فهرست مطالب نویسنده:
mehdi ahadi barzoki
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BackgroundThe purpose of this study was to characterize the pharmacokinetic parameters of mycophenolic acid (MPA) in Iranian kidney transplant patients.MethodsPlasma MPA concentration of mycophenolate mofetile (MMF) 1 gram two times a day was measured in 21 Iranian kidney transplant recipients receiving treatment. Patients who entered the study had been transplanted for more than 3 months and their drug level was supposed to be at steady state. MMF concentration was measured with high-performance liquid chromatography (HPLC).ResultsThe plasma MPA concentration-time curve was characterized by an early sharp peak at about 1 hour postdose. The mean Area Under Curve (AUC), Cmax and Tmax were 47.0±18.3 µg.h/ml, 18.6±8.5 µg/ml and 1.0±0.5 hours respectively.ConclusionThe plasma MPA concentration-time curve pattern of Iranian patients was similar and consistent with previously reported profiles in other populations taking the same dose.Keywords: Mycophenolate mofetil, Mycophenolic acid, Pharmacokinetics, Area Under Curve, Kidney transplantation
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A simple, sensitive and reproducible HPLC method is presented for determination of mycophenolic acid(MPA) in human plasma. Samples were prepared after precipitation of the plasma protein by addition of acetonitrile and naproxen was used as internal standard (I.S.). Separation was performed by reversedphase HPLC, using a Hamilton PRP-C18 Column, 51% acetonitrile and 49% potassium phosphate buffer (20 mM) at pH 3.0 as mobile phase, flow rate of 1.0 ml/min, and UV detection at 215 nm. MPA and I.S. had retention times of 7.5 and 11.35 min, respectively. The method showed an acceptable linearity in the range of 0.1µg/ml-40µg/ml with r2 of. 9992. The concentration of 0.1µg/ml was determined as quantification limit. Mean absolute recovery was 94.8%. The mean intra- and inter-day reproducibility of method was 4.6 and 11.4% respectively.
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