Monosomy of chromosome 8 could be considered as a primary preneoplastic event in breast cancer: A preliminary study

García Parra-Pérez,Fabiola A.; Zavala-Pompa,Angel; Pacheco‑Calleros,Javier; Cortés-Gutiérrez,Elva  I.; Cerda‑Flores,Ricardo  M.; Lara‑Miranda,Sandra; Dávila-Rodríguez,Martha  I.

doi:10.3892/ol.2011.484

Monosomy of chromosome 8 could be considered as a primary preneoplastic event in breast cancer: A preliminary study

Authors:
- Fabiola A. García Parra-Pérez
- Angel Zavala-Pompa
- Javier Pacheco‑Calleros
- Elva I. Cortés-Gutiérrez
- Ricardo M. Cerda‑Flores
- Sandra Lara‑Miranda
- Martha I. Dávila-Rodríguez
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Affiliations: Department of Anatomical Pathology, High Specialty Medical Unit No.25, Mexican Institute of Social Security (IMSS), Monterrey, Nuevo León, México, Department of Genetics, Biomedical Research Center of Northeast, Mexican Institute of Social Security (IMSS), Monterrey, Nuevo León, México, School of Nursing and Center for Research and Development in Health Sciences, University of Nuevo León, Monterrey, Nuevo León, Mexico
Published online on: November 15, 2011 https://doi.org/10.3892/ol.2011.484
Pages: 445-449

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Abstract

This pilot study analyzed and compared the presence of chromosome 8 aneusomy in Mexican women with breast cancer and adjacent, intraductal, proliferative lesions. To determine the chromosome 8 copy number, we performed fluorescence in situ hybridization in nine patients (1800 cells) who underwent mastectomy. We selected two tissue samples from each patient, one corresponding to the invasive ductal carcinoma (IDC) and the other adjacent to the intraductal proliferative lesion (IPL). Breast tissue from 17 autopsy samples (1700 cells) was used as a control. The number of cells with monosomy, disomy and polysomy per subject and type of tissue were compared among the three groups of tissue with the RxC statistical software package using 50,000 total replicates. Chromosome 8 aneusomy was found in 66 and 67% of cells from the IDC and IPL samples, respectively. Monosomy was detected significantly more frequently in IPL compared with IDC samples (49.11 vs. 27.11%; p=0.0000), whereas polysomy was significantly more frequent in IDC compared with IPL samples (40.11 vs. 16.99%; p=0.00000). Control cells showed 92.3% disomy. These findings suggest that polysomy of chromosome 8 is more frequently observed in IDC and that monosomy is more frequent in tissue of IPL. Therefore, monosomy may be considered as a primary preneoplastic event. Future studies should be performed to increase the amount of breast tissue with ductal proliferative changes and with cancer, in order to support the results of this pilot study.

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