Pharmacokinetics of Ivermectin in Salvelinus leucomaenis Following Two Ways of Administration

2种给药方式下伊维菌素在白点鲑体内的药动学研究（英文）

[Objective] This study was aimed to study the pharmacokinetics of iver- mectin in Salvelinus leucomaenis following a single oral administration or intraperi- toneal injection. [Method] After a single oral administration or intraperitoneal injection of ivermectin with a dosage of 0.3 mg/kg body weight, samples were taken at dif- ferent time points and determined by high-performance liquid chromatography-ultravi- olet detection （HPLC-UV）. The pharmacokinetic parameters were calculated by 3p97 software. [Result] The concentration-time relations of ivermectin in plasma, muscle, liver and kidney were well described by one-department open model with first-order absorption. After oral administration, the pharmacokinetic parameters in plasma were as follows： Tmax=4.503 h, Cmax=0.252mg/L, t1/2ka=0.476 h, t1/2ka=331.160 h, AUC=121.524 （mg/L） .h. After intraperitoneal injection, the pharmacokinetic parameters in plasma were as follows： Tmax=2.751 h, Cmax=0.230 mg/L, t1/2ka=0.306 h, t1/2ka=153.868 h, AUC= 51.689 （mg/L） .h. [Conclusion] There were differences in the pharmacokinetics of ivermectin in Salvelinus leucomaenis between two different administration routes, and intraperitoneal injection led to more rapid absorption than oral administration.

[目的]研究伊维菌素在白点鲑体内的药动学。[方法]对白点鲑以0.3 mg/kg的剂量分别单次口灌和腹腔注射伊维菌素,采用高效液相色谱-紫外检测法(HPLC-UV)于给药后不同时间点连续进行采样检测,通过3p97软件分析药动学参数。[结果]在2种给药方式下,伊维菌素在血浆、肌肉、肝和肾中的药时关系均符合一级吸收一室开放模型。口灌给药方式下,血浆中药动学参数为Tmax=4.503 h、Cmax=0.252 mg/L、t1/2ka=0.476 h、t1/2ke=331.160h、AUC=121.524(mg/L)·h;腹腔注射给药方式下,血浆中药动学参数为Tmax=2.751 h、Cmax=0.230 mg/L、t1/2ka=0.306 h、t1/2ke=153.868 h、AUC=51.689(mg/L)·h。[结论]两种给药方式下伊维菌素在白点鲑体内的药动学存在差异,腹腔注射给药比口灌给药吸收快。