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Cancer Cell International
Published in: Cancer Cell International 1/2011

Open Access 01-12-2011 | Primary research

SKY analysis revealed recurrent numerical and structural chromosome changes in BDII rat endometrial carcinomas

Authors: Eva Falck, Carola Hedberg, Karin Klinga-Levan, Afrouz Behboudi

Published in: Cancer Cell International | Issue 1/2011

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Abstract

Background

Genomic alterations are common features of cancer cells, and some of these changes are proven to be neoplastic-specific. Such alterations may serve as valuable tools for diagnosis and classification of tumors, prediction of clinical outcome, disease monitoring, and choice of therapy as well as for providing clues to the location of crucial cancer-related genes.
Endometrial carcinoma (EC) is the most frequently diagnosed malignancy of the female genital tract, ranking fourth among all invasive tumors affecting women. Cytogenetic studies of human ECs have not produced very conclusive data, since many of these studies are based on karyotyping of limited number of cases and no really specific karyotypic changes have yet been identified. As the majority of the genes are conserved among mammals, the use of inbred animal model systems may serve as a tool for identification of underlying genes and pathways involved in tumorigenesis in humans. In the present work we used spectral karyotyping (SKY) to identify cancer-related aberrations in a well-characterized experimental model for spontaneous endometrial carcinoma in the BDII rat tumor model.

Results

Analysis of 21 experimental ECs revealed specific nonrandom numerical and structural chromosomal changes. The most recurrent numerical alterations were gains in rat chromosome 4 (RNO4) and losses in RNO15. The most commonly structural changes were mainly in form of chromosomal translocations and were detected in RNO3, RNO6, RNO10, RNO11, RNO12, and RNO20. Unbalanced chromosomal translocations involving RNO3p was the most commonly observed structural changes in this material followed by RNO11p and RNO10 translocations.

Conclusion

The non-random nature of these events, as documented by their high frequencies of incidence, is suggesting for dynamic selection of these changes during experimental EC tumorigenesis and therefore for their potential contribution into development of this malignancy. Comparative molecular analysis of the identified genetic changes in this tumor model with those reported in the human ECs may provide new insights into underlying genetic changes involved in EC development and tumorigenesis.
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Metadata
Title
SKY analysis revealed recurrent numerical and structural chromosome changes in BDII rat endometrial carcinomas
Authors
Eva Falck
Carola Hedberg
Karin Klinga-Levan
Afrouz Behboudi
Publication date
01-12-2011
Publisher
BioMed Central
Published in
Cancer Cell International / Issue 1/2011
Electronic ISSN: 1475-2867
DOI
https://doi.org/10.1186/1475-2867-11-20

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