Abstract
The voltage dependent Ca2+ inward current in single smooth muscle cells dispersed from the longitudinal muscle layer of the rabbit ileum and rabbit portal vein was recorded using the whole-cell voltage clamp technique. D600 added to the bathing solution inhibited the Ca2+ current, while the intracellular perfusion of this agent did not reduce the amplitude of this current. Thus, D600 probably acts from the outer surface of the membrane. The nature of the Ca2+ channel in smooth muscle cells seems to differ from that in cardiac muscle cells.
MeSH Terms
Animals
Calcium/metabolism
Cell Membrane/drug effects,metabolism
Gallopamil/pharmacology
Ileum/drug effects,metabolism
In Vitro Techniques
Ion Channels/drug effects,metabolism
Muscle, Smooth/drug effects,metabolism
Muscle, Smooth, Vascular/drug effects,metabolism
Portal Vein/drug effects,metabolism
Rabbits
Chemicals
Ion Channels
Gallopamil
Calcium
Authors & Affiliations
4 authors, click to expand affiliations / ORCID
Ohya Y
Terada K
Kitamura K
Kuriyama H
References (13)
13 references, click to expand
-
Improved patch-clamp techniques for high-resolution current recording from cells and cell-free membrane patches.
Pflugers Arch. 1981 Aug;391(2):85-100
PMID: 6270629
-
Design of a fast voltage clamp for biological membranes, using discontinuous feedback.
Rev Sci Instrum. 1974 May;45(5):656-61
PMID: 4826158
-
The voltage- and time-dependent effects of (-)-verapamil on the slow inward current in isolated cat ventricular myocardium.
J Pharmacol Exp Ther. 1978 Oct;207(1):49-55
PMID: 702350
-
Uptake of calcium antagonistic drugs into muscles as related to their lipid solubilities.
Biochem Pharmacol. 1984 Mar 1;33(5):821-6
PMID: 6608945
-
Multiple effects of calcium antagonists on plateau currents in cardiac Purkinje fibers.
J Gen Physiol. 1975 Aug;66(2):169-92
PMID: 1176946
-
Membrane currents recorded from a fragment of rabbit intestinal smooth muscle cell.
Am J Physiol. 1986 Sep;251(3 Pt 1):C335-46
PMID: 2428252
-
Modulation by intracellular ATP and cyclic AMP of the slow inward current in isolated single ventricular cells of the guinea-pig.
J Physiol. 1983 May;338:321-37
PMID: 6308246
-
Does the organic calcium channel blocker D600 act from inside or outside on the cardiac cell membrane?
Pflugers Arch. 1982 Jun;393(4):287-91
PMID: 6289248
-
Increase in the slow inward current by intracellularly applied nifedipine and nicardipine in single ventricular cells of the guinea-pig heart.
J Mol Cell Cardiol. 1984 Dec;16(12):1173-7
PMID: 6085351
-
Actions of calcium antagonists on calcium currents in Helix neurons. Specificity and potency.
Circ Res. 1983 Feb;52(2 Pt 2):I53-9
PMID: 6131753
-
Two Ca-dependent K-channels classified by the application of tetraethylammonium distribute to smooth muscle membranes of the rabbit portal vein.
Pflugers Arch. 1985 Oct;405(3):173-9
PMID: 2415914
-
Diltiazem-induced vasodilatation of smooth muscle cells of the canine basilar artery.
Br J Pharmacol. 1982 Mar;75(3):455-67
PMID: 7066600
-
Nicardipine actions on smooth muscle cells and neuromuscular transmission in the guinea-pig basilar artery.
J Pharmacol Exp Ther. 1983 May;225(2):447-55
PMID: 6302249