Periventricular leucomalacia: a review

Area of Science:

• Neonatal neurology
• Neuroscience
• Developmental biology

Background:

• Periventricular leucomalacia (PVL) causes lifelong disability and economic burden in premature infants (<32 weeks gestation).
• PVL involves damage to the poorly vascularized white matter and sensitive oligodendrocyte progenitors (pre-oligodendrocytes).
• Recent imaging reveals diffuse and focal white matter injury components, leading to atrophy, ventriculomegaly, or cystic lesions.

Purpose of the Study:

• To elucidate the underlying causes of periventricular leucomalacia.
• To understand the mechanisms of white matter damage in premature infants.
• To explore potential therapeutic targets for preventing PVL-related disability.

Main Methods:

• Review of historical and recent findings on PVL.
• Analysis of imaging techniques for identifying white matter damage.
• Investigation into the pathophysiology of ischemia reperfusion injury and free radical pathways.

Main Results:

• PVL is characterized as an ischemia reperfusion injury of white matter.
• Free radicals are identified as the final pathway leading to pre-oligodendrocyte destruction and impaired myelination.
• Hypotension, hypocarbia, and infection are identified as contributory factors.

Conclusions:

• New imaging and electroencephalogram (EEG) techniques can improve disability prediction in vulnerable infants.
• Further research is crucial for blocking pre-oligodendrocyte destruction pathways.
• Investigating the safe use of free radical scavengers is essential for therapeutic development.