氟苯尼考在大黄鱼体内的药动学及组织分布研究

Pharmacokinetics and Tissue Distribution of Florfenicol in Large Yellow Croakers,Pseudosciaena crocea

在试验水温(25±1)℃时,按20mg/kg剂量给大黄鱼(Pseudosciaena crocea)单次口灌氟苯尼考后,采用高效液相色谱法测定了血浆、肌肉、肝脏和肾脏各组织中的药物浓度,并对其进行了药代动力学及组织分布特征的研究。结果表明,大黄鱼血浆中氟苯尼考的药时数据可用一级吸收一室开放模型来描述,其药动学方程为:C血液=43.365(e-0.047t-e-0.266t),而肌肉、肝脏和肾脏各组织均符合一级吸收二室开放模型,其药动学方程分别为:C肌肉=2.216e?1.732t+0.093e-0.007t-2.309e-2.212t、C肝脏=48.913e?6.334t+0.773e-0.022t-49.686e-30.928t、C肾脏=14.709e?1.558t+0.167e-0.010t-14.876e-1.880t。大黄鱼对氟苯尼考的代谢与分布具有明显的组织特异性,肌肉中的药物浓度低于同期其它组织。肌肉作为鱼类最主要的可食性组织,建议将其作为该药残留监控的靶组织,相应的休药期至少为4d。

In order to study the pharmacokinetics and tissue distribution of florphenicol in Pseudosciaena crocea,after single oral administration at a dose of 20 mg/kg fish at (25±1)℃. We determined the concentrations of florfenicol in plasma,muscle,liver,kidney of Pseudosciaena crocea by high performance liquid chromatography (HPLC) .The results showed that the concentration-time data of florfenicol in plasma were in accordance with one-compartment open model with first-order absorption,which could be described with...