The Inhibitory Effect of Achyranthes bidentata radix Extracts on Cytochrome P450-Catalyzed Reactions in Human Liver Microsomes

인체 간 Microsome에서 우슬 추출물의 Cytochrome P450 약물 대사효소에 대한 억제작용

  • 김경아 (경희대학교 동서의학연구소 통증 및 신경의학연구팀) ;
  • 이지숙 (경희대학교 동서의학연구소 통증 및 신경의학연구팀) ;
  • 박히준 (경희대학교 동서의학연구소 통증 및 신경의학연구팀) ;
  • 김진우 (경희대학교 동서의학연구소 통증 및 신경의학연구팀) ;
  • 김창주 (경희대학교 동서의학연구소 통증 및 신경의학연구팀) ;
  • 심인섭 (경희대학교 동서의학연구소 통증 및 신경의학연구팀) ;
  • 한승무 (경희대학교 동서의학연구소 통증 및 신경의학연구팀) ;
  • 임사비나 (경희대학교 동서의학연구소 통증 및 신경의학연구팀)
  • Published : 2003.06.01

Abstract

Objectives : Achyranthes bidentata radix (Usul) has been used as anti-arthritic, antiallergic, antidiuretic, and so on. Recently extracts of Achyranthes bidentata radix have shown anti-inflammatory and cancer preventive effects in vitro and in vivo. Methods : We therefore evaluated the inhibitory potential of ethanol extracts of Achyranthes bidentata radix on cytochrome P450 (CYP) isoforms-catalyzed reactions, which relate to causes of cancer and inflammation, including CYP1A2, CYP2C9, CYP2C19, CYP2E1, CYP2D6, CYP2C8, and CYP3A4, using human liver microsomal preparations. Results : The extracts showed weak or negligible inhibitory effects on CYP2C9-catalyzed (S)-warfarin 7-hydroxylation, CYP2C19-catalyzed S-mephenytoin 4-hydroxylation, and CYP2D6-catalyzed dextromethorphan O-demethylation with each IC50 over 1750 g/ml, respectively. However, it showed relatively significant inhibitory effect on CYP1A2-catalyzed phenacetin O-deethylation and CYP2E1-catalyzed chlorzoxazone 6-hydroxylation with IC50s of 970.5 g/ml and 821.4 g/ml, respectively. Conclusions : These results suggest that extracts of Achyranthes bidentata radix have inhibitory effects on CYP-catalyzed reactions, especiallyCYP1A2 and CYP2E1, in human liver microsomes. These effects appear to relate to anti-inflammatory and cancer prevention following decrease of reactive oxygen species formed by CYP, especially CYP1A2 and CYP2E1, by Achyranthes bidentata radix. However, further evaluation is necessary to demonstrate and to confirm its effects in human.

Keywords

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