Allelic gains and losses in distinct regions of chromosome 6 in gastric carcinoma

• Type: Article in International Scientific Journal
• Date: 2001

Authors

Carvalho, B (Author) Other; van der Veen, AY (Author) Other; Fátima Gärtner (Author) ICBAS; Carneiro F (Author) FMUP; Seruca, R (Author) FMUP; Buys, CHCM (Author) Other; Kok, K (Author) Other

Journal

Title: Cancer Genetics and Cytogenetics

Vol. 131

Pages: 54-59

ISSN: 0165-4608

Publisher: Elsevier B.V.

Indexing

ISI Web of Knowledge - 11 Citations

Scopus - 11 Citations

Other information

Authenticus ID: P-000-STJ

DOI: 10.1016/s0165-4608(01)00514-3

Abstract (EN): In gastric cancer, alterations in the long arm of chromosome 6 are a frequent event. Two regions of heterozygous loss have been described: 6q16.3 similar to 6q23 and 6q26 similar to 6q27. We have evaluated by microsatellite and FISH analyses the 6q status of three cell lines that we established from primary gastric carcinomas xenografted in nude mice, in order to elucidate the underlying mechanisms of 6q alterations. Alterations of the long arm of chromosome 6 were found in all three xenografts and corresponding cell lines. Allelic imbalance (AI) was found in the three cases, by microsatellite analysis. Fluorescence in situ hybridization analyses clearly demonstrated a duplication of the larger part of the 6q arm in all three cell lines. Two of the cell lines and the corresponding xenografts showed, in addition, complete loss of one of the parental alleles at the terminal part of 6q. Thus, the AI observed along the long arm of chromosome 6 is represented by gain of alleles in one distinct chromosomal segment and loss of alleles in another distinct segment.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6