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Updated: Oct 22, 2025
Early Pathological and Magnetic Resonance Detection of Cerebral Injury Using a Rat Model of Neonatal Hypoxic Ischemic Encephalopathy
Published on: October 28, 2022
The dimensions of white matter injury in preterm neonates
Mireille Guillot1, Steven P Miller2
1Department of Pediatrics (Neurology), University of Toronto and the Hospital for Sick Children, 555 University Avenue, Toronto, Ontario, Toronto M5G 1X8, Canada; Department of Pediatrics (Neonatology), Université Laval and Centre Hospitalier Universitaire de Québec, Québec, Canada.
Insights
White matter injury (WMI) in preterm neonates is common and linked to adverse neurodevelopmental outcomes. Understanding WMI
Area of Science:
- Neonatal neurology
- Neuroimaging
- Developmental neuroscience
Background:
- White matter injury (WMI) is a common brain injury in preterm neonates.
- WMI involves destructive and maturational anomalies, primarily caused by hypoxia-ischemia affecting oligodendrocyte precursor cells.
- Inflammation can potentiate WMI, often co-occurring with comorbidities like infections, NEC, and bronchopulmonary dysplasia.
Purpose of the Study:
- To review the pathophysiology and imaging diagnosis of WMI in preterm neonates.
- To explore the link between postnatal complications and WMI.
- To guide the interpretation of white matter anomalies for predicting neurodevelopmental outcomes.
Main Methods:
- This is a review article, synthesizing existing literature.
- Focuses on the mechanisms of WMI, including hypoxia-ischemia and inflammation.
- Discusses neuroimaging techniques for diagnosing and characterizing WMI.
Main Results:
- Hypoxia-ischemia is the primary cause of WMI, impacting oligodendrocyte precursor cells.
- Inflammation acts as a potentiator, frequently associated with neonatal comorbidities.
- Detailed imaging characterization of WMI aids in predicting neurodevelopmental outcomes.
Conclusions:
- WMI is a significant predictor of adverse neurodevelopmental outcomes in preterm infants.
- Accurate diagnosis and characterization of WMI through imaging are crucial.
- Understanding the interplay of hypoxia-ischemia, inflammation, and comorbidities is key to managing WMI.
Abstract:
White matter injury (WMI) represents a frequent form of parenchymal brain injury in preterm neonates. Several dimensions of WMI are recognized, with distinct neuropathologic features involving a combination of destructive and maturational anomalies. Hypoxia-ischemia is the main mechanism leading to WMI and adverse white matter development, which result from injury to the oligodendrocyte precursor cells. Inflammation might act as a potentiator for WMI. A combination of hypoxia-ischemia and inflammation is frequent in several neonatal comorbidities such as postnatal infections, NEC and bronchopulmonary dysplasia, all known contributors to WMI. White matter injury is an important predictor of adverse neurodevelopmental outcomes. When WMI is detected on neonatal brain imaging, a detailed characterization of the injury (pattern of injury, severity and location) may enhance the ability to predict outcomes. This clinically-oriented review will provide an overview of the pathophysiology and imaging diagnosis of the multiple dimensions of WMI, will explore the association between postnatal complications and WMI, and will provide guidance on the signification of white matter anomalies for motor and cognitive development.
