title: Selective determination of doxorubicin and doxorubicinol in rat plasma by HPLC with photosensitization reaction followed by chemiluminescence detection.
abstract: A highly sensitive and selective high-performance liquid chromatography (HPLC) method was developed for the determination of doxorubicin (DXR) and its metabolite doxorubicinol (DXR-ol) in rat plasma. The method was based on photosensitization reaction followed by peroxyoxalate chemiluminescence detection (PO-CL). DXR and DXR-ol that were fluorescent quinones, served as a photosensitizer in the presence of a hydrogen atom donor such as ethanol under aerobic conditions to produce hydrogen peroxide. Then the generated hydrogen peroxide and DXR or DXR-ol were monitored through PO-CL reaction by mixing with aryloxalate as a single post-column reagent that enabled highly selective and sensitive determination of DXR and DXR-ol. The separation of DXR and DXR-ol by HPLC was accomplished isocratically on an ODS column within 15 min. The method involves a simple one step protein precipitation by methanol and a sample size of 50-microL was sufficient. Besides, it can detect accurately the low plasma concentrations. The detection limits (signal-to-noise ratio=3) were 4.5 and 3.8 fmol for DXR and DXR-ol, respectively. The percentage recovery was found to be 90.7-102.4% and the inter- and intra-assay RSD values in rat plasma were 2.5-8.9%. The method has been successfully used to study pharmacokinetic profiles of DXR and DXR-ol in rats after a single-dose of DXR.
authors.affiliation: Graduate School of Biomedical Sciences, Course of Pharmaceutical Sciences, Nagasaki University, Nagasaki, Japan.
authors.forename: Sameh
authors.initials: S
authors.lastname: Ahmed
authors.forename: Naoya
authors.initials: N
authors.lastname: Kishikawa
authors.forename: Kaname
authors.initials: K
authors.lastname: Ohyama
authors.forename: Mitsuhiro
authors.initials: M
authors.lastname: Wada
authors.forename: Kenichiro
authors.initials: K
authors.lastname: Nakashima
authors.forename: Naotaka
authors.initials: N
authors.lastname: Kuroda
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid; D004317:Doxorubicin / Q000031:analogs & derivatives* / Q000097:blood*; D008163:Luminescent Measurements; D010777:Photochemistry / Q000379:methods; D051381:Rats
chemical_list: D004317:Doxorubicin; C010013:adriamycinol