Cited by 1,938Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

Aβ Oligomers – a decade of discovery

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Walsh, Dominic M., Selkoe, Dennis J.·2007·Journal of Neurochemistry

Abstract

Converging lines of evidence suggest that progressive accumulation of the amyloid β‐protein (Aβ) plays a central role in the genesis of Alzheimer’s disease, but it was long assumed that Aβ had to be assembled into extracellular amyloid fibrils to exert its cytotoxic effects. Over the past decade, data have emerged from the use of synthetic Aβ peptides, cell culture models, β‐amyloid precursor protein transgenic mice and human brain to suggest that pre‐fibrillar, diffusible assemblies of Aβ are also deleterious. Although the precise molecular identity of these soluble toxins remains unsettled, accumulating evidence suggests that soluble forms of Aβ are indeed the proximate effectors of synapse loss and neuronal injury. Here we review recent progress in understanding the role of soluble oligomers in Alzheimer’s disease.

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Crossref · 10.1111/j.1471-4159.2006.04426.x

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146 of 146 references verified0 citation errors · 0 not checkable

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  • Soluble Aβ oligomers are more neurotoxic than insoluble aggregates both in vitro and in vivo.

    “recent studies have shown that the soluble Aβ oligomers are more neurotoxic both in vitro and in vivo.5−8”

    From Small Bifunctional Chelators That Do Not Disaggregate Amyloid β Fibrils Exhibit Reduced Cellular Toxicity (2014) · cites this paper as [5]

    In “Detection and toxicity of non-fibrillar assemblies of synthetic Aβ” (page not provided), the review reports that oligomers caused substantially faster and greater neuronal death in culture than fibrillar Aβ. It also describes brain dysfunction caused by soluble oligomers in animals in “Aβ self-association is required for toxicity” (page not provided), but does not establish that they are more neurotoxic than insoluble aggregates in vivo. (LLM, conf=0.83)

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  • For preformed Aβ42 fibrils, no significant cell toxicity was observed in either the absence or presence of Cu2+.

    “For the preformed Aβ42 fibrils, no significant cell toxicity was observed in either the absence or presence of Cu2+ (Figure 9, lanes 1 and 2), supporting the previously reported diminished toxicity of Aβ42 fibrils.5,7,54−56”

    From Small Bifunctional Chelators That Do Not Disaggregate Amyloid β Fibrils Exhibit Reduced Cellular Toxicity (2014) · cites this paper as [5]

    In “Detection and toxicity of non-fibrillar assemblies of synthetic Aβ” (page not provided), the review reports that fibrillar Aβ caused only modest cell death at a higher concentration and after a longer exposure than oligomers. This supports the cited background point that fibrils have diminished toxicity, but it does not report the citing paper’s specific finding of no significant toxicity from preformed Aβ42 fibrils with or without Cu2+. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • Soluble Aβ oligomers are more neurotoxic than amyloid plaques and most likely responsible for synaptic dysfunction and memory loss in AD.

    “However, recent in vivo studies have shown that soluble Aβ oligomers are more neurotoxic than amyloid plaques and most likely responsible for synaptic dysfunction and memory loss in AD.7–11”
  • Soluble Aβ oligomers are possibly more neurotoxic than amyloid plaques and are likely responsible for synaptic dysfunction and memory loss in AD patients and AD animal models.

    “However, recent in vivo studies have shown that the soluble Aβ oligomers are possibly more neurotoxic than amyloid plaques,14–17 and are likely responsible for synaptic dysfunction and memory loss in AD patients and AD animal models.18–21”
  • Aβ42 peptide was shown to form neurotoxic soluble Aβ oligomers.

    “which was also shown to form neurotoxic soluble Aβ oligomers.18–20”

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1 retracted

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1 of the 147 references couldn’t be matched to a known paper.

Research works printed but not linked: 9

  1. D. M. Walsh and D. J. Selkoe Journal Compilation Ó 2007 International Society for Neurochemistry, J. Neurochem. (2007) 101, 1172-1184
  2. Ó 2007 The Authors 14714159, 2007, 5, · DOI
  3. Ó 2007 The Authors Journal Compilation Ó 2007 International Society for Neurochemistry, J. Neurochem. (2007) 101, 1172-1184 14714159, 2007, 5, · DOI
  4. D. M. Walsh and D. J. Selkoe Journal Compilation Ó 2007 International Society for Neurochemistry, J. Neurochem. (2007) 101, 1172-1184
  5. Ó 2007 The Authors 14714159, 2007, 5, · DOI
  6. Shankar G. M., Townsend M., Walsh D. M., Selkoe D. J. and Sabatini B. L. (2007) Natural oligomers of the Alzheimer amyloid beta- protein induce hippocampal synapse loss but can be neutralized by antibodies and small molecules. J. Neurosci. in press.
  7. Westerman M. A., Cooper-Blacketer D., Mariash A., Kotilinek L., Kawarabayashi T., Younkin L. H., Carlson G. A., Younkin S. G. Ab Oligomers -a decade of discovery 1183 Ó 2007 The Authors Journal Compilation Ó 2007 International Society for Neurochemistry, J. Neurochem. (2007) 101, 1172-1184 14714159, 2007, 5, · DOI
  8. D. M. Walsh and D. J. Selkoe Journal Compilation Ó 2007 International Society for Neurochemistry, J. Neurochem. (2007) 101, 1172-1184
  9. Ó 2007 The Authors 14714159, 2007, 5, · DOI

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Authors
Walsh, D. M., & Selkoe, D. J.
Affiliations
  • University College Dublin (IE)
  • Brigham and Women's Hospital (US)
Corresponding author
  • Walsh, Dominic M.
  • Selkoe, Dennis J.
Venue
Journal of Neurochemistry
Publisher
Wiley
Published
2007-01-04
Volume
101
Issue
5
Pages
1172-1184
ISSN
  • 0022-3042 (ISSN-L)
  • 1471-4159
OpenAlex
W1981458288
Cited by
1,938
References
147
Citations by year
2026: 48 · 2025: 36 · 2024: 46 · 2023: 47 · 2022: 50 · 2021: 63 · 2020: 76 · 2019: 81 · 2018: 81 · 2017: 109 · 2016: 120 · 2015: 136 · 2014: 134 · 2013: 159 · 2012: 167
FWCI
14.23
Type
journal article
Language
en
Open access
Locations
  • Journal of Neurochemistry (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Foundation for Neurologic Diseases
  • Wellcome Trust (067660)
  • National Institutes of Health
  • National Institute on Aging (AG-06173)
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 › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
amyloid-beta oligomers, Alzheimer's disease, soluble amyloid-beta, synaptic loss, neuronal injury, amyloid fibrils, amyloid precursor protein, transgenic mouse model
MeSH terms
Alzheimer Disease, Humans, Male, Amyloid beta-Peptides, Amyloid beta-Protein Precursor, Protein Structure, Secondary

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