Hypermethylation of the BRCA2 gene promoter and its co-hypermethylation with the BRCA1 gene promoter in patients with breast cancer.

Background: The BRCA2 gene is an important tumour suppressor in breast cancer, and alterations in BRCA2 may lead to cancer progression. The aim of the study was to investigate the association of hypermethylation of the BRCA2 gene promoter and its co-hypermethylation with the BRCA1 gene promoter with the development and course of breast cancer in women.

Methods: This study included 74 women with breast cancer (tumour tissue samples and peripheral blood) and 62 women without oncological pathology (peripheral blood) - control group.

Clinical significance of determining the hypermethylation of the RUNX3 gene promoter and its cohypermethylation with the BRCA1 gene for patients with breast cancer.

Purpose: The aim of this study was to assess the clinical significance of RUNX3 gene hypermethylation in the pathogenetic mechanisms of breast cancer in women, taking into account its cohypermethylation with the BRCA1 gene.

Methods: This study included 74 women with newly diagnosed breast cancer (samples from female primary breast carcinomas and paired peripheral blood samples) and 62 women without oncological pathology-control group (peripheral blood samples). Epigenetic testing for hypermethylation status studying was performed in all samples on freshly collected material with the addition of a preservative before the storage and DNA isolation.

Hyperhomocysteinemia in men and women of married couples with reproductive disorders. What is the difference?

Hyperhomocysteinemia (HHcy) is an autosomal recessive inherited metabolic disease caused by variations in folate metabolism genes, characterized by impaired methionine metabolism and accumulation of homocysteine (Hcy) in the blood serum. It was shown that men usually have higher plasma Hcy levels than women, but have not yet assessed the leading factors of these differences, which is important for the development of personalized protocols for the prevention of folate metabolism disorders in couples with reproductive disorders. This study aimed to analyze the effect of intergenic and gene-factor interactions on the risk of developing HHcy in men and women of married couples with reproductive disorders.

Methylation of promoter region of BRCA1 gene versus pathogenic variants of gene: risk factor or clinical marker of breast cancer.

Background: In this study, we compared the contribution of pathogenic variants of the BRCA1/2 genes (5382insC, 185delAG, 6174delT, 4153delA, T300G) and hypermethylation of the BRCA1 gene promoter region to the risk of breast cancer and clinical features in women.

Methods: This study enrolled 74 women (tumor tissue, blood) with newly diagnosed breast cancer and 62 women (blood) without oncological pathology (control group). Molecular genetic testing of samples and determination of hypermethylation status were performed on freshly collected material with the addition of a preservative before the procedure of DNA isolation.