ZHANG Huishan,WANG Tianming,WANG Mei,et al.Effects of diabetes on glucuronidation metabolism of baicalin[J].Shanghai Journal of Traditional Chinese Medicine,2025,59(6):75-80.
ZHANG Huishan,WANG Tianming,WANG Mei,et al.Effects of diabetes on glucuronidation metabolism of baicalin[J].Shanghai Journal of Traditional Chinese Medicine,2025,59(6):75-80. DOI: 10.16305/j.1007-1334.2025.z20250102002.
Effects of diabetes on glucuronidation metabolism of baicalin
To study the stability and enzyme kinetics of glucuronidation metabolism of baicalin, and explore the effects of diabetes on baicalin metabolism.
Methods
2
Rat liver microsomes (RLMs) were prepared by the differential centrifugation method. Baicalin was metabolized
in vitro
by being incubated with normal and diabetic RLMs. The concentration of metabolites was determined by high performance liquid chromatography method and corrected by the "correlation coefficient", and the enzymatic kinetic parameters were calculated.
Results
2
After incubation with RLMs, baicalin could generate a glucuronide metabolite. The enzymatic kinetics within the concentration range of 3-300 μmol·L
-1
conformed to the Michaelis-Menten equation. Under normal and diabetes conditions, the Michaelis constants (
K
m
) were (44.4±13.0) and (46.4±1.8) μmol·L
-1
, respectively, and the maximum reaction rates (
V
max
) were (761.7±109.6) and (1 571.0±178.0) pmol·min
-1
·mg
-1
, respectively. The intrinsic metabolic clearance rates (
Cl
int
) were 18.5 and 33.7 μL·min
-1
·mg
-1
, respectively. Compared with normal rats, the glucuronidation metabolic capacity of baicalin in the diabetic rat liver microsomes was significantly enhanced (
P
<
0.05).
Conclusion
2
Baicalin can be metabolized into a glucuronide metabolite in rat liver microsomes, and the diabetic state can accelerate the glucuronidation metabolism of baicalin.
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