Microstructural white matter changes in infants with transient neonatal hypoglycemia revealed by diffusion tensor...

Area of Science:

• Neonatal neurology
• Pediatric neuroimaging
• Metabolic disorders

Background:

• Neonatal hypoglycemia (NH) is a common condition associated with neurodevelopmental issues and brain injury.
• Microstructural white matter changes in infants with transient NH are not well understood.
• This study investigates white matter integrity in infants with transient NH using diffusion tensor imaging (DTI).

Purpose of the Study:

• To determine if transient NH causes microstructural white matter injury in infants.
• To explore the relationship between blood glucose fluctuations and white matter alterations.
• To identify potential biomarkers for early detection of brain changes in NH.

Main Methods:

• Retrospective cohort study of 20 infants with transient NH and 22 controls.
• All infants underwent 3-Tesla DTI within the first 48 hours of life.
• Fractional anisotropy (FA) values in regions of interest were compared, and correlations with clinical data were analyzed.

Main Results:

• Infants with transient NH showed significantly lower FA values in the splenium of the corpus callosum (sCC) compared to controls (P=0.03).
• A positive correlation was found between the lowest blood glucose (LBG) levels and sCC FA values across the cohort (P=0.013, r=0.408), even after adjusting for confounders.
• These findings suggest sCC is vulnerable to hypoglycemic injury.

Conclusions:

• FA values are sensitive to microstructural white matter alterations in infants with NH.
• The splenium of the corpus callosum (sCC) may be particularly vulnerable to hypoglycemic injury.
• The severity of white matter alteration correlates with the severity of hypoglycemia, indicated by LBG levels.