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Ultrastructural changes in the mouse fetal neocortex following chronic maternal alcoholization
Morphologie Et Embryologie
|January 1, 1989
Summary
Maternal alcohol exposure during pregnancy causes ultrastructural damage in fetal and newborn mouse neocortex. These brain changes may underlie neurodevelopmental issues in alcohol-affected offspring.
Area of Science:
- Neuroscience
- Developmental Biology
- Toxicology
Background:
- Maternal alcohol consumption during pregnancy is a significant risk factor for adverse neurodevelopmental outcomes.
- Alcohol exposure can disrupt critical periods of fetal brain development, leading to structural and functional deficits.
Purpose of the Study:
- To investigate the ultrastructural effects of chronic maternal alcoholization on the developing neocortex of mouse fetuses and newborns.
- To identify specific cellular and subcellular changes induced by prenatal ethanol exposure.
Main Methods:
- Female mice (RAP strain) were administered a 20% ethanol solution for 30-50 days before mating and throughout gestation.
- Neocortex tissue from fetuses (16, 18, 20 days) and newborn pups (day 1) was examined using electron microscopy.
Main Results:
- Chronic maternal alcoholization resulted in mitochondrial swelling and cristae loss in both endothelial and neural cells.
- Enlarged intercellular spaces and vacuolation/degeneration of neuronal processes were observed in the neocortex.
- These persistent ultrastructural alterations were noted in fetal and newborn brains.
Conclusions:
- Prenatal and early postnatal ethanol exposure induces significant ultrastructural damage in the developing neocortex.
- These observed brain changes provide a potential cellular basis for neuro-psychical and behavioral symptoms associated with fetal alcohol spectrum disorders.
- The findings highlight the vulnerability of the developing brain to alcohol and suggest pathways for pathological changes.