CHEN Jian-zhong, CHOU Gui-xin, WANG Chang-hong, et al. Enzyme Kinetics of Norisoboldine Glucuronidation in Rat Liver Microsomes[J]. Chinese journal of experimental traditional medical formulae, 2012, 18(21): 149-153.
CHEN Jian-zhong, CHOU Gui-xin, WANG Chang-hong, et al. Enzyme Kinetics of Norisoboldine Glucuronidation in Rat Liver Microsomes[J]. Chinese journal of experimental traditional medical formulae, 2012, 18(21): 149-153.DOI:
Objective: To investigate the enzyme kinetics of norisoboldine glucuronidation in rat liver microsomes. Method: An UPLC-MS method was developed for determination of norisoboldine-9-O-α-glucuronide
a major metabolite of norisoboldine
in liver microsomes incubation system with sinomenine as internal standard. An optimum incubation system was found and the enzyme kinetics parameters of norisoboldine-9-O-α-glucuronide were analyzed and calculated with Linewearve-Burk graphic method. Result: The Km
Vmax and CLint(Vmax/Km)of norisoboldine-9-O-α-glucuronide were 40.7 μmol·L-1
909.1 pmol·(min·mg pro)-1 and 22.3 μL·min-1·mg-1
respectively. Conclusion: This method is simple
specific and reliable
which is suitable for the in vitro research of norisoboldine glucuronidation.