Identification of a new target region on the long arm of chromosome 7 in gastric carcinoma by loss of heterozygosity.

Abstract:

AIM:To define the common deleted region on the long arm of haman chromosome 7q linked to primary gastric carcinomas in Chinese by loss of heterozygosity (LOH) and its clinical significance. METHODS:Nine microsatellite markers distributed over chromosome 7q with an average marker density of 10cM were used to examine 70 primary gastric carcinomas for LOH by PCR amplification. The PCR products were separated by electrophoresis on polyacrylamide gel. Genescan and Genotyper softwares were used to analyze LOH. RESULTS:LOH with at least one marker on 7q occurred in 34.3% (12/50) of the tumors. Among them, LOH at D7S486 and D7S798 was higher in 24.0% (24/70) and 19.2% (5/26), respectively. By statistical analysis we also observed an obvious genotype-phenotype correlation on 7q (P<0.05). The frequency of LOH at D7S486 in patients with lymph node metastasis was significantly higher than that in those without lymph node metastasis (P=0.015). CONCLUSION:The high incidence of LOH at D7S486 and its correlation with poorer prognosis suggest that there might be putative tumor suppressor genes in this region involved in the tumorigenesis and progression of gastric carcinoma.

journal_name

World J Gastroenterol

authors

Weng DS,Li JT,Mai SJ,Pan ZZ,Feng BJ,Feng QS,Huang LX,Wang QJ,Li YQ,Yu XJ,Chen SP,He J,Xia JC

doi

10.3748/wjg.v12.i15.2437

subject

Has Abstract

pub_date

2006-04-21 00:00:00

pages

2437-40

issue

15

eissn

1007-9327

issn

2219-2840

journal_volume

12

pub_type

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