Modulation of voltage-gated K+ channels Kv1. 1 and Kv1. 4 by forskolin
K Matthias, G Seifert, S Reinhardt, C Steinhäuser - Neuropharmacology, 2002 - Elsevier
K Matthias, G Seifert, S Reinhardt, C Steinhäuser
Neuropharmacology, 2002•ElsevierForskolin (FSK) affects voltage-gated K+ (Kv) currents in different cell types, but it is not
known which of the various subunits form FSK-sensitive Kv channels. We compared the
effect of the compound at Kv1. 1 and Kv1. 4 channels ectopically expressed in HEK 293
cells. Low FSK concentrations induced a phosphorylation-dependent potentiation of Kv1. 1
currents. At higher concentrations, this effect was superimposed by a fast, cAMP-
independent channel block. Kv1. 4 currents were inhibited with lower potency by FSK but …
known which of the various subunits form FSK-sensitive Kv channels. We compared the
effect of the compound at Kv1. 1 and Kv1. 4 channels ectopically expressed in HEK 293
cells. Low FSK concentrations induced a phosphorylation-dependent potentiation of Kv1. 1
currents. At higher concentrations, this effect was superimposed by a fast, cAMP-
independent channel block. Kv1. 4 currents were inhibited with lower potency by FSK but …
Forskolin (FSK) affects voltage-gated K+ (Kv) currents in different cell types, but it is not known which of the various subunits form FSK-sensitive Kv channels. We compared the effect of the compound at Kv1.1 and Kv1.4 channels ectopically expressed in HEK 293 cells. Low FSK concentrations induced a phosphorylation-dependent potentiation of Kv1.1 currents. At higher concentrations, this effect was superimposed by a fast, cAMP-independent channel block. Kv1.4 currents were inhibited with lower potency by FSK but were not modified by phosphorylation. The variable effect of the compound might help to distinguish between Kv subunits expressed by native cells.
Elsevier