Voltage-gated membrane currents in neurons involved in odor information processing in snail procerebrum

Z. Pirger, I. Battonyai, N. Krajcs, K. Elekes, T. Kiss

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The procerebrum (PC) of the snail brain is a critical region for odor discrimination and odor learning. The morphological organization and physiological function of the PC has been intensively investigated in several gastropod species; however, the presence and distribution of ion channels in bursting and non-bursting cells has not yet been described. Therefore, the aim of our study was to identify the different ion channels present in PC neurons. Based on whole cell patch-clamp and immunohistochemical experiments, we show that Na+-, Ca2+-, and K+-dependent voltage-gated channels are differentially localized and expressed in the cells of the PC. Different Na-channel subtypes are present in large (10-15 μm) and small (5-8 μm) diameter neurons, which are thought to correspond to the bursting and non-bursting cells, respectively. Here, we show that the bursting neurons possess fast sodium current (INaT) and NaV1.9-like channels and the non-bursting neurons possess slow sodium current (I NaT) and NaV1.8-like channels in addition to the L-type Ca-, KV4.3 (A-type K-channel) and KV2.1 channels. We suggest that the bursting and/or non-bursting character of the PC neurons is at least partly determined by the battery of ion-channels present and their cellular and subcellular compartmentalization.

Original languageEnglish
Pages (from-to)673-682
Number of pages10
JournalBrain Structure and Function
Volume219
Issue number2
DOIs
Publication statusPublished - Mar 2014

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Keywords

  • Ion currents
  • Olfaction
  • Procerebrum
  • Snail

ASJC Scopus subject areas

  • Anatomy
  • Neuroscience(all)
  • Histology

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