LINKAGE OF BODY MASS INDEX AND ANTHROPOMETRIC, LABORATORY PARAMETERS IN HYPERTENSIVE PATIENTS DEPENDING ON ANGIOTENSINOGEN (AGT, RS699) GENE POLYMORPHISM

Abstract

Objective: The aim of the study was to analyze the correlations between body mass index (BMI) and clinical and laboratory parameters in patients with essential hypertension (EH) depending on angiotensinogen gene (AGT, rs699) polymorphism. Design and method: The case-control study involved 72 patients with stage II EH, 1–3 degrees of blood pressure (BP) elevation, high and very high cardiovascular risk (CVR) (29.16% men, 70.84% women). The mean age of patients was 59.87±7.98 yo. The control group consisted of 48 healthy individuals comparable in age and gender. Polymorphism of the AGT gene (rs699) was studied by polymerase chain reaction (PCR). BMI was defined as the ratio of weight to square of height (kg/m2). All enrolled/screened patients signed the Informed Consent to participate in the research. The parathyroid hormone (PTH) and vitamin 25 (OH) D levels in blood serum were determined by chemiluminescence immunoassay (MAGLUMI). Results: In TT-genotype carriers of the AGT gene (rs699) BMI was directly related to anthropometric parameters of waist circumference (WC), hip circumference (HC) and waist-hip ratio (WHR) (r = 0.70–0.81; p < 0.022), the concentration of vitamin D (r = 0.65; p = 0.043) and inversely with the blood level of ionized Ca2+ (r = -0.71; p = 0.02). Correlation matrix of laboratory, anthropometric indicators in hypertensive TC-genotype carriers showed that BMI is directly related to WC and HC (r = 0.68; p < 0.001 and r = 0.84; p < 0.001), as well as to PTH level (r = 0.43; p = 0.004), with a negative correlation with vitamin D level (r = -0.38 P = 0.011). PTH directly depends on BMI, WC and HC (r = 0.31–0.43; p < 0.042–0.004). A direct link between BMI and WC and HC was found in CC-genotype carriers (r = 0.73; p<0.001 and r = 0.78; p<0.001). Conclusions: Thus, the correlation matrix showed that BMI directly depended on the anthropometric parameters of WC, HC and/or WHR (r = 0.68-0.84; p<0.022-0.001) regardless of the AGT gene genotypes (r = 0,52-0.86; p<0.02-0.001) and inversely correlated with ionized Ca2+ level in the blood (r = -0.71; p = 0.02), but only in TT-genotype carriers of the AGT gene (rs699).