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钩藤碱和异钩藤碱对45Ca转运的影响
Effects of Rhynchophylline and Isorhynchophylline on the (45)~Ca-transportation in rabbit aorta
【摘要】 在离体家兔主动脉条.钩藤碱和异钩藤碱明显减少KCl(77.0 mmol·L-1)溶液所致45Ca内流量、不影响去甲肾上腺素所引起的45Ca内流和外溢。结果表明.钩藤碱和异钩藤碱对电位依赖性钙通道具有阻滞作用。
【Abstract】 The effects of Rhynchophylline (Rhy) and Isorhychophyiline (Isorhy), the alkaloids abstracted from the Chinese traditional herb Uncaria rhynchophyllia (Miq) Jackson, on the 45Ca-influx and efflux were investigated in rabbit aorta. Both Rhy and Isorhy (10 μmol· L-1) inhibited the 45Ca-influx induced by high K+(77. 0 mmol · L-1), but neither significant-ly influenced the 45Ca-influx and efflux induced by noradrenaline (10 μmol · L-1). The results suggest that these alkaloids block the Voltage-dependent calcium channel.
【关键词】 钩藤碱;
异钩藤碱;
45Ca内流;
血管平滑肌;
电位依赖性钙通道;
【Key words】 Rhynchophylline; Isorhynchophylline; (45)Ca-influx voltage-dependent Ca2+ channel; vascular smooth muscle;
【Key words】 Rhynchophylline; Isorhynchophylline; (45)Ca-influx voltage-dependent Ca2+ channel; vascular smooth muscle;
【基金】 贵州省科委资助
- 【文献出处】 中国药理学通报 ,Chinese Pharmacological Bulletin , 编辑部邮箱 ,1993年06期
- 【被引频次】48
- 【下载频次】144