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KMID : 0870420170210010011
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Korean Journal of Hepato-Biliary-Pancreatic Surgery
2017 Volume.21 No. 1 p.11 ~ p.16
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Intra-individual variability of mycophenolic acid concentration according to renal function in liver transplant recipients receiving mycophenolate monotherapy
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Hwang Shin
Song Gi-Won
Jung Dong-Hwan
Park Gil-Chun
Ahn Chul-Soo
Moon Deok-Bog
Ha Tae-Yong
Kim Ki-Hun
Lee Sung-Gyu
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Abstract
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Backgrounds/Aims: Mycophenolate mofetil (MMF) has wide inter- and intra-individual variability of mycophenolic acid (MPA) after liver transplantation (LT). On this study, we aimed to analyse the intra-individual variability of MPA concentration in stable adult LT recipients receiving MMF monotherapy and develop a method to determine the target level in the situation of wide intra-individual variability.
Methods: This retrospective cross-sectional study included 30 LT recipients. All patients received MMF monotherapy at a dose of 500 mg twice daily for ≥2 years and were divided into two groups based on renal function. MPA concentration-associated values were presented as mean with standard deviation and coefficient of variation (CV).
Results: The normal renal function group (n=15) showed a mean 12-hour MPA concentration of 2.5±0.5 μg/ml (range, 1.8±0.5 to 3.6±0.7 μg/ml) and a mean CV of 20.4±7.7% (range, 8.7% to 39.4%). In the renal dysfunction group (n=15), the 12-hour MPA concentration fluctuated more widely with a mean value of 3.7±0.9 μg/ml (range, 2.8±0.8 to 5.1±1.2 μg/ml) and a mean CV of 24.5±4.9% (range, 17.1% to 37.5%). The 12-hour MPA concentration was significantly higher in the renal dysfunction group, as compared to the normal renal function group (p=0.001); whereas, the CV was not significantly different between the two groups (p=0.093).
Conclusions: We determined the inter- and intra-individual variability of 12-hour MPA concentration after LT. The results suggested that therapeutic drug monitoring of MPA is necessary due to the inter-individual and intra-individual variability of MMF pharmacokinetics, especially in LT recipients with renal dysfunction.
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KEYWORD
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Renal function, Mycophenolate mofetil, Mycophenolic acid, Variability, Liver transplantation
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