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ω-conotoxins and calcium channels. Teruo ABE 1 1Department of Neurochemistry, Brain Research Institute, Niigata University pp.524-530
Published Date 1991/8/10
DOI https://doi.org/10.11477/mf.1431900153
  • Abstract
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Studies of voltage-sensitive calcium channels with a specific toxin, ω-conotoxin GVIA are briefly reviewed. The toxin blocks transmitter release at some but not all peripheral and central synapses. It was initially reported that the toxin inhibits both L-(dihydropyridine-sensitive) as well as N-types of calcium channels in the nervous system. However, very recent studies suggest that ω-conotoxin irreveisibly inhibits high-threshold neuronal calcium channels that are insensitive to dihydropyridines. Biochemical studies using radiolabeled toxin also suggest that the receptor for the toxin (constituent of calcium channels) is different from the dihydropyridine receptor in mammalian brain. Thus the toxin will be useful as a probe for investigations of calcium channel molecules involved in transmitter release.


Copyright © 1991, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1243 印刷版ISSN 0001-8724 医学書院

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