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Systemic inflammation in non-obese children with obstructive sleep apnea
David Gozal1, Laura D Serpero, Oscar Sans Capdevila
1Division of Pediatric Sleep Medicine and Kosair Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, 570 South Preston Street, Suite 204, Louisville, KY 40202, USA. david.gozal@louisville.edu
Insights
Obstructive sleep apnea (OSA) in children causes inflammation, indicated by higher IL-6 and lower IL-10 levels. Treatment with tonsillectomy and adenoidectomy (T&A) reverses these inflammatory markers.
Area of Science:
- Pediatric sleep medicine
- Immunology
- Cardiovascular health
Background:
- Obstructive sleep apnea (OSA) is linked to systemic inflammation, increasing end-organ damage risk.
- The roles of IL-6 and IL-10 in OSA-related atherogenesis are not well-studied in children.
- Inflammatory cytokine changes in pediatric OSA require further investigation.
Purpose of the Study:
- To assess Interleukin-6 (IL-6) and Interleukin-10 (IL-10) levels in non-obese children with OSA.
- To determine if these inflammatory markers change after tonsillectomy and adenoidectomy (T&A).
Main Methods:
- Polysomnography diagnosed OSA in children aged 4-9 years.
- Plasma IL-6 and IL-10 levels were measured before and after T&A in OSA patients.
- Matched controls without OSA were used for comparison.
Main Results:
- Children with OSA exhibited elevated IL-6 and reduced IL-10 levels compared to controls.
- Post-T&A, IL-6 and IL-10 levels in OSA patients normalized to control levels.
- Inflammation associated with pediatric OSA is present even without obesity.
Conclusions:
- Systemic inflammation is a key feature of pediatric OSA, even in non-obese children.
- Inflammation in pediatric OSA is largely reversible following T&A.
- Treating OSA can mitigate associated inflammatory processes and potential long-term complications.
Background:
Obstructive sleep apnea (OSA) has been associated with increased systemic inflammatory responses that may contribute to an increased risk for end-organ morbidity. The changes in levels of pro-inflammatory cytokine IL-6 , and the anti-inflammatory cytokine IL-10, both of which play a major role in atherogenesis, a major consequence of OSA, have not specifically been assessed in pediatric patients.
Methods:
Consecutive non-obese children (aged 4-9years) who were polysomnographically diagnosed with OSA, and age-, gender-, ethnicity-, and BMI-matched control children underwent a blood draw the next morning after a sleep study and plasma samples were assayed for interleukins 6 (IL-6) and 10 (IL-10). These tests were repeated 4-6months after tonsillectomy and adenoidectomy (T&A) in children with OSA.
Results:
IL-6 levels were higher and IL-10 plasma levels were lower in children with OSA and returned to control levels after T&A.
Conclusions:
Systemic inflammation is a constitutive component and consequence of OSA in many children, even in the absence of obesity, and is reversible upon treatment in most patients.
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