Amyloid β-protein oligomers and Alzheimer’s disease
Open accessAbstract
The oligomer cascade hypothesis, which states that oligomers are the initiating pathologic agents in Alzheimer's disease, has all but supplanted the amyloid cascade hypothesis, which suggested that fibers were the key etiologic agents in Alzheimer's disease. We review here the results of in vivo, in vitro and in silico studies of amyloid β-protein oligomers, and discuss important caveats that should be considered in the evaluation of these results. This article is divided into four sections that mirror the main approaches used in the field to better understand oligomers: (1) attempts to locate and examine oligomers in vivo in situ; that is, without removing these species from their environment; (2) studies involving oligomers extracted from human or animal tissues and the subsequent characterization of their properties ex vivo; (3) studies of oligomers that have been produced synthetically and studied using a reductionist approach in relatively simple in vitro biophysical systems; and (4) computational studies of oligomers in silico. These multiple orthogonal approaches have revealed much about the molecular and cell biology of amyloid β-protein. However, as informative as these approaches have been, the amyloid β-protein oligomer system remains enigmatic.
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Misfolded Aβ and tau proteins accumulate in the AD brain in a neurodegenerative cascade leading to cognitive decline and dementia.
“Misfolded Aβ and tau proteins accumulate in the AD brain in a neurodegenerative cascade leading to cognitive decline and dementia [4,5,6,7,8,9].”
From Treatment of Alzheimer’s Disease: Beyond Symptomatic Therapies (2023) · cites this paper as [7]
The Introduction describes Aβ deposits and oligomers in AD and links loss of cognitive function to synaptic damage and neuronal loss. The ‘Oligomer characterization in vivo’ section reports tau accumulation and cognitive decline together in a mouse model, but the paper does not establish that misfolded Aβ and tau both accumulate in the human AD brain as a single causal cascade leading to dementia. (LLM, conf=0.84)
Experimental — accuracy not yet measuredElevated levels of Aβ oligomers are associated with AD, as they are found in AD brains and are considered the most toxic and pathogenic form of Aβ.
“Elevated levels of oligomers have been associated with AD, as they are found in AD brains and are considered the most toxic and pathogenic form of Aβ [4,5,6,7,18].”
From Treatment of Alzheimer’s Disease: Beyond Symptomatic Therapies (2023) · cites this paper as [7]
The Aβ oligomer hypothesis, supported by in vitro, in vivo, and ex vivo models, points to toxic Aβ oligomers rather than amyloid plaques as key players in AD pathogenesis.
“The Aβ oligomer hypothesis, supported by in vitro, in vivo, and ex vivo models, points to the toxic Aβ oligomers rather than amyloid plaques as key players in AD pathogenesis [4,5,6,7].”
From Treatment of Alzheimer’s Disease: Beyond Symptomatic Therapies (2023) · cites this paper as [7]
Aβ oligomers are considered the most toxic and pathogenic form of Aβ.
“(AβO)s are considered the most toxic and pathogenic form of Aβ [79,82].”
From Role of Oxidative Damage in Alzheimer’s Disease and Neurodegeneration: From Pathogenic Mechanisms to Biomarker Discovery (2021) · cites this paper as [82]
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Amyloid Beta: Structure, Biology and Structure-Based Therapeutic Development
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The keystone of Alzheimer pathogenesis might be sought in Aβ physiology
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Treatment of Alzheimer’s Disease: Beyond Symptomatic Therapies
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“Elevated levels of oligomers have been associated with AD, as they are found in AD brains and are considered the most toxic and pathogenic form of A β [4–7 , 18].”
BackgroundModulation of the Aβ peptide aggregation pathway by KP1019 limits Aβ-associated neurotoxicity
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Shear-Induced Amyloid Formation in the Brain: I. Potential Vascular and Parenchymal Processes
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- Authors
- Hayden, E. Y., & Teplow, D. B.
- Affiliations
- University of California, Los Angeles (US)
- Corresponding author
- Teplow, David B
- Venue
- Alzheimer's Research & Therapy
- Published
- 2013
- Volume
- 5
- Issue
- 6
- Pages
- 60
- ISSN
- 1758-9193 (ISSN-L)
- PMC
- PMC3978746
- OpenAlex
- W2101027386
- Cited by
- 276
- References
- 123
- Citations by year
- 2026: 12 · 2025: 29 · 2024: 25 · 2023: 20 · 2022: 35 · 2021: 30 · 2020: 25 · 2019: 18 · 2018: 19 · 2017: 21 · 2016: 17 · 2015: 19 · 2014: 6
- FWCI
- 1.54
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Alzheimer s Research & Therapy (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- eScholarship (California Digital Library) (submittedVersion)
- Funders
- National Institutes of Health (UL1TR000124, NS038328, AG028748, AG027818)
- National Institute on Aging (R01AG041295, P30AG028748)
- Clinical and Translational Science Institute, University of California, Los Angeles (UL1TR000124)
- 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
- Alzheimer's disease, amyloid hypothesis, amyloid fibrils
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