KDT epilepsy diagram
KDT ketogenic diet therapy epilepsy mechanism diagram antiseizure
Ketogenic Diet Therapy (KDT) mechanism of action in epilepsy - detailed educational medical diagram showing: high fat low carbohydrate diet leads to liver producing ketone bodies (beta-hydroxybutyrate, acetoacetate, acetone), ketones cross blood brain barrier, multiple antiseizure mechanisms including: enhanced GABA synthesis (inhibitory), reduced glutamate (excitatory), inhibition of voltage-gated sodium and calcium channels, activation of ATP-sensitive potassium channels (KATP), inhibition of mTOR pathway, reduced neuronal excitability, gut microbiome modulation, mitochondrial biogenesis and improved energy metabolism. Include arrows showing metabolic pathway from dietary fat to ketone bodies. Label all pathways clearly with boxes and connecting arrows. Professional medical textbook style diagram.
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KDT book Epilepsy diagram
ketogenic diet therapy epilepsy mechanism diagram GABA glutamate ketone bodies antiseizure flowchart
Ketogenic Diet Therapy (KDT) in Epilepsy
Textbook Diagram: Ketogenesis Pathway
- 2 Acetyl-CoA (from fat breakdown) → Acetoacetyl-CoA via thiolase
- → HMG-CoA via HMG-CoA synthase
- → Acetoacetate via HMG-CoA lyase
- Acetoacetate → Acetone (via acetoacetate decarboxylase) or D-β-Hydroxybutyrate (via D-β-hydroxybutyrate dehydrogenase)
How KDT Controls Seizures (from Bradley & Daroff's Neurology + Adams & Victor's)
| Mechanism | Effect |
|---|---|
| Ketosis | Ketone bodies serve as alternative brain fuel; acetone has direct anticonvulsant activity |
| ↑ GABA synthesis | β-hydroxybutyrate (BHB) inhibits HDAC1/2 → upregulates GAD1 → more GABA (inhibitory neurotransmitter) |
| ↓ Glutamate | BHB-induced SIRT4 inactivates glutamate dehydrogenase → preserves glutamate for GABA synthesis |
| ↑ GABA/Glutamate ratio | Net shift toward inhibition → reduced neuronal excitability |
| Reduced blood glucose | Less substrate for excitatory neuronal firing |
| Metabolic acidosis | Contributes to membrane stabilization |
| Caloric restriction | Reduces neuronal activity |
Key Clinical Points (Bradley & Daroff; Adams & Victor)
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Diet composition: 80-90% calories from fat; carbohydrates only 5-10 g/day; fat:protein+carb ratio 2:1 to 4:1
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Efficacy: ~38-50% of children get >50% seizure reduction; about 10-15% achieve seizure freedom
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Best candidates: Drug-refractory epilepsy; GLUT1 deficiency (first-line); pyruvate dehydrogenase deficiency; Dravet syndrome; Lennox-Gastaut; infantile spasms; myoclonic-atonic epilepsy
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Onset: Rapid - median 5 days to first improvement; 75% improve within 14 days
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Contraindications: Mitochondrial disorders, pyruvate carboxylase deficiency, β-oxidation defects
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Adverse effects: Nephrolithiasis (5-6%), hyperlipidemia, constipation, acidosis, poor growth
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Medical Physiology (Boron & Boulpaep), Fig. 58-12
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Bradley and Daroff's Neurology in Clinical Practice - Dietary Therapy section
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Adams and Victor's Principles of Neurology, 12th Ed - Ketogenic Diet section