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Updated: Jan 19, 2026
Author Spotlight: Enhancing the Offspring Health in Rats with Maternal Exercise During Pregnancy
Published on: April 5, 2024
Physical exercise during pregnancy minimizes PTZ-induced behavioral manifestations in prenatally stressed offspring
Glauber Menezes Lopim1, Robson Campos Gutierre1, Eduardo Alves da Silva1
1Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo, Brazil.
Insights
Prenatal stress increases seizure susceptibility in offspring. However, maternal physical exercise during pregnancy can significantly reduce seizure severity and increase seizure latency in pups exposed to prenatal stress.
Area of Science:
- Neuroscience
- Developmental Biology
- Behavioral Science
Background:
- Prenatal stress negatively impacts offspring seizure susceptibility.
- Maternal physical exercise benefits offspring brain development.
- Minimizing prenatal stress effects on offspring seizures requires further investigation.
Purpose of the Study:
- To investigate if maternal physical exercise during pregnancy mitigates seizure susceptibility in offspring exposed to prenatal stress.
- To evaluate the effects of forced and voluntary exercise on seizure manifestation in offspring of stressed mothers.
Main Methods:
- Pregnant rats were divided into control, stress, stress/forced exercise, and stress/voluntary exercise groups.
- Offspring were tested for seizure behavior using pentylenetetrazol (PTZ) at postnatal days 15 and 25.
- Behavioral manifestations and seizure severity were analyzed.
Main Results:
- Prenatal stress significantly increased seizure susceptibility and severity in offspring compared to controls.
- Offspring of mothers who exercised during pregnancy showed increased latency to first seizure manifestation.
- Both forced and voluntary maternal exercise during gestation attenuated the negative effects of prenatal stress on PTZ-induced seizures.
Conclusions:
- Maternal physical exercise during pregnancy is a viable strategy to minimize the detrimental effects of prenatal stress on offspring seizure susceptibility.
- Both forced and voluntary exercise paradigms demonstrated protective effects.
- These findings highlight the importance of maternal lifestyle interventions during pregnancy for offspring neurological health.
Abstract:
Stress during gestation has been shown to affect susceptibility and intensity of seizures in offspring. Environmental stimuli, such as maternal physical exercise, have shown to be beneficial for brain development. Although studies have demonstrated the deleterious influence of stress during pregnancy on seizure manifestation in offspring, very little is known on how to minimize these effects. This study verified whether physical exercise during the pregnancy associated with prenatal stress minimizes seizure susceptibility in offspring at the beginning of postnatal development. Pregnant rats and male pups were divided into the following groups: control, stress, stress/forced exercise, and stress/voluntary exercise. Behavioral manifestations were analyzed after injection of pentylenetetrazol (PTZ; 45 and 60 mg/kg) at ages P15 and P25. Increased behavioral manifestations and seizure severity was observed in the stress group compared with the control group at both ages. At the dose of 45 mg/kg, offspring of stressed mothers who performed both physical exercise models showed an increase in latency for the first manifestation and decrease in the seizures severity at both ages compared with the mothers groups who were only stressed. Prenatal restraint stress potentiated PTZ-induced seizure behavior, and both forced and voluntary exercise during gestation attenuates the negative effects of PTZ-induced offspring.
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