Regulation of ciliary motility by membrane potential in Paramecium: A role for cyclic AMP
Identifieur interne : 00F114 ( Main/Merge ); précédent : 00F113; suivant : 00F115Regulation of ciliary motility by membrane potential in Paramecium: A role for cyclic AMP
Auteurs : Nancy M. Bonini [États-Unis] ; Michael C. Gustin [États-Unis] ; David L. Nelson [États-Unis]Source :
- Cell Motility and the Cytoskeleton [ 0886-1544 ] ; 1986.
English descriptors
- Teeft :
- Adenylate, Adenylate cyclase, Analog, Biol, Bonini, Brehm, Camp action, Camp level, Camp levels, Cation, Cell biol, Cell motil, Cells depolarized, Cholera toxin, Ciliary, Ciliary activity, Ciliary motility, Ciliary motion, Cilium, Continuous ciliary reversal, Control cells, Control solution, Culture dish, Cyclase, Cyclic, Cyclic nucleotide analogs, Cyclic nucleotides, Demembranated models, Depolarization, Depolarized, Depolarized cells, Depolarizing, Divalent cations, Eckert, Egta, Electrophysiological, Extracellular, Extracellular ibmx, Extracellular medium, Febs lett, Final concentration, First hypothesis, Gustin, Hyperpolarization, Hyperpolarized, Hyperpolarizing, Hyperpolarizing solutions, Ibmx, Intracellular, Kaneko, Kung, Machemer, Mechanical stimulation, Membrane, Membrane hyperpolarization, Mgatp, Motility, Mutant, Naitoh, Nakaoka, Nucleotide, Paramecium, Paramecium caudatum, Paramecium tetraurelia, Perchloric acid, Permeant, Phosphodiesterase, Phosphodiesterase inhibitors, Physiol, Reversal, Satow, Schultz, Separate cell incubations, Speed measurements, Speed response, Sperm, Time course, Transmembrane, Various concentrations.
Abstract
The membrane potential of Paramecium controls the frequency and direction of the ciliary beat, thus determining the cell's swimming behavior. Stimuli that hyperpolarize the membrane potential increase the ciliary beat frequency and therefore increase forward swimming speed. We have observed that (1) drugs that elevate intracellular cyclic AMP increased swimming speed 2–3‐fold, (2) hyperpolarizing the membrane potential by manipulation of extracellular cations (e.g., K+) induced both a transient increase in, and a higher sustained level of cyclic AMP compared to the control, and (3) the swimming speed of detergent‐permeabilized cells in MgATP was stimulated 2‐fold by the addition of cyclic AMP. Our results suggest that the membrane potential can regulate intracellular cAMP in Paramecium and that control of swimming speed by membrane potential may in part be mediated by cAMP.
Url:
DOI: 10.1002/cm.970060303
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ISTEX:760BF36BFA7221D8426D057D45749D339F8B49F6Le document en format XML
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<term>Adenylate cyclase</term>
<term>Analog</term>
<term>Biol</term>
<term>Bonini</term>
<term>Brehm</term>
<term>Camp action</term>
<term>Camp level</term>
<term>Camp levels</term>
<term>Cation</term>
<term>Cell biol</term>
<term>Cell motil</term>
<term>Cells depolarized</term>
<term>Cholera toxin</term>
<term>Ciliary</term>
<term>Ciliary activity</term>
<term>Ciliary motility</term>
<term>Ciliary motion</term>
<term>Cilium</term>
<term>Continuous ciliary reversal</term>
<term>Control cells</term>
<term>Control solution</term>
<term>Culture dish</term>
<term>Cyclase</term>
<term>Cyclic</term>
<term>Cyclic nucleotide analogs</term>
<term>Cyclic nucleotides</term>
<term>Demembranated models</term>
<term>Depolarization</term>
<term>Depolarized</term>
<term>Depolarized cells</term>
<term>Depolarizing</term>
<term>Divalent cations</term>
<term>Eckert</term>
<term>Egta</term>
<term>Electrophysiological</term>
<term>Extracellular</term>
<term>Extracellular ibmx</term>
<term>Extracellular medium</term>
<term>Febs lett</term>
<term>Final concentration</term>
<term>First hypothesis</term>
<term>Gustin</term>
<term>Hyperpolarization</term>
<term>Hyperpolarized</term>
<term>Hyperpolarizing</term>
<term>Hyperpolarizing solutions</term>
<term>Ibmx</term>
<term>Intracellular</term>
<term>Kaneko</term>
<term>Kung</term>
<term>Machemer</term>
<term>Mechanical stimulation</term>
<term>Membrane</term>
<term>Membrane hyperpolarization</term>
<term>Mgatp</term>
<term>Motility</term>
<term>Mutant</term>
<term>Naitoh</term>
<term>Nakaoka</term>
<term>Nucleotide</term>
<term>Paramecium</term>
<term>Paramecium caudatum</term>
<term>Paramecium tetraurelia</term>
<term>Perchloric acid</term>
<term>Permeant</term>
<term>Phosphodiesterase</term>
<term>Phosphodiesterase inhibitors</term>
<term>Physiol</term>
<term>Reversal</term>
<term>Satow</term>
<term>Schultz</term>
<term>Separate cell incubations</term>
<term>Speed measurements</term>
<term>Speed response</term>
<term>Sperm</term>
<term>Time course</term>
<term>Transmembrane</term>
<term>Various concentrations</term>
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<front><div type="abstract" xml:lang="en">The membrane potential of Paramecium controls the frequency and direction of the ciliary beat, thus determining the cell's swimming behavior. Stimuli that hyperpolarize the membrane potential increase the ciliary beat frequency and therefore increase forward swimming speed. We have observed that (1) drugs that elevate intracellular cyclic AMP increased swimming speed 2–3‐fold, (2) hyperpolarizing the membrane potential by manipulation of extracellular cations (e.g., K+) induced both a transient increase in, and a higher sustained level of cyclic AMP compared to the control, and (3) the swimming speed of detergent‐permeabilized cells in MgATP was stimulated 2‐fold by the addition of cyclic AMP. Our results suggest that the membrane potential can regulate intracellular cAMP in Paramecium and that control of swimming speed by membrane potential may in part be mediated by cAMP.</div>
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