Effect of /-ephedrine on cholinergic neurotransmission in the isolated guinea pig ileum.
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In the isolated guinea pig ileum, the effects of /-ephedrine on the twitch response to field stimulation were investigated in the presence of propranolol. Ephedrine and clonidine inhibited the twitch response but not the contraction to exogenous acetylcholine. The inhibitory effect of clonidine was significantly diminished by yohimbine pretreatment. However, the inhibitory effect of ephedrine was not influenced by yohimbine, sulpiride or 6-hydroxydopamine (6-OHDA) pretreatment. Most of this action of ephedrine appeared to be cholinergic prejunctional in nature, but unrelated to activation of prejunctional α<SUB>2</SUB>-adrenoceptors and dopamine sensitive receptors on the cholinergic nerves in this preparation.
- 公益社団法人 日本薬理学会の論文
公益社団法人 日本薬理学会 | 論文
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