Mutational analysis of the beta-catenin gene in gastric carcinomas - PubMed (original) (raw)
. 2001 Mar-Apr;22(2):123-30.
doi: 10.1159/000050606.
Affiliations
- PMID: 11125285
- DOI: 10.1159/000050606
Mutational analysis of the beta-catenin gene in gastric carcinomas
Y Sasaki et al. Tumour Biol. 2001 Mar-Apr.
Abstract
Previous studies reported that mutation of the adenomatous polyposis coli (APC) gene was not observed in the majority of gastric cancers. To evaluate the role of the APC/beta-catenin/Tcf pathway, we analyzed mutations in the beta-catenin gene and the accumulation of beta-catenin protein in gastric carcinomas. An interstitial deletion spanning exon 3 of the beta-catenin gene was observed in 1 of 13 gastric cancer cell lines. No missense mutation was found in these 13 cell lines. Nuclear and/or cytoplasmic localization of beta-catenin was observed in 16 of 70 primary gastric carcinomas by immunohistochemistry, while we found no mutations in exon 3 in 35 carcinoma tissues available for PCR amplification. Our findings suggest that somatic mutations of the beta-catenin gene are rare in human gastric carcinomas and that accumulation of normal beta-catenin protein in a subset of gastric cancers may be due to other mechanisms of its activation.
Copyright 2001 S. Karger AG, Basel
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