2、度依赖性的舒张作用(p>0.05);山茱萸核多酚对kcl(6×10-2mol·L-1)预收缩的内皮完整或去内皮血管环均产生显著地阻断山茱萸核多酚的舒张血管的作用;结论:山茱萸核多酚的部分依赖性血管舒张作用的机制可能是对 K+ 通道有阻断作用。关键词:山茱萸核多酚,腹主动脉,K+通道,内皮,α受体ACTIONSOFDOGWOODNUCLEARPOLYPHENOLSONISOLATEDRATORRABBITABDOMINALAORTICRINGSABSTRACT OBJECTIVE: To know the effects and mechanisms of Dogwoodnu
3、clearpolyphenolsfor blood vessel.METHODS:The tension of rat a-ndrabbitabdominalaorticrings was measured.RESULTS:Dogwoodnuclearpolyphenols(0.1g/ml) caused concentration—dependent relaxation in NE(5×10-7mol·L-1)orkclandkcl+Indopreconstrictedabdominalaortic rings with or without endothelium Th
4、e relaxation res-ponse of Dogwoodnuclearpolyphenols;Pre-contractionofvascularendotheliumintactordenudedringscausedbykcl(6×10-2mol·L-1)wereblockedsignificantlybyDogwoodnuclearpolyphenols;CONC-LUSION:PartiallydependentvasodilationmechanismsofdogwoodnuclearpolyphenolsmaybetheblockofK+channel.K