摘要:
目的:研究重组水蛭素肠溶胶囊单次和多次给药在Beagle犬体内的药动学特征.方法:取12只Beagle犬按随机对照法分为单次ig组和单次iv组,每组6只,按0.2 mg/kg ig或iv重组水蛭素,收集血样;清洗2周后12只犬按0.2 mg/kg ig重组水蛭素,连续给药7 d,收集血样,作为多次ig组.采用酶联免疫吸附法测定血浆中重组水蛭素浓度,以DAS 2.0软件计算药动学参数.结果:单次ig和单次iv重组水蛭素在Beagle犬体内药动学特征均符合二室模型,ig重组水蛭素肠溶胶囊的绝对生物利用度为(14.908±1.868)%;单次ig组和多次ig组犬体内重组水蛭素的tpeak分别为(2.105±0.243)、(3.000±0.000)h,t1/2β分别为(8.660±2.965)、(14.870±2.710)h,cmax分别为(10.700±0.872)、(12.05±1.587)ng/mL,AUC0-1440 min分别为(55.250±4.386)、(58.978±6.002)ng·h/mL,两组间差异无统计学意义(P>0.05).结论:ig重组水蛭素肠溶胶囊可一定程度被吸收入血;连续多天ig重组水蛭素肠溶胶囊在犬体内不产生蓄积,不改变其药动学特征.%OBJECTIVE:To study the pharmacokinetic characteristics of Recombinant hirudin enteric-coated capsule by single and multiple administration in Beagle dogs. METHODS:12 Beagle dogs were divided into single ig group and single iv group by random control method,6 in each group. Recombinant hirudin 0.2 mg/kg was intragastrically administrated or intravenously inject-ed,blood sample was collected;after 2 weeks of cleaning,12 dogs were intragastrically administrated recombinant hirudin 0.2 mg/kg,for 7 d. Sample blood was collected,referred to multiple ig group. Recombinant hirudin concentration in plasma was deter-mined by enzyme-linked immunosorbent assay,and pharmacokinetic parameters were calculated by DAS 2.0 software. RESULTS:The results showed that pharmacokinetics by ig and iv recombinant hirudin in Beagle dogs fitted to two-compartment model,abso-lute bioavailability of ig Recombinant hirudin enteric-coated capsule was(14.908±1.868)%;the pharmacokinetic parameters in sin-gle ig group and multiple ig group were tpeak of(2.105±0.243),(3.000±0.000)h,t1/2β of(8.660±2.965),(14.870±2.710)h, cmax of(10.700±0.872),(12.05±1.587)ng/mL,AUC0-1440 min of(55.250±4.386),(58.978±6.002)ng·h/mL,without statistical significances in two groups(P>0.05). CONCLUSIONS:The ig Recombinant hirudin enteric-coated capsule can be absorbed into the blood to a certain extent. There is no accumulation for ig Recombinant hirudin enteric-coated capsule for several days,and it dose not change the pharmacokinetic characteristics.