山莨菪碱和异搏定对离体大鼠心脏“缺氧—复氧”损伤的防治作用比较

A comparison of the protective action of verapamil and anisodamine on anoxia-reoxygenation injury of isolated perfused rat heart

本文在离体大鼠心脏灌流模型上,比较山莨菪碱与异搏定对心脏缺氧—复氧损伤(氧反常)的防治作用,结果发现在缺氧期向灌流液中加入山莨菪碱(1.64×10^(-4)M),与异搏定(5×10^(-8)M)都能有效地减轻心脏缺氧—复氧损伤,表现为心功能的恢复,心肌酸中毒和细胞内乳酸脱氢酶的漏出,心肌组织脂质过氧化产物与钙含量增加的程度都有明显改善。然而在复氧灌流期应用异搏定并不能阻止氧反常的发生;但山莨菪碱在复氧期应用时,也能显著减轻氧反常损伤。结果提示山莨菪碱可能具有除钙拮抗作用以外的更广泛的抗缺氧—复氧损伤机制,值得进一步探讨。

This work compared the preventive and therapeutic effect of verapamil and anisodamine on anoxia-reoxygenation injury (oxygen paradox) of isolated rat heart performed with Langendorff apparatus. Results showed that addition of anisodamine (1.64×10^(-4)M) or verapamil (5×10^(-8)M) to the perfusion fluid during anoxic period significantly ameliorated the anoxia-reoxygenation injury of the heart; e. g., the recovery of cardiac functions, the improvement of myocardial acidosis, the decrease in leakage of LDH from myocardium, and in the accumulation of lipid peroxides and calcium. When the drugs were given during the period of reoxygenation, anisodamine was very effective too, but verapamil had no effect. From these results it may be suggested that anisodamine has more extended anti-oxygen-paradox effect in ddition to calcium channel blocker action.