Self-Propagating, Molecular-Level Polymorphism in Alzheimer's ß-Amyloid Fibrils
Abstract
Amyloid fibrils commonly exhibit multiple distinct morphologies in electron microscope and atomic force microscope images, often within a single image field. By using electron microscopy and solid-state nuclear magnetic resonance measurements on fibrils formed by the 40-residue β-amyloid peptide of Alzheimer's disease (Aβ 1–40 ), we show that different fibril morphologies have different underlying molecular structures, that the predominant structure can be controlled by subtle variations in fibril growth conditions, and that both morphology and molecular structure are self-propagating when fibrils grow from preformed seeds. Different Aβ 1–40 fibril morphologies also have significantly different toxicities in neuronal cell cultures. These results have implications for the mechanism of amyloid formation, the phenomenon of strains in prion diseases, the role of amyloid fibrils in amyloid diseases, and the development of amyloid-based nano-materials.
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Transfer of abnormal misfolded proteins, including tau and Aβ, has a common feature of pathological propagation between cells.
“The transfer of abnormal misfolded proteins, including tau and Aβ, has a common feature of the pathological propagation between cells [42, 56].”
From Tau and neuroinflammation in Alzheimer’s disease: interplay mechanisms and clinical translation (2023) · cites this paper as [56]
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- Authors
- Petkova, A. T., Leapman, R. D., Guo, Z., Yau, W.-M., Mattson, M. P., & Tycko, R.
- Affiliations
- National Institutes of Health (US)
- Corresponding author
- Tycko, Robert
- Venue
- Science
- Published
- 2005-01-14
- Volume
- 307
- Issue
- 5707
- Pages
- 262-265
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2004098528
- Cited by
- 1,687
- References
- 31
- Citations by year
- 2026: 34 · 2025: 43 · 2024: 45 · 2023: 57 · 2022: 47 · 2021: 72 · 2020: 67 · 2019: 74 · 2018: 92 · 2017: 84 · 2016: 93 · 2015: 73 · 2014: 93 · 2013: 114 · 2012: 102
- FWCI
- 57.13
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Science (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Prion Diseases and Protein Misfolding
- Physical Sciences › Materials Science › Biomaterials › Supramolecular Self-Assembly in Materials
- Keywords
- amyloid fibrils, beta-amyloid peptide, Aβ(1-40), Alzheimer's disease, fibril polymorphism, fibril morphology, self-propagation, amyloid toxicity, prion disease
- MeSH terms
- Animals, Cells, Cultured, Chemistry, Physical, Hippocampus, Humans, Hydrogen Bonding, Neurons, Peptide Fragments, Protein Conformation, Molecular Structure, Amyloid beta-Peptides, Protein Structure, Secondary, Microscopy, Atomic Force, Nuclear Magnetic Resonance, Biomolecular, Amino Acid Motifs, Microscopy, Electron, Transmission, Rats, Chemical Phenomena
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