ArticleJournal of gastroenterology2007
High polymorphism in the trisomic portion of a gastric cancer cell line.
Article in Journal of gastroenterology, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Who cites it
1 citing paper in PubMed.
- Patient-derived cell lines and orthotopic mouse model of peritoneal carcinomatosis recapitulate molecular and phenotypic features of human gastric adenocarcinoma.Journal of experimental & clinical cancer research : CR · 2021Article
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Authors and funding
4 authors.
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No grant is acknowledged in the PubMed record.
Abstract
backgroundGenetic instability is a hallmark of malignancy, and microsatellite instability is a widely appreciated mechanism of generating genetic changes. We have recently observed four markers clustered on chromosome 20 that showed the effects of microsatellite instability in the gastric adenocarcinoma cell line SNU-1. Each affected marker had alleles of three different sizes. The aim of this study was to investigate the origin for this high-density polymorphism on a single chromosome.
methodsThe high polymorphism located on chromosome 20 was confirmed using 37 additional markers. To further evaluate this finding, 15 clones of the cell line were generated and then assayed with the triallelic markers.
resultsAll told, almost a third of the markers on chromosome 20 had triallelic patterns, but only 0.3% of the markers not on chromosome 20 showed this result. The number of clones showing allelic variation was an average of 50% greater for chromosome 20 markers than for markers elsewhere. A karyotype analysis showed that the progenitor cell line of SNU-1 was trisomic for chromosome 20, and the high polymorphism on that chromosome is almost certainly due to the trisomy.
conclusionsNot only are there more chromosome copies and therefore more gene copies subject to mutation in cells containing trisomy, but also more mutations may be passed on to the progeny. This elevated polymorphism increases the repertoire of genetic changes that could affect cellular growth, and may independently increase genomic instability.
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