对乙酰氨基酚在大鼠血液与额叶皮层中药动学研究
发布时间:2018-01-18 07:21
本文关键词:对乙酰氨基酚在大鼠血液与额叶皮层中药动学研究 出处:《皖南医学院》2014年硕士论文 论文类型:学位论文
更多相关文章: 对乙酰氨基酚 微透析 药动学 大鼠 高效液相色谱
【摘要】:目的:以微透析采样技术和传统采样方法研究对乙酰氨基酚在大鼠额叶皮层细胞外液和血液中药动学过程,比较两种方法所得主要药动学参数之间的区别与联系,探讨靶器官药动学研究方法。 方法:①微透析技术采样法:大鼠腹腔注射乌拉坦麻醉后,使其头部固定在脑立体定位仪上,将微透析探针植入额叶皮层,以2μL/min速率向微透析探针灌注人工脑脊液。稳定一小时后,,大鼠腹腔注射对乙酰氨基酚(200mg/kg),注射容量为0.5mL/100g。注射完毕后,立即收集额叶皮层细胞外液透析液样本,收集时间间隔为12min,连续收集6h,样本于-40℃冰箱中保存待测。②血浆样本采样法:大鼠腹腔注射乌拉坦麻醉后,手术分离颈总动脉、插管,以备取血使用。稳定一小时后,腹腔注射对乙酰氨基酚(200mg/kg),注射容量为0.5mL/100g。分别在给药后0.08h、0.25h、0.5h、0.75h、1.0h、2.0h、4.0h和6.0h,经动脉插管用抗凝管取血300μL,制备HPLC检测样本,样本于-40℃冰箱中保存待测。用HPLC-紫外检测法测定上述两种方法所得样本的对乙酰氨基酚浓度,用DAS药动学软件拟合药物浓度-时间曲线,并计算药动学参数。 结果:对乙酰氨基酚在大鼠血液和额叶皮层细胞外液中的变化均呈一室开放模型,其主要药动学参数t1/2、Tmax、Cmax和AUC0-∞,在①血液中为(1.20±0.30)h、(0.58±0.13)h、(129.45±34.08)μg/mL、(361.36±92.44)μg/mL*h,②额叶皮层细胞外液中为(1.95±0.59)h、(1.26±0.22)h、(15.19±3.17)μg/mL、(77.38±22.39)μg/mL*h。与血浆相比,对乙酰氨基酚在额叶皮层细胞外液中的Cmax和AUC0-∞均显著降低(P 0.01),而t1/2、Tmax明显延长(P 0.05或P 0.01)。 结论:①对乙酰氨基酚在大鼠血液及大脑额叶皮层细胞外液中的变化过程均呈一室开放模型。②对乙酰氨基酚在额叶皮层细胞外液中的Cmax和AUC0-∞较血液中均显著降低,而t1/2、Tmax则明显延长。③本实验建立了一种应用微透析采样技术研究药物在靶器官——大鼠额叶皮层药动学过程的方法,该方法操作简单、可靠。
[Abstract]:Objective: to study the pharmacokinetics of paracetamol in extracellular fluid and blood of frontal cortex of rats by using microdialysis sampling technique and traditional sampling method. The differences and relations between the main pharmacokinetic parameters obtained from the two methods were compared and the pharmacokinetic research methods of target organs were discussed. Methods the microdialysis technique sampling method: rats were anesthetized by intraperitoneal injection of uratan, and their heads were fixed on the brain stereotactic locator, and the microdialysis probe was implanted into the frontal cortex. Artificial cerebrospinal fluid (CSF) was infused with microdialysis probe at a rate of 2 渭 L / min. After one hour of stabilization, paracetamol was injected intraperitoneally into rats with 200 mg / kg of paracetamol. The injection volume was 0.5 mL / 100 g. Immediately after the injection, samples of extracellular dialysate from frontal cortex were collected. The interval of collection time was 12 minutes and the collection lasted 6 hours. The sample was stored in the refrigerator at -40 鈩
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