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Related Experiment Videos

Inflammatory pathogenesis of cortical polymicrogyria: an autopsy study

P Toti1, C De Felice, M L Palmeri

  • 1Institute of Pathology, University of Siena, Italy.

Pediatric Research
|September 4, 1998
PubMed
Summary

Fetal infection, specifically chorioamnionitis, can cause brain damage and developmental abnormalities like polymicrogyria. This study links infection to histological changes in fetal brain cortex development.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Pathology

Background:

  • Polymicrogyria is a cortical malformation often categorized with neuron migration disorders.
  • Recent theories suggest polymicrogyria can be acquired due to developmental brain injury.
  • This study investigates if fetal adnexal infections lead to brain defects and polymicrogyria.

Observation:

  • Thirty-two fetuses with ascending chorioamnionitis (15-26 weeks gestation) and 8 controls were examined.
  • Histological analysis revealed cortical architecture alterations in 78% of affected fetuses.
  • Observed changes included cortical ribbon undulation, premature folding, and neuronal loss.

Findings:

  • Ascending chorioamnionitis significantly impacts fetal brain cortex morphogenesis.

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  • Histological brain abnormalities were significantly more prevalent in fetuses with chorioamnionitis compared to controls (p=0.019).
  • These alterations suggest indirect injury mechanisms like hypoxia and free radical generation.

    • Implications:

    • Chorioamnionitis is identified as a significant risk factor for fetal brain developmental abnormalities.
    • The findings suggest a pathway from infection-induced damage to conditions like polymicrogyria in surviving infants.
    • This research highlights the vulnerability of the developing brain to intrauterine infections.