中国实用儿科杂志 ›› 2012, Vol. 27 ›› Issue (07): 517-52·.

• 论著 • 上一篇    下一篇

中国癫痫儿童左乙拉西坦群体药代动力学模型探讨

王颖慧1,王    丽1,卢    炜2,魏敏吉3,吴    晔1,尚德为2,王云秀1   

  1. 1.北京大学第一医院儿科,北京    100034;2.北京大学药学院,北京    100191;3.北京大学临床药理研究所,北京    100191
  • 出版日期:2012-07-06 发布日期:2012-07-18
  • 基金资助:

    首都医学发展科研基金[NO.2009-2021]

Population pharmacokinetic analysis of levetiracetam in Chinese children with epilepsy.     

   WANG Ying-hui*,WANG Li,LU Wei,WEI Min-ji,WU Ye,SHANG De-wei,WANG Yun-xiu. *Department of Pediatrics,Peking University First Hospital,Beijing 100034,China   

  • Online:2012-07-06 Published:2012-07-18

摘要:

目的    建立中国癫痫儿童左乙拉西坦(LEV)群体药代动力学(PPK)模型,指导临床合理用药。方法    分析2009年6月至2010年12月北京大学第一医院小儿神经门诊及病房收集的220例服用LEV癫痫患儿的250个LEV血药浓度数据,使用非线性混合效应模型(NONMEM)软件,按照一室一级吸收和消除模型,建立我国癫痫患儿LEV的PPK模型。使用正态化预测分布误差(NPDE)方法验证模型。结果    LEV PPK基础模型:清除率 (CL/F)=1.56 × EXP[ETA(1)] L/h,表观分布容积(V/F)被固定为20 L,吸收速率常数(KA)=EXP[ETA(3)] /h;最终模型:CL/F=[1.35×(体重/25.26)0.578]L/h,V/F=20 L,KA=2.11×EXP[ETA(3)]/h;CL/F、V/F和KA群体值分别为1.35 L/h、20 L和2.11/h。经过NPDE方法验证,所建立的最终模型有良好稳定性和预测效能。结论    本文建立了中国癫痫患儿LEV PPK模型,模型通过验证及预测效能,可用于指导临床用药。体重是对清除率影响最明显的协变量。

关键词: 左乙拉西坦, 群体药代动力学, 癫痫, 儿童

Abstract:

Objective    To establish a population pharmacokinetic(PPK)model of levetiracetam in Chinese children with epilepsy.Methods    A total of 250 data from 220 epileptic children were analyzed.Levetiracetam concentrations were determined by the HPLC method.PPK model of levetiracetam was established using NONMEM,a population pharmacokinetic computer program,according to one-compartment model with first-order absorption and elimination.To validate a model,the normalized prediction distribution errors(NPDE) method was used.Results    Regression equation of the base model of levetiracetam was obtained,ie,clearance(CL/F)=1.56×EXP [ETA(1)],volume of distribution(V/F)was fixed 20,and Ka = EXP[ETA(3)],and that of the final model was as follows:CL/F(L/h)=1.35×(WEIGHT/25.26)0.578,V/F(L)=20,KA(/h)=2.11×EXP[ETA(3)].The final PPK model was demonstrated to be stable and effective in the prediction of serum levetiracetam concentrations by NPDE.Conclusion    A one-compartment mixture model with first-order absorption adequately describes the levetiracetam concentrations.Weight is identified as a significant covariate on levetiracetam clearance in this study.

Key words: levetiracetam, population pharmacokinetics, epilepcy, children