title: Effect of food intake on the oral absorption of poorly water-soluble drugs: in vitro assessment of drug dissolution and permeation assay system.
abstract: The aim of the present work was to establish appropriate conditions for the dissolution/permeation system (D/P system) to estimate the effect of food intake on oral drug absorption. The D/P system is an in vitro assay system to evaluate the drug dissolution and permeation processes after oral administration. Caco-2 monolayer was used as a model membrane of the intestinal epithelium. In this study, two types of simulated intestinal fluid reflecting the fasted and the fed state conditions of the human gastrointestinal tract were used. Drugs were applied to the D/P system as a powder, then, permeated amounts of drugs into the basal side were monitored. A sigmoidal correlation was obtained between in vivo oral absorption (% absorbed of dose) and in vitro permeated amount (% of dose/2 h) under both states. From the D/P system, the estimated absorption of albendazole in both states was found to correspond well with in vivo observation. Moreover, the D/P system could estimate the effect of self-emulsifying formulation on the oral absorption of danazol, quantitatively. In conclusion, the D/P system was proved to be a useful assay system not only for the oral absorption of drugs, but also for the food effect on the absorption.
authors.affiliation: Faculty of Pharmaceutical Sciences, Setsunan University, Hirakata, Osaka 573-0101, Japan. makoto@pharm.setsunan.ac.jp
authors.forename: Makoto
authors.initials: M
authors.lastname: Kataoka
authors.forename: Yoshie
authors.initials: Y
authors.lastname: Masaoka
authors.forename: Shinji
authors.initials: S
authors.lastname: Sakuma
authors.forename: Shinji
authors.initials: S
authors.lastname: Yamashita
mesh_terms: D000465:Algorithms; D001702:Biopharmaceutics; D001826:Body Fluids / Q000737:chemistry; D018938:Caco-2 Cells; D002851:Chromatography, High Pressure Liquid; D003613:Danazol / Q000008:administration & dosage / Q000737:chemistry / Q000493:pharmacokinetics; D004553:Electric Conductivity; D004655:Emulsions; D004965:Estrogen Antagonists / Q000008:administration & dosage / Q000737:chemistry / Q000493:pharmacokinetics; D018565:Food-Drug Interactions; D006801:Humans; D007408:Intestinal Absorption; D010539:Permeability; D004364:Pharmaceutical Preparations / Q000737:chemistry / Q000378:metabolism*; D011092:Polyethylene Glycols; D011237:Predictive Value of Tests; D012995:Solubility
chemical_list: D004655:Emulsions; D004965:Estrogen Antagonists; D004364:Pharmaceutical Preparations; C104509:gelucire 44-14; D011092:Polyethylene Glycols; D003613:Danazol