title: A simple determination of mizoribine in human plasma by liquid chromatography with UV detection.
abstract: A simple liquid chromatography (LC) method was developed for determination of the therapeutic level of mizoribine in human plasma. After precipitation of plasma proteins with 6% perchloric acid, mizoribine was determined by LC with spectophotometric detection. The peak height for mizoribine was linearly related to its concentrations, which ranged from 0.09 to 3.13 microg/mL. Therefore, the limit of quantitation was considered to be 0.09 microg/mL. The accuracy was 104.96-107.37%. The intra- and interday relative standard deviation values were in the range of 1.10-3.25%. The detection limit was 0.025 microg/mL, defined as a signal-to-noise ratio of 3. The plasma concentrations of mizoribine were not related to the dosage. Because mizoribine was mainly excreted in the urine, the plasma concentrations of mizoribine might be affected by a change in renal function. Therefore, the mizoribine concentration in blood should be monitored and the dosage adjusted, depending on the condition of renal function. It was suggested that the present method may be applied well in the therapeutic drug monitoring for mizoribine.
authors.affiliation: Shujitsu University, Department of Clinical Pharmacy, School of Pharmacy, Okayama, Japan 703-8516.
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Kaji
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Maiguma
authors.forename: Yoko
authors.initials: Y
authors.lastname: Inukai
authors.forename: Hiroshige
authors.initials: H
authors.lastname: Ono
authors.forename: Ritsuko
authors.initials: R
authors.lastname: Taniguchi
authors.forename: Kazutaka
authors.initials: K
authors.lastname: Makino
authors.forename: Yoshinobu
authors.initials: Y
authors.lastname: Tagawa
authors.forename: Daisuke
authors.initials: D
authors.lastname: Teshima
mesh_terms: D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000032:analysis; D002138:Calibration; D002623:Chemistry Techniques, Analytical / Q000295:instrumentation / Q000379:methods*; D002845:Chromatography; D002853:Chromatography, Liquid / Q000379:methods*; D006801:Humans; D007668:Kidney / Q000378:metabolism; D008956:Models, Chemical; D012044:Regression Analysis; D015203:Reproducibility of Results; D012263:Ribonucleosides / Q000032:analysis* / Q000097:blood*; D013053:Spectrophotometry / Q000379:methods*; D013696:Temperature; D013997:Time Factors; D014466:Ultraviolet Rays
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D012263:Ribonucleosides; C010052:mizoribine