title: High-performance liquid chromatography determination of mycophenolic acid and its glucuronide metabolite in human plasma.
abstract: Two HPLC-UV assays are reported here: one is a rapid assay for mycophenolic acid (MPA) and the other is a simultaneous assay for MPA and its metabolite mycophenolic acid glucuronide (MPAG). For both methods, plasma samples (500 microl) with added internal standard were acidified and extracted using C18 solid-phase extraction cartridges. Chromatographic separation was achieved on a C18 Novapak column using a mobile phase consisting of methanol-0.05% orthophosphoric acid (40:60, v/v) for the rapid MPA assay and 30:70 for the simultaneous MPA and MPAG assay. The assays were linear over the ranges 0.1 to 50.0 mg/l for MPA and 2.8 to 225.8 mg/l for MPAG. Mean absolute recovery for all analytes was >99%. These methods are suitable for therapeutic drug monitoring and pharmacokinetic studies.
authors.affiliation: Department of Clinical Pharmacology, Princess Alexandra Hospital, Brisbane, QLD, Australia.
authors.forename: C E
authors.initials: CE
authors.lastname: Jones
authors.forename: P J
authors.initials: PJ
authors.lastname: Taylor
authors.forename: A G
authors.initials: AG
authors.lastname: Johnson
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005965:Glucuronates / Q000097:blood* / Q000493:pharmacokinetics; D020719:Glucuronides; D006801:Humans; D009173:Mycophenolic Acid / Q000031:analogs & derivatives* / Q000097:blood* / Q000493:pharmacokinetics
chemical_list: D005965:Glucuronates; D020719:Glucuronides; C113145:mycophenolic acid glucuronide; D009173:Mycophenolic Acid