摘要
目的:观察苦参碱对豚鼠心室肌动作电位的影响,探讨其抗心律失常的作用机制。方法:豚鼠分为对照组、苦参碱组(10,50,100μmol.L-1)、乌头碱组(1μmol.L-1)、乌头碱(1μmol.L-1)+苦参碱(50μmol.L-1)组,乌头碱(1μmol.L-1)+苦参碱(100μmol.L-1)组;采用标准微电极记录技术记录动作电位时程(APD)、动作电位0相幅值(APA)、动作电位50%复极化时程(APD50)和90%复极化时程(APD90)。结果:苦参碱浓度依赖性(10,50,100μmol.L-1)适度延长APD50和APD90,降低APA;乌头碱明显延长APD(和对照组比较P<0.05),APD50,APD90;苦参碱(100μmol.L-1)能纠正乌头碱对APD,APD50,APD90的过度延长作用(和乌头碱组比较P<0.05或P<0.01)。苦参碱(100μmol.L-1)能显著降低APA(和乌头碱组比较P<0.05)。结论:苦参碱能纠正乌头碱对APD,APD50,APD90的过度延长作用,能使乌头碱诱发心律失常的APA降低,维持动作电位在正常范围可能是苦参碱抗心律失常的机制之一。
Objective: To observe influence of matrine on cell action potential in guinea pig papillary muscles thus to clarify its antiarrhythmic mechanism. Method: Guinea pigs were divided into control group, matrine group (10, 50, 100μmol·L^-1) , aconitine group μmol·L^-1, aconitine 1 μmol·L^-1 + matrine 50 μmol·L^-1 group, aconitine 1 μmol·L^-1 + matrine 100 μmol·L^-1group. Conventional microeleetrode technique was used to record action potential duration (APD), action potential amplitude (APA), 50 % and 90 % of APD repolarization (APD50 and APD90). Result: Matrine could prolong moderately APD50 and APD90 in a dose- dependent manner (10, 50, 100μmol·L^-1) and reduce APA. Aeonitine could excessively prolong APD (vs control group, P 〈 0.05) , APD50 and APD90. Matrine ( 100 μmol·L^-1 ) could remedy for excessive elonggation of aconitine on APD, APD50 and APD90 (vs aeonitine group, P 〈 0.05 or P 〈 0.01 ). Matrine ( 100 μmol·L^-1 ) also could reduce APA (vs aconitine group, P 〈 0.05 ). Conclusion: Matrine could remedy for excessive elonggation of aconitine on APD, APD50 and APDgo and reduce APA of aeonitine-induced arrhythmia, which could maitain action potential in a normal range, and was probably one of matrine antiarrhythmic mechanisms.
出处
《中国实验方剂学杂志》
CAS
北大核心
2012年第24期241-243,共3页
Chinese Journal of Experimental Traditional Medical Formulae
基金
广西自然科学资金项目(桂科自0991154)