Cited by 69Alzheimer's disease research and treatmentsUbiquitin and proteasome pathwaysParkinson's Disease Mechanisms and Treatments

The interrelationship of proteasome impairment and oligomeric intermediates in neurodegeneration

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Deger, Jennifer M., Gerson, Julia E., Kayed, Rakez·2015·Aging Cell

Abstract

Various neurodegenerative diseases are characterized by the accumulation of amyloidogenic proteins such as tau, α-synuclein, and amyloid-β. Prior to the formation of these stable aggregates, intermediate species of the respective proteins-oligomers-appear. Recently acquired data have shown that oligomers may be the most toxic and pathologically significant to neurodegenerative diseases such as Alzheimer's and Parkinson's. The covalent modification of these oligomers may be critically important for biological processes in disease. Ubiquitin and small ubiquitin-like modifiers are the commonly used tags for degradation. While the modification of large amyloid aggregates by ubiquitination is well established, very little is known about the role ubiquitin may play in oligomer processing and the importance of the more recently discovered sumoylation. Many proteins involved in neurodegeneration have been found to be sumoylated, notably tau protein in brains afflicted with Alzheimer's. This evidence suggests that while the cell may not have difficulty recognizing dangerous proteins, in brains afflicted with neurodegenerative disease, the proteasome may be unable to properly digest the tagged proteins. This would allow toxic aggregates to develop, leading to even more proteasome impairment in a snowball effect that could explain the exponential progression in most neurodegenerative diseases. A better understanding of the covalent modifications of oligomers could have a huge impact on the development of therapeutics for neurodegenerative diseases. This review will focus on the proteolysis of tau and other amyloidogenic proteins induced by covalent modification, and recent findings suggesting a relationship between tau oligomers and sumoylation.

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  1. Lasagna-Reeves CA Castillo-Carranza DL Sengupta U Sarmiento J Troncoso J Jackson GR Kayed R Identification of oligomers at early stages of tau aggregation in Alzheimer’s disease FASEB J 2012b 26 1946 1959 22253473 PMC4046102

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Authors
Deger, J. M., Gerson, J. E., & Kayed, R.
Affiliations
The University of Texas Medical Branch at Galveston (US)
Corresponding author
  • Gerson, Julia E.
  • Kayed, Rakez
Venue
Aging Cell
Publisher
Wiley
Published
2015-06-05
Volume
14
Issue
5
Pages
715-724
ISSN
  • 1474-9718 (ISSN-L)
  • 1474-9726
OpenAlex
W2142423680
Cited by
69
References
111
Citations by year
2026: 3 · 2025: 3 · 2024: 8 · 2023: 3 · 2022: 6 · 2021: 6 · 2020: 5 · 2019: 7 · 2018: 9 · 2017: 10 · 2016: 7 · 2015: 2
FWCI
1.15
Type
journal article
Language
en
Open access
Locations
  • Aging Cell (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
Keywords
proteasome impairment, protein oligomers, neurodegeneration, tau protein, SUMOylation, ubiquitination, amyloidogenic proteins, tau oligomers, Alzheimer's disease, Parkinson's disease, protein degradation, covalent modification, alpha-synuclein, amyloid-beta
MeSH terms
Animals, Humans, Models, Molecular, tau Proteins, Neurodegenerative Diseases, Proteasome Endopeptidase Complex, Proteolysis

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