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Relation of leptin to insulin resistance syndrome in children

Julia Steinberger1, Lyn Steffen, David R Jacobs

  • 1Department of Pediatrics, University of Minnesota Medical School, University of Minnesota School of Public Health, Minneapolis, Minnesota 55455, USA. stein055@unm.edu

Obesity Research
|September 16, 2003
PubMed

Insights

Leptin levels are linked to insulin resistance in children, especially in heavier ones. These connections, though reduced by body fat, may impact long-term cardiovascular health.

Area of Science:

  • Pediatric Endocrinology
  • Metabolic Syndrome Research
  • Obesity and Cardiovascular Health

Background:

  • Leptin, a hormone produced by adipose tissue, plays a crucial role in regulating appetite and energy balance.
  • Insulin resistance is a key metabolic abnormality associated with obesity and an increased risk of cardiovascular disease.
  • Understanding the relationship between leptin and insulin resistance in children is vital for early intervention and prevention strategies.

Purpose of the Study:

  • To investigate the association between leptin levels and insulin resistance, as measured by euglycemic insulin clamp.
  • To examine the relationship between leptin and other factors of the insulin resistance syndrome in both lean and overweight children.
  • To explore potential differences in these relationships based on gender and pubertal status.

Main Methods:

  • A cohort of 342 children aged 11-14 years (272 white, 70 black) underwent measurements of anthropometrics, insulin, blood pressure, and leptin.
  • Insulin sensitivity was assessed using the euglycemic insulin clamp technique, with results expressed as M/lean body mass (Mlbm).
  • Children were categorized into 'thin' and 'heavy' groups based on the median body mass index (BMI) for their gender.

Main Results:

  • Leptin levels showed a strong positive correlation with BMI in both boys and girls.
  • Leptin was significantly higher in girls than boys and exhibited distinct changes during puberty, mirroring body fat variations.
  • Leptin correlated with insulin, Mlbm, triglycerides, and blood pressure in heavy children, and with insulin in thin children; these associations persisted for insulin and Mlbm in heavy children and insulin in thin children after adjusting for body fat.

Conclusions:

  • Leptin is significantly associated with insulin resistance in children, although this relationship is partially explained by adiposity.
  • These early-life associations suggest potential long-term implications for the development of obesity-related cardiovascular risk profiles.
  • The findings highlight the importance of monitoring leptin and insulin sensitivity in pediatric populations to identify individuals at risk for metabolic complications.
Abstract

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