Gut Hormones Secretion across Clusters of Metabolic Syndrome in Prepubertal Children with Obesity.

Abstract

Metabolic Syndrome (MetS) represents a common dysmetabolic state in children with obesity. Although data in youth show a role of gut hormones (GH) in the risk of developing MetS, no data are available during the prepubertal age, especially across clusters of MetS. We characterized components of MetS and changes in GH concentrations in 90 prepubertal children with obesity compared to 30 healthy age- and gender-matched peers. Children with obesity were divided into three groups according to the number of the components of MetS (group 1: 30 obese without components of MetS; group 2: 30 obese with 1 component of MetS; group 3: 30 obese with 2 or more components of MetS). Anthropometric parameters, blood pressure (BP), fasting insulin and glycemia, lipid profile, transaminases, and GH concentration were determined. Differences across the groups were evaluated by the Kruskal-Wallis test and post hoc analysis by Mann-Whitney test. Fasting glycemia and insulin, HOMA-IR, triglycerides, and BP progressively increased and high-density lipoprotein progressively decreased across the groups of children with obesity compared to controls, showing worse values in group 3. GLP-1 and ghrelin values progressively decreased and obestatin progressively increased. The more components of the MetS were present, the further GH concentrations deviated from standard values. Components of MetS and GH concentrations are impaired in prepubertal children with obesity compared to controls. The close association between progressive alterations in GH levels and increasing number of components of the MetS might indicate a role of these hormones in the determination of metabolic risk.