Modulation of voltage-gated K+ channels Kv1.1 and Kv1.4 by forskolin

被引：13
|
作者：
Matthias, K
Seifert, G
Reinhardt, S
Steinhäuser, C
机构：
[1] Univ Bonn, D-53105 Bonn, Germany
[2] Univ Mainz, Inst Physiol Chem, D-55099 Mainz, Germany
来源：
NEUROPHARMACOLOGY | 2002年 / 43卷 / 03期
关键词：
patch-clamp; forskolin; Kv1.1; Kv1.4; cAMP-independent block; channel phosphorylation;
D O I：
10.1016/S0028-3908(02)00115-6
中图分类号：
Q189 [神经科学];
学科分类号：
071006 ;
摘要：
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. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：444 / 449
页数：6
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