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Amyloid Fibrils

Amyloid Fibrils

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.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining, normally used to...

Amyloid Fibrils

Amyloid Fibrils

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.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining, normally used to...

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Related Experiment Video

Updated: Jun 27, 2026

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

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Published on: May 22, 2018

Protection mechanisms against Abeta42 aggregation.

Y Yan¹, C Wang

¹Biology department, Rensselear Polytechnic Institute, Troy, NY 12180, USA.

Current Alzheimer Research

|December 17, 2008

Summary

Alzheimer's disease involves amyloid-beta 42 (Abeta42) aggregation. Naturally occurring molecules like amyloid-beta 40 (Abeta40) can inhibit this process, offering potential new therapeutic targets for AD.

Area of Science:

Neuroscience
Biochemistry
Pathology

Background:

Amyloid-beta 42 (Abeta42) aggregation is a key factor in Alzheimer's disease (AD) pathogenesis.
Abeta42 oligomers and fibrils lead to neural circuit breakdown, neuronal death, and dementia.
Endogenous protective mechanisms against Abeta42 aggregation are crucial for understanding AD.

Purpose of the Study:

To explore physiological molecules and mechanisms that inhibit Abeta42 aggregation.
To identify novel therapeutic strategies for AD based on promoting natural protective processes.
To discuss the relevance of these protective mechanisms in AD pathogenesis and intervention.

Main Methods:

Review and discussion of known protective molecules and mechanisms against Abeta42 aggregation.

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Analysis of the inhibitory role of amyloid-beta 40 (Abeta40) on Abeta42 aggregation.

Exploration of other protective factors including heat shock proteins, L-PGDS, heme, and methionine oxidation.

Main Results:

Amyloid-beta 40 (Abeta40) demonstrates specific and dose-dependent inhibition of Abeta42 aggregation.
Abeta40 represents a significant endogenous protective mechanism against Abeta42 aggregation.
Several other molecules and processes, such as heat shock proteins and heme, also exhibit inhibitory effects.

Conclusions:

Promoting endogenous protective molecules and mechanisms against Abeta42 aggregation is a promising avenue for AD drug discovery.
Understanding these natural defenses against Abeta42 aggregation is vital for developing effective AD interventions.
Abeta40's inhibitory role highlights its importance as a potential therapeutic target or model in AD research.