P rimary hypertension is a growing concern in children and adolescents in western countries largely because of its association with the ongoing obesity epidemic. Elevated serum uric acid (SUA) levels are frequently found in children with hypertension and obesity.1 Although primary hypertension in children was initially thought to reflect the underlying presence of subtle renal damage and insulin resistance, recent epidemiological and experimental data support the hypothesis that SUA may play an independent pathogenetic role in the early stages of vascular damage and the subsequent development of hypertension.2 Moreover, hyperuricemia has been associated with increased risk of hypertension development in adults in a large number of studies published to date. [3][4][5] Among participants in the Bogalusa Heart Study, SUA levels measured during childhood and greater changes in SUA from youth to adulthood were significant predictors of adult blood pressure (BP) values.6 Accordingly, recent meta-analyses indicate that high SUA levels entail an increased risk of hypertension incidence 7 with a consistent dose-response relationship, which supports causal disease-exposure association. have consistently been demonstrated to induce significant increases in SUA levels. In this context, SUA is emerging as a potentially modifiable risk factor for the prevention and treatment of hypertension. In fact, a reduction in SUA levels has been shown to prevent the development of hypertension in animal models, 10,11 and preliminary clinical trials indicate a BP-lowering effect of SUA reduction by either xanthine
See Editorial Commentary, pp 845-847Abstract-Primary hypertension is a growing concern in children because of the obesity epidemic largely attributable to western lifestyles. Serum uric acid is known to be influenced by dietary habits, correlates with obesity, and could represent a risk factor for hypertension. Preliminary studies in children highlighted uric acid as a potentially modifiable risk factor for the prevention and treatment of hypertension. The effect of lifestyle changes (increase of physical activity and dietary modifications) on blood pressure values, weight status, and serum uric acid levels in a cohort of 248 children referred for cardiovascular risk assessment were evaluated over a mean 1.5-year follow-up. At baseline, 48% of children were obese and 50% showed blood pressure values >90th percentile. At follow-up, a significant improvement in weight class (24% obese; P<0.0001) and blood pressure category (22% >90th percentile; P<0.0001) was found. Systolic blood pressure z-score (P<0.0001), uric acid value (P=0.0056), and puberty at baseline (P=0.0048) were independently associated with higher systolic blood pressure z-score at follow-up, whereas a negative association was observed with body mass index z-score decrease during follow-up (P=0.0033). The risk of hypertension at followup was associated with body mass index (P=0.0025) and systolic blood pressure (P<0.0001) z-score at baseline and inversely related t...