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Updated: Mar 8, 2026
Early Pathological and Magnetic Resonance Detection of Cerebral Injury Using a Rat Model of Neonatal Hypoxic Ischemic Encephalopathy
Published on: October 28, 2022
25 years of research on global asphyxia in the immature rat brain
M Barkhuizen1, D L A van den Hove2, J S H Vles3
1Department of Pediatrics, Maastricht University Medical Center (MUMC), Maastricht, The Netherlands; Department of Translational Neuroscience, School for Mental Health and Neuroscience (MHeNs), Maastricht University, Maastricht, The Netherlands; DST/NWU Preclinical Drug Development Platform, North-West University, Potchefstroom, South Africa.
Insights
Hypoxic-ischemic encephalopathy (HIE) in preterm infants requires new therapies. A rodent model of perinatal asphyxia provides insights into brain damage and informs drug development for neonates.
Area of Science:
- Neonatal neurology
- Perinatal medicine
- Neuroscience
Background:
- Hypoxic-ischemic encephalopathy (HIE) is a major cause of neonatal brain damage.
- Preterm infants face increased HIE risk and lack specific treatments.
- Developing effective therapies necessitates reliable preclinical animal models.
Purpose of the Study:
- To review neuropathological and behavioral outcomes in a preterm rodent model of global asphyxia.
- To highlight the utility of this model for studying HIE in early preterm brains.
- To inform preclinical drug development for HIE in neonates.
Main Methods:
- Utilized a rodent model simulating perinatal asphyxia in preterm infants.
- Asphyxia induced by submerging uterine horns followed by C-section.
- Model aligns with human fetal brain development at 22-32 weeks gestation.
Main Results:
- The model has been established and refined over 25 years.
- Provides data on short- and long-term neuropathological effects.
- Offers insights into behavioral consequences of HIE in immature brains.
Conclusions:
- The rodent model is crucial for understanding HIE in preterm neonates.
- It serves as a valuable platform for preclinical therapeutic research.
- Further research using this model can advance HIE treatment strategies.
Abstract:
Hypoxic-ischemic encephalopathy remains a common cause of brain damage in neonates. Preterm infants have additional complications, as prematurity by itself increases the risk of encephalopathy. Currently, therapy for this subset of asphyxiated infants is limited to supportive care. There is an urgent need for therapies in preterm infants - and for representative animal models for preclinical drug development. In 1991, a novel rodent model of global asphyxia in the preterm infant was developed in Sweden. This method was based on the induction of asphyxia during the birth processes itself by submerging pups, still in the uterine horns, in a water bath followed by C-section. This insult occurs at a time-point when the rodent brain maturity resembles the brain of a 22-32 week old human fetus. This model has developed over the past 25 years as an established model of perinatal global asphyxia in the early preterm brain. Here we summarize the knowledge gained on the short- and long-term neuropathological and behavioral effects of asphyxia on the immature central nervous system.
