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Small Molecule Modulators of Copper-Induced Aβ Aggregation
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Our design of bifunctional metal chelators as chemical probes and potential therapeutics for Alzheimer's disease (AD) is based on the incorporation of a metal binding moiety into structural frameworks of Abeta aggregate-imaging agents. Using this strategy, two compounds 2-[4-(dimethylamino)phenyl]imidazo[1,2-a]pyridine-8-ol (1) and N(1),N(1)-dimethyl-N(4)-(pyridin-2-ylmethylene)benzene-1,4-diamine (2) were prepared and characterized. The bifunctionality for metal chelation and Abeta interaction of 1 and 2 was verified by spectroscopic methods. Furthermore, the reactivity of 1 and 2 with Cu(II)-associated Abeta aggregates was investigated. The modulation of Cu(II)-triggered Abeta aggregation by 1 and 2 was found to be more effective than that by the known metal chelating agents CQ, EDTA, and phen. These studies suggest a new class of multifunctional molecules for the development of chemical tools to unravel metal-associated events in AD and potential therapeutic agents for metal-ion chelation therapy.
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“In this context, two approaches have been pursued in BFC design. 31,49–58 One strategy is based on the direct incorporation of metal-binding atom donors into the structural framework of an Aβ-interacting compoud (Scheme 1, approach A), and the other involves linking the metal-chelating and Aβ-binding molecular fragments (Scheme 1, approach B).”
From Bifunctional Compounds for Controlling Metal-Mediated Aggregation of the Aβ42Peptide (2012) · cites this paper as [51]
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“By comparison, the clinically tested compound CQ shows <30% cell survival at concentrations >2 μM, while EDTA shows 90–95% cell survival up to 20 μM concentration (Figure S26).51,52”
From Bifunctional Compounds for Controlling Metal-Mediated Aggregation of the Aβ42Peptide (2012) · cites this paper as [51]
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“Except for one recent report,99 compounds that inhibit metal-mediated Aβ40 aggregation or promote disaggregation of amyloid fibrils were shown to lead to increased cell viability.49,51,52”
From Bifunctional Compounds for Controlling Metal-Mediated Aggregation of the Aβ42Peptide (2012) · cites this paper as [51]
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“However, the majority of these BFCs have been studied for their effect on aggregation of the Aβ40 peptide,25,31 and fewer studies have focused on their interaction with the more neurotoxic Aβ42 peptide.20,21”
From Small Bifunctional Chelators That Do Not Disaggregate Amyloid β Fibrils Exhibit Reduced Cellular Toxicity (2014) · cites this paper as [31]
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“Compounds that inhibit metal-mediated Aβ40 aggregation or promote disaggregation of amyloid fibrils were shown to lead to increased cell viability.25,31,32”
From Small Bifunctional Chelators That Do Not Disaggregate Amyloid β Fibrils Exhibit Reduced Cellular Toxicity (2014) · cites this paper as [31]
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“the clinically tested compound CQ was quite toxic to cells even at 2 μM concentration, while EDTA does not show any toxicity up to 20 μM.25,31”
From Small Bifunctional Chelators That Do Not Disaggregate Amyloid β Fibrils Exhibit Reduced Cellular Toxicity (2014) · cites this paper as [31]
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“Since metal-Aβ species have been shown to be neurotoxic,25,51,92”
From Bifunctional Compounds for Controlling Metal-Mediated Aggregation of the Aβ42Peptide (2012) · cites this paper as [51]
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“Thus, the use of both these methods provides a more complete picture of the extent and pathways of Aβ aggregation under various conditions.51,52”
From Bifunctional Compounds for Controlling Metal-Mediated Aggregation of the Aβ42Peptide (2012) · cites this paper as [51]
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“Because Cu2+–Aβ species have been shown to be neurotoxic,20,21,31,51,52”
From Small Bifunctional Chelators That Do Not Disaggregate Amyloid β Fibrils Exhibit Reduced Cellular Toxicity (2014) · cites this paper as [31]
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Metadata
- Authors
- Hindo, S. S., Mancino, A. M., Braymer, J. J., Liu, Y., Vivekanandan, S., Ramamoorthy, A., & Lim, M. H.
- Affiliations
- University of Michigan (US)
- Department of Chemistry and the Life Sciences Institute, Biophysics and Department of Chemistry, University of Michigan, Ann Arbor, Michigan, 48109
- Corresponding author
- Lim, Mi Hee
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-10-30
- Volume
- 131
- Issue
- 46
- Pages
- 16663-16665
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- PMC
- PMC3417132
- OpenAlex
- W1976544813
- Cited by
- 203
- References
- 34
- Citations by year
- 2026: 6 · 2025: 5 · 2024: 6 · 2023: 6 · 2022: 10 · 2021: 7 · 2020: 12 · 2019: 8 · 2018: 14 · 2017: 11 · 2016: 12 · 2015: 14 · 2014: 20 · 2013: 21 · 2012: 22
- FWCI
- 11.30
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Journal of the American Chemical Society (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Scholarworks@UNIST (Ulsan National Institute of Science and Technology) (submittedVersion)
- Funders
- National Institutes of Health
- National Institute of Diabetes and Digestive and Kidney Diseases (R21DK078885, DK078885)
- Topics
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Alzheimer's disease research and treatments
- Physical Sciences › Chemistry › Spectroscopy › Molecular Sensors and Ion Detection
- Health Sciences › Medicine › Pharmacology (medical) › Cholinesterase and Neurodegenerative Diseases
- Keywords
- Alzheimer's disease, amyloid-beta aggregation, copper(II) ions, metal chelators, chemical probes, chelation therapy, imidazo[1,2-a]pyridines, benzene-1,4-diamine, copper chelation
- MeSH terms
- Alzheimer Disease, Chelating Agents, Copper, Humans, Imidazoles, Phenylenediamines, Pyridines, Drug Design, Amyloid beta-Peptides, Cell Line, Tumor
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