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Updated: May 30, 2026
Modifying Levels of Maternal Dietary Folic Acid or Choline to Study the Impact of Deficiencies on Offspring Health Outcomes
Published on: June 28, 2024
Prenatal choline deficiency does not enhance hippocampal vulnerability after kainic acid-induced seizures in
Sarah J E Wong-Goodrich1, Christina M Tognoni, Tiffany J Mellott
1Unit on Neuroplasticity, National Institute of Mental Health, National Institutes of Health, Bethesda, MD 20892, USA.
Insights
Prenatal choline deficiency in rats did not increase seizure susceptibility or hippocampal damage. This suggests that choline deficiency during pregnancy does not worsen neuropathological responses to excitotoxic injury in adult offspring.
Area of Science:
- Neuroscience
- Developmental Biology
- Nutritional Science
Background:
- Choline is essential for early development, with deficiency during pregnancy causing birth defects or cognitive deficits in offspring.
- Prenatal choline supplementation offers neuroprotection and aids memory.
- It is hypothesized that prenatal choline deficiency may increase vulnerability to neural injury.
Purpose of the Study:
- To investigate whether prenatal choline deficiency enhances susceptibility to seizure-induced neuropathology in adult rat offspring.
Main Methods:
- Adult offspring from dams fed control or choline-deficient diets during gestation were subjected to kainic acid-induced seizures.
- Histopathology, gene expression (GAD, GFAP), and cell proliferation were assessed 16 days post-seizure.
Main Results:
- Choline-deficient offspring did not show increased seizure susceptibility or hippocampal histopathology compared to controls.
- No significant differences were observed in GAD expression loss, GFAP and growth factor upregulation, or dentate cell/neuronal proliferation.
Conclusions:
- Prenatal choline deficiency compromises adult hippocampal plasticity but does not exacerbate neuropathological responses to excitotoxic injury shortly after seizures.
Abstract:
Choline is a vital nutrient needed during early development for both humans and rodents. Severe dietary choline deficiency during pregnancy leads to birth defects, while more limited deficiency during mid- to late pregnancy causes deficits in hippocampal plasticity in adult rodent offspring that are accompanied by cognitive deficits only when task demands are high. Because prenatal choline supplementation confers neuroprotection of the adult hippocampus against a variety of neural insults and aids memory, we hypothesized that prenatal choline deficiency may enhance vulnerability to neural injury. To examine this, adult offspring of rat dams either fed a control diet (CON) or one deficient in choline (DEF) during embryonic days 12-17 were given multiple injections (i.p.) of saline (control) or kainic acid to induce seizures and were euthanized 16 days later. Perhaps somewhat surprisingly, DEF rats were not more susceptible to seizure induction and showed similar levels of seizure-induced hippocampal histopathology, GAD expression loss, upregulated hippocampal GFAP and growth factor expression, and increased dentate cell and neuronal proliferation as that seen in CON rats. Although prenatal choline deficiency compromises adult hippocampal plasticity in the intact brain, it does not appear to exacerbate the neuropathological response to seizures in the adult hippocampus at least shortly after excitotoxic injury.
