葛根素对大鼠心肌细胞Ito、ICa-L、INa离子通道的影响

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目的通过研究葛根素对大鼠心肌细胞离子通道瞬时外向钾电流(Ito)、L-型钙电流(ICa-L)、钠电流(ICa)的影响,探讨葛根素抗心律失常的机制。方法采用Langendoff胶原酶灌注加浸泡法分离大鼠心室肌细胞,分别用膜片钳全细胞记录各组Ito、ICa-L、INa结果1.2-9.6mmoL/L葛根素对Ito通道没有明显的抑制效应,在高浓度(19.2mmol/L)时,葛根素可抑制Ito电流,达到正常对照组的(21±6)%(R=5,P〈0.05)。低浓度E-4031对I。。通道没有抑制效应,但高浓度
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