title: Gene copy number variations in breast cancer of Sub-Saharan African women.
abstract: The goal of this study was CGH array profiling of breast cancer from Malian women in order to define differences with those from USA. CGH array was performed in 28 samples, 17 with a triple negative phenotype. The profiles were compared to those of 106 tumors from USA. 6 chromosomal regions (6p21, 9q34, 11q13, 12q24, 17q25 and 22q12.1-22q13.1) were identified with a significant higher rate of copy number alterations. These regions contain several genes of interest including BCR. FISH and IHC confirmed that BCR was amplified and overexpressed particularly in triple negative tumors. Finally, 5 regions presented a high level of amplification in two or more samples, including 2 regions located between 9p22.3-9p23 and 9p23-9p24.1. This study confirms that breast cancers from African women present biological differences with those from USA. Larger studies are needed to go further in the identification of therapeutic targets that would be specific to African women.
authors.affiliation: Service d'Hématologie et d'Oncologie Médicale, Hôpital du point G, Bamako, Mali.
authors.forename: Madani
authors.initials: M
authors.lastname: Ly
authors.forename: Alexander
authors.initials: A
authors.lastname: Valent
authors.forename: Gangaly
authors.initials: G
authors.lastname: Diallo
authors.forename: Frédérique
authors.initials: F
authors.lastname: Penault-Lorca
authors.forename: Klaus
authors.initials: K
authors.lastname: Dumke
authors.forename: Virginie
authors.initials: V
authors.lastname: Marty
authors.forename: Philippe
authors.initials: P
authors.lastname: Viehl
authors.forename: Vladimir
authors.initials: V
authors.lastname: Lazar
authors.forename: Bastien
authors.initials: B
authors.lastname: Job
authors.forename: Catherine
authors.initials: C
authors.lastname: Richon
authors.forename: Veronique
authors.initials: V
authors.lastname: Scott
authors.forename: Dapa Aly
authors.initials: DA
authors.lastname: Diallo
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Bernaudin
authors.forename: Fabrice
authors.initials: F
authors.lastname: Andre
mesh_terms: D044383:Black People / Q000235:genetics*; D002896:Chromosomes, Human, Pair 6; D055028:Comparative Genomic Hybridization; D005260:Female; D005784:Gene Amplification; D018628:Gene Dosage; D015870:Gene Expression; D006801:Humans; D008302:Mali; D008875:Middle Aged; D051562:Proto-Oncogene Proteins c-bcr / Q000235:genetics*; D064726:Triple Negative Breast Neoplasms / Q000235:genetics*; D014481:United States; D001741:Black or African American
chemical_list: D051562:Proto-Oncogene Proteins c-bcr