Neurobiology of injury to the developing brain

Area of Science:

• Neuroscience
• Neonatal Research
• Developmental Biology

Background:

• Improved survival rates of premature newborns have led to an increase in very low birth weight infants.
• Preterm infants are more susceptible to brain injuries, particularly white matter injury (WMI), compared to full-term infants.
• The developing oligodendroglia in preterm infants are intrinsically vulnerable to excitotoxicity, oxidative stress, and inflammation, contributing to WMI pathogenesis.

Purpose of the Study:

• To highlight the increased risk and pathogenesis of white matter injury in preterm infants.
• To emphasize the role of activated microglia and astrogliosis in triggering WMI.
• To underscore the need for effective therapeutic strategies to prevent brain injury and preserve motor pathway integrity in preterm infants.

Main Methods:

• Review of current understanding of WMI in preterm infants.
• Discussion of the cellular and molecular mechanisms underlying WMI.
• Exploration of advanced neuroimaging techniques for assessing brain injury.

Main Results:

• Preterm infants exhibit a higher propensity for WMI due to factors like hypoxia, ischemia, infection, and inflammation.
• Oligodendroglia vulnerability and the involvement of microglia and astrogliosis are key to WMI development.
• Current treatments for WMI in preterm infants are lacking.

Conclusions:

• Brain injury in preterm infants significantly impacts neurodevelopment and can lead to lifelong disability, particularly affecting motor pathways.
• Advanced neuroimaging has improved the understanding of white and gray matter injury in this population.
• Further research into preclinical therapeutic strategies is crucial for preserving brain integrity and motor function in preterm infants.