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Rearrangement and allelic imbalance on chromosome 5 leads to homozygous deletions in the CDKN2A/2B tumor suppressor gene region in rat endometrial cancer
Med Coll Wisconsin, Human & Mol Genet Ctr, Milwaukee, WI 53226 USA.
Univ Gothenburg, CMB Genet, Gothenburg, Sweden.
Univ Gothenburg, CMB Genet, Gothenburg, Sweden.
Univ Gothenburg, CMB Genet, Gothenburg, Sweden.
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2008 (English)In: Cancer Genetics and Cytogenetics, ISSN 0165-4608, E-ISSN 1873-4456, Vol. 184, no 1, 9-21 p.Article in journal (Refereed) Published
Abstract [en]

The inbred BDII rat is a valuable experimental model for the genetic analysis of hormone-dependent endometrial adenocarcinoma (EAC). One common aberration detected previously by comparative genomic hybridization in rat EAC is loss affecting mostly the middle part of rat chromosome 5 (RNO5). First, we applied an RNO5-specific painting probe and four region-specific gene probes onto tumor cell metaphases from 21 EACs, and found that rearrangements involving RNO5 were common. The copy numbers of loci situated on RNO5 were found to be reduced, particularly for the CDKN2A/2B locus. Second, polymerase chain reaction analysis was performed with 22 genes and markers and homozygous deletions of the CDKN2A exon 1β and CDKN2B genes were detected in 13 EACs (62%) and of CDKN2A exon 1α in 12 EACs (57%) Third, the occurrence of allelic imbalance in RNO5 was analyzed using 39 microsatellite markers covering the entire chromosome and frequent loss of heterozygosity was detected. Even more intriguing was the repeated finding of allele switching in a narrow region of 7 Mb across the CDKN2A/2B locus. We conclude that genetic events affecting the middle part of RNO5 (including bands 5q31q33 and the CDKN2A locus) contribute to the development of EAC in rat, with the CDKN2A locus having a primary role.

Place, publisher, year, edition, pages
2008. Vol. 184, no 1, 9-21 p.
National Category
Microbiology in the medical area
Research subject
Medical sciences
Identifiers
URN: urn:nbn:se:his:diva-2926DOI: 10.1016/j.cancergencyto.2008.02.016ISI: 000257415500002PubMedID: 18558284Scopus ID: 2-s2.0-44949156448OAI: oai:DiVA.org:his-2926DiVA: diva2:210416
Available from: 2009-04-01 Created: 2009-04-01 Last updated: 2013-04-12Bibliographically approved

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