八宝素在Beagle犬体内药代动力学

目的研究八宝素在Beagle犬体内的药代动力学。方法用高效液相色谱法，以蒽为内标，苯甲酰氯为衍生剂，甲醇-水(64∶36)为流动相，测定一次性静脉注射10.6和21.3 mg·kg^-1八宝素后，Beagle犬血液中八宝素的含量。采用3P97程序计算药物代谢动力学参数。结果八宝素iv在Beagle犬体内的药代动力学符合二室开放模型，两剂量组t^1/2α为2.3和2.1 min， t_1/2β分别为1.9和2.0 h， v_s均为0.54 L·kg^-1， AUC分别为1.8和4.1 g·min·L^-1，CL分别为0.004 8和0.005 6 L·kg^-1·min^-1。结论八宝素在Beagle犬体内分布和消除较快,呈一级动力学特征。

Pharmacokinetics of hylotelephin in Beagle dogs

AIM: To investigate the pharmacokinetics of hylotelephin in Beagle dogs and obtain the main pharmacokinetic parameters. METHODS: An HPLC method with UV detection was developed to study the pharmacokinetics of hylotelephin in dogs by joining an internal standard (anthracene). Benzoyl chloride was used to the pre-column derivatization of hylotelephin and methanol-water (64:36) was used as the mobile phase. According to the 3P97 pharmacokinetic program, the main parameters were calculated. RESULTS: The hylotelephin pharmacokinetics conforms to a two-compartment open model after a single iv dose of hylotelephin 10.6 or 21.3 mg x kg(-1) in Beagle dogs. The parameters of two groups were as follows: T(1/2) alpha were 2.3 and 2.1 min, T(1/2) beta were 1.9 and 2.0 h, K12 were 0. 12 and 0.11 min, K21 were 0.17 and 0.21 min, K10 were 0.011 and 0.0094 min, Vc were 0.54 and 0.54 L x kg(-1), AUC were 1.8 and 4.1 g x min x L(-1), CL were 0.0048 and 0.0056 L x kg(-1) x min(-1), MRT were 2.10 and 2.4 h, respectively. CONCLUSION: The pharmacokinetics of hylotelephin after iv administration showed a rapid distribution and elimination process in Beagle dogs and was of first order kinetics.