title: Effect of methanol extract of Zanthoxylum piperitum leaves and of its compound, protocatechuic acid, on hepatic drug metabolizing enzymes and lipid peroxidation in rats.
abstract: The effect of methanol extract and protocatechuic acid from the leaves of Zanthoxylum piperitum on lipid peroxidation and drug metabolizing enzymes were investigated in the liver of bromobenzene-treated rats. The methanol extract and protocatechuic acid reduced the level of lipid peroxide induced by bromobenzene. The methanol extract and protocatechuic acid reduced the activity of aniline hydroxylase that had been increased by bromobenzene, while did not affect the activities of aminopyrine N-demethylase and glutathione S-transferase. The methanol extract and compound effectively restored the activity of epoxide hydrolase which had been decreased by bromobenzene. These results may suggest that the methanol extract of Z. piperitum and protocatechuic acid prevented lipid peroxidation by reducing the activity of aniline hydroxylase, an epoxide-producing enzyme, and by enhancing the activity of epoxide hydrolase, an epoxide-removing enzyme, in rats that had been intoxicated with bromobenzene.
authors.affiliation: Department of Oriental Medicine Resources and Research Institute of Korean Oriental Medicine, Suncheon, Jeonnam 540-742, Korea.
authors.forename: Jong Moon
authors.initials: JM
authors.lastname: Hur
authors.forename: Ju Gwon
authors.initials: JG
authors.lastname: Park
authors.forename: Ki Ho
authors.initials: KH
authors.lastname: Yang
authors.forename: Jong Cheol
authors.initials: JC
authors.lastname: Park
authors.forename: Jeong Ro
authors.initials: JR
authors.lastname: Park
authors.forename: Soon Sil
authors.initials: SS
authors.lastname: Chun
authors.forename: Jae Sue
authors.initials: JS
authors.lastname: Choi
authors.forename: Jong Won
authors.initials: JW
authors.lastname: Choi
mesh_terms: D000818:Animals; D016588:Anticarcinogenic Agents / Q000494:pharmacology*; D001969:Bromobenzenes / Q000494:pharmacology; D004851:Epoxide Hydrolases / Q000378:metabolism; D004852:Epoxy Compounds / Q000378:metabolism; D005978:Glutathione / Q000378:metabolism; D062385:Hydroxybenzoates / Q000494:pharmacology*; D015227:Lipid Peroxidation / Q000187:drug effects*; D008099:Liver / Q000187:drug effects / Q000201:enzymology*; D008297:Male; D000432:Methanol; D004364:Pharmaceutical Preparations / Q000378:metabolism*; D010936:Plant Extracts / Q000494:pharmacology; D018515:Plant Leaves / Q000737:chemistry; D014176:Protein Biosynthesis; D051381:Rats; D017207:Rats, Sprague-Dawley; D012997:Solvents; D032106:Zanthoxylum / Q000737:chemistry*
chemical_list: D016588:Anticarcinogenic Agents; D001969:Bromobenzenes; D004852:Epoxy Compounds; D062385:Hydroxybenzoates; D004364:Pharmaceutical Preparations; D010936:Plant Extracts; D012997:Solvents; C009091:protocatechuic acid; C032036:bromobenzene; D004851:Epoxide Hydrolases; D005978:Glutathione; D000432:Methanol