论文部分内容阅读
采用环磷酸腺苷（ｃＡＭＰ）蛋白质结合测定法，测定零浓度，最小浓度，半数有效量（ＥＤ５０）浓度和最大浓度的异丙肾上腺素，去甲伪麻黄素，普萘洛尔，甲基麻黄素对心肌细胞内ｃＡＭＰ含量的影响，结果看到随着异丙肾上腺素，去甲伪麻黄素浓度的增大，心肌细胞内ｃＡＭＰ的含量增加。以量－效曲线中求得的ＥＤ５０浓度对ｃＡＭＰ含量的影响最明显，去甲伪麻黄素对ｃＡＭＰ含量的影响是异丙肾上腺素的４７３％±０１８，随着普萘洛尔，甲基麻黄素浓度的增大，心肌细胞内ｃＡＭＰ含量逐渐减少，在最大浓度时达到最大抑制，甲基麻黄素对ｃＡＭＰ含量的影响是普萘洛尔的３８３％±０２。结果进一步证明，甲基麻黄素在一定浓度范围内具有β－受体阻滞剂的特性。
The concentrations of zero concentration, minimum concentration, median effective concentration (ED50) and the maximum concentration of isoproterenol, nopaline, propranolol, methyl ephedrine were determined by cAMP protein binding assay The effect of cAMP on the content of cAMP in cardiomyocytes showed that the content of cAMP in cardiomyocytes increased with the increase of isoprenaline and noggin pseudoephedrine. The effect of ED50 concentration on the cAMP content obtained by the dose-effect curve was the most obvious. The effect of noradrenaline on the cAMP content was 47.3% ± 0.18 of isoproterenol, , The concentration of methyl ephedrine increased, the content of cAMP in myocardial cells decreased gradually, and reached the maximum inhibition at the maximum concentration. The effect of methyl ephedrine on cAMP content was 383% ± 02 of propranolol. The results further prove that methyl ephedrine has a certain concentration range of β-blockers characteristics.