title: Effects of an ethanol extract of Brazilian green propolis on human cytochrome P450 enzyme activities in vitro.
abstract: Supplement-drug interaction on CYP enzyme activity is occasionally found to cause clinically adverse events, and no report on interactions of propolis is available either in vitro or clinical. In this study, we tried to estimate the risk of an interaction between an ethanol extract of Brazilian green propolis (EEP-B55) and drugs in vitro and in vivo. The activities of CYP1A2, CYP2C9, CYP2C19, CYP2D6, and CYP3A4 were attenuated by EEP-B55 in a concentration-dependent manner, and artepillin C, kaempferide, dihydrokaempferide, isosakuranetin, and kaempferol were estimated to have potential for CYP inhibition. The IC50 values of artepillin C for each CYP were approximately 33-fold higher than its Cmax in the blood of rats after dosing with 5-fold the recommended daily intake of EEP-B55. These findings suggest that liver CYP enzyme activities are not markedly affected by artepillin C at the recommended daily intake of EEP-B55.
authors.affiliation: Nagaragawa Research Center, API Co., Ltd., 692-3 Nagara, Gifu 502-0071, Japan.
authors.forename: Kyoko
authors.initials: K
authors.lastname: Naramoto
authors.forename: Masashi
authors.initials: M
authors.lastname: Kato
authors.forename: Kenji
authors.initials: K
authors.lastname: Ichihara
mesh_terms: D000818:Animals; D001938:Brazil; D065607:Cytochrome P-450 Enzyme Inhibitors / Q000737:chemistry* / Q000378:metabolism; D003577:Cytochrome P-450 Enzyme System / Q000737:chemistry* / Q000378:metabolism; D018565:Food-Drug Interactions; D006801:Humans; D007700:Kinetics; D008297:Male; D011429:Propolis / Q000737:chemistry* / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar
chemical_list: D065607:Cytochrome P-450 Enzyme Inhibitors; D011429:Propolis; D003577:Cytochrome P-450 Enzyme System
keywords: artepillin C; cytochrome P450; interaction; propolis