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非洲爪蟾卵母细胞中表达的电压依赖性钾通道的递质调节。

Transmitter regulation of voltage-dependent K+ channels expressed in Xenopus oocytes.

作者信息

Kavanaugh M P, Christie M J, Osborne P B, Busch A E, Shen K Z, Wu Y N, Seeburg P H, Adelman J P, North R A

机构信息

Vollum Institute, Oregon Health Sciences University, Portland 97201.

出版信息

Biochem J. 1991 Aug 1;277 ( Pt 3)(Pt 3):899-902. doi: 10.1042/bj2770899.

Abstract

Voltage-dependent K+ channels (RBK1, RBK2 and RGK5) were co-expressed in Xenopus oocytes with 5-hydroxytryptamine (5-HT2) receptors. K+ currents measured 2-4 days later were inhibited by 5-HT (100 nM-10 microM, 20-30 s application) by up to 90%. The effect of 5-HT was mimicked by intracellular injection of Ins(1,4,5)P3. Increasing the Ca2+ concentration at the inner surface of excised membrane patches did not decrease the K+ current.

摘要

电压依赖性钾通道(RBK1、RBK2和RGK5)与5-羟色胺(5-HT2)受体在非洲爪蟾卵母细胞中共同表达。2 - 4天后测量的钾电流被5-羟色胺(100 nM - 10 microM,施加20 - 30秒)抑制高达90%。细胞内注射肌醇三磷酸(Ins(1,4,5)P3)可模拟5-羟色胺的作用。增加切除膜片内表面的钙离子浓度并不会降低钾电流。

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