摘要
目的 建立高效液相色谱法测定家犬血浆中灯盏乙素的浓度 ,研究灯盏乙素在家犬体内的药动学。方法 用高效液相色谱法测定 6只家犬静脉注射灯盏乙素后不同时间血浆中灯盏乙素的浓度 ,绘制药 -时曲线 ,计算药动学参数。结果 灯盏乙素的药 -时曲线符合三室模型 ,其T1 2 pi、T1 2 α和T1 2 β分别为 1.0 5± 0 .80min ,6 .99± 2 .76min和 5 1.6 1± 2 8.78min ;Vc为 880 .1± 5 0 8.3mL ;CL为 189.6± 5 3.8mL·min- 1 ;AUC0 90 和AUC0 ∞ 分别为 5 74 .4 3± 133.95 μg·min·mL- 1 和 5 99.34± 132 .0 0 μg·min·mL- 1 。结论 静脉注射给药后 ,血浆中灯盏乙素浓度迅速下降。灯盏乙素在家犬体内消除较快 ,提示临床给药方法或给药间隔时间的确定、制剂开发的剂型选择都应该考虑其T1 2 。
Aim To establish an RP-HPLC method for the determination of scutellarin in plasma and study its pharmacokinetics in dogs. Methods Scutellarin was given to dogs by intravenous injection and determined by RP-HPLC, the mean plasma concentration-time curve was plotted and pharmacokinetic parameters were calculated by program 3p87. Resu;ts The concentration-time curve of scutellarin could be fitted to three-compartment model with T1/2 pi, T1/2 α and T1/2 β being 1.05 ± 0.80 min, 6.99 + 2.76 min and 51.61 + 28.78 min, respectively, Vc being 880.1 + 508.3 mL, CL being 189.6 + 53.8 mL@ min- 1, and AUC0-90 and AUC0-∞ being 574.43 + 133.95 μg@ min@ mL - 1 and 599.34 ± 132.00μg@ min@mL- 1, respectively. Conclusion The fact that the concentrations of scutellarin in plasma declined rapidly after the medication suggested that the T1/2 of scutellarin should be taken into account in drug administration and preparation development.
