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Investigating the Spreading and Toxicity of Prion-like Proteins Using the Metazoan Model Organism C. elegans
Published on: January 8, 2015
Central nervous system inflammation and prion disease pathogenesis.
1CNS Inflammation Group, School of Biological Sciences, University of Southampton, Southampton, UK.
Methods in Molecular Medicine
|March 5, 2011
Summary
Prion diseases, previously thought to lack brain inflammation, show activated microglia, the brain's immune cells. This study argues that microglia activation in prion diseases signifies an inflammatory response.
Area of Science:
- Neuroimmunology
- Prion Disease Pathogenesis
Background:
- The role of inflammation in prion diseases is a recent area of study.
- Historically, prion diseases were believed to lack an inflammatory response in the brain.
- Despite this, pathological hallmarks of prion diseases are linked to activated microglia.
Purpose of the Study:
- To address the discrepancy regarding inflammation in prion diseases.
- To define inflammation in the context of the brain's response to injury or infection.
- To establish that activated microglia in prion-affected brains constitute an inflammatory response.
Main Methods:
- Review of existing literature on prion disease pathology and neuroinflammation.
- Analysis of studies associating pathological hallmarks with microglia activation.
- Definition of innate inflammatory response based on historical and cellular definitions.
Main Results:
- Evidence shows activated microglia are present alongside prion disease pathological features.
- Microglia are identified as the brain's resident macrophages (phagocytic cells).
- The presence of activated microglia aligns with the definition of an inflammatory response.
Conclusions:
- The presence of activated microglia in prion-affected brains represents a neuroinflammatory response.
- Revisiting the definition of inflammation is key to understanding prion disease pathology.
- This finding challenges the long-held dogma that prion diseases are non-inflammatory.
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