A Smart Near-Infrared Fluorescence Probe for Selective Detection of Tau Fibrils in Alzheimer’s Disease
作者:Yujin Seo、Kwang-su Park、Taewoong Ha、Mi Kyoung Kim、Yu Jin Hwang、Junghee Lee、Hoon Ryu、Hyunah Choo、Youhoon Chong
DOI:10.1021/acschemneuro.6b00174
日期:2016.11.16
novel, tau-selective smart near-infrared fluorescence (NIRF) probe was attempted by combining the previously identified core scaffold 3,5-dimethoxy-N,N-dimethylaniline-4-yl moiety, with the characteristic donor-π-acceptor architecture of the smart NIRF Aβ probes DANIR-2c and MCAAD-3. A series of compounds (2 and 3) were prepared, which were identified as “turn-on” NIRF probes for the visual detection
通过将先前确定的核心支架3,5-二甲氧基-N,N-二甲基苯胺-4-基部分与特征性供体-π-结合,尝试开发新型tau选择性智能近红外荧光(NIRF)探针。NIRFAβ探针DANIR-2c和MCAAD-3的受体结构。制备了一系列化合物(2和3),它们被识别为“开启” NIRF探针,用于目视检测tau聚集体和Aβ原纤维(λem = 650 nm,斯托克斯位移= 70–110 nm)。特别是3,5-二甲氧基-N,N-二甲基苯胺-4-基部分与MCAAD-3的供体部分的结合赋予了所得的探针3 g和3h,对tau聚集体具有显着的选择性(在Aβ上对tau的选择性分别为5.7和3.8);它们与tau聚集体结合时(FI tau = 49和108)显示出比与Aβ原纤维结合时(FIAβ = 9和28)更高的荧光强度。定量分析3g和3h的结合亲和力和荧光特性表明,微环境敏感的分子转子样行为,而不是对靶标的结合亲和力