Determination of mycophenolic acid and its phenol glucuronide metabolite in human plasma and urine by high-performance liquid chromatography.
Simultaneous determination of mycophenolic acid (MPA) and mycophenolate phenol glucuronide (MPAG) in plasma and urine was accomplished by isocratic HPLC with UV detection. Plasma was simply deproteinated with acetonitrile and concentrated, whereas urine was diluted prior to analysis. Linearity was observed from 0.2 to 50 microg/ml for both MPA and MPAG in plasma and from 1 to 50 microg/ml of MPA and 5 to 2000 microg/ml MPAG in urine with extraction recovery from plasma greater than 70%. Detection limits using 0.25 ml plasma were 0.080 and 0.20 microg/ml for MPA and MPAG, respectively. The method is more rapid and simple than previous assays for MPA and MPAG in biological fluids from patients.
Wiwattanawongsa
K
K
School of Pharmacy and Curriculum in Toxicology, University of North Carolina at Chapel Hill, 27599, USA.
Heinzen
E L
EL
Kemp
D C
DC
Dupuis
R E
RE
Smith
P C
PC
D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D020719:Glucuronides / Q000097:blood / Q000493:pharmacokinetics* / Q000652:urine; D006801:Humans; D007166:Immunosuppressive Agents / Q000097:blood / Q000493:pharmacokinetics* / Q000652:urine; D009173:Mycophenolic Acid / Q000097:blood / Q000493:pharmacokinetics* / Q000652:urine; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet
D020719:Glucuronides; D007166:Immunosuppressive Agents; D009173:Mycophenolic Acid