ABSTRACT
This paper was aimed to study the human plasma protein binding rate of diterpene ginkgolides meglumine injection.The equilibrium dialysis was used to determine the human plasma protein binding rate of ginkgolide A (GA),ginkgolide B (GB) and ginkgolide K (GK) in diterpene ginkgolides meglumine injection.The LC-MS/MS method was used for the content determination of ginkgolides.And then,the plasma protein binding rate was calculated.The results showed that there was no interference from other ingredients for the determination of ginkgolides.The calibration curve of the analytes was in good linearity in certain range of contents.The precision and stability of the analytes met the methodology requirements.After 8 h incubation,the human plasma protein binding rate of GA,GB and GK achieved balance.The human plasma protein binding rate of GA (0.34,1.70 and 8.51μg·mL-1) was 84.03%-88.11%; the human plasma protein binding rate of GB (0.62,3.09 and 15.5μg·mL-1) was 41.21%-53.56%; the human plasma protein binding rate of GK (0.04,0.20 and 1.01μg·mL-1) was 45.24%-59.59%.It was concluded that the method was simple,rapid and sensitive,which met the analysis requirement for biological samples.GA had a high plasma protein binding rate; GB and GK had medium plasma protein binding rate.
ABSTRACT
Objective To study the protein binding rate of brucine in plasma of rats.Methods The plasma balance dialysis was used.HPLC was performed for the quantitative determination of brucine,and then the protein binding rate of brucine in rats plasma was calculated.Results The protein binding rate was 59.679 %,59.935 %,and 56.387 %when the concentration of plasma brucine was 2.5,1,and 0.4 ?g?mL-1 respectivley.Conclusion The HPLC method used to determine brucine is simple,rapid,and sensitive,and with good specificity,precision and accuracy.Brucine has medium capacity in binding to plasma protein.