Differential blocking effects of a spider toxin on synaptic and glutamate responses in the afferent synapse of the acoustico-lateralis receptors of Plotosus

Takatoshi Nagai, Shosaku Obara, Nobufumi Kawai

Research output: Contribution to journalArticle

22 Citations (Scopus)


The hypothesis that glutamate is the afferent transmitter in the acoustico-lateralis receptors was examined in Plotosus electroreceptors. JSTX, a spider toxin known to specifically block glutamate receptors, irreversibly abolished afferent impulse discharges induced by iontophoretically applied glutamate, whereas those induced synaptically by focal stimulation of receptor cells were little affected. Such differential blocking effects by JSTX, complementary to other biochemical data, further provide pharmacological evidence against the glutamate hypothesis.

Original languageEnglish
Pages (from-to)183-187
Number of pages5
JournalBrain Research
Issue number1
Publication statusPublished - 1984 May 21



  • acoustico-lateralis receptor
  • afferent synapse
  • glutamate receptor
  • iontophoresis
  • neurotransmitter
  • spider toxin

ASJC Scopus subject areas

  • Neuroscience(all)
  • Molecular Biology
  • Clinical Neurology
  • Developmental Biology

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