富马酸替诺福韦二吡呋酯是atp结合盒亚家族C成员11的新底物。
文章的细节
-
引用
-
杜云红,C钦派萨,P帕蒙辛拉帕萨姆,S考基提猜
富马酸替诺福韦二吡呋酯是atp结合盒亚家族C成员11的新底物。
《Chemother》2017年3月24日;61(4)。pii: AAC.01725-16。doi: 10.1128 / AAC.01725-16。2017年4月印刷
- PubMed ID
-
28167562 (PubMed视图]
- 摘要
-
替诺福韦(Tenofovir disoproxil fumarate, TDF)是一种核苷酸逆转录酶抑制剂,转化为替诺福韦(Tenofovir, TFV)后主要通过肾小球滤过和肾小管分泌活性消除。替诺福韦的主要不良反应是肾毒性;然而,确切的机制仍然知之甚少。在本研究中,atp结合盒亚家族C成员11 (ABCC11;多药耐药蛋白8 [MRP8])转运体在近端小管细胞中丰富,被证明是替诺福韦的外排转运体。Real-time PCR (RT-PCR)和间接免疫荧光检测MRP8在连续细胞系中的过表达。通过细胞毒性、细胞转运和囊泡摄取测定来评估替诺福韦的累积。使用mrp特异性抑制剂MK-571和已知底物甲氨蝶呤确认底物特异性。采用液相色谱-串联质谱法(LC-MS/MS)测定替诺福韦细胞内和囊泡内浓度。TDF在mrp8过表达细胞中的50%细胞毒浓度(CC50)是亲本细胞的4.78倍。 Transport assays also showed that the intracellular accumulation of tenofovir in MRP8-overexpressing cells was 55 times lower than that in parental cells and was partly reversed by MK-571. Similarly, an "inside-out" vesicular uptake assay, using Sf9 inverted membrane vesicles to allow measuring of accumulation of the substrates into the vesicles, demonstrated a higher intravesicular concentration of tenofovir in MRP8-overexpressing vesicles than in Sf9 insect control vesicles. These effects were effectively reversed by increasing concentrations of the specific inhibitor MK-571. In conclusion, tenofovir is a new substrate of the MRP8 transporter. An alteration in the activity of this efflux pump may increase the intracellular accumulation of tenofovir in proximal renal tubular cells.
引用本文的药物库数据
- 药物转运蛋白
-
药物 转运体 种类 生物 药理作用 行动 替诺福韦disoproxil 多药耐药相关蛋白4 蛋白质 人类 未知的底物细节