Distinct Spacing Between Anionic Groups: An Essential Chemical Determinant for Achieving Thiophene-Based Ligands to Distinguish β-Amyloid or Tau Polymorphic Aggregates
作者:Therése Klingstedt、Hamid Shirani、Jasmin Mahler、Bettina M. Wegenast-Braun、Sofie Nyström、Michel Goedert、Mathias Jucker、K. Peter R. Nilsson
DOI:10.1002/chem.201500556
日期:2015.6.15
or tau aggregates present in transgenic mice at distinct ages. The ability of the ligand to spectrally distinguish between the aggregated morphotypes was reduced when the spacing between the anionic substituents along the conjugated thiophene backbone was altered, which verified that specific molecular interactions between the ligand and the proteinaggregate are necessary to detect aggregate polymorphism
蛋白质聚集体的积累与许多破坏性神经退行性疾病有关,并且已经提出存在不同的聚集形态型来解释这些疾病报告的异质表型。因此,开发能够区分这些形态类型的分子探针是必不可少的。我们报告了一种阴离子四聚体低聚噻吩化合物,可用于对不同年龄的转基因小鼠中存在的不同形态的 β-淀粉样蛋白或 tau 聚集体进行光谱分配。当沿着共轭噻吩骨架的阴离子取代基之间的间距改变时,配体在光谱上区分聚集形态类型的能力降低,这证实了配体和蛋白质聚集体之间的特定分子相互作用是检测聚集体多态性所必需的。我们的研究结果为开发新的荧光配体提供了结构和功能基础,这些配体可以区分不同形态的蛋白质聚集体。