title: Apple procyanidin oligomers absorption in rats after oral administration: analysis of procyanidins in plasma using the porter method and high-performance liquid chromatography/tandem mass spectrometry.
abstract: In this study, we investigated the absorption of apple procyanidins, namely, apple condensed tannins (ACTs), in rats using the Porter method and high-performance liquid chromatography/tandem mass spectrometry. The apple procyanidin concentrations in the rat plasma reached a maximum 2 h after administration and decreased thereafter. To investigate the limits of the absorption of apple procyanidins in the polymerization degree, we administered the procyanidin oligomer fraction, which was separated from ACT using normal-phase chromatography according to the degree of polymerization. Procyanidins from each dimer to pentamer group were detected in the plasma by the Porter method. Moreover, by the study using reconstituted procyanidins, polymeric procyanidins influenced the absorption of procyanidin oligomers. These results suggest that ACTs are absorbed and directly involved in physiological functions in the rats.
authors.affiliation: Fundamental Research Laboratory, Asahi Breweries, Ltd., I-21, Midori 1-chome, Moriya-shi, Ibaraki 302-0106, Japan. toshihik.shoji@asahibeer.co.jp
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Shoji
authors.forename: Saeko
authors.initials: S
authors.lastname: Masumoto
authors.forename: Nina
authors.initials: N
authors.lastname: Moriichi
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Akiyama
authors.forename: Tomomasa
authors.initials: T
authors.lastname: Kanda
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Ohtake
authors.forename: Yukihiro
authors.initials: Y
authors.lastname: Goda
mesh_terms: D000042:Absorption; D000818:Animals; D002851:Chromatography, High Pressure Liquid; D019281:Dimerization; D044948:Flavonols / Q000032:analysis; D005638:Fruit / Q000737:chemistry*; D027845:Malus / Q000737:chemistry*; D013058:Mass Spectrometry; D044945:Proanthocyanidins / Q000008:administration & dosage* / Q000097:blood / Q000493:pharmacokinetics*; D051381:Rats
chemical_list: D044948:Flavonols; D044945:Proanthocyanidins