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作 者:王睿莹[1] 吴吉芹[1] 邵堃[2] 蒋晨[2] 王璇[1] 娄晋宁[3] 朱利平[1] 翁心华[1]
机构地区:[1]复旦大学附属华山医院感染科,上海200040 [2]复旦大学药学院 [3]卫生部中日友好医院临床医学研究所
出 处:《中华传染病杂志》2012年第8期449-453,共5页Chinese Journal of Infectious Diseases
基 金:上海市自然科学基金资助项目
摘 要:目的探讨P-糖蛋白抑制剂对两性霉素B(AraB)血脑屏障转运的影响。方法应用小鼠脑血管内皮细胞建立体外血脑屏障模型,选取维拉帕米作为P一糖蛋白抑制剂,AmB作为受试底物,经细胞毒性实验选定合适的温育时间及药物浓度,分别进行不同时间点的AraB细胞摄取实验及不同维拉帕米浓度的AraB细胞摄取实验。组间均数比较采用单因素方差分析,均数两两比较采用Bonferroni检验。结果AraB的血脑屏障转运随时间延长不断积累,与同一时间点对照组相比,抑制剂组在90rain(t=6.753,P=0.001)、120min(t=3.574,P=0.016)、150min(t=4.759,P=0.005)处AraB细胞摄取水平明显升高,其余时间点两组间差异无统计学意义。与阴性对照组相比,ArnB细胞摄取水平在不同浓度维拉帕米组(2、5、10、50、75和100μmol/L)均有显著提高(P=0.000、0.014、0.000、0.014、0.000、0.000),且随维拉帕米浓度升高增加幅度更明显。结论P=糖蛋白抑制剂维拉帕米可提高脑毛细血管内皮细胞对Arab的摄取作用,提示P-糖蛋白参与血脑屏障AraB的转运。Objective To determine the influence of P-glycoprotein (P gp) inhibitor on the blood brain barrier (BBB) transport of amphotericin B (AmB).- Methods An in-vitro BBB model was established with brain capillary endothelia cells (BCEC). AmB was chosen as the test drug and verapamil was chosen as the inhibitor of P-gp. Cellular uptake of AmB at different time points and with series of verapamiI concentrations were performed respectively after the determination of appropriate incubation time and drug dosage by the cytotoxicity assay. The AmB concentrations of series of samples were detected using high performance liquid chromatography (HPLC) method. One-way ANOVA analysis and Bonferroni test were used for data analysis. Results The cellular transport of AmB was accumulated as the time prolonged. The inhibitor group had a significant higher cellular uptake levels of AmB at the time point of 90 rain (t=6. 753, P=0. 001), 120 min (t=3. 574, P= 0. 016) and 150 min (t=4. 759, P=0. 005) as compared with the control group. The AmB cellular uptake level increased significantly when BCEC were incubated with verapamil of 2 μmol/L (P =0. 000), 5 μmol/L (P=0. 014), 10 μmol/L (P=0. 000), 50 μmol/L (P=0. 014), 75 μmol/L (P= 0. 000) and 100 μmol/L (P=0. 000), respectively, compared with the control group. Conclusion The P-gp inhibitor verapamil can enhance the cellular uptake of Arab which indicates that P-gp is involved in the BBB transport of AmB.
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