Fasting Plasma GLP-1 Is Associated With Overweight/Obesity and Cardiometabolic Risk Factors in Children and Adolescents

Sara E Stinson, Anna E Jonsson, Morten A V Lund, Christine Frithioff-Bøjsøe, Louise Aas Holm, Oluf Pedersen, Lars Ängquist, Thorkild I A Sørensen, Jens J Holst, Michael Christiansen, Jens-Christian Holm, Bolette Hartmann, Torben Hansen, Sara E Stinson, Anna E Jonsson, Morten A V Lund, Christine Frithioff-Bøjsøe, Louise Aas Holm, Oluf Pedersen, Lars Ängquist, Thorkild I A Sørensen, Jens J Holst, Michael Christiansen, Jens-Christian Holm, Bolette Hartmann, Torben Hansen

Abstract

Context: The importance of fasting glucagon-like peptide-1 (GLP-1) in altered metabolic outcomes has been questioned.

Objective: This work aimed to assess whether fasting GLP-1 differs in children and adolescents with overweight/obesity compared to a population-based reference, and whether concentrations predict cardiometabolic risk (CMR) factors.

Methods: Analyses were based on The Danish Childhood Obesity Data- and Biobank, a cross-sectional study including children and adolescents, aged 6 to 19 years, from an obesity clinic group (n = 1978) and from a population-based group (n = 2334). Fasting concentrations of plasma total GLP-1 and quantitative CMR factors were assessed. The effects of GLP-1 as a predictor of CMR risk outcomes were examined by multiple linear and logistic regression modeling.

Results: The obesity clinic group had higher fasting GLP-1 concentrations (median 3.3 pmol/L; interquartile range, 2.3-4.3 pmol/L) than the population-based group (2.8 pmol/L; interquartile range, 2.1-3.8 pmol/L; P < 2.2E-16). Body mass index SD score (SDS), waist circumference, and total body fat percentage were significant predictors of fasting GLP-1 concentrations in boys and girls. Fasting GLP-1 concentrations were positively associated with homeostasis model assessment of insulin resistance, fasting values of insulin, high-sensitivity C-reactive protein, C-peptide, triglycerides, alanine transaminase (ALT), glycated hemoglobin A1c, and SDS of diastolic and systolic blood pressure. A 1-SD increase in fasting GLP-1 was associated with an increased risk of insulin resistance (odds ratio [OR] 1.59), dyslipidemia (OR 1.16), increased ALT (OR 1.14), hyperglycemia (OR 1.12) and hypertension (OR 1.12).

Conclusion: Overweight/obesity in children and adolescents is associated with increased fasting plasma total GLP-1 concentrations, which was predictive of higher CMR factors.

Trial registration: ClinicalTrials.gov NCT00928473.

Keywords: GLP-1; adolescents; cardiometabolic risk factors; children; obesity.

© The Author(s) 2021. Published by Oxford University Press on behalf of the Endocrine Society.

Figures

Figure 1.
Figure 1.
Estimated regression β effects (95% CI) for associations of fasting plasma total glucagon-like peptide-1 (GLP-1) as a predictor of cardiometabolic risk (CMR) factors. The obesity clinic and population-based groups were pooled to estimate the effect sizes for CMR factors. The formula for linear regression in R: glm(CMR factor ~ fasting plasma total GLP-1 (SD units) + age + sex + BMI SDS). BMI SDS and BF% were not adjusted for BMI SDS. Bonferroni-Holm correction for multiple testing corresponds to P < .003. ALT, plasma alanine transaminase; BF%, body fat percentage; BMI SDS, body mass index SD score; serum C-peptide; CMR, cardiometabolic risk; DBP SDS, diastolic blood pressure; plasma glucose; HbA1c, whole blood glycated hemoglobin A1c; HDL-C, plasma high-density lipoprotein cholesterol; HOMA-IR, homeostasis model assessment of insulin resistance; hs-CRP, serum high-sensitivity C-reactive protein; serum insulin; LDL-C, plasma low-density lipoprotein cholesterol; SBP SDS, systolic blood pressure; TG, plasma triglycerides; WC, waist circumference.
Figure 2.
Figure 2.
Estimated odds ratios (OR; 95% CI) for associations of fasting plasma total Glucagon-like peptide-1 (GLP-1) as a predictor of cardiometabolic risk (CMR) features. The obesity clinic and population-based groups were pooled to estimate the effect sizes for CMR features. Formula for interaction logistic regression in R: glm(CMR feature (0/1) ~ fasting plasma total GLP-1 (SD units) + age + sex + body mass index SDS). Bonferroni-Holm correction for multiple testing corresponds to P < .01. ALT, alanine transaminase.

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