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We performed a case-control study (150 cases and 150 controls) to test the association between three polymorphisms in BRCA2 and RAD51 genes and breast cancer risk. Genotypes were determined in DNA from blood cells by PCR–RFLP. Cancer occurrence was strongly associated with the BRCA2 Met/1915Thr homozygous polymorphic variants, whereas heterozygous variant(More)
Matrix metalloproteinases play a crucial role in the cancer invasion and metastasis, angiogenesis and tumorigenicity. A single guanine insertion – the 1G/2G polymorphism in the promoter of the matrix metalloproteinase 1 (MMP-1) gene creates a binding site for the transcription factor AP-1 and thus may affect the transcription level of MMP-1. The C→T(More)
The RAD51 protein and its paralog, XRCC3, play an important role in the repair of DNA double-strand breaks (DSBs) by homologous recombination. Since DSBs may contribute to the pathogenesis of breast cancer and variability in DNA repair genes may be linked with some cancers, we performed a case-control study (135 cases and 175 controls) to check the(More)
AIM Breast cancer is one of the major killers worldwide. The objectives of this study were to determine the frequency of BRCA1 germ-line mutations and the RAD51 G/C polymorphism in patients with breast cancer. METHODS 100 breast cancer women provided blood for mutation analysis. Blood samples age matched healthy individuals (n = 106) served as control.(More)
Impaired DNA repair may fuel up malignant transformation of breast cells due to the accumulation of spontaneous mutations in target genes and increasing susceptibility to exogenous carcinogens. Moreover, the effectiveness of DNA repair may contribute to failure of chemotherapy and resistance of breast cancer cells to drugs and radiation. The breast cancer(More)
A single guanine insertion (1G/2G polymorphism) in the promoter of the matrix metalloproteinase (MMP-1) gene creates a binding site for the transcription factor and may affect the level of transcription of MMP-1. An elevated level of MMP-1 in cancer cells may facilitate their invasion and contribute to metastasis. To evaluate the contribution of 1G/2G(More)
BACKGROUND XRCC2 and XRCC3 genes are structurally and functionally related to RAD51 which plays an important role in homologous recombination, the process frequently involved in cancer transformation. MATERIAL AND METHODS In the present work the distribution of genotypes and frequency of alleles of the RAD51 G135C polymorphism, XRCC2 Arg 188His and XRCC3(More)
The most lethal damage for the cell among all damage is double-strand breaks (DSB) of DNA. DSB cause development of cancer diseases including the triple-negative molecular subtype of breast cancer. The aim of this work was to evaluate the single nucleotide polymorphism -135G>C (rs1801320) of the RAD51 gene encoding DNA repair proteins by homologous(More)
BACKGROUND A C/T transition - rs4987117 (the Thr1915Met polymorphism) and an A/G transition - rs11571653 (the Met784Val polymorphism) in the BRCA2 gene were linked to breast cancer risk in Polish and Japanese populations, respectively. AIM To study the association between polymorphisms of the BRCA2 gene and clinical parameters in breast cancer. METHODS(More)
Genetic polymorphisms in homologous recombination repair genes that can lead to protein haploinsufficiency are generally associated with increased cancer risk. The aim of the present study was to evaluate associations between the risk of breast cancer and single nucleotide polymorphisms in the genes, encoding three key proteins of the homologous(More)