Relationship between promoter methylation and mRNA expression of PTEN gene and gastric carcinoma  

PTEN基因甲基化及其表达异常与胃癌的关系(英文)

作　　者：Song Liu Jieping Yu Ping Fu Honggang Yu 

机构地区：[1]Department of Gastroenterology, The First Hospital of Wuhan, Wuhan 430022, China [2]Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan 430060, China [3]Department of Gastroenterology, The 14th Hospital of Wuhan, Wuhan430200, China

出　　处：《The Chinese-German Journal of Clinical Oncology》2008年第10期580-583,共4页中德临床肿瘤学杂志（英文版）

基　　金：a grant from the National Natural Science Foundation of China(No.30300154)

摘　　要：Objective:To probe into the relationships between PTEN gene expression,the promoter methylation and gastric cancer and its clinical pathological specific features.Methods:We analyzed the PTEN gene promoter methylation and mRNA expression status in gastric cancer tissues and its adjacent normal tissues by methylation specific PCR(MSP) and reverse transcription-polymerase chain reaction(RT-PCR) techniques.Results:PTEN promoters in 48.2%(27/56) gastric cancer tissues and 3.6(2/56) adjacent normal tissues were methylated and the PTEN promoter methylation rate in carcinoma tissues was obviously higher(P < 0.05).Of the 2 cases where the adjacent gastric tissues were methylated,the gastric cancer tissues were both methylated.Of the 29 gastric cancers with lymph node metastasis,19 had their PTEN gene promoters methylated and the PTEN gene promoter methylation in cases with lymph node metastasis was obviously higher than that without lymph node metastasis(P < 0.05).RT-PCR result showed that no expression of PTEN mRNA existed in any of the methylated gastric cancer tissues.Conclusion:The expression loss of PTEN gene mRNA in gastric cancers is related to their promoter methylation and might be one of the reasons for the generation,development and metastasis of gastric cancers.

关 键 词：PTEN gene METHYLATION gastric carcinoma 

分 类 号：R735.2[医药卫生—肿瘤]