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Glucose and leucine kinetics in idiopathic ketotic hypoglycaemia

O A Bodamer1, K Hussein, A A Morris

  • 1Biochemical Genetics and National Neonatal Screening Laboratories, University Children's Hospital Vienna, Vienna, Austria. olaf.bodamer@meduniwien.ac.at

Archives of Disease in Childhood
|January 31, 2006
PubMed

Insights

Ketotic hypoglycemia (KH) in children stems from impaired hepatic glucose production, not increased glucose use. Children with KH have higher energy needs but reduced leucine oxidation.

Area of Science:

  • Pediatric Endocrinology
  • Metabolic Disorders
  • Nutritional Science

Background:

  • Ketotic hypoglycemia (KH) is a common cause of hypoglycemia in young children.
  • The underlying pathophysiology of KH requires further elucidation.
  • Understanding metabolic and endocrine factors is crucial for managing KH.

Purpose of the Study:

  • To investigate glucose and leucine kinetics in children with ketotic hypoglycemia (KH).
  • To associate these kinetics with metabolic and endocrine profiles.
  • To elucidate the pathophysiology of KH.

Main Methods:

  • Prospective interventional study involving nine children with KH and 11 controls.
  • Utilized stable isotope tracer techniques.
  • Measured plasma insulin, ketone bodies, basal metabolic rate, respiratory quotients, leucine oxidation, and hepatic glucose production.

Main Results:

  • Children with KH exhibited lower plasma insulin and higher ketone bodies.
  • Basal metabolic rate was significantly higher in KH subjects.
  • Leucine oxidation and hepatic glucose production rates were significantly lower in children with KH.

Conclusions:

  • KH results from a failure to maintain hepatic glucose production.
  • Increased energy demand and reduced leucine oxidation characterize KH.
  • The findings provide insights into the metabolic dysregulation in ketotic hypoglycemia.
Abstract

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