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中国临床药理学与治疗学 ›› 2006, Vol. 11 ›› Issue (1): 45-50.

• 研究原著 • 上一篇    下一篇

洛美利嗪对大鼠脑微血管内皮细胞上 P-糖蛋白活力的影响 与 P-gp 及 mdr1 基因 mRNA 表达无关

吴玉林 ,马秉亮1 ,祝浩杰2 ,刘国卿2   

  1. 中国药科大学药学院生理学教研室 ,南京 210038 , 江苏 ;1上海中医药大学中药学院药理学教研室 , 上海 201203 ;2中国药科大学药学院药理学教研室 ,南京 210038 ,江苏
  • 收稿日期:2005-09-03 修回日期:2005-10-13 出版日期:2006-01-06 发布日期:2020-10-23
  • 通讯作者: WU Yu-lin , correspondence author , PhD, associate professor, master direc- tor , male, majoring in cardiovascular pharmacology . Tel:025-85230873 E-mail:wylcpu@yahoo.com .cn E-mail:wylcpu@yahoo.com .cn
  • 作者简介:WU Yu-lin , correspondence author , PhD, associate professor, master direc- tor , male, majoring in cardiovascular pharmacology . Tel:025-85230873 E-mail:wylcpu@yahoo.com .cn

Lomerizine inhibited the function of P-glycoprotein(P-gp) without decreasing the expression of mdr1 gene and P-gp in primarily cultured rat brain microvessel endothelial cells

WU Yu-lin ,MA Bing-liang1 ,ZHU Hao-jie2 ,LIU Guo-qing2   

  1. Department of Physiology , China Pharmaceutical University , Shenlong Road , Nanjing 210038 ,Jiangsu , China ; 1Department of Pharmacology , Shanghai University of Traditional Chinese Medicine , Cailun Road , Shanghai , 201203 ,China ; 2Department of Pharmacology , China Pharmaceutical University , Shenlong Road , Nanjing 210038 , Jiangsu , China
  • Received:2005-09-03 Revised:2005-10-13 Online:2006-01-06 Published:2020-10-23
  • Contact: WU Yu-lin , correspondence author , PhD, associate professor, master direc- tor , male, majoring in cardiovascular pharmacology . Tel:025-85230873 E-mail:wylcpu@yahoo.com .cn E-mail:wylcpu@yahoo.com .cn
  • About author:WU Yu-lin , correspondence author , PhD, associate professor, master direc- tor , male, majoring in cardiovascular pharmacology . Tel:025-85230873 E-mail:wylcpu@yahoo.com .cn

摘要: 目的 :研究洛美利嗪对原代培养的大鼠脑微 血管内皮细胞(RBMECs)上 P-糖蛋白(P-gp)功能和 表达的影响 。方法 :使用流式细胞术分析洛美利嗪 对 P-gp 底物-罗丹明 123(rhodamine123 , Rh123)在 RBMECs 中外排的影响 ,使用流式细胞术分析了洛 美利嗪对 RBMECs 上P-gp 表达的影响, 应用 RT-PCR 技术分析了洛美利嗪对 RBMECs mdr1 基因 mRNA 水平表达的影响 , 还使用Transwell 模型研究了洛美 利嗪对 Rh123 通透 RBMECs 单层细胞转运的影响 。 结果 :洛美利嗪通过抑制了 RBMECs 胞内 Rh123 的 外排;洛美利嗪对 P-gp 功能的影响与 RBMECs 上 P- gp 及 mdr1 基因 mRNA 表达无关 ;在 Transwell 模型 中 ,洛美利嗪还能显著增加 Rh123 跨 RBMECs 单层 细胞膜的、经上室至下室的转运 ,并抑制相反方向的 Rh123 的转运 。结论:洛美利嗪能显著地抑制 RB- MECs 上 P-gp 的活性 ,并对 P-gp 底物的跨细胞转运 产生影响。

关键词: P-糖蛋白 , 洛美利嗪 , 罗丹明 123 , 大鼠脑微 血管内皮细胞, 流式细胞术 , Transwell

Abstract: AIM:To study the effect of Lomerizine on the activity of P-glycorprotein (P-gp)in primary cul- tured rat brain microvessel endothelial cells (RBMECs). METHODS:Flow cytometry was used to study the efflux of rhodamine123 (Rh123)and expression of P-gp in RB- MECs.RT-PCR was used to measure the expression in mRNA level of mdr1 gene in RBMECs .Transwell model was used to detect the influence of Lomerizine on the transport of Rh123 through RBMECs monolayer.RE- SULTS :Lomerizine inhibited the efflux of Rh123 in RB- MECs.No changes of P-gp and mdr1 gene mRNA ex- pression were detected in RBMECs after the treatment with 30 μ mol·L -1 Lomerizine for 72 h .In the study of Transwell model , Lomerizine increased significantly the transport of Rh123 through RBMECs monolayer from up- per compartments to lower compartments, and inhibited obviously the transport in reverse direction .CONCLU- TION:The effect of Lomerizine on the activity of P-gp was mainly via its direct inhibitory effect on the function of P-gp in RBMECs and the transport of P-gp substrates in BBB may be affected by lomerizine.

Key words: P-glycoprotein ;Lomerizine ;rat brain microvessel endothelialcells ;flow cytometry ;transwell , rhodamine123

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