Journal
NEUROCHEMICAL RESEARCH
Volume 41, Issue 1-2, Pages 86-95Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s11064-015-1728-5
Keywords
Acetyl-L-carnitine; Triheptanoin; Epilepsy; Neurons; Astrocytes; Metabolism; Glucose
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Epilepsy is a severe neurological disorder characterized by altered electrical activity in the brain. Important pathophysiological mechanisms include disturbed metabolism and homeostasis of major excitatory and inhibitory neurotransmitters, glutamate and GABA. Current drug treatments are largely aimed at decreasing neuronal excitability and thereby preventing the occurrence of seizures. However, many patients are refractory to treatment and side effects are frequent. Temporal lobe epilepsy (TLE) is the most common type of drug-resistant epilepsy in adults. In rodents, the pilocarpine-status epilepticus model reflects the pathology and chronic spontaneous seizures of TLE and the pentylenetetrazole kindling model exhibits chronic induced limbic seizures. Accumulating evidence from studies on TLE points to alterations in astrocytes and neurons as key metabolic changes. The present review describes interventions which alleviate these disturbances in astrocyte-neuronal interactions by supporting mitochondrial metabolism. The compounds discussed are the endogenous transport molecule acetyl-l-carnitine and the triglyceride of heptanoate, triheptanoin. Both provide acetyl moieties for oxidation in the tricarboxylic acid cycle whereas heptanoate is also provides propionyl-CoA, which after carboxylation can produce succinyl-CoA, resulting in anaplerosis-the refilling of the tricarboxylic acid cycle.
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