摘要
本文观察了海洋硫酸多糖DPS对去甲肾上腺素（NA）和氯化钾（KCl）所致大鼠主动脉环收缩反应的影响。结果表明,DPS 1mg·L-1能抑制NA和KCl所致大鼠主动脉环收缩,使量效反应曲线非平行性右移,压低最大反应曲线,显示DPS对NA和KCl所致大鼠主动脉环收缩具有非竞争性拮抗作用。提示,DPS有抑制电压依赖性Ca2+通道和受体活化性Ca2+通道的作用。
The effects of D-polymannuronic sulfate (DPS) on the norepinephrine (NA) or potassium chloride (KCL)-induced contraction of rat aortic rings were studied in this paper. The results showed that DPS at the final concentration of Img · L-1 inhibited the contraction of aortic rings e-voked by NA or KCL and shift doseresponse curves for NA or KCL to the right in a non-parallel fa-sion and depressed their maximal response, implicating that DPS afforded the noncompetitive antagonism on contraction of rat aortic rings induced by NA or KCL. This finding suggested that DPS exerted an inhibitory action of potential-dependent calcium channel and that of receptor-operated calcium channel in vascular smooth muscle.
出处
《中国海洋药物》
CAS
CSCD
2002年第3期8-9,14,共3页
Chinese Journal of Marine Drugs
