目的了解重组病毒巨噬细胞炎性蛋白(vMIP)在SD大鼠体内的药动学及组织分布。方法对vMIP进行碘标、分离纯化和鉴定,然后利用其进行药动学实验。采用同位素示踪法测量vMIP在SD大鼠体内的药动学,并检测其在大鼠组织中的分布。结果60,240μg·kg^-12个剂量组(静脉注射给药)的主要药动学参数分别为Pmax(249.4±84.50),(887.01±204.22)μg·L^-1;t1/2β(1.5±0.28),(2.65±0.85)h;AUC0-∞(136.0±40.70),(493.84±49.42)μg·h·L^-1。tmax10.0min。结论vMIP进入大鼠体内主要分布在肝和肺,在体内消除较快,其动力学特征符合一级吸收二室开放模型。
OBJECTIVE To investigate the pharmacokinetics and tissue distribution of recombinant vMIP in SD rats. METH-ODS The vMIP was prepared by radioiodine label,then separated,purified and identified with the 125I-vMIP. The 12SI-vMIP was determined and tissue distribution of vMIP was discribed in SD rats. RESULTS The main pharmacokinetic parameters of the low, middle ( 60 μg·kg^-1 ) and high dosage ( 240 μg·kg^-1 ) groups ( after intra-venous administration) were as follow:Pmax ( 249.4 ± 84. 50 ), ( 887.01 ± 204. 22 ) μg·L^-1 ; t1/2β ( 1.5 ± 0. 28 ), ( 2. 65 ± 0. 85 ) h ; AUC0-∞ ( 136. 0 ± 40. 70 ), (493. 84 ± 49. 42 ) μg·h·L^-1. tmax 10. 0 min. CONCLUSION vMIP was distributed mostly in lung and liver. The vMIP was eliminated rapidly in rats. The pharmacokinetic profile was described by a 2-compartment open model with the first order absorption.