Intracellular Ca2+ dynamics of hippocampal interneurons following nicotinic acetylcholine receptor activation

Szilard I. Szabo, Tibor Zelles, Balazs Lendvai

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Ca2+ permeability of central nicotinic acetylcholine receptors (nAChRs), especially the α7 subunits, are exceptionally high and this important feature provide a special functional importance for these receptors at the system level. Although studies at the cellular level extensively characterized the molecular properties of Ca2+ influx following nAChR activation, much less is known about the time-related Ca2+ dynamics during nicotine administration in integration units of neurons. Such studies are of particular relevance to understanding in situ nonsynaptic actions of nicotine. Puff ejection of drugs produce a rapid drug delivery and elimination from the cell surface allowing the activation of extrasynaptic receptors within desensitization time-frame. In this report we provide evidence that rapid nicotine application is able to produce irregular Ca2+ transients in the dendrites of stratum radiatum interneurons in the hippocampal CA1 region. Potential components and mechanisms of nAChR-mediated Ca2+ influx are discussed in details to demonstrate the unique feature of activation of nAChRs involved in nonsynaptic function in interneurons as compared to other types of nicotinic activity.

Original languageEnglish
Pages (from-to)135-141
Number of pages7
JournalNeurochemistry international
Volume52
Issue number1
DOIs
Publication statusPublished - Jan 1 2008

Keywords

  • Action potential
  • Calcium
  • Imaging
  • Nicotinic
  • Two-photon

ASJC Scopus subject areas

  • Cellular and Molecular Neuroscience
  • Cell Biology

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