title: Metabolic profiling of a potential antifungal drug, 3-(4-bromophenyl)-5-acetoxymethyl-2,5-dihydrofuran-2-one, in mouse urine using high-performance liquid chromatography with UV photodiode-array and mass spectrometric detection.
abstract: 3-(4-bromophenyl)-5-acetyloxymethyl-2,5-dihydrofuran-2-one (LNO-18-22) is a representative member of a novel group of potential antifungal drugs, derived from a natural 3,5-disubstituted butenolide, (-)incrustoporine, as a lead structure. This lipophilic compound is characterized by high in vitro antifungal activity and low acute toxicity. For the purpose of in vivo studies, a new bioanalytical high-performance liquid chromatographic method with UV photodiode-array and mass spectrometric detection (HPLC-PDA-MS), involving a direct injection of diluted mouse urine was developed and used in the evaluation of the metabolic profiling of this drug candidate. The separation of LNO-18-22 and its phase I metabolites was performed in 37 min on a 125 mmx4 mm chromatographic column with Purospher RP-18e using an acetonitrile-water gradient elution. Scan mode of UV detection (195-380 nm) was employed for the identification of the parent compound and its biotransformation products in the biomatrix. Finally, the identity of LNO-18-22 and its metabolites was confirmed using HPLC-MS analyses of the eluate. These experiments demonstrated the power of a comprehensive analytical approach based on the combination of xenobiochemical methods and the results from tandem HPLC-PDA-MS (chromatographic behaviour, UV and MS spectra of native metabolites versus synthetic standards). The chemical structures of five phase I LNO-18-22 metabolites and one phase II metabolite were elucidated in the mouse urine, with two of these metabolites having very unexpected structures.
authors.affiliation: Institute of Experimental Biopharmaceutics, Joint Research Center of PRO.MED.CS Praha a.s. and Academy of Sciences of the Czech Republic, Heyrovského 1207, CZ-500 02 Hradec Králové, Czech Republic. nobilis@uebf.cas.cz
authors.forename: Milan
authors.initials: M
authors.lastname: Nobilis
authors.forename: Milan
authors.initials: M
authors.lastname: Pour
authors.forename: Petr
authors.initials: P
authors.lastname: Senel
authors.forename: Jan
authors.initials: J
authors.lastname: Pavlík
authors.forename: Jirí
authors.initials: J
authors.lastname: Kunes
authors.forename: Marie
authors.initials: M
authors.lastname: Voprsalová
authors.forename: Lenka
authors.initials: L
authors.lastname: Kolárová
authors.forename: Michal
authors.initials: M
authors.lastname: Holcapek
mesh_terms: D000818:Animals; D000935:Antifungal Agents / Q000737:chemistry / Q000652:urine*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005663:Furans / Q000737:chemistry / Q000652:urine*; D008297:Male; D051379:Mice; D015394:Molecular Structure; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*
chemical_list: C522351:3-(4-bromophenyl)-5-acetoxymethyl-2,5-dihydrofuran-2-one; D000935:Antifungal Agents; D005663:Furans