Related Experiment Videos
Seizure-induced memory impairment is reduced by choline supplementation before or after status epilepticus
Gregory L Holmes1, Yili Yang, Zhao Liu
1Department of Neurology, Center for Research in Pediatric Epilepsy, Harvard Medical School, Children's Hospital, Hunnewell 2, 300 Longwood Avenue, Boston, MA 02115, USA. gregory.holmes@tch.harvard.edu
Insights
Choline supplementation before or after kainic acid-induced seizures improved memory in rats. This highlights choline
Area of Science:
- Neuroscience
- Nutritional Neuroscience
- Neuroprotection
Background:
- Status epilepticus can cause cognitive deficits.
- Choline is vital for brain function and memory.
- Previous studies suggest prenatal choline protects against pilocarpine-induced seizures.
Purpose of the Study:
- To investigate the effects of pre- and postnatal choline supplementation on memory deficits induced by kainic acid (KA) status epilepticus.
- To determine if choline supplementation can mitigate KA-induced cognitive impairment.
Main Methods:
- Pregnant rats received normal, choline-supplemented, or choline-deficient diets.
- Kainic acid (KA) was administered to induce status epilepticus at postnatal day 42 or 35.
- Visual-spatial memory was assessed using the Morris water maze.
- Hippocampal choline acetyltransferase activity was measured.
Main Results:
- Rats receiving choline supplementation (pre- or postnatal) performed significantly better in the Morris water maze compared to control or choline-deficient groups.
- Choline deficiency led to reduced hippocampal choline acetyltransferase activity.
- Postnatal choline supplementation also improved memory performance after KA-induced seizures.
Conclusions:
- Choline supplementation, administered either before or after kainic acid-induced status epilepticus, can protect against memory deficits.
- Dietary choline plays a crucial role in mitigating cognitive impairments following seizures.
Abstract:
Prenatal choline supplementation can protect rats against cognitive deficits induced by status epilepticus induced by the cholinergic agent pilocarpine [J. Neurosci. 20 (2000) 1]. In the present day, we have extended this novel finding by investigating the effects of pre- and postnatal choline supplementation in memory deficits associated with status epilepticus induced with kainic acid (KA). In the first experiment pregnant rats received a normal, choline-supplemented, or choline deficient diet starting on the 11th day of gestation and continuing until postnatal (P) 7. At P42, rats were given a convulsant dosage of KA. Two weeks following the KA-induced status epilepticus rats underwent testing of visual-spatial memory using the Morris water maze test. Rats receiving supplemental choline performed better in the water maze than the deficient and control groups. Moreover, the activity of hippocampal choline acetyltransferase was 18% lower in the choline deficient animals as compared with the other two groups. In the second experiment we administered KA to P35 rats that had been given a normal diet. Following the status epilepticus the rats were given a choline-supplemented or control diet for 4 weeks and then tested in the water maze. Rats receiving choline supplementation performed far better than rats receiving a regular diet. This study demonstrates that choline supplementation prior to or following KA-induced status epilepticus can protect rats from memory deficits induced by status epilepticus.