FETUIN A DEFICIENCY IS ASSOCIATED WITH ARTERIAL DAMAGE IN PEDIATRIC PATIENTS WITH PRIMARY HYPERTENSION

Abstract

Abstract Objective: Circulating calcification inhibitors: fetuin A (FA) and osteoprotegerin (OPG) together with soluble ligand of the receptor activator of nuclear factor kappa-B (sRANKL) have been linked to vascular calcifications and subclinical arterial damage. The aim of the study was to evaluate the relationship between FA, OPG, sRANKL and arterial damage in children with primary hypertension (PH). Design and method: We performed cross-sectional analysis of FA, OPG, sRANKL, peripheral and central blood pressure (BP), ambulatory blood pressure monitoring (ABPM), parameters of arterial damage including common carotid artery intima media thickness (cIMT), pulse wave velocity (PWV), augmentation index normalized to heart rate of 75 beats per minute (AIx75HR) and ECHO-tracking (ET) analysis of carotid artery stiffness in 60 patients with PH (age: 14.84 ± 3.05 years) and 20 healthy children (age 14.11 ± 2.99 years). Results: Children with PH had significantly higher peripheral and central BP, BP in ABPM, thicker cIMT, higher PWV, and AIx75HR. FA was significantly lower in patients with PH compared to healthy peers (340.57 ± 70.43 vs. 389.19 ± 99.22 [mg/mL], P = 0.019) without differences in OPG, sRANKL, and OPG/sRANKL and OPG/FA ratios. In children with PH, FA level correlated negatively with cIMT Z-score and ET AIx; sRANKL level correlated negatively with ABPM, systolic blood pressure (SBP), SBP load, diastolic BP load, and AIx75HR; OPG/sRANKL ratio correlated positively with SBP load, while OPG/FA ratio correlated positively with ET AIx. In multivariate analysis FA was a significant determinant of cIMT [mm] and cIMT Z-score (beta = -0.208, 95%CI (-0.407 - -0.009), P = 0.041 and beta = -0.224, 95%CI (-0.435 - -0.013), P = 0.038, respectively). Conclusions: In children with PH arterial damage is related to fetuin A deficiency.