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Neurobehavioral maturation of offspring from epileptic dams: study in the rat lithium-pilocarpine model
Emmanuel Raffo1, Anne Pereira de Vasconcelos, Any Boehrer
1INSERM U 398, Faculty of Medicine, Strasbourg, France.
Insights
Epilepsy in pregnant rats did not harm offspring neurobehavioral development. Pups born to epileptic mothers and raised by controls showed improved developmental scores, suggesting prenatal seizure exposure is not detrimental.
Area of Science:
- Neuroscience
- Developmental Biology
- Epilepsy Research
Background:
- Epilepsy can impact maternal health and potentially offspring development.
- Understanding the effects of maternal seizures on neurodevelopment is crucial for managing pregnancy in epileptic patients.
Purpose of the Study:
- To investigate the neurobehavioral development of offspring from rats with induced temporal lobe epilepsy.
- To determine if prenatal exposure to seizures affects offspring development, considering maternal care variations.
Main Methods:
- Utilized the lithium-pilocarpine model to induce temporal lobe epilepsy in female rats.
- Cross-fostered offspring to separate maternal care (epileptic vs. control dams).
- Assessed offspring neurobehavioral development from postnatal day 4 to 30 using various tests.
Main Results:
- Offspring born to or raised by epileptic dams exhibited normal neurobehavioral development compared to controls.
- Pups born from epileptic dams but raised by control dams showed enhanced performance in developmental tests.
- Prenatal seizure exposure did not negatively impact fetal neurobehavioral maturation.
Conclusions:
- Maternal epilepsy, induced by lithium-pilocarpine, does not adversely affect the neurobehavioral development of rat offspring.
- Prenatal exposure to seizures may have a beneficial effect on offspring neurodevelopment, warranting further investigation.
Abstract:
In the present study, we explored the consequences of epilepsy on the neurobehavioral development of the offspring in a rat model of spontaneous epilepsy, the lithium-pilocarpine model of temporal lobe epilepsy not dependent on genetic factors and in animals not receiving any antiepileptic treatment. Status epilepticus was induced by lithium-pilocarpine in female rats. After the occurrence of spontaneous seizures the rats were mated and the neurobehavioral development of the offspring was explored. Rat pups were cross-fostered early after birth. We hence obtained pups born from or raised by epileptic or non-epileptic dams. On the dams, we performed a follow-up of maternal care during pregnancy. On the pups, we performed a follow-up of classical parameters of development such as body weight and eyelid opening, and subjected the pups to various tests representative of neurobehavioral maturation extending from postnatal day 4 (PD4) to PD30 (righting reflex, suspension time, negative geotaxis, open field, locomotor coordination and eight arm maze). Altogether our data show that rat pups born from or raised by epileptic dams develop as well as control pups raised by control dams. Intriguingly, pups born from lithium-pilocarpine exposed dams and raised by control mothers tend to have better scores than the two other groups in all tests. This indicates that the exposure to seizures during pregnancy is not harmful for the development of the fetus.
