Abstract
In recent years, extensive research has been directed towards the development of novel therapeutic targets in epilepsy. A number of studies have reported that glutamate plays an important role in seizure generation and spread. Glutamate is the predominant excitatory neurotransmitter in the brain, exerting its action through ionotropic and metabotropic receptors. Notably, a significant increase of extracellular glutamate release was observed in hippocampus during the ictal, postictal, and interictal period of patients with pharmacoresistant epilepsy undergoing surgery (During and Spencer, Lancet 341:1607–1610, 1993; Cavus et al., Epilepsia 49:1358–1366, 2008). These results indicate a strong association between increased glutamate and epileptiform activity. The chronic increase in extracellular glutamate release favors neuronal hyperexcitability and subsequent neuronal damage. Thus, the pharmacological blockade of glutamatergic signaling represents an attractive alternative for the control of seizures and neuroprotection. In particular, glutamate receptors are attractive targets for novel antiepileptic drugs because different studies have demonstrated that its agonists and antagonists reduce excessive excitatory responses providing neuroprotection and causing seizure suppression. We provide a brief description of the glutamate agonists and antagonists with potential effects on these receptors and the results obtained in both preclinical models of epilepsy and during clinical trials.
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We thank Heidy Higuera Hernández for her technical assistance.
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Cuéllar-Herrera, M., Santana-Gómez, C.E., Carmona-Cruz, F., Vázquez-Barrón, D., Velasco, F., Velasco, A.L. (2016). Glutamate Receptors as Targets for Novel Antiepileptic Drug Therapy. In: Talevi, A., Rocha, L. (eds) Antiepileptic Drug Discovery. Methods in Pharmacology and Toxicology. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-6355-3_6
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