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Prevalence of structural central nervous system abnormalities in early-onset type 1 diabetes mellitus

Margaret S Ho1, Narelle J Weller, F Jay Ives

  • 1Telethon Institute for Child Health Research, Centre for Child Health Research, University of Western Australia, Perth, Australia.

The Journal of Pediatrics
|June 7, 2008
PubMed

Insights

Severe hypoglycemia in early-onset type 1 diabetes mellitus (T1DM) may impact brain development, potentially reducing gray matter volume. Early T1DM onset is linked to central nervous system abnormalities.

Area of Science:

  • Pediatric Neurology
  • Endocrinology
  • Neuroimaging

Background:

  • Type 1 diabetes mellitus (T1DM) onset in early childhood presents unique challenges for brain development.
  • Severe hypoglycemia, a complication of T1DM, raises concerns about potential neurodevelopmental effects.
  • Understanding the impact of T1DM and its complications on the pediatric brain is crucial for long-term outcomes.

Purpose of the Study:

  • To investigate the effects of severe hypoglycemia on the developing brain in children with early-onset T1DM.
  • To characterize central nervous system (CNS) structural abnormalities in this population.
  • To explore the relationship between severe hypoglycemia, diabetic ketoacidosis (DKA), and brain matter volumes.

Main Methods:

  • Magnetic resonance imaging (MRI) was used to compare children with early-onset T1DM and a history of severe hypoglycemia (n=32) with age-matched controls without such history (n=30).
  • Glycemic control (HbA1c), DKA episodes, and clinical variables were monitored.
  • Brain matter volumes and structural abnormalities, including mesial temporal sclerosis (MTS), were assessed.

Main Results:

  • A significant prevalence of CNS structural abnormalities (29%) and MTS (16%) was observed in children with early-onset T1DM, irrespective of hypoglycemia history.
  • Mean HbA1c and T1DM duration were similar between groups.
  • Children with a history of severe hypoglycemia showed reduced gray matter density compared to controls.

Conclusions:

  • Early-onset T1DM is associated with a high incidence of CNS abnormalities, particularly MTS, indicating potential hippocampal damage.
  • Severe hypoglycemia in early childhood with T1DM may negatively affect gray matter volume.
  • Further research is needed to fully elucidate the long-term neurodevelopmental consequences.
Abstract

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