Clinical Report: Impaired Integrity of Circulating Mitochondrial DNA in Pediatric Obesity

Overview

This study identifies oxidative DNA damage and impaired circulating mitochondrial DNA integrity in children with preclinical and clinical obesity.

Background

Childhood obesity is a significant public health issue, with rising prevalence rates globally. It is linked to increased risks of cardiometabolic disorders, which can begin early in life. Understanding the biological mechanisms, such as oxidative stress and mitochondrial dysfunction, is crucial for early identification and intervention in at-risk children.

Data Highlights

Key Findings

• Both preclinical and clinical obesity groups exhibited significantly higher levels of 8-OH-dG compared to controls (p < 0.0001).
• Reduced c-mtDNA integrity was observed in both obesity groups compared to controls.
• 8-OH-dG levels positively correlated with triglycerides, the triglyceride-to-HDL cholesterol ratio, and the triglyceride–glucose index.
• c-mtDNA integrity showed inverse correlations with lipid-related markers and a positive correlation with HDL-C levels.
• Waist circumference percentile was independently associated with both 8-OH-dG and c-mtDNA integrity after adjusting for lipid markers.
• Cytokine concentrations were elevated in both obesity groups compared to controls.

Clinical Implications

The findings indicate that measuring circulating mitochondrial DNA integrity and oxidative DNA damage may help identify children with obesity.

Conclusion

This study highlights the presence of oxidative stress and mitochondrial damage in children with obesity.

Related Resources & Content

1. Frontiers in Pediatrics, 2026 -- Reduced circulating mitochondrial DNA integrity and increased DNA oxidation in preclinical and clinical pediatric obesity: an observational study
2. Frontiers in Pediatrics — Ultrasound omental fat as a precocious marker of metabolic adiposity in children
3. The Journal of Clinical Endocrinology & Metabolism — Metabolomics: An Emerging Approach for Addressing Prevention, Diagnosis, and Management of Obesity
4. The Journal of Clinical Endocrinology & Metabolism — Exploring the Mitochondrial Connection: The Differential Impact of Obesity on Insulin Sensitivity in Black and White Women
5. The Journal of Clinical Endocrinology & Metabolism — Links Between Plasma and Fecal Metabolites and Body Mass Index Along with Body Fat Distribution in Pediatric Populations
6. Evaluation and Treatment for Child Obesity | Obesity | CDC
7. Once-Weekly Semaglutide in Adolescents with Obesity | New England Journal of Medicine
8. Frontiers | Reduced circulating mitochondrial DNA integrity and increased DNA oxidation in preclinical and clinical pediatric obesity: an observational study