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Plasma cholesterol levels and brain development in preterm newborns.

Daphne Kamino1, Vann Chau1, Colin Studholme2

  • 1Division of Neurology, Department of Paediatrics, Hospital for Sick Children, Toronto, ON, Canada.

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Early cholesterol synthesis in preterm infants impacts brain development. Higher levels correlate with altered white matter structure and motor score decreases, but improved cerebellar volume.

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Area of Science:

  • Neonatal Neurology
  • Developmental Neuroscience
  • Metabolic Research

Background:

  • Preterm birth poses risks to brain development.
  • Cholesterol plays a vital role in brain maturation.
  • The impact of early cholesterol levels on preterm brain development requires further investigation.

Purpose of the Study:

  • To investigate the association between postnatal plasma cholesterol and lathosterol levels and brain development in preterm newborns.
  • To determine the relationship between early lipid profiles and neurodevelopmental outcomes at 3 years of age.

Main Methods:

  • Sixty preterm infants (24-32 weeks gestational age) underwent MRI scans shortly after birth and at term-equivalent age.
  • Plasma cholesterol and lathosterol levels were measured within 7 days of MRI scans.
  • Neurodevelopment was assessed at 3 years using the Bayley Scales of Infant Development, Third Edition.

Main Results:

  • Early plasma lathosterol levels correlated with increased white matter microstructural abnormalities (diffusivity) and subcortical white matter volume.
  • Higher early plasma cholesterol levels were linked to increased cerebellar volume.
  • Elevated early plasma lathosterol levels were associated with a 2-point decrease in motor scores at 3 years.

Conclusions:

  • Increased early endogenous cholesterol synthesis in preterm infants is linked to adverse white matter development and poorer motor outcomes.
  • Higher early plasma cholesterol is associated with beneficial cerebellar volume development.
  • Understanding the interplay between cholesterol supply and synthesis is crucial for optimizing preterm brain development and outcomes.