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- W2364200764 abstract "AIM:To investigate the effects of anisodamine on the sodium current (INa) in left ventricular myocytes of rabbit heart undergoing ischemia/reperfusion,so as to explore the cellular (ionic) basis of anisodamine treatment for antiarrhythmia. METHODS:Forty-five rabbits were randomly divided into three groups:ischemic/reperfusion group (I/R),anisodamine intervention group (Ani+I/R) and sham-operated control group (CON). Anesthetized rabbits were subjected to 30 min ischemia by ligation of the left anterior descending coronary artery and 60 min reperfusion. The animals in Ani group were injected with anisodamine at a dose of 5 mg/kg via femoral vein 1 min before operation. The incidence of ventricular arrhythmia was observed. Single ventricular myocytes were isolated enzymatically from the epicardial zone of the infracted region derived from the hearts in I/R,Ani+I/R group and the same anatomy region in CON. Whole cell patch clamp technique was used to record INa. RESULTS:Anisodamine intervention decreased the incidence and duration of ventricular arrhythmia by reperfusion compared to I/R group,resulting in significant decrease in the scores of arrhythmia (2.6±0.7 vs 3.6±0.8,P0.05). The peak INa current density (at-30 mV) was significantly decreased in I/R group (-22.46±5.32 pA/pF,n=12) compared to CON (-42.78±5.48 pA/pF,n=16,P0.01),while it was significantly increased in Ani+I/R group (-38.89±5.24 pA/pF,n=13) compared to I/R group (P0.01). CONCLUSION:Anisodamine has the ability to reduce the occurrence of ventricular arrhythmia. Ischemia-reperfusion induces significant down-regulation of INa,while pretreatment with anisodamine attenuates this change,suggesting that anisodamine reverses this electrical remodeling,which may be partly responsible for its antiarrhythmia effects." @default.
- W2364200764 created "2016-06-24" @default.
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- W2364200764 date "2010-01-01" @default.
- W2364200764 modified "2023-10-12" @default.
- W2364200764 title "Effects of anisodamine on sodium current in isolated ventricular myocytes from ischemia-reperfusion myocardium of rabbits" @default.
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