Tucker J F
Br J Pharmacol. 1984 Oct;83(2):326-8. doi: 10.1111/j.1476-5381.1984.tb16491.x.
In guinea-pig isolated ileum from animals pretreated with Pertussis toxin, the acute inhibitory effects of normorphine and clonidine on electrically induced contractions were markedly attenuated whilst responses to acetylcholine and electrical stimulation were unaltered. Pertussis toxin treatment also reduced naloxone-precipitated withdrawal contractures in normorphine-dependent tissues. These results suggest that the acute and chronic effects of normorphine are mediated by the same mechanism, namely that of adenylate cyclase inhibition.
在经百日咳毒素预处理的豚鼠离体回肠中,去甲吗啡和可乐定对电诱导收缩的急性抑制作用明显减弱,而对乙酰胆碱和电刺激的反应未改变。百日咳毒素处理还减少了去甲吗啡依赖组织中纳洛酮诱发的戒断挛缩。这些结果表明,去甲吗啡的急性和慢性作用是由相同机制介导的,即腺苷酸环化酶抑制机制。