Germline BRCA1 mutations and G/C polymorphism in the 5'-untranslated region of the RAD51 gene in Polish women with breast cancer.
Breast cancer is a significant cause of morbidity and mortality in Western countries. In the present work the distribution of genotypes and frequency of alleles of the RAD51 G/C polymorphism and the frequency of BRCA1 germ-line mutations in patients with breast cancer were investigated. One hundred breast cancer women provided blood for mutation analysis. Blood samples from age matched healthy individuals (n=106) served as control. The G/C polymorphism and BRCA1 mutations were determined by PCR-RFLP methods. The distribution of the genotypes of the G/C polymorphism RAD51 in both control and patients did not differ significantly (P>0.05) from those predicted by the Hardy-Weinberg distribution. There were no significant differences in the genotype distributions and allele frequencies between node-positive and node-negative patients. In the present study one Ex20insC mutation of BRCA1 gene was identified in women with breast cancer. Our study implies that the G/C polymorphism of the RAD51 gene may not be directly involved in the development and/or progression of breast cancer. The lack of detectable BRCA1 germ-line mutations in most cases suggests that there are probably additional, as yet unidentified genes predisposing to this disease.
Romanowicz-Makowska
Hanna
H
Laboratory of Molecular Genetics, Department of Pathology, Institute of Polish Mother's Memorial Hospital, Lódź. smolbea@wp.pl
Smolarz
Beata
B
Kulig
Andrzej
A
D020121:5' Untranslated Regions; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001943:Breast Neoplasms / Q000235:genetics* / Q000473:pathology; D004252:DNA Mutational Analysis; D004273:DNA, Neoplasm / Q000032:analysis; D005260:Female; D005787:Gene Frequency; D019398:Genes, BRCA1; D005838:Genotype; D018095:Germ-Line Mutation; D006801:Humans; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D051135:Rad51 Recombinase / Q000235:genetics*
D020121:5' Untranslated Regions; D004273:DNA, Neoplasm; C495153:RAD51 protein, human; D051135:Rad51 Recombinase