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作 者:张峻[1] 杨龙[1] 唐薇[1] 张瑛[2] 周琼[1] 宋贤[3]
机构地区:[1]昆明医学院第一附属医院药剂科,云南昆明650032 [2]昆明医学院第一附属医院儿科,云南昆明650032 [3]昆明医学院
出 处:《中国医院药学杂志》2007年第8期1061-1065,共5页Chinese Journal of Hospital Pharmacy
摘 要:目的:研究大剂量甲氨蝶呤(HDMTX)在儿童急性淋巴细胞白血病(ALL)患者中的群体药动学(PPK)特征。方法:96例患儿接受HDMTX(3g·m^-2)静脉滴注24h,收集24-68h左右稀疏血药浓度数据376个,采用荧光偏振免疫法(FPIA)测定MTX血药浓度。用NONMEM软件进行模型拟合和PPK参数的估算,并定量分析患几年龄、性别、体质量、体表面积、种族、水化量、碱化量等固定效应对甲氨蝶吟PPK参数的影响,得到最终回归模型。结果:PPK模型为:中央室清除率(CL1)=5.04×(1—0.356×GEND)×BSA^0.999+(OH1/100)^0.514(L·h^-1),中央室表观分布容积(V1)=16.1(L),外周室清除率(CL2)=0.203×(AGE/10)^1.56(L·h^-1),外周室表观分布容积(V2)=7.05×(AGE/10)^1.26(L),CL1、V1、CL2、V2的群体标准值(个体间RSD%)分别为5.04L·h^-1。(49.6%),16.1L(29.3g),0.203L·h^-1。(337.6%),7.05L(107.7%),其中性别、体表面积及给药前碱化量对CL,的影响具有统计学意义,年龄对CL2及V2的影响具有统计学意义(P〈0.01)。结论:本实验模型拟合情况较好,可为临床制定个体化给药方案、减少药物不良反应提供重要依据。OBJBCTTVE To evaluate the population pharmacokinetics of high-dose methotrexate (HDMTX) in children with acute lymphoblastic leukemia(ALL). METHODS Intravenous solution with HDMTX (3 g·m^-2) was given to 96 children with ALL,376 MTX plasma concentrations were measured mainly between 24 to 68 h after beginning the infusion,and fluorescence polarization immunoassay(FPIA)was used to determine MTX plasma concentrations. Population pharmacokinetics model and parameters were estimated by NONMEM software. The fixed effect factors, such as age,gender,body weight, body surface area, race, hydration and alkalization on pharmacokinetic parameters were evaluated and then obtained the final regression modie. RESULTS The following population parameters were obtained using a two-compartment model: CL1 (clearance of central compartment) = 5. 04 × ( 1 - 0. 356 ×GEND) ×BSA^11. 777 + (OH3/100)^0. 514 (L· h^-1 ) ,V1 (central volume) = 16. 1 (L), CL2 (clearance of peripheral compartment) = 0. 203 × (AGE/10) ^1.56 (L·h^-1 ), V2 (peripheral compartment) = 7. 05 × (AGE/10 )^1. 76 (L). The population pharmacokinetics parameters(RSD% ) of CL1, V1, CL2, V2 were 5. 04 L· h-1 (49. 6% ), 16. 1 L(29. 3 % ), 0. 203 L· h^-1 (337. 60% ), 7. 05 L( 107. 70% ) respectively. Gender, body surface area, the amount of alkaiization before MTX infusion had statistic influence on CL1 and age had statistic influence on CL2 and V2 (P〈0. 01 ). CONCLUSION A good fitness is derived from the PPK that could provide gist for MTX treatment and reduce adverse effects.
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