Hyperpolarization- and Depolarization-activated Ca2+ Currents in Paramecium Trigger Behavioral Changes and cGMP Formation Independently

Hyperpolarization- and Depolarization-activated Ca2+ Currents in Paramecium Trigger Behavioral... Using 5% ethanol as a deciliating agent, 20 mm colchicine to prevent reciliation and 1 mm amiloride to affect ion fluxes in Paramecium we examined the compartmentation and function of Ca2+ fluxes employing the biosynthesis of cGMP and the stereotypic swimming behavior as indicators for Ca2+ entry. As a function of extracellular Ca2+ Paramecia responded to colchicine and amiloride with a short-lived ciliary augmentation (fast swimming) which indicated hyperpolarization, and formation of cGMP, i.e., the reported hyperpolarization-activated Ca2+ inward current in the somatic membrane is coupled to intracellular generation of cGMP. This is comparable to the coupling of the depolarization-activated, ciliary Ca2+ inward current and ciliary cGMP formation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The Journal of Membrane Biology Springer Journals

Hyperpolarization- and Depolarization-activated Ca2+ Currents in Paramecium Trigger Behavioral Changes and cGMP Formation Independently

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Publisher
Springer-Verlag
Copyright
Copyright © Inc. by 1997 Springer-Verlag New York
Subject
Life Sciences; Biochemistry, general; Human Physiology
ISSN
0022-2631
eISSN
1432-1424
D.O.I.
10.1007/s002329900205
Publisher site
See Article on Publisher Site

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