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Anticonvulsant profile of a balanced ketogenic diet in acute mouse seizure models

Ramakrishna Samala1, Sarah Willis, Karin Borges

  • 1Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, 1300 Coulter, Amarillo, TX 79106, United States.

Epilepsy Research
|June 21, 2008
PubMed

Insights

The ketogenic diet (KD) showed anticonvulsant effects in adolescent mice, specifically the 6:1 ratio, which improved seizure thresholds in the 6-Hz model after chronic feeding.

Area of Science:

  • Neuroscience
  • Dietary Science
  • Pharmacology

Background:

  • The ketogenic diet (KD) is known for its anticonvulsant properties.
  • Previous studies lacked control for essential nutrients, potentially confounding results.
  • Investigating balanced KDs is crucial for understanding their true efficacy.

Purpose of the Study:

  • To evaluate the anticonvulsant effects of balanced ketogenic diets (KDs) in mouse seizure models.
  • To determine the impact of KD macronutrient ratios on seizure thresholds and biochemical markers.
  • To assess the role of plasma d-beta-hydroxybutyrate (d-BHB) and glucose levels in KD's effects.

Main Methods:

  • Mice were fed control, 4:1 KD, or 6:1 KD diets with matched vitamins, minerals, and antioxidants.
  • Seizure susceptibility was tested in four acute mouse models (6-Hz, fluorothyl, pentylenetetrazole, kainate).
  • Plasma d-beta-hydroxybutyrate (d-BHB) and glucose levels were measured.

Main Results:

  • Feeding 4:1 and 6:1 KDs induced ketosis (1.2-2.2mM d-BHB) without consistently altering glucose levels.
  • The 6:1 KD reproducibly increased seizure threshold (CC50) in the 6-Hz model after 14 days in adolescent mice.
  • Anticonvulsant effects correlated with higher plasma d-BHB levels but were limited to the 6-Hz model.

Conclusions:

  • The ketogenic diet's anticonvulsant effect is model-specific, primarily observed in the 6-Hz model.
  • Chronic administration of a 6:1 KD is required for efficacy in this model.
  • The anticonvulsant effect appears independent of glucose reduction and linked to ketosis (d-BHB).

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