A novel anti-epileptic agent, perampanel, selectively inhibits AMPA receptor-mediated synaptic transmission in the hippocampus

Laura Ceolin, Zuner A Bortolotto, Neil Bannister, Graham L Collingridge, David Lodge, Arturas Volianskis

Research output: Contribution to journalArticle (Academic Journal)peer-review

69 Citations (Scopus)

Abstract

Perampanel is a non-competitive AMPA receptor antagonist that is under development as an anti-epileptic therapy. Although it is known to reduce calcium flux mediated by AMPA receptors in cultured cortical neurons, there are no studies of its selectivity in synaptic transmission in more intact systems. In the present study using hippocampal slices, perampanel (0.01-10 μM) has been tested on pharmacologically isolated synaptic responses mediated by AMPA, NMDA or kainate receptors. Perampanel reduced AMPA receptor-mediated excitatory postsynaptic field potentials (f-EPSPs) with an IC(50) of 0.23 μM and a full block at 3 μM. This compares with an IC(50) of 7.8 μM for GYKI52466 on these responses. By contrast, perampanel at 10 μM had no effect on responses mediated by NMDA or kainate receptors, which were completely blocked by 30 μM D-AP5 and 10 μM NBQX respectively. The concentrations of perampanel required to reduce AMPA receptor-mediated responses are not dissimilar to those in plasma following anti-convulsant doses and are consistent with AMPA receptor antagonism being its primary mode of action.

Translated title of the contributionA novel anti-epileptic agent, perampanel, selectively inhibits AMPA receptor-mediated synaptic transmission in the hippocampus
Original languageEnglish
Pages (from-to)517-22
Number of pages6
JournalNeurochemistry International
Volume61
Issue number4
DOIs
Publication statusPublished - Sep 2012

Keywords

  • Animals
  • Anticonvulsants
  • Hippocampus
  • Male
  • Pyridones
  • Rats
  • Rats, Wistar
  • Receptors, AMPA
  • Synaptic Transmission

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