Ассоциативная роль полиморфизма гена eNOS (4a/4b) в развитии артериальной гипертензии у больных ревматоидным артритом

Abstract

Aim: to study a contribution of eNOS (4a/4b) gene polymorphism in the development of arterial hypertension (AH) in patients with rheumatoid arthritis (RA).Patients and Methods: 143 patients with RA were examined, among which a group of patients without AH (n=50) and a group of patients with RA in association with AH (n=93) were selected. Healthy volunteers (n=151) were also divided into 2 groups, comparable in age and gender to the main groups. A range of clinical, laboratory, and instrumental methods were used in this study. We also conducted molecular genetics. Blood samples were taken from all patients in the study. DNA was isolated using the phenol-chloroform DNA extraction method. Genotyping for the eNOS gene was performed by PCR-RFLP (Polymerase Chain Reaction — Restriction Fragment Length Polymorphism) analysis. PCR was performed with a set of primers to the corresponding genome regions. PCR products were analyzed by electrophoresis in a 4% polyacrylamide gel followed by staining with ethidium bromide.Results: during the molecular genetics, there was a statistically significant prevalence of 4a/4a homozygous genotype and 4a alleles of eNOS gene polymorphism in patients with RA in association with AH versus these parameters in patients with RA without AH. The estimated risk concerning odds ratio of RA occurrence in association with AH in carriers of 4a/4a genotype in the eNOS gene was 3.635 times higher versus carriers of 4a/4b and 4b/4b genotypes. 4a allele was significantly more common in the group of patients with RA in association with AH versus the control group (OR=3.458 [95% CI 1.571–4.575]; p<0.05). There were no statistically significant values in the group of patients with RA without AH versus the control group with healthy volunteers.Conclusion: 4а/4a homozygous genotype and 4a allele of the eNOS 4a/4b gene polymorphism are predictors of RA development in association with AH.KEYWORDS: rheumatoid arthritis, cardiovascular pathology, arterial hypertension, molecular genetics, single-nucleotide polymorphism, genetic association.FOR CITATION: Chernova A.A., Nikulina S.Yu., Tolstokorova Yu.A. Association of eNOS (4a/4b) gene polymorphism with the development of arterial hypertension in patients with rheumatoid arthritis. Russian Medical Inquiry. 2020;4(8):471–474. DOI: 10.32364/2587-6821-2020-4-8-471-474.