Activation of inwardly rectifying K+ channels by GABA-B receptors expressed in Xenopus oocytes.

Abstract:

:In Xenopus oocytes coinjected with poly(A)+ RNA derived from the rat cerebellum and cRNAs for the cloned G protein-gated inwardly rectifying K+ channel (GIRK), GIRK1 and GIRK2, the GABA-B agonist baclofen elicited inwardly rectifying K+ currents. The inward K+ currents elicited by baclofen were inhibited by the selective GABA-B antagonists 2-OH saclofen and CGP 35348, and by the GIRK inhibitor Ba2+. In contrast, baclofen caused no currents in oocytes injected with the cerebellar poly(A)+ RNA alone, the poly(A)+ RNA and cRNA for GIRK1 or GIRK2, or only cRNAs for GIRK1 and GIRK2. These findings indicate that GABA-B receptors in the rat cerebellum were functionally expressed in Xenopus oocytes and activated the cloned GIRKs composed of GIRK1 and GIRK2 as heteromultimers.

journal_name

Neuroreport

journal_title

Neuroreport

authors

Uezono Y,Akihara M,Kaibara M,Kawano C,Shibuya I,Ueda Y,Yanagihara N,Toyohira Y,Yamashita H,Taniyama K,Izumi F

doi

10.1097/00001756-199803090-00004

subject

Has Abstract

pub_date

1998-03-09 00:00:00

pages

583-7

issue

4

eissn

0959-4965

issn

1473-558X

journal_volume

9

pub_type

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