<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>Many studies have reported aberrations such as amplifications, deletions and translocations of 1q21-q23 in ovarian tumors. These findings increase the scientific interest in analyzing this region using specific gene probes. We investigated the frequency of copy number changes of two specific bacterial artificial chromosomes (BAC) clones in 1q21.3 and 1q23.3 by fluorescent <italic>in situ</italic> hybridization (FISH) on tissue microarrays consisting of 540 ovarian tumors of different malignancies, histology, stage and grade. Such changes in 1q21.3 were established in 9.64% of malignant (2.41% amplification), in 8.33% of low malignant potential (LMP) and in 13.13% of benign ovarian tumors. Copy number changes of 1q23.3 were found in 17.78% of malignant (1.48% amplification), in 16.67% of LMP and in 12.64% of benign ovarian tumors. We found a significantly higher gain of 1q23.3 in non epithelial (50%) compared to epithelial tumors (14.73%) (<italic>p</italic> &lt;0.03). The gain of 1q21.3 prevailed in non serous malignant and LMP ovarian tumors in comparison to serous tumors. In non serous tumors, both gains were associated with higher grade. The frequency of gain in 1q23.3 was 2.5-times higher than that in 1q21.3 of ovarian cancers.</p></abstract>

Many studies have reported aberrations such as amplifications, deletions and translocations of 1q21-q23 in ovarian tumors. These findings increase the scientific interest in analyzing this region using specific gene probes. We investigated the frequency of copy number changes of two specific bacterial artificial chromosomes (BAC) clones in 1q21.3 and 1q23.3 by fluorescent in situ hybridization (FISH) on tissue microarrays consisting of 540 ovarian tumors of different malignancies, histology, stage and grade. Such changes in 1q21.3 were established in 9.64% of malignant (2.41% amplification), in 8.33% of low malignant potential (LMP) and in 13.13% of benign ovarian tumors. Copy number changes of 1q23.3 were found in 17.78% of malignant (1.48% amplification), in 16.67% of LMP and in 12.64% of benign ovarian tumors. We found a significantly higher gain of 1q23.3 in non epithelial (50%) compared to epithelial tumors (14.73%) (p <0.03). The gain of 1q21.3 prevailed in non serous malignant and LMP ovarian tumors in comparison to serous tumors. In non serous tumors, both gains were associated with higher grade. The frequency of gain in 1q23.3 was 2.5-times higher than that in 1q21.3 of ovarian cancers.

Copy Number Changes in 1q21.3 and 1q23.3 have Different Clinical Relevance in Ovarian Tumors

Department of Medical Genetics, Medical University of Sofia, Sofia, Bulgaria

Laboratory "Identity and Plasticity of Tumors", INSERM, Montpellier, France

Second Gynecologic Clinic, University Hospital of Obstetrics and Gynecology "Maichin dom", Sofia, Bulgaria

Balkan Journal of Medical Genetics

Many studies have reported aberrations such as amplifications, deletions and translocations of 1q21-q23 in ovarian tumors. These findings increase the...

Copy Number Changes in 1q21.3 and 1q23.3 have Different Clinical Relevance in Ovarian Tumors

Published Online: Feb 19, 2010

Page range: 29 - 37

DOI: https://doi.org/10.2478/v10034-010-0009-5

Keywords
Ovarian cancer, Copy number changes, Bacterial artificial chromosomes (BAC) clones, Fluorescent hybridization (FISH), Tissue microarray (TMA)

This content is open access.

Copy Number Changes in 1q21.3 and 1q23.3 have Different Clinical Relevance in Ovarian Tumors

Published Online: Feb 19, 2010

Page range: 29 - 37

DOI: https://doi.org/10.2478/v10034-010-0009-5

KeywordsOvarian cancer, Copy number changes, Bacterial artificial chromosomes (BAC) clones, Fluorescent hybridization (FISH), Tissue microarray (TMA)

This content is open access.

Keywords
Ovarian cancer, Copy number changes, Bacterial artificial chromosomes (BAC) clones, Fluorescent hybridization (FISH), Tissue microarray (TMA)