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

Qi Wang, Baiqiu Wang, Xinyuan Guan, Hui Gao, Hui Cheng, Qifan Zhang, Chengbin Huang, Pu Li, Songbin Fu

    Research output: Contribution to journalArticle

    8 Scopus citations

    Abstract

    Objective. 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™ and Genotyper™. 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 1 p (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.

    Original languageEnglish (US)
    Pages (from-to)517-523
    Number of pages7
    JournalChinese medical journal
    Volume116
    Issue number4
    StatePublished - Apr 1 2003

    Keywords

    • Comparative genome hybridization
    • Gastric cancer
    • Loss of heterozygosity

    ASJC Scopus subject areas

    • Medicine(all)

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  • Cite this

    Wang, Q., Wang, B., Guan, X., Gao, H., Cheng, H., Zhang, Q., Huang, C., Li, P., & Fu, S. (2003). Analysis of comparative genomic hybridization and loss of heterozygosity in 43 primary gastric carcinomas. Chinese medical journal, 116(4), 517-523.