對乙酰氨基酚在大鼠血液與額葉皮層中藥動學(xué)研究
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本文關(guān)鍵詞:對乙酰氨基酚在大鼠血液與額葉皮層中藥動學(xué)研究 出處:《皖南醫(yī)學(xué)院》2014年碩士論文 論文類型:學(xué)位論文
更多相關(guān)文章: 對乙酰氨基酚 微透析 藥動學(xué) 大鼠 高效液相色譜
【摘要】:目的:以微透析采樣技術(shù)和傳統(tǒng)采樣方法研究對乙酰氨基酚在大鼠額葉皮層細胞外液和血液中藥動學(xué)過程,比較兩種方法所得主要藥動學(xué)參數(shù)之間的區(qū)別與聯(lián)系,探討靶器官藥動學(xué)研究方法。 方法:①微透析技術(shù)采樣法:大鼠腹腔注射烏拉坦麻醉后,使其頭部固定在腦立體定位儀上,將微透析探針植入額葉皮層,以2μL/min速率向微透析探針灌注人工腦脊液。穩(wěn)定一小時后,,大鼠腹腔注射對乙酰氨基酚(200mg/kg),注射容量為0.5mL/100g。注射完畢后,立即收集額葉皮層細胞外液透析液樣本,收集時間間隔為12min,連續(xù)收集6h,樣本于-40℃冰箱中保存待測。②血漿樣本采樣法:大鼠腹腔注射烏拉坦麻醉后,手術(shù)分離頸總動脈、插管,以備取血使用。穩(wěn)定一小時后,腹腔注射對乙酰氨基酚(200mg/kg),注射容量為0.5mL/100g。分別在給藥后0.08h、0.25h、0.5h、0.75h、1.0h、2.0h、4.0h和6.0h,經(jīng)動脈插管用抗凝管取血300μL,制備HPLC檢測樣本,樣本于-40℃冰箱中保存待測。用HPLC-紫外檢測法測定上述兩種方法所得樣本的對乙酰氨基酚濃度,用DAS藥動學(xué)軟件擬合藥物濃度-時間曲線,并計算藥動學(xué)參數(shù)。 結(jié)果:對乙酰氨基酚在大鼠血液和額葉皮層細胞外液中的變化均呈一室開放模型,其主要藥動學(xué)參數(shù)t1/2、Tmax、Cmax和AUC0-∞,在①血液中為(1.20±0.30)h、(0.58±0.13)h、(129.45±34.08)μg/mL、(361.36±92.44)μg/mL*h,②額葉皮層細胞外液中為(1.95±0.59)h、(1.26±0.22)h、(15.19±3.17)μg/mL、(77.38±22.39)μg/mL*h。與血漿相比,對乙酰氨基酚在額葉皮層細胞外液中的Cmax和AUC0-∞均顯著降低(P 0.01),而t1/2、Tmax明顯延長(P 0.05或P 0.01)。 結(jié)論:①對乙酰氨基酚在大鼠血液及大腦額葉皮層細胞外液中的變化過程均呈一室開放模型。②對乙酰氨基酚在額葉皮層細胞外液中的Cmax和AUC0-∞較血液中均顯著降低,而t1/2、Tmax則明顯延長。③本實驗建立了一種應(yīng)用微透析采樣技術(shù)研究藥物在靶器官——大鼠額葉皮層藥動學(xué)過程的方法,該方法操作簡單、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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