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Preterm Brain Injury: Mechanisms and Challenges

Michael J Beacom1, Alistair J Gunn1, Laura Bennet1

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

Annual Review of Physiology
|November 12, 2024
PubMed

Insights

Preterm brain injury poses risks for neurodevelopmental disability. Research explores fetal response to hypoxia-ischemia, identifying circadian heart rate variability as a potential biomarker for early injury detection and treatment.

Area of Science:

  • Neuroscience
  • Developmental Biology
  • Perinatal Medicine

Background:

  • Preterm fetuses and newborns face significant risks of neural injury and impaired maturation, leading to neurodevelopmental disabilities.
  • Preterm brain injury is complex, occurring anytime during gestation or postnatally, often involving multiple pathogenic factors, making treatment challenging.

Purpose of the Study:

  • To review research on preterm fetal responses to hypoxia-ischemia and the evolution of brain injury.
  • To identify therapeutic opportunities and understand injury mechanisms during critical developmental phases.
  • To explore noninvasive methods for early detection of fetal brain injury.

Main Methods:

  • Review of existing research on fetal response to hypoxia-ischemia.
  • Analysis of injury evolution in the preterm brain.
  • Investigation of potential biomarkers for injury detection.

Main Results:

  • Preterm fetuses can survive hypoxia-ischemia with ongoing in utero brain injury and development.
  • Early detection of fetal brain injury is crucial for initiating treatments to mitigate adverse neurodevelopmental outcomes.
  • Circadian changes in fetal heart rate variability show promise as a biomarker for detecting injury and its phases.

Conclusions:

  • Understanding the dynamics of preterm brain injury following hypoxia-ischemia is key to developing effective interventions.
  • Noninvasive detection of fetal brain injury, potentially through heart rate variability, could enable timely treatment.
  • Targeting specific injury phases may improve outcomes and reduce the incidence of conditions like cerebral palsy.

Keywords:
biomarkerscircadianfetushypoxia-ischemianeuroprotectionpreterm

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