The impact of obstructive sleep apnea on endothelial function during weight loss in an obese pediatric population

Sofie Jacobs; Emilie Mylemans; Marijke Ysebaert; Eline Vermeiren; Ann De Guchtenaere; Hilde Heuten; Luc Bruyndonckx; Benedicte Y De Winter; Kim Van Hoorenbeeck; Stijn L Verhulst; Annelies Van Eyck

doi:10.1016/j.sleep.2021.08.002

The impact of obstructive sleep apnea on endothelial function during weight loss in an obese pediatric population

Sleep Med. 2021 Oct:86:48-55. doi: 10.1016/j.sleep.2021.08.002. Epub 2021 Aug 12.

Authors

Affiliations

¹ Laboratory of Experimental Medicine and Pediatrics and Member of the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium. Electronic address: Sofie.Jacobs3@student.uantwerpen.be.
² Laboratory of Experimental Medicine and Pediatrics and Member of the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium. Electronic address: Emilie.Mylemans@student.uantwerpen.be.
³ Laboratory of Experimental Medicine and Pediatrics and Member of the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium. Electronic address: marijke.ysebaert@uza.be.
⁴ Laboratory of Experimental Medicine and Pediatrics and Member of the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium; Department of Pediatrics, Antwerp University Hospital, Edegem, Belgium. Electronic address: eline.vermeiren@uantwerpen.be.
⁵ Het Zeepreventorium, Koninklijke Baan 5, De Haan, Belgium. Electronic address: dr.deguchtenaere@gmail.com.
⁶ Department of Cardiology, Antwerp University Hospital, Edegem, Belgium. Electronic address: hilde.heuten@uza.be.
⁷ Laboratory of Experimental Medicine and Pediatrics and Member of the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium. Electronic address: luc.bruyndonckx@uantwerpen.be.
⁸ Laboratory of Experimental Medicine and Pediatrics and Member of the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium; Department of Gastroenterology and Hepatology, Antwerp University Hospital, Edegem, Belgium. Electronic address: benedicte.dewinter@uantwerpen.be.
⁹ Laboratory of Experimental Medicine and Pediatrics and Member of the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium; Department of Pediatrics, Antwerp University Hospital, Edegem, Belgium. Electronic address: Kim.vanhoorenbeeck@uza.be.
¹⁰ Laboratory of Experimental Medicine and Pediatrics and Member of the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium; Department of Pediatrics, Antwerp University Hospital, Edegem, Belgium. Electronic address: Stijn.verhulst@uantwerpen.be.
¹¹ Laboratory of Experimental Medicine and Pediatrics and Member of the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium; Department of Pediatrics, Antwerp University Hospital, Edegem, Belgium. Electronic address: Annelies.vaneyck@uantwerpen.be.

PMID: 34461597
DOI: 10.1016/j.sleep.2021.08.002

Abstract

Background: Childhood obesity is an increasing problem with substantial comorbidities such as obstructive sleep apnea (OSA) and increased cardiovascular morbidity. Endothelial dysfunction is an underlying mechanism related to both obesity and OSA.

Research question: To investigate the effect of weight loss on endothelial function and OSA in obese children and to determine whether a change in endothelial function can be linked to an improvement in OSA.

Methods: Obese children between 8 and 18 years of age were recruited while entering a 12-month inpatient weight loss program. Patients were followed at 3 study visits: baseline, after 10 months of weight loss, and 6 months after ending the program (18 months). Anthropometry and endothelial function (EndoPAT) were determined at all study visits. At baseline, sleep screening with a portable device (ApneaLink) was performed. This was repeated after 10 months if OSA was diagnosed at baseline.

Results: At baseline, 130 children were included, of which 87 had OSA (67%). Seventy-two patients attended the follow-up visit at 10 months, and 28 patients attended the follow-up visit at 18 months. The BMI z-score decreased after 10 months (from 2.7 (1.4-3.4) to 1.7 (0.5-2.7); p < 0.001) and remained stable at 18 months. Endothelial function improved significantly after weight loss, evidenced by a shorter time to peak response (TPR) and higher reactive hyperemia index (p = 0.02 and p < 0.001), and remained improved after 18 months (p < 0.001 and p = 0.007). After 10 months of weight loss, 10 patients had residual OSA. These patients had a higher TPR at 10 months (225 (75-285)s) than those without OSA (135 (45-225)s) and patients with a normalized sleep study (105 (45-285)s; p = 0.02). Linear mixed models showed that more severe OSA was associated with a worse TPR at baseline and less improvement after weight loss.

Conclusion: Weight loss improves endothelial function in an obese pediatric population. However, even after weight loss, endothelial function improved less in the presence of OSA.

Keywords: Endothelium; Obesity; Obstructive sleep apnea; Pediatrics; Sleep-disordered breathing; Weight loss.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Anthropometry
Body Mass Index
Child
Humans
Pediatric Obesity* / complications
Polysomnography
Sleep Apnea, Obstructive* / complications
Sleep Apnea, Obstructive* / therapy
Weight Loss