Related Experiment Videos
[Periventricular leukomalacia. I. Histological and pathophysiological aspects]
S Marret1, V Zupan, P Gressens
1Service de médecine néonatale, CHU, Rouen, France.
Summary
Periventricular leukomalacia (PVL) involves brain lesions in premature infants, often linked to prenatal factors. Recent research highlights multifactorial causes including inflammation and hypoxia, impacting white matter development.
Area of Science:
- Neuroscience
- Developmental Biology
- Pathology
Context:
- Periventricular leukomalacia (PVL) affects premature infants, with lesions in the telencephalic white matter.
- PVL is diagnosed in 4-10% of infants born before 33 weeks gestation and surviving >3 days.
- Prenatal origins account for an estimated 33-50% of PVL cases.
Purpose:
- To revisit the pathophysiology of periventricular leukomalacia (PVL).
- To explore the multifactorial basis of PVL using advances in neuroepidemiology, developmental neurobiology, and imaging.
- To elucidate the mechanisms underlying PVL development and topography.
Summary:
- PVL pathogenesis involves calcium influx from glutamatergic overactivation, triggered by cytokines, infection, and inflammation.
- Deficits in neurotrophic factors also contribute to PVL development.
- Periventricular topography is associated with intracerebral vascular wall properties during angiogenesis and perfusion failure/hypoxia.
Impact:
- Provides a comprehensive understanding of PVL's complex etiology.
- Informs potential therapeutic strategies targeting inflammation, excitotoxicity, and neuroprotection.
- Enhances diagnostic and prognostic capabilities through advanced imaging and neurobiological insights.