Title: Quinidine blockage of K+ channels in the basolateral membrane of larval bullfrog skin
Authors: Van Driessche, Willy ×
Hillyard, S D #
Issue Date: Feb-1986
Series Title: Pflügers Archiv : European journal of physiology. vol:405 Suppl 1 pages:S77-82
Abstract: The skin of frog larvae (Rana catesbeiana) was used to study the characteristics of basolateral K+ channels with fluctuation analysis. K2SO4 and Na2SO4 Ringer's were used as mucosal and serosal solution, respectively. After addition of Nystatin (138 U/ml) the transepithelial conductance and short-circuit current (Isc) increased considerably. Most of Isc was carried by K+, moving from the mucosal to the serosal side. This current could be depressed by quinidine, added to both compartments or to mucosal side only. Fluctuation analysis showed that quinidine induced a Lorentzian component in the power density spectrum. Assuming pseudo-first order kinetics for the channel occlusion by quinidine the current through the open K+ channel and channel density were calculated: iK = 0.22 pA, M = 7.7 channels/microns2.
ISSN: 0031-6768
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Department of Cellular and Molecular Medicine - miscellaneous
× corresponding author
# (joint) last author

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