Use of a benzimidazole derivative BF-188 in fluorescence multispectral imaging for selective visualization of tau protein fibrils in the alzheimer's disease brain

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31 Citations (Scopus)

Abstract

Purpose: Selective visualization of amyloid-β and tau protein deposits will help to understand the pathophysiology of Alzheimer's disease (AD). Here, we introduce a novel fluorescent probe that can distinguish between these two deposits by multispectral fluorescence imaging technique. Procedures: Fluorescence spectral analysis was performed using AD brain sections stained with novel fluorescence compounds. Competitive binding assay using [ 3H]-PiB was performed to evaluate the binding affinity of BF-188 for synthetic amyloid-β (Aβ) and tau fibrils. Results: In AD brain sections, BF-188 clearly stained Aβ and tau protein deposits with different fluorescence spectra. In vitro binding assays indicated that BF-188 bound to both amyloid-β and tau fibrils with high affinity (K i < 10 nM). In addition, BF-188 showed an excellent blood-brain barrier permeability in mice. Conclusion: Multispectral imaging with BF-188 could potentially be used for selective in vivo imaging of tau deposits as well as amyloid-β in the brain.

Original languageEnglish
Pages (from-to)19-27
Number of pages9
JournalMolecular Imaging and Biology
Volume16
Issue number1
DOIs
Publication statusPublished - 2014 Feb

Keywords

  • Alzheimer's disease
  • Fluorescent probes
  • Multispectral fluorescence imaging
  • Neurofibrillary tangles
  • Senile plaques

ASJC Scopus subject areas

  • Oncology
  • Radiology Nuclear Medicine and imaging
  • Cancer Research

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