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