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Limited sampling strategy for the estimation of the area under the concentration-time curve for ganciclovir in Chinese adult renal allograft recipients

  • Wen-Bin Rui
  • Hui-Min An
  • Kun Shao
  • Xiao-Hui Zhai
  • Jia-Qian Lu
  • Shan-Shan Hu
  • Bing Chen
  • Pei-Jun Zhou
Pharmacokinetics and Disposition
  • 4 Downloads

Abstract

Objectives

Valganciclovir (VGCV) treatment is recommended for the prevention of cytomegalovirus (CMV) infection in renal allograft recipients. The aim of the present study is to investigate the pharmacokinetic characteristics of ganciclovir (GCV) after administration of VGCV in Chinese adult renal allograft recipients and estimate the exposure to GCV using limited sampling strategy (LSS).

Methods

Forty Chinese renal allograft recipients were given 450 mg or 900 mg VGCV daily. Blood samples were drawn before treatment and 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, and 24 h after 5 days of VGCV therapy, and the plasma concentrations of VGCV and GCV were determined using a liquid chromatography-mass spectrometry assay. The major pharmacokinetic parameters for GCV and VGCV were determined using a noncompartmental assay. Multiple stepwise linear regression analysis was conducted to establish a model equation for the estimation of the GCV AUC0–24 h in Chinese patients using LSS.

Results

In the 450 and 900 mg groups, the Cmax for VGCV was 0.2 ± 0.10 and 0.4 ± 0.16 mg/L, respectively; the Cmax for GCV was 4.2 ± 1.1 and 8.6 ± 1.6 mg/L, respectively; and the AUC0–24 h for GCV was 28.4 ± 8.4 and 60.7 ± 17.5 mg·h/L, respectively. For the establishment of LSS models, 40 patients were divided into the training group (n = 24) and validation group (n = 16). The model equations used for the calculation of AUC0–24 h for GCV were established in the training group by using multiple linear regression assay. Equations including AUC = 8.1 + 29.7 × C0 + 5.7 × C4 (r2 = 0.91) and AUC = − 0.4 + 11.0 × C0 + 2.1 × C2 + 13.7 × C8 (r2 = 0.98) were acceptable. The %MPE and %MAPE values obtained from the validation group for the two model equations were 5.89 ± 14.5% and 12.1 ± 9.53%, and − 1.30 ± 4.40% and 3.28 ± 3.11%, respectively.

Conclusions

The LSS models that included C0 and C4 or C0, C2, and C8 in the estimation of AUC0–24 h for GCV had favorable performance and can be used for therapeutic drug monitoring in the prevention of CMV infection using VGCV in Chinese renal allograft recipients.

Keywords

Renal transplantation Valganciclovir (VGCV) Ganciclovir (GCV) Pharmacokinetics Limited sampling strategy Therapeutic drug monitoring 

Notes

Funding

This work was supported by the National Natural Science Foundation of China (Grant Number: 81473275) and Medical and Technology Intercrossing Research Foundation of Shanghai Jiao Tong University (Grant Number: YG2016MS60).

Compliance with ethical standards

The research was conducted in accordance with the ethical standards of the Helsinki Declaration. This study protocol was approved by the Ethics Committee of Rui-Jin Hospital, which is affiliated with the Shanghai Jiao-Tong University School of Medicine, and informed consent was obtained from each patient prior to the study.

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Center for Organ TransplantationRui-Jin Hospital, Shanghai Jiao-Tong University School of MedicineShanghaiPeople’s Republic of China
  2. 2.Department of PharmacyRui-Jin Hospital, Shanghai Jiao Tong University School of MedicineShanghaiPeople’s Republic of China

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