Evaluation of N, O-Benzamide difluoroboron derivatives as near-infrared fluorescent probes to detect β-amyloid and tau tangles
作者:Yimin Chen、Qingwen Ouyang、Yuying Li、Qi Zeng、Bin Dai、Yi Liang、Baian Chen、Hongwei Tan、Mengchao Cui
DOI:10.1016/j.ejmech.2021.113968
日期:2022.1
the brain tissue from AD patients. 4PmNO-2, with significantly enhanced fluorescence (Aβ1–42, 136 fold; Tau (K18), 96 fold) and the highest initial brain uptake (11.57% ID/g at 2 min) in normal ICR mice, was evaluated further. In vivo NIR fluorescent imaging studies in living Aβ and Tau transgenic mice revealed that it could differentiate healthy and diseased animals. Further ex vivo fluorescent staining
β-淀粉样蛋白 (A β ) 斑块和 Tau 缠结是对诊断和预防阿尔茨海默病 (AD) 至关重要的认知障碍标志物。为了系统探索氮原子的数量或位置与其光学性质和生物学性质之间的关系,引入了五个系列的新型N,O-配位有机二氟硼探针作为Aβ斑块和Tau缠结的结合支架。这些探头表现出适合近红外 (NIR) 成像的光学特性。探针4PmNO-2 (4-((1 E ,3 E )-4-(1,1-difluoro-1 H -1λ 4 ,9λ 4 -pyrimido [1,6-c ][1,3,5,2]oxadiazaborinin-3-yl)buta-1,3-dien-1-yl) -N , N -dimethylaniline ) 显示出优异的发射最大值(PBS 中 716 nm),量子产率(CH 2 Cl 2中为 61.4% ),对合成 A β 1-42 ( K d = 23.64 ± 1.08 nM) 和