Activation of multiple-conductance state chloride channels in spinal neurones by glycine and GABA

Owen Hamill, J. Bormann, B. Sakmann

Research output: Contribution to journalArticle

278 Citations (Scopus)

Abstract

In the mammalian central nervous system, glycine and γ-aminobutyric acid (GABA) bind to specific and distinct receptors1-4 and cause an increase in membrane conductance to Cl- (refs 5-7). Neurones in various regions of the nervous system show differential sensitivity to glycine and GABA2,3; thus GABA and glycine receptors are spatially distinct from one another. However, on the basis of desensitization experiments on spinal cord neurones, it was suggested that the receptors for glycine and GABA may share the same Cl- channel8. We now report that in small membrane patches, isolated from the soma of spinal neurones, both receptor channels display several (multiple) conductance states. Two of the states are common to both receptor channels. However, the most frequently observed 'main conductance states' of the GABA and glycine receptor channels are different. Both channels display the same anion selectivity. We propose that one class of multistate Cl-channel is coupled to either GABA or glycine receptors. The main conductance state adopted by this channel is determined by the receptor to which it is coupled.

Original languageEnglish (US)
Pages (from-to)805-808
Number of pages4
JournalNature
Volume305
Issue number5937
DOIs
StatePublished - 1983
Externally publishedYes

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Aminobutyrates
Chloride Channels
Glycine
Glycine Receptors
Neurons
Membranes
Carisoprodol
Nervous System
Anions
Spinal Cord
Central Nervous System

ASJC Scopus subject areas

  • General

Cite this

Activation of multiple-conductance state chloride channels in spinal neurones by glycine and GABA. / Hamill, Owen; Bormann, J.; Sakmann, B.

In: Nature, Vol. 305, No. 5937, 1983, p. 805-808.

Research output: Contribution to journalArticle

Hamill, Owen ; Bormann, J. ; Sakmann, B. / Activation of multiple-conductance state chloride channels in spinal neurones by glycine and GABA. In: Nature. 1983 ; Vol. 305, No. 5937. pp. 805-808.
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