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Literature DB >> 7376904

The effect of divalent and trivalent cations on the sodium permeability of myelinated nerve fibres of Xenopus laevis.

Abstract

The effect of external Ca, Mg, Sr, Ba and La concentration was studied in potential clamp experiments on single myelinated nerve fibres of the frog (Xenopus laevis). An increase in cationic concentration caused a positive shift of the Na permeability (PNa) curve along the potential axis, a decrease in max. PNa and a decrease in the slope of the PNa curve. The effectiveness of Mg, Sr and Ba was similar and about 0.6 compared to that of Ca, whereas La was about 80 times more effective than Ca.

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Year: 1980 PMID： 7376904 DOI： 10.1111/j.1748-1716.1980.tb06496.x

Source DB: PubMed Journal: Acta Physiol Scand ISSN： 0001-6772

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Cited

10 in total

1. Intra and extracellular surface charges near Ca2+ channels in neurons and neuroblastoma cells.

Authors: A Becchetti; A Arcangeli; M R Del Bene; M Olivotto; E Wanke
Journal: Biophys J Date: 1992-10 Impact factor: 4.033

2. Enhancement of lanthanum (III) on sodium currents in acutely isolated hippocampal CA1 neurons of rat.

Authors: Huizhi Du; Pin Yang
Journal: Neurochem Res Date: 2009-03-10 Impact factor: 3.996

3. Heterogeneity of external surface charges near sodium channels in the nodal membrane of frog nerve.

Authors: B Neumcke; R Stämpfli
Journal: Pflugers Arch Date: 1984-06 Impact factor: 3.657

4. Effects of gadolinium on ion channels in the myelinated axon of Xenopus laevis: four sites of action.

Authors: F Elinder; P Arhem
Journal: Biophys J Date: 1994-07 Impact factor: 4.033

5. A quantitative study of the action of Centruroides sculpturatus toxins III and IV on the Na currents of the node of Ranvier.

Authors: S L Hu; H Meves; N Rubly; D D Watt
Journal: Pflugers Arch Date: 1983-04 Impact factor: 3.657

The effect of divalent and trivalent cations on the sodium permeability of myelinated nerve fibres of Xenopus laevis.

1. Intra and extracellular surface charges near Ca2+ channels in neurons and neuroblastoma cells.

2. Enhancement of lanthanum (III) on sodium currents in acutely isolated hippocampal CA1 neurons of rat.

3. Heterogeneity of external surface charges near sodium channels in the nodal membrane of frog nerve.

4. Effects of gadolinium on ion channels in the myelinated axon of Xenopus laevis: four sites of action.

5. A quantitative study of the action of Centruroides sculpturatus toxins III and IV on the Na currents of the node of Ranvier.

6. Effect of various cations and anions on the action of tetrodotoxin and saxitoxin on frog myelinated nerve fibers.

7. Sodium current block caused by group IIb cations in calf Purkinje fibres and in guinea-pig ventricular myocytes.

8. Selective block of calcium current by lanthanum in single bullfrog atrial cells.

9. Slowing of sodium channel opening kinetics in squid axon by extracellular zinc.

10. Block of squid axon K channels by internally and externally applied barium ions.