Effects of Dendrobium huoshanense on expressions and activities of hepatic microsomal cytochrome P450s in mice.
10.19540/j.cnki.cjcmm.20180709.003
- Author:
Chang-Suo WANG
1
;
Kai WANG
1
;
Xin MENG
1
;
Zhen OUYANG
1
;
Jun DAI
2
;
Nai-Fu CHEN
2
;
Bang-Xing HAN
2
;
Yuan WEI
1
Author Information
1. School of Pharmacy, Jiangsu University, Zhenjiang 212013, China.
2. College of Biotechnology and Pharmaceutical Engineering, West Anhui University, Lu'an 237012, China.
- Publication Type:Journal Article
- Keywords:
Dendrobium huoshanense;
Western blot;
cytochrome P450;
drug-drug interactions
- MeSH:
Animals;
Cytochrome P-450 CYP1A1;
metabolism;
Cytochrome P-450 CYP1A2;
metabolism;
Cytochrome P-450 Enzyme System;
metabolism;
Dendrobium;
chemistry;
Drugs, Chinese Herbal;
pharmacology;
Mice;
Mice, Inbred C57BL;
Microsomes, Liver;
drug effects;
enzymology;
Random Allocation
- From:
China Journal of Chinese Materia Medica
2018;43(21):4323-4329
- CountryChina
- Language:Chinese
-
Abstract:
This study was carried out to investigate the effect of oral administration of Dendrobium huoshanense on the expressions and activities of hepatic microsomal cytochrome P450s in mice, and to provide a reference for the evaluation of drug-drug interactions between D. huoshanense and clinical drugs. The C57BL/6 mice were randomly divided into blank control group, D. huoshanense low dose group (crude drug 1.25 g·kg⁻¹), D. huoshanense high dose group (crude drug 7.5 g·kg⁻¹), and phenobarbital positive control group (0.08 g·kg⁻¹). Each group was intragastrically administered with drugs for 2 weeks. The mice were sacrificed and their liver microsomes were prepared. The expressions of major subtypes of P450 enzyme were determined by Western blot and the probe drugs were used to detect the enzyme activities of P450 subtypes with protein expression changes. Western blot analysis showed that the protein expressions of CYP1A1, CYP1A2 and CYP2B in liver tissues were up-regulated in D. huoshanense-treated group. In vitro enzyme activity tests showed that there were no significant difference in metabolism of 7-ethoxyresorufin (a probe drug for CYP1A1) and bupropion (a probe drug for CYP2B) between D. huoshanense group and control group. The metabolism of phenacetin (a probe drug for CYP1A2) showed a statistical difference in rate Vmax, and it was significantly increased by approximately 20% in D. huoshanense group as compared with the blank control group, and the clearance CLint in treated group was also increased by about 32%. Therefore, oral administration of D. huoshanense had no effects on the activities of most hepatic P450 enzymes in mice, with no drug-drug interaction related to the P450 enzyme system in most clinical drugs theoretically. However, oral administration of D. huoshanense may accelerate the metabolism of CYP1A2-catalyzed drugs, which needs to be considered in clinical practice.
