title: Tissue distribution of lignans in rats in response to diet, dose-response, and competition with isoflavones.
abstract: This paper investigates the occurrence and distribution of the lignan metabolites enterodiol (END) and enterolactone (ENL) and the isoflavone daidzein (DAID) in rat tissues by use of liquid chromatography-electrospray ionization mass spectrometry (LC-ESI/MSn) following a variety of dietary regimes. Furthermore, we examined the dose-response and distribution of END and ENL in liver, testes, prostate, and lung, and we investigated the effects of competition between lignans and isoflavones on metabolite distribution. In liver, testes, prostate, and lung tissue, dose-related increases in END concentration were observed. In the testes, coadministration of 60 mg/kg secoisolariciresinol diglycoside (SDG) with 60 mg/kg isoflavones produced alterations in the resulting metabolite profile, causing increased END concentration and decreased DAID concentration. Results indicate lignan accumulation in tissues occurs, and coadministration of lignans with isoflavones affects the metabolite profile, with effects dependent on tissue type.
authors.affiliation: School of Health Sciences and Department of Chemistry, University of Wollongong, New South Wales 2522, Australia.
authors.forename: Timothy
authors.initials: T
authors.lastname: Murray
authors.forename: Jinguo
authors.initials: J
authors.lastname: Kang
authors.forename: Lee
authors.initials: L
authors.lastname: Astheimer
authors.forename: William E
authors.initials: WE
authors.lastname: Price
mesh_terms: D000818:Animals; D001711:Biotransformation; D002853:Chromatography, Liquid; D004032:Diet; D004305:Dose-Response Relationship, Drug; D007529:Isoflavones / Q000494:pharmacology*; D017705:Lignans / Q000493:pharmacokinetics*; D008099:Liver / Q000378:metabolism; D008168:Lung / Q000378:metabolism; D008297:Male; D011467:Prostate / Q000378:metabolism; D051381:Rats; D017207:Rats, Sprague-Dawley; D021241:Spectrometry, Mass, Electrospray Ionization; D014018:Tissue Distribution
chemical_list: D007529:Isoflavones; D017705:Lignans