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A Tailored HPLC Purification Protocol That Yields High-purity Amyloid Beta 42 and Amyloid Beta 40 Peptides, Capable of Oligomer Formation
Published on: March 27, 2017
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Different Aggregation Pathways and Structures for Aβ40 and Aβ42 Peptides.
Li Wang1, Kilho Eom1, Taeyun Kwon2
1Biomechanics Laboratory, College of Sport Science, Sungkyunkwan University (SKKU), Suwon 16419, Korea.
Biomolecules
|February 12, 2021
Summary
Amyloid-beta (Aβ) peptide self-aggregation is key in neurodegenerative diseases. This study reveals distinct aggregation pathways for Aβ40 and Aβ42 peptides, leading to different amyloid fibril structures.
Area of Science:
- Biochemistry
- Neuroscience
- Biophysics
Background:
- Amyloid-beta (Aβ) peptide self-aggregation is implicated in neurodegenerative diseases.
- Understanding Aβ aggregation pathways and structures is crucial for disease research.
Purpose of the Study:
- To investigate the aggregation pathways of Aβ40 and Aβ42 isoforms.
- To characterize the structures of Aβ40 and Aβ42 aggregates during the aggregation process.
Main Methods:
- Utilized fluorescence experiments.
- Employed atomic force microscopy (AFM) for structural analysis.
Main Results:
- Spherical oligomers form initially for both Aβ40 and Aβ42.
- These oligomers self-assemble into amyloid fibrils of varying shapes.
- Distinct aggregation pathways were observed for Aβ40 and Aβ42.
Conclusions:
- Aβ40 and Aβ42 exhibit different aggregation mechanisms.
- These differing pathways result in amyloid fibrils with contrasting structures.
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