GENETIC VARIATION OF THE BRCA1 AND BRCA2 GENES IN MACEDONIAN PATIENTS
Maleva I1, Madjunkova S1, Bozhinovski G1, Smickova E2, Kondov G3, Spiroski Z3, Arsovski A4, Plaseska-Karanfilska D1,*
*Corresponding Author: Professor Dr. Dijana Plaseska-Karanfilska, Research Centre for Genetic Engineering and Biotechnology “Georgi D. Efremov,” Macedonian Academy of Sciences and Arts, Krste Misirkov 2, Skopje 1000, Republic of Macedonia; Tel: +389(0)2 3235410; Fax: +389 (0)2 3115434; E-mail: dijana@manu.edu.mk
page: 81
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Abstract

The most significant and well characterized genetic risk factors for breast and/or ovarian cancer are germline mutations in the BRCA1 and BRCA2 genes. The BRCA1 and BRCA2 gene mutations strikingly increase breast cancer risk, suggesting that polymorphisms in these genes are logical candidates in seeking to identify low penetrance susceptibility alleles. The aim of this study was to initiate a screen for BRCA1/2 gene mutations in order to identify the genetic variants in the Republic of Macedonia, and to evaluate the association of several single nucleotide polymorphisms (SNPs) in these genes with breast cancer risk. In this study, we included 100 patients with invasive breast cancer from the Republic of Macedonia, classified according to their family history and 100 controls. The methodology included direct sequencing, single nucleotide primer extension method and multiplex ligation probe amplification (MLPA) analysis, all followed by capillary electrophoresis (CE) on an ABI PRISM™ 3130 Genetic Analyzer. We identified a total of seven carriers of mutations in the BRCA1/2 genes. None of the tested polymorphisms was associated with sporadic breast cancer risk, however, polymorphism rs8176267 in BRCA1 and N372H in BRCA2 showed an association with breast cancer risk in patients with at least one family member with breast cancer.



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