Cited by 295Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchPrion Diseases and Protein Misfolding

Aluminium, iron, zinc and copper influence the in vitro formation of amyloid fibrils of Aβ42 in a manner which may have consequences for metal chelation therapy in Alzheimer's disease

House, Emily, Collingwood, Joanna, Khan, Ayesha, Korchazkina, Olga, Berthon, Guy, Exley, Christopher·2004·Journal of Alzheimer's Disease

Abstract

Metals are found associated with beta-pleated sheets of Abeta42 in vivo and may be involved in their formation. Metal chelation has been proposed as a therapy for Alzheimer's disease on the basis that it may safely dissolve precipitated Abeta peptides. We have followed fibrillisation of Abeta42 in the presence of an additional metal ion (Al(III), Fe(III), Zn(II), Cu(II)) over a period of 32 weeks and we have investigated the dissolution of these aged peptide aggregates in the presence of both desferrioxamine (DFO) and ethylenediaminetetraacetic acid (EDTA). Abeta42 either alone or in the presence of Al(III) or Fe(III) formed beta-pleated sheets of plaque-like amyloids which were dissolved upon incubation with either chelator. Zn(II) inhibited whilst Cu(II) prevented the formation of beta-pleated sheets of Abeta42and neither of these influences were affected by incubation of the aged peptide aggregates with either DFO or EDTA. Freshly prepared solutions of Abeta42 either alone or in the presence of added Al(III) or Fe(III) did not form beta-pleated amyloid in the presence of DFO when incubated for up to 8 weeks. EDTA did not prevent beta-pleated amyloid formation in the same treatments and promoted beta-pleated amyloid formation in the presence of either Zn(II) or Cu(II). The presence of significant concentrations of Al(III) and Fe(III) as contaminants of 'Abeta42 only' preparations suggested that both of these metals were involved in either triggering the formation or stabili…

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Crossref · 10.3233/jad-2004-6310

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  • Exley et al. showed that both sub- and superstoichiometric concentrations of Cu2+ prevent aggregation of Aβ42 into ThT-positive β-sheet-rich amyloid fibrils.

    “Exley et al. have used fluorescence assays and transmission electron microscopy (TEM) to show that both sub- and superstoichiometric concentrations of Cu2+ prevent aggregation of Aβ42 into thioflavin T (ThT)-positive β-sheet-rich amyloid fibrils.17−19”
  • Cu2+ by itself is not toxic to N2A cells, but the presence of Cu2+ and either monomeric Aβ42 or soluble Aβ42 oligomers exhibits enhanced cell toxicity.

    “while Cu2+ by itself is not toxic to N2A cells, the presence of Cu2+ and either monomeric Aβ42 or soluble Aβ42 oligomers exhibits enhanced cell toxicity.17,18”

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Authors
House, E., Collingwood, J., Khan, A., Korchazkina, O., Berthon, G., & Exley, C.
Affiliations
  • Keele University (GB)
  • Centre for Science and Technology in Medicine, Keele University, Staffordshire, UK
  • Université Toulouse III - Paul Sabatier (FR)
Corresponding author
Exley, Christopher
Venue
Journal of Alzheimer's Disease
Published
2004-06-03
Volume
6
Issue
3
Pages
291-301
ISSN
  • 1387-2877 (ISSN-L)
  • 1875-8908
OpenAlex
W1480108665
Cited by
294
References
0
Citations by year
2026: 3 · 2025: 5 · 2024: 8 · 2023: 6 · 2022: 8 · 2021: 17 · 2020: 15 · 2019: 20 · 2018: 16 · 2017: 16 · 2016: 9 · 2015: 16 · 2014: 8 · 2013: 15 · 2012: 27
FWCI
6.88
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Alzheimer s Disease (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute on Aging (R01 AG02030-01 A1)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Prion Diseases and Protein Misfolding
Keywords
amyloid-beta 42, metal ions
MeSH terms
Aluminum, Alzheimer Disease, Brain, Chromatography, High Pressure Liquid, Copper, Edetic Acid, Humans, Iron, Peptide Fragments, Zinc, Chelation Therapy, Amyloid beta-Peptides, In Vitro Techniques

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