Comparison on in vitro hepatic metabolic characteristics of five kinds of alkaloids from Coptis chinensis / 中草药

ABSTRACT

Objective: To explore the in vitro hepatic metabolic selectivity of five kinds of isoquinoline alkaloids (with the similar structures) from Coptis chinensis in rats. Methods: Using the method of rat in vitro liver microsomes incubation model, the metabolic kinetics parameters Km, Vmax, and CLint for berberine, palmatine, coptisine, epiberberine, and jateorhizine were calculated by observing the influence of incubation time, protein concentration of liver microsomes, and substrate concentration on metabolic characteristics in liver. Results: The difference of in vitro hepatic metabolic kinetics parameters Km and CLint among five kinds of alkaloids from C. chinensis is statistically significant (P < 0.05). Conclusion: There is a significant selectivity in in vitro hepatic metabolism of five kinds of isoquinoline alkaloids from C. chinensis in rats.