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Systemic AA amyloidosis as a prion-like disorder
Tomoaki Murakami1, Yasuo Inoshima2, Naotaka Ishiguro2
1Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo, Japan.
Virus Research
|December 24, 2014
Summary
AA amyloidosis, a lethal protein misfolding disease, can be experimentally induced and transmitted between animals. This review examines the pathology and transmission mechanisms of AA amyloidosis, highlighting its seeding-nucleation process similar to prion diseases.
Area of Science:
- Veterinary Pathology
- Protein Misfolding Diseases
- Immunology
Background:
- Amyloidosis encompasses disorders caused by misfolded protein accumulation (amyloid) in beta-sheets, leading to organ dysfunction.
- AA amyloidosis, a fatal systemic form, involves serum amyloid A (SAA) protein and affects multiple animal species.
- Experimental models demonstrate that inflammatory stimuli can induce AA amyloidosis.
Purpose of the Study:
- To review the pathology of AA amyloidosis in animals.
- To examine the transmissibility of AA amyloidosis across species.
- To elucidate the mechanisms underlying AA amyloidosis transmission.
Main Methods:
- Review of existing literature on AA amyloidosis pathology and experimental induction.
- Analysis of studies investigating the transmission of AA amyloidosis.
- Comparison of AA amyloidosis transmission with prion disease mechanisms.
Main Results:
- AA amyloidosis can be experimentally induced by sustained inflammatory stimuli in animal models.
- Administration of pre-formed AA amyloid accelerates disease development, a phenomenon termed transmission.
- Transmission is proposed to occur via a seeding-nucleation process, analogous to prion propagation.
Conclusions:
- AA amyloidosis exhibits transmissibility, influenced by seeding-nucleation mechanisms.
- Understanding transmission is crucial for managing and preventing AA amyloidosis in susceptible animal populations.
- Further research into the molecular basis of AA amyloidosis transmission can inform therapeutic strategies.
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