Analysis of comparative genomic hybridization and loss of heterozygosity in 43 primary gastric carcinomas  

作　　者：王琦 王柏秋 关新元 高慧 程慧 张岂凡 黄承斌 李璞 傅松滨 

机构地区：[1]Laboratory of Medical Genetics,Department of Biology,Harbin Medical University [2]Queen Mary Hospital, The university of Hong Kong,Room 129, Professorial Block,Pokfulam Road [3]The Third Affiliated Hospital,Harbin Medical University

出　　处：《Chinese Medical Journal》2003年第4期517-523,共7页中华医学杂志（英文版）

基　　金：ThisstudywassupportedbyTeachingandResearchAwardProgramforOutstandingYoungTeachersinHigherEducationInstitutionsFoundationfortheFacultybyMinistryofEducation;andFoundationofHeilongjiangProvinceOutstandingYongScientistAward;andKeyProjectofHeilongjiangEduca

摘　　要：To investigate common chromosomal changes and the LOH frequency of microsatellite loci in primary gastric cancer samples in order to locate the deleted regions in which human gastric cancer related genes might exist Methods Comparative genomic hybridization (CGH) was used to define global chromosomal aberrations in 43 primary gastric tumors Based on the results of CGH, analysis of loss of heterozygosity (LOH) was performed in chromosome 19 in which the loss was first discovered in the gastric cancers The PCR-based approach was used to investigate 22 loci, which are spaced at 1 1-10 9 cM intervals throughout chromosome 19 The amplified PCR fragments were subjected to electrophoresis in PAGE gel and analyzed with Genescan TM and Genotyper TM Results CGH analysis revealed gains in chromosome 3p(8/43), 8q(8/43), 20 [20 (9/43), 20p(7/43), 20q(4/43)], 12q(16/43), 13q(12/43) and losses in 19 [19 (15/43)], 7 [17 (8/43), 17p (10/43)], 16 (10/43) and 1p (11/43) Among the 43 evaluated samples, the most frequent LOH was detected at locus D19S571 (27 81%) Conclusions The tumorigenesis of gastric cancer includes several chromosomal changes The aberration of chromosome 19 was the first common change founded in gastric cancer The region near the D19S571 might harbor potential genes related to the tumorigenesis of gastric cancerTo investigate common chromosomal changes and the LOH frequency of microsatellite loci in primary gastric cancer samples in order to locate the deleted regions in which human gastric cancer related genes might exist Methods Comparative genomic hybridization (CGH) was used to define global chromosomal aberrations in 43 primary gastric tumors Based on the results of CGH, analysis of loss of heterozygosity (LOH) was performed in chromosome 19 in which the loss was first discovered in the gastric cancers The PCR-based approach was used to investigate 22 loci, which are spaced at 1 1-10 9 cM intervals throughout chromosome 19 The amplified PCR fragments were subjected to electrophoresis in PAGE gel and analyzed with Genescan TM and Genotyper TM Results CGH analysis revealed gains in chromosome 3p(8/43), 8q(8/43), 20 [20 (9/43), 20p(7/43), 20q(4/43)], 12q(16/43), 13q(12/43) and losses in 19 [19 (15/43)], 7 [17 (8/43), 17p (10/43)], 16 (10/43) and 1p (11/43) Among the 43 evaluated samples, the most frequent LOH was detected at locus D19S571 (27 81%) Conclusions The tumorigenesis of gastric cancer includes several chromosomal changes The aberration of chromosome 19 was the first common change founded in gastric cancer The region near the D19S571 might harbor potential genes related to the tumorigenesis of gastric cancer

关 键 词：comparative genome hybridization · loss of hetero zygosity · gastric cancer 

分 类 号：R735.2[医药卫生—肿瘤]