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Science 16 February 1990:
Vol. 247. no. 4944, pp. 854 - 858
DOI: 10.1126/science.2154850
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Articles

Science, Vol 247, Issue 4944, 854-858
Copyright © 1990 by American Association for the Advancement of Science

articles

Functional properties of rat brain sodium channels expressed in a somatic cell line

T Scheuer, VJ Auld, S Boyd, J Offord, R Dunn, and WA Catterall

Department of Pharmacology, School of Medicine, University of Washington, Seattle 98195.

Transfection of Chinese hamster ovary cells with complementary DNA encoding the RIIA sodium channel alpha subunit from rat brain led to expression of functional sodium channels with the rapid, voltage-dependent activation and inactivation characteristic of sodium channels in brain neurons. The sodium currents mediated by these transfected channels were inhibited by tetrodotoxin, persistently activated by veratridine, and prolonged by Leiurus alpha-scorpion toxin, indicating that neurotoxin receptor sites 1 through 3 were present in functional form. The RIIA sodium channel alpha subunit cDNA alone is sufficient for stable expression of functional sodium channels with the expected kinetic and pharmacological properties in mammalian somatic cells.


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Functional modulation of brain sodium channels by protein kinase C phosphorylation.
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