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Destruction and reconstruction: hypoxia and the developing brain

Robert D Barrett1, Laura Bennet, Joanne Davidson

  • 1Department of Physiology, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.

Birth Defects Research. Part C, Embryo Today : Reviews
|October 30, 2007
PubMed

Insights

Premature birth can cause neurodevelopmental issues in infants due to brain injury. This review explores how early brain damage and loss of progenitor cells impact long-term development and potential interventions.

Area of Science:

  • Neonatal neurology
  • Developmental neuroscience
  • Pediatric neuroimaging

Background:

  • Preterm infants face high rates of neurodevelopmental handicap.
  • Reduced brain growth and neural complexity are linked to adverse outcomes.
  • Acute in utero injuries like hypoxia-ischemia and inflammation cause chronic deficits.

Purpose of the Study:

  • To review evidence linking acute neuronal and glial injury to chronic neurodevelopmental impairment in preterm infants.
  • To examine the role of physiological apoptosis and progenitor cell loss in compromised brain development.
  • To discuss the complex impact of interventions like hypothermia and growth factors.

Main Methods:

  • Review of recent imaging studies and scientific literature.
  • Analysis of mechanisms underlying brain injury in preterm infants.
  • Examination of cellular and molecular pathways affecting neurodevelopment.

Main Results:

  • Chronic neurodevelopmental deficits stem from acute neuronal/glial injury during gestation.
  • Upregulation of apoptosis and axonal injury contribute to impaired brain development.
  • Injury to subventricular zone progenitor cells exacerbates developmental compromise.

Conclusions:

  • Acute in utero events significantly impact long-term brain development in preterm infants.
  • Loss of progenitor cells further hinders neurodevelopmental recovery.
  • Interventions require careful consideration due to complex effects on brain development.

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