title: Impact of Lifestyle Intervention on HDL-Induced eNOS Activation and Cholesterol Efflux Capacity in Obese Adolescent.
abstract: Background.Endothelial dysfunction occurs in obese children and adolescent and is regarded as a key step in the development of atherosclerosis. Important components for the development of endothelial dysfunction are reduced activity of endothelial nitric oxide synthase (eNOS) and an increase in cholesterol deposition in the vessel wall, due to reduced reverse cholesterol transport (RCT) activity. High density lipoprotein (HDL) exhibits antiatherosclerotic properties including modulation of eNOS activity and cholesterol efflux capacity. Lifestyle intervention programs can modify endothelial dysfunction in obese adolescents, but their impact on HDL-mediated eNOS activation and RCT is unknown so far.Methods.Obese adolescents (15 ± 1 years, BMI > 35 kg/m2) where randomized either to an intervention group (IG,n= 8; restricted diet and exercise) or to a usual care group (UC,n= 8). At the beginning and after 10 months of treatment HDL-mediated eNOS phosphorylation and cholesterol efflux capacity were evaluated.Results.Ten months of treatment resulted in a substantial weight loss (-31%), an improvement of endothelial function, and an increase in HDL-mediated eNOS-Ser1177phosphorylation and RCT. A correlation between change in eNOS-Ser1177phosphorylation or RCT and change in endothelial function was noted.Conclusion.A structured lifestyle intervention program improves antiatherosclerotic HDL functions, thereby positively influencing endothelial function.
authors.affiliation: University of Leipzig, Heart Center Leipzig, Leipzig, Germany.
authors.forename: Jenny
authors.initials: J
authors.lastname: Wesnigk
authors.affiliation: Antwerp University Hospital, Laboratory of Cellular and Molecular Cardiology, Edegem, Belgium; Antwerp University Hospital, Department of Pediatrics, Edegem, Belgium; Cardiovascular Diseases, Department of Translational Pathophysiological Research, University of Antwerp, Antwerp, Belgium; Laboratory of Experimental Medicine and Pediatrics, University of Antwerp, Antwerp, Germany.
authors.forename: Luc
authors.identifier: 0000-0002-2315-9925
authors.initials: L
authors.lastname: Bruyndonckx
authors.affiliation: Antwerp University Hospital, Laboratory of Cellular and Molecular Cardiology, Edegem, Belgium; Cardiovascular Diseases, Department of Translational Pathophysiological Research, University of Antwerp, Antwerp, Belgium.
authors.forename: Vicky Y
authors.identifier: 0000-0001-7595-945X
authors.initials: VY
authors.lastname: Hoymans
authors.affiliation: Zeepreventorium, De Haan, Belgium.
authors.forename: Ann
authors.initials: A
authors.lastname: De Guchtenaere
authors.affiliation: University of Leipzig, Heart Center Leipzig, Leipzig, Germany.
authors.forename: Tina
authors.initials: T
authors.lastname: Fischer
authors.affiliation: University of Leipzig, Heart Center Leipzig, Leipzig, Germany.
authors.forename: Gerhard
authors.initials: G
authors.lastname: Schuler
authors.affiliation: Antwerp University Hospital, Laboratory of Cellular and Molecular Cardiology, Edegem, Belgium; Cardiovascular Diseases, Department of Translational Pathophysiological Research, University of Antwerp, Antwerp, Belgium.
authors.forename: Christiaan J
authors.initials: CJ
authors.lastname: Vrints
authors.affiliation: University of Leipzig, Heart Center Leipzig, Leipzig, Germany.
authors.forename: Volker
authors.identifier: 0000-0002-5090-9154
authors.initials: V
authors.lastname: Adams