Amyloid-beta Oligomers
Amyloid-beta Oligomers - Related Videos
10:19
Neurodegeneration in an Animal Model of Chronic Amyloid-beta Oligomer Infusion Is Counteracted by Antibody Treatment Infused with Osmotic Pumps
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Cited by 11 •
2016
To study the effects of Aβo in vivo, we developed a model based on repeated hippocampal infusions of soluble Aβo coupled with continuous infusion of Aβo antibody (6E10) in the hippocampus using osmotic pumps to counteract the neurotoxic effect of Aβo.
06:34
A Tailored HPLC Purification Protocol That Yields High-purity Amyloid Beta 42 and Amyloid Beta 40 Peptides, Capable of Oligomer Formation
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Cited by 6 •
2017
Herein we report a tailored HPLC purification protocol that yields high-purity amyloid beta 42 (Aβ42) and amyloid beta 40 (Aβ40) peptides, capable of oligomer formation. Amyloid beta is a highly aggregation prone, hydrophobic peptide implicated in Alzheimer's disease. The amyloidogenic nature of the peptide makes its purification a challenge.
05:29
Controlled Infusion of Aβ Peptide-Specific Antibodies and Aβ Oligomers into the Rat Hippocampus
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2025
This video demonstrates a technique for the continuous infusion of amyloid-beta (Aβ) peptide-specific antibodies into the hippocampus of a rat. The study employs implanting a bilateral cannula system for a controlled infusion of Aβ peptide-specific antibodies coupled with the infusion of soluble Aβ oligomers (Aβo) into the rat hippocampus to study the interactions between the oligomers and the antibodies.
04:19
Size-Exclusion Chromatography with Multi-Angle Light Scattering for Protein Oligomers
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2025
This video describes SEC-MALS, which leverages the abilities of size-exclusion chromatography (SEC) and multi-angle light scattering (MALS). In SEC-MALS, the SEC separates proteins or protein complexes based on their size, and the MALS detector determines the average molecular weight by measuring the intensity of the light scattered by the molecule at different angles.
01:25
Beta
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2024
Beta is a crucial metric in finance used to assess an investment's risk and expected return relative to the overall market. It is calculated as the slope of the line in a scatterplot that compares the returns of an individual stock to the returns of the market benchmark, typically represented by a broad market index. Beta quantifies how much a stock's price moves in response to market movements, providing insight into its volatility and systematic risk. A beta of one indicates that the stock's...
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Their small, metastable assemblies can associate with cell membranes and synaptic proteins, affecting membrane integrity and intracellular signaling. These interactions provide a mechanistic link between peptide aggregation and changes in neuronal function. Studying which membrane or synaptic interactions accompany these effects helps researchers connect oligomer structure with cellular disruption rather than treating aggregation as a single, uniform process.
Amyloid-beta oligomers are metastable, meaning their structures can persist temporarily while remaining capable of changing during aggregation. This structural flexibility complicates efforts to define which assemblies produce particular effects. Comparing oligomer structure with membrane interactions, synaptic effects, and inflammatory responses can help distinguish properties associated with toxicity from those associated with aggregation more generally.
Interactions between amyloid-beta oligomers and immune receptors can alter intracellular signaling and promote innate immune activation. In neural tissue, this response includes microglial activity and production of inflammatory mediators. Investigating these pathways clarifies how misfolded protein assemblies can be recognized as danger-related stimuli and how that recognition may connect protein aggregation with neuroinflammation.
They provide a model in which one molecular process, peptide self-association, can be examined alongside membrane disruption, altered signaling, and immune activation. This combination allows researchers to ask whether structural features of an assembly correspond to particular cellular or inflammatory outcomes. The approach is especially relevant when examining how protein misfolding contributes to changes in host-response pathways.
Three connected properties are central: oligomer structure, cellular toxicity, and molecular interactions. Structural analysis addresses which assemblies are present, while toxicity studies examine effects on neuronal function or membrane integrity. Interaction studies focus on synaptic proteins and immune receptors. Considering these properties together can reveal relationships between molecular form and downstream cellular or inflammatory responses.
In this subject area, the assemblies serve as a model for examining how misfolded proteins engage innate immune mechanisms. Researchers can use them to investigate microglial responses, inflammatory mediator production, and signaling through immune receptors. This context broadens infection-related host-defense research by highlighting how danger-associated molecular signals may influence inflammation even when the initiating stimulus is protein aggregation.