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Updated: Jul 7, 2026

A11-positive β-amyloid Oligomer Preparation and Assessment Using Dot Blotting Analysis
Published on: May 22, 2018
Isoindol-1,3-dione and isoindol-1-one derivatives with high binding affinity to beta-amyloid fibrils
Hyu Ji Lee1, Soo Jeong Lim, Seung Jun Oh
1Life Sciences Research Division, Korea Institute of Science and Technology, PO Box 131, Cheongryang, Seoul 130-650, Republic of Korea.
Abstract:
Based on the structural features of Indoprofen and PIB, a series of isoindol-1,3-diones 1a-k and isoindol-1-ones 2a-l were designed and synthesized. These 23 compounds were evaluated by competitive binding assay against aggregated Abeta42 fibrils using [(125)I]TZDM. All the isoindolone derivatives showed very good binding affinities with K(i) values in the subnanomolar range (0.42-0.94 nM). Among them, isoindol-1,3-diones 1i and 1k and isoindol-1-ones 2c and 2i exhibited excellent binding affinities (K(i)=0.42-0.44 and 0.46-0.49 nM) than those of Indoprofen (K(i)=0.52 nM) and PIB (K(i)=0.70 nM). These results suggest that isoindolones could be served as a scaffold for potential AD diagnostic probes to monitor Abeta fibrils.
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