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Updated: Apr 27, 2026
06:17
A11-positive β-amyloid Oligomer Preparation and Assessment Using Dot Blotting Analysis
Published on: May 22, 2018
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Modulation of amyloid-β aggregation by histidine-coordinating Cobalt(III) Schiff base complexes
Marie C Heffern1, Pauline T Velasco, Lauren M Matosziuk
1Departments of Chemistry, Molecular Biosciences, Neurobiology, Biomedical Engineering, and Radiology, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208-3113 (USA).
Chembiochem : a European Journal of Chemical Biology
|June 26, 2014
Summary
Cobalt(III) Schiff base complexes show promise for Alzheimer's disease (AD) therapy by interacting with amyloid-beta (Aβ) peptides. These complexes reduce Aβ toxicity and synaptic binding, offering a potential new treatment strategy.
Area of Science:
- Neuroscience
- Biochemistry
- Medicinal Chemistry
Background:
- Oligomers of the amyloid-beta 42 (Aβ42) peptide are key neurotoxins implicated in Alzheimer's disease (AD) pathogenesis.
- Histidine residues at the N-terminus of Aβ42 are critical for metal-ion binding, promoting Aβ oligomerization and oxidative damage, and facilitating synaptic interactions.
Purpose of the Study:
- To evaluate the therapeutic potential of Cobalt(III) Schiff base (Co-sb) complexes in modulating Aβ toxicity.
- To investigate the interaction mechanism between Co-sb complexes and Aβ peptides, specifically targeting N-terminal Histidine residues.
Main Methods:
- High-performance liquid chromatography-mass spectrometry (HPLC-MS)
- Nuclear Magnetic Resonance (NMR) spectroscopy
- Fluorescence spectroscopy
- Density Functional Theory (DFT) calculations
Main Results:
- Co-sb complexes demonstrated interaction with Histidine residues in a truncated Aβ16 peptide, representing the Aβ42 N-terminus.
- Coordination of Co-sb complexes induced structural alterations in Aβ42 peptides, leading to the formation of large, soluble oligomers.
- This structural modification correlated with a significant reduction in Aβ synaptic binding to hippocampal neurons.
Conclusions:
- Co-sb complexes effectively interact with Aβ peptides and modulate their structure and function.
- The observed reduction in synaptic binding suggests a potential mechanism for mitigating Aβ-induced neurotoxicity.
- Co-sb complexes represent promising therapeutic candidates for developing novel anti-Alzheimer's disease strategies.
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