Effect of Breviscapine on L-type Calcium Channel in the Hippocampal CA1 Neurons of Whole Brain Ischemiareperfusion Rat Model / 中药新药与临床药理

ABSTRACT

Objective To observe the effect of breviscapine on the open probability(Po)and the average open time(To) of L-type calcium channel in the hippocampal neurons of the whole brain ischemia-reperfusion rat model.Methods The whole brain ischemia rat model was established.At the reperfusion periods of 1.5 h,3.0 h,4.5 h and 6.0 h,the hippoeampal CA1 neurons were dissociated abruptly and the Ca~(2+)electricity of single channel on the neuron membrane were recorded with cell-attach model of patch clamp techniques.The Po and To of the L-type calcium channel were an- alyzed and the effect of the breviscapine was observed.Results Different concentrations of breviscapine can decrease the Po and To of the L-type calcium channel in hippoeampal neurons,particularly within 3 hours after ischemia-reperfu- sion.Conclusions Breviscapine has protective effect on the cerebral ischemia-reperfusion injury.