摘要
研究壳聚糖对豚鼠单一心室肌细胞延迟外向钾电流(I_k)的作用,从离子通道角度初步探讨其作用机理。应用膜片钳全细胞记录方式,设保持电位为-40mV,指令电位为-60～+70mV,步阶脉冲10mV,刺激频率1Hz,波宽300ms,刺激间隔6s的方波钳制方案。结果表明壳聚糖能抑制I_k,并具有浓度依赖关系,能抑制豚鼠单一心室肌细胞延迟外向K^+电流。
To study the effect of chitosan on delayed outward potassium current(IK) in single ventricular myocytes of guinea pig and investigate its antiarrhythmic mechanism from ion channel view. Patch clamp technique with whole-cell configuration. Holding potential was -40mV,commanding potential was -60- + 70mV ,step pulse +10mV,stimulating frequency 1 Hz,duration 300 ms and stimulating interval 6s. The result showed that Chitosan inhibited IK in a dose -dependent manner. Conclusion :Chitosan can inhibite IK in single ventricular myocytes of guinea pig.
出处
《中国海洋药物》
CAS
CSCD
1998年第4期4-7,共4页
Chinese Journal of Marine Drugs
