A Redox-Active Fluorescent pH Indicator for Detecting <i>Plasmodium falciparum</i> Strains with Reduced Responsiveness to Quinoline Antimalarial Drugs
作者:Mouhamad Jida、Cecilia P. Sanchez、Karène Urgin、Katharina Ehrhardt、Saravanan Mounien、Aurelia Geyer、Mourad Elhabiri、Michael Lanzer、Elisabeth Davioud-Charvet
DOI:10.1021/acsinfecdis.5b00141
日期:2017.2.10
and -resistant parasite strains. NBD derivatives were found to act as redox cyclers of two essential targets, using a coupled assay based on methemoglobin and the NADPH-dependent glutathione reductase (GRs) from P. falciparum. This redox activity is proposed to contribute to the dual action of Fluo-CQ on redox equilibrium and methemoglobin reduction via PfCRT-mediated drug efflux in the cytosol and then
恶性疟原虫氯喹抗性转运蛋白(Pf CRT)的突变已与对多种生物活性化合物(包括当前和以前的喹啉和喹啉类抗疟药)的不同反应相关。Pf CRT通过充当转运系统,从寄生虫的消化液中排出药物,这些药物至少发挥了其抗疟原虫活性的一部分,从而改变了药物的反应能力。为了保持这些珍贵药物的功效,对于携带突变Pf CRT变异体的寄生虫菌株的流行病学调查以及旨在抑制或规避Pf作用的药物开发计划,需要新颖的功能工具CRT。在这里我们报告的合成和表征的pH敏感的荧光氯喹类似物组成的7-氯-N- 2-[((丙-2-基)氨基]乙基]喹啉-4-胺被荧光染料7-硝基苯并呋喃官能化(NBD)(以下称为Fluo-CQ)。在寄生虫中,Fluo-CQ积聚在消化液中,产生强荧光信号,但仅在携带野生型Pf CRT的寄生虫中产生。在携带突变型Pf CRT的寄生虫中,Fluo-CQ不会积累。荧光探针的差异处理与活细胞成像相结合,为快速