Cited by 384Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

The Amyloid Cascade Hypothesis in Alzheimer’s Disease: It’s Time to Change Our Mind

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Ricciarelli, Roberta, Fedele, Ernesto·2017·Current Neuropharmacology

Abstract

Since its discovery in 1984, the beta amyloid peptide has treaded the boards of neurosciences as the star molecule in Alzheimer's disease pathogenesis. In the last decade, however, this vision has been challenged by evidence-based medicine showing the almost complete failure of clinical trials that experimented anti-amyloid therapies with great hopes. Moreover, data have accumulated which clearly indicate that this small peptide plays a key role in the physiological processes of memory formation. In the present review, we will discuss the different aspects of the amyloid cascade hypothesis, highlighting its pros and cons, and we will analyse the results of the therapeutic approaches attempted to date that should change the direction of Alzheimer's disease research in the future.

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  • More integrative hypotheses have suggested that inflammation, excitatory-inhibitory imbalance, or vascular impairment is involved in the series of initial reactions that eventually become chronic and result in irreversible brain dyshomeostasis, neurodegeneration, and AD.

    “Therefore, more integrative hypotheses have suggested that inflammation, excitatory‐inhibitory imbalance, or vascular impairment is involved in the series of initial reactions that eventually become chronic and result in irreversible brain dyshomeostasis, neurodegeneration, and AD [42, 66, 69].”

    From Gliovascular alterations in sporadic and familial Alzheimer's disease: <scp><i>APOE3</i></scp> Christchurch homozygote glioprotection (2023) · cites this paper as [69]

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  • Under healthy conditions, soluble monomeric Aβ contributes to synaptic regulation, neuronal signaling, and neuroprotection through modulation of calcium homeostasis, metal ion binding, and antimicrobial defense.

    “Under healthy conditions, soluble monomeric Aβ contributes to synaptic regulation, neuronal signaling, and neuroprotection through modulation of calcium homeostasis, metal ion binding, and antimicrobial defense [41–43].”

    From Toward a Unified Framework in Molecular Neurobiology of Alzheimer’s Disease: Revisiting the Pathophysiological Hypotheses (2026) · cites this paper as [42]

    The section “The physiological roles of APP and Aβ” (page unavailable) reports that physiological Aβ supports hippocampal synaptic plasticity, neurotransmitter release and neuronal viability. It also suggests an antimicrobial role, but attributes that role to soluble Aβ oligomers, not monomers. The copy does not establish monomer-specific benefits through calcium homeostasis or metal-ion binding; its discussion of calcium dysregulation concerns toxic effects. (LLM, conf=0.87)

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  1. [5]Ferreira S.T. Lourenco M.V. Oliveira M.M. De Felice F.G. Soluble amyloid-β oligomers as synaptotoxins leading to cognitive impairment in Alzheimer’s disease. Front. Cell. Neurosci. 2015 26 9 191 PMC4443025 26074767
  2. [90]Wang H. Song L. Laird F. Wong P.C. Lee H.K. BACE1 knockouts display deficits in activity-dependent potentiation of synaptic transmission at mossy fiber to CA3 synapses in the hippocampus. J. Neurosci. 2008 28 8677 8681 [http://dx.doi.org/ 10.1523/JNEUROSCI.2440-08.2008]. 18753368 PMC2728626 · DOI

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Authors
Ricciarelli, R., & Fedele, E.
Affiliations
University of Genoa (IT)
Corresponding author
  • Ricciarelli, Roberta
  • Fedele, Ernesto
Venue
Current Neuropharmacology
Published
2017-07-31
Volume
15
Issue
6
Pages
926-935
ISSN
1570-159X (ISSN-L)
OpenAlex
W2581177196
Cited by
380
References
111
Citations by year
2026: 22 · 2025: 30 · 2024: 49 · 2023: 60 · 2022: 53 · 2021: 58 · 2020: 51 · 2019: 33 · 2018: 13 · 2017: 11
FWCI
21.86
Type
journal article
Language
en
Open access
Licence
cc-by-nc
Locations
  • Current Neuropharmacology (publishedVersion)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • CINECA IRIS Institutial Research Information System (University of Genoa) (submittedVersion)
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 hypothesis, Alzheimer's disease, amyloid-beta, anti-amyloid therapy, clinical trial failure, memory formation, Alzheimer's disease pathogenesis
MeSH terms
Alzheimer Disease, Animals, Brain, Humans, Amyloid beta-Peptides

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