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Related Concept Videos

Amyloid Fibrils03:03

Amyloid Fibrils

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Amyloid fibrils are aggregates of misfolded proteins.  Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils. 
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Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ...
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Related Experiment Video

Updated: Apr 12, 2026

A11-positive β-amyloid Oligomer Preparation and Assessment Using Dot Blotting Analysis
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A11-positive β-amyloid Oligomer Preparation and Assessment Using Dot Blotting Analysis

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Beta-amyloid oligomers: recent developments.

Vilmante Borutaite, Ramune Morkuniene, Gintaras Valincius

    Biomolecular Concepts
    |May 12, 2015
    PubMed
    Summary
    This summary is machine-generated.

    Soluble amyloid-beta oligomers are key drivers in Alzheimer's disease (AD) pathogenesis. This review explores their toxic effects, properties, and formation pathways, shifting focus from aggregates to these smaller, potent species.

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    Neurodegeneration in an Animal Model of Chronic Amyloid-beta Oligomer Infusion Is Counteracted by Antibody Treatment Infused with Osmotic Pumps

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    Area of Science:

    • Neuroscience
    • Biochemistry
    • Molecular Biology

    Background:

    • Alzheimer's disease (AD) is a common neurodegenerative disorder.
    • Beta-amyloid peptides, derived from the amyloid precursor protein, are implicated in AD pathogenesis.
    • Historically, extracellular beta-amyloid aggregates were considered the primary toxic species.

    Purpose of the Study:

    • To review recent findings on the toxic effects of soluble amyloid-beta oligomers.
    • To discuss the physico-chemical properties of these toxic oligomers.
    • To explore potential pathways for amyloid-beta oligomer formation in vitro and in vivo.

    Main Methods:

    • Literature review of recent studies on amyloid-beta oligomers.
    • Analysis of research on the toxic mechanisms of soluble oligomers.
    • Examination of studies detailing amyloid-beta oligomer formation and properties.

    Main Results:

    • Accumulating evidence indicates soluble amyloid-beta oligomers are highly toxic to neuronal cells.
    • These soluble forms are now considered more pathogenic than larger aggregates.
    • Understanding their properties and formation is crucial for AD research.

    Conclusions:

    • Soluble amyloid-beta oligomers play a critical role in Alzheimer's disease.
    • The focus in AD research has shifted towards understanding these soluble toxic species.
    • Further investigation into their formation and properties may reveal new therapeutic targets.