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Anomalous temperature dependence of the sodium conductance in rabbit nerve compared with frog nerve

Nature volume 279, pages 327–328 (1979)Cite this article

Abstract

THE sodium channel in excitable tissues is an integral component of the membrane, and is intimately associated with the surrounding lipid1. Thus, the electrophysiological parameters of the sodium channel might be expected to exhibit a characteristic dependence on temperature, reflecting the marked temperature sensitivity of the physical properties of most lipids. We report here voltage-clamp experiments which show that cooling a rabbit node below the region of about 6 °C does in fact sharply decrease the maximal sodium conductance, and markedly prolongs sodium inactivation. It thus seems that the lipid (or lipid–protein) environment of the sodium channel in the rabbit node undergoes a drastic change below 6 °C.

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Authors and Affiliations

  1. Department of Pharmacology, Yale University School of Medicine, New Haven, Connecticut, 06510

    S. Y. CHIU, H. E. MROSE & J. M. RITCHIE

Authors
  1. S. Y. CHIU
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  2. H. E. MROSE
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  3. J. M. RITCHIE
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CHIU, S., MROSE, H. & RITCHIE, J. Anomalous temperature dependence of the sodium conductance in rabbit nerve compared with frog nerve. Nature 279, 327–328 (1979). https://doi.org/10.1038/279327a0

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