title: Identification of chromosomal changes with comparative genomic hybridization in sporadic breast cancer in Mexican women.
abstract: Breast cancer is the second leading cause of death in women older than 35 years in Mexico. In this study, we used comparative genomic hybridization (CGH) to analyze sporadic breast cancers at stages II and III from untreated patients. We obtained 4.1 chromosomal alterations per sample, less than in previous reports. We identified a small region in Xq27 with high-level amplification in 3 of 16 samples. This amplification has been reported only in pancreatic and gastric cancer cell lines and in testis tumors; in addition, this amplification had been reported in one primary breast cancer, but in a more extended region that we identified. We also identified a loss in 2p13, not previously reported in this neoplasia. The most frequent alterations were amplifications in 4q, 5q, 8q, 12p, and 13q and losses in 1p, 8p, 16p, 19q, and Xp. CGH provides data for better understanding of molecular events in this neoplasia.
authors.affiliation: Laboratorio de Genética Molecular, Unidad de Investigación Médica en Genética Humana, Centro Médico Nacional Siglo XXI, IMSS, Av. Cuauhtémoc 330, Col. Doctores, 06725 Mexico City, D.F., Mexico.
authors.forename: Adán
authors.initials: A
authors.lastname: Valladares
authors.forename: Fabio
authors.initials: F
authors.lastname: Salamanca
authors.forename: Eduardo
authors.initials: E
authors.lastname: Madrigal-Bujaidar
authors.forename: Diego
authors.initials: D
authors.lastname: Arenas
mesh_terms: D000328:Adult; D000368:Aged; D001943:Breast Neoplasms / Q000453:epidemiology / Q000235:genetics* / Q000473:pathology; D018270:Carcinoma, Ductal, Breast / Q000453:epidemiology / Q000235:genetics* / Q000473:pathology; D002869:Chromosome Aberrations; D004273:DNA, Neoplasm / Q000235:genetics; D005260:Female; D005784:Gene Amplification; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D008800:Mexico / Q000453:epidemiology; D008875:Middle Aged; D009367:Neoplasm Staging; D009693:Nucleic Acid Hybridization; D014930:Women
chemical_list: D004273:DNA, Neoplasm