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BRATISLAVA, Slovakia – A groundbreaking study conducted by a team of European researchers has revealed compelling evidence that maternal infections during pregnancy can have long-lasting effects on the brain function of offspring. The findings, published in the peer-reviewed journal Brain Medicine on Tuesday, suggest potential links to neurodevelopmental and psychiatric disorders such as autism, schizophrenia, and depression.
Researchers from the Slovak Academy of Sciences in Slovakia focused their investigation on the impact of maternal immune activation (MIA) on hippocampal pyramidal neurons in newborn rat offspring. The hippocampus, a vital brain region involved in memory, emotion, and cognition, was found to be significantly affected by prenatal inflammation.
“Maternal infections are a known risk factor for conditions like autism, schizophrenia, and depression,” said Dr. Eliyahu Dremencov from the institute. “Our research shows that early-life alterations in hippocampal neuron function could be a key mechanism linking prenatal inflammation to these disorders.”
During pregnancy, infections trigger an immune response that releases cytokines, chemical messengers that can cross the placenta and influence fetal brain development. The researchers used a well-established animal model, inducing MIA in pregnant rats with lipopolysaccharide (LPS), a bacterial component that stimulates the immune system. They then assessed the hippocampal neurons of newborn offspring to determine how prenatal immune activation affected their excitability.
“We observed that neurons from MIA-exposed offspring had a significantly higher threshold for activation, slower response times, and reduced firing rates,” explained lead author Dr. Lucia Moravcikova. “This suggests a disruption in glutamatergic neurotransmission, which plays a critical role in learning, memory, and emotional regulation.”
The study revealed major changes in hippocampal neuron function in newborns exposed to MIA, including:
- Impaired excitability: Neurons required a stronger stimulus to activate.
- Slower response times: Neurons took longer to respond to stimulation, affecting signal transmission.
- Reduced firing rates: The neurons fired less frequently.
Notably, male offspring exhibited a greater reduction in spontaneous neuronal activity, potentially explaining the higher prevalence of conditions like autism and schizophrenia in males.
These findings highlight the critical importance of maternal health during pregnancy and suggest potential avenues for future research into preventing and mitigating the impact of maternal infections on offspring brain development.
Disclaimer: This article is based on a study conducted on rats and the results may not be directly applicable to humans. Further research is needed to fully understand the implications of maternal infections on human brain development. This information should not be used as a substitute for professional medical advice. Always consult with a healthcare provider for any questions you may have regarding a medical condition.
