-cad갑기화가능시도치위암E-cad mRNA화E-cad단백저표체적중요원인,E-cad갑기화수평가이작위예측위암침습전이급예후적중요지표。
Objective To investigate the role and prognostic impact of E-cadherin( E-cad)on in-vasion and metastasis of gastric carcinoma by analyzing E-cadherin expression at DNA,RNA and protein levels. Methods RNA and protein expression of E-cad were tested in 60 cases of gastric carcinoma and adjacent tissues by streptavidin peroxidase( SP )immunohistochemistry and in situ hybridization. DNA methylation of E-cad was tested with methylation-specific polymerase chain reaction( MSP). Results The positive rates of E-cadherin protein and mRNA in gastric carcinoma were significantly lower than those in adjacent tissues. DNA methylation of E-cad negatively correlated with the E-cad protein and RNA expres-sion in gastric carcinoma respectively(r= -0. 355,r = -0. 271). DNA methylation of E-cad negatively correlated with the 5-year survival rate of gastric carcinoma(r = -0. 381,P ﹤0. 01). However,E-cad protein positively correlated with the 5-year survival rate of gastric carcinoma(r=0. 378,P﹤0. 01). Con-clusion The decreased expression of E-cad is one of the most important biological features in gastric car-cinoma. Methylation of E-cad DNA may be an important agent causing low expression of E-cad protein and mRNA and it can be used as an important indicator in predicting invasion and metastasis of gastric cancer.