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Serum leptin levels in type 1 diabetic and obese children: relation to insulin levels

B Kirel1, N Doğruel, U Korkmaz

  • 1Department of Pediatrics, Osmangazi University Faculty of Medicine, Eskişehir, Turkey. bkirel@ogu.edu.tr

Clinical Biochemistry
|November 14, 2000
PubMed

Insights

Serum leptin levels are lower in children with type 1 diabetes compared to healthy children. This may be linked to chronic insulin deficiency and metabolic control, suggesting complementary roles for leptin and insulin in weight regulation.

Area of Science:

  • Pediatric Endocrinology
  • Metabolic Disorders
  • Hormone Research

Background:

  • Leptin is a key hormone regulating energy balance and body weight.
  • Type 1 diabetes is characterized by insulin deficiency, impacting metabolic processes.
  • Obesity is associated with altered leptin levels and contributes to metabolic dysfunction.

Purpose of the Study:

  • To investigate and compare serum leptin levels in children with type 1 diabetes, obesity, and healthy controls.
  • To explore the relationship between leptin, insulin secretion (estimated by C-peptide), body mass index, and glycemic control in these pediatric groups.

Main Methods:

  • Serum leptin levels were measured in 35 children with type 1 diabetes, 32 obese children, and 35 healthy children.
  • C-peptide levels were assessed to estimate endogenous insulin secretion.
  • Statistical analyses were performed to compare groups and identify correlations and predictors of leptin levels.

Main Results:

  • Children with type 1 diabetes exhibited significantly lower serum leptin levels than healthy controls.
  • Obese children showed higher leptin and C-peptide levels compared to both diabetic and control groups.
  • Leptin levels positively correlated with body mass index and C-peptide, and inversely with glucose and HbA1c in the combined cohort. Glycemic control (HbA1c) and gender were independent predictors of leptin in diabetic children.

Conclusions:

  • Reduced serum leptin in type 1 diabetic children may stem from chronic insulin deficiency and suboptimal metabolic control.
  • Leptin and insulin appear to play complementary roles in maintaining stable body weight.
  • Findings highlight the complex interplay between leptin, insulin, and metabolic status in pediatric populations.
Abstract

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