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Updated: Feb 27, 2026
Investigating the Spreading and Toxicity of Prion-like Proteins Using the Metazoan Model Organism C. elegans
Published on: January 8, 2015
Aβ seeds and prions: How close the fit?
Jay Rasmussen1,2,3, Mathias Jucker1,2, Lary C Walker4
1a Department of Cellular Neurology , Hertie Institute for Clinical Brain Research, University of Tübingen , Tübingen , Germany.
Abstract:
The prion paradigm is increasingly invoked to explain the molecular pathogenesis of neurodegenerative diseases involving the misfolding and aggregation of proteins other than the prion protein (PrP). Extensive evidence from in vitro and in vivo studies indicates that misfolded and aggregated Aβ peptide, which is the probable molecular trigger for Alzheimer's disease, manifests all of the key characteristics of canonical mammalian prions. These features include a β-sheet rich architecture, tendency to polymerize into amyloid, templated corruption of like protein molecules, ability to form structurally and functionally variant strains, systematic spread by neuronal transport, and resistance to inactivation by heat and formaldehyde. In addition to Aβ, a growing body of research supports the view that the prion-like molecular transformation of specific proteins drives the onset and course of a remarkable variety of clinicopathologically diverse diseases. As such, the expanded prion paradigm could conceptually unify fundamental and translational investigations of these disorders.
Insights
The prion paradigm explains neurodegenerative diseases. Misfolded amyloid-beta (Aβ) in Alzheimer's disease shares prion-like characteristics, suggesting a unified approach to studying these disorders.
Area of Science:
- Neuroscience
- Molecular Biology
- Pathology
Background:
- The prion paradigm is increasingly used to understand neurodegenerative diseases caused by protein misfolding.
- Misfolded and aggregated amyloid-beta (Aβ) is implicated as the trigger for Alzheimer's disease.
Purpose of the Study:
- To evaluate if Aβ exhibits prion-like characteristics.
- To explore the potential of an expanded prion paradigm to unify research on diverse neurodegenerative disorders.
Main Methods:
- Review of in vitro and in vivo studies on Aβ aggregation.
- Comparison of Aβ characteristics with canonical mammalian prions.
Main Results:
- Aβ exhibits key prion-like features: β-sheet structure, polymerization into amyloid, templated misfolding, strain variability, neuronal spread, and resistance to inactivation.
- Research indicates prion-like protein transformation drives various clinicopathologically diverse diseases.
Conclusions:
- The Aβ peptide in Alzheimer's disease aligns with the prion paradigm.
- An expanded prion paradigm offers a unifying framework for investigating and treating a range of neurodegenerative diseases.
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