Abstract
IT has recently been shown1,2 that stimulation of the intrinsic inhibitory nerves of the guinea-pig taenia coli can cause a transient increase in the membrane potential of the smooth muscle cells. The magnitude of the hyperpolarization was found to vary with the external potassium concentration in a way which suggested that the transmitter, almost certainly largely noradrenaline, acts by increasing the permeability of the membrane to potassium ions. According to another hypothesis3,4, adrenaline, and presumably noradrenaline, can hyperpolarize the membrane by stimulating electrogenic extrusion of sodium from the cells.
Similar content being viewed by others
References
Bennett, M. R., Burnstock, G., and Holman, M. E., J. Physiol., 169, 33, P (1963).
Burnstock, G., Campbell, G., Bennett, M., and Holman, M. E., Nature, 200, 581 (1963).
Burnstock, G., J. Physiol., 143, 183 (1958).
Bülbring, E., Physiol. Rev., 42, supp.5, 160 (1962).
Ahlquist, R. P., Amer. J. Physiol., 153, 586 (1948).
Durbin, R. P., and Jenkinson, D. H., J. Physiol., 157, 74 (1961).
Edman, K. A. P., and Schild, H. O., J. Physiol., 169, 404 (1963).
Axelsson, J., and Bülbring, E., J. Physiol., 156, 344 (1961).
Bueding, E., and Bülbring, E., in Proc. Second Intern. Pharmacol. Meeting, 6, edit. by Bülbring, E., 37 (Pergamon Press, Oxford, London, 1964).
Ahlquist, R. P., and Levy, B., J. Pharmacol., 127, 146 (1959).
Furchgott, R. F., in Adrenergic Mechanisms, edit. by Vane, J. R., 246 (Churchill, London, 1960).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
JENKINSON, D., MORTON, I. Effects of Noradrenaline and Isoprenaline on the Permeability of Depolarized Intestinal Smooth Muscle to Inorganic Ions. Nature 205, 505–506 (1965). https://doi.org/10.1038/205505a0
Published:
Issue Date:
DOI: https://doi.org/10.1038/205505a0
- Springer Nature Limited
This article is cited by
-
Potassium channels – multiplicity and challenges
British Journal of Pharmacology (2006)
-
Der Einflu� von adrenergen Pharmaka und von Val5-Hypertensin II-amid auf die mittels 86Rb gemessene Membranpermeabilit�t am isolierten Herzvorhof von Meerschweinchen
Naunyn-Schmiedebergs Archiv f�r Pharmakologie und Experimentelle Pathologie (1968)
-
Model of the Membrane of Smooth Muscle Cells of the Guinea-Pig Taenia Cole Muscle During Transmission from Inhibitory and Excitatory Nerves
Nature (1966)