Isoflurane and sevoflurane dose-dependently impair hippocampal long-term potentiation

Rainer Haseneder, Stephan Kratzer, Ludwig von Meyer, Matthias Eder, Eberhard Kochs, Gerhard Rammes

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

Isoflurane and sevoflurane are commonly used volatile anaesthetics. Although acting via similar cellular mechanisms, the effect of different volatile anaesthetics on synaptic plasticity might differ. In the present study, using acute murine brain slice preparations, we compared the effects of isoflurane and sevoflurane on synaptic transmission and synaptic plasticity (long-term potentiation, LTP) in the CA1 stratum radiatum of the hippocampus. Isoflurane and sevoflurane dose-dependently diminished excitatory postsynaptic field potentials. In the presence of isoflurane (sevoflurane) at concentrations of 0.19, 0.28 and 0.37 mM (0.11, 0.21 and 0.42 mM), which correspond to 0.7-, 1.0- and 1.4-fold (0.3-, 0.6- and 1.1-fold) minimum alveolar concentration (MAC), high frequency stimulation reliably induced LTP. When isoflurane (sevoflurane) was applied at concentrations of 0.56 and 0.74 mM (0.63 and 0.84 mM), which equal 2.1- and 2.7-fold (1.7- and 2.2-fold) MAC, LTP was blocked. Our results indicate, that both anaesthetics influence synaptic strength to a similar degree, with only high concentrations blocking hippocampal CA1 stratum radiatum long-term potentiation.

Original languageEnglish
Pages (from-to)47-51
Number of pages5
JournalEuropean Journal of Pharmacology
Volume623
Issue number1-3
DOIs
StatePublished - 25 Nov 2009
Externally publishedYes

Keywords

  • Hippocampus
  • Isoflurane
  • Long-term potentiation
  • Sevoflurane
  • Synaptic plasticity

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