Abstract
The ubiquitin/proteasome pathway is the major proteolytic quality control system in cells. In this review we discuss the impact of a deregulation of this pathway on neuronal function and its causal relationship to the intracellular deposition of ubiquitin protein conjugates in pathological inclusion bodies in all the major chronic neurodegenerative disorders, such as Alzheimer’s, Parkinson’s and Huntington’s diseases as well as amyotrophic lateral sclerosis. We describe the intricate nature of the ubiquitin/proteasome pathway and discuss the paradox of protein aggregation, i.e. its potential toxic/protective effect in neurodegeneration. The relations between some of the dysfunctional components of the pathway and neurodegeneration are presented. We highlight possible ubiquitin/proteasome pathway-targeting therapeutic approaches, such as activating the proteasome, enhancing ubiquitination and promoting SUMOylation that might be important to slow/treat the progression of neurodegeneration. Finally, a model time line is presented for neurodegeneration starting at the initial injurious events up to protein aggregation and cell death, with potential time points for therapeutic intervention.
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Abbreviations
- AD:
-
Alzheimer’s disease
- AIRAP:
-
Arsenite-inducible RNA-associated protein
- ALS:
-
Amyotrophic lateral sclerosis
- CDDO:
-
2-Cyano-3,12-dioxooleana-1,9-dien-28-oic acid
- CHIP:
-
Carboxyl terminus of Hsc 70-interacting protein
- CNS:
-
Central nervous system
- DALIS:
-
Dendritic cell aggresome-like induced structures
- DriPs:
-
Defective ribosomal products
- E1:
-
Ubiquitin-activating enzyme
- E2:
-
Ubiquitin-conjugating enzyme
- E3:
-
Ubiquitin ligase
- Gad:
-
Gracile axonal dystrophy
- GFP:
-
Green fluorescent protein
- HD:
-
Huntington’s disease
- Hsp:
-
Heat shock protein
- LC3:
-
Light chain 3
- MJD:
-
Machado-Joseph disease
- MTOC:
-
Microtubule organizing center
- NF-κB:
-
Nuclear factor kappa-light-chain-enhancer of activated B cells
- Nrf2:
-
Nuclear factor-erythroid 2-related factor 2
- PA:
-
Proteasome activator
- PD:
-
Parkinson’s disease
- PGJ2:
-
Prostaglandin J2
- PINK1:
-
PTEN-induced kinase 1
- PolyQ:
-
Polyglutamine
- POMP:
-
Proteasome maturation protein
- PROTACS:
-
Proteolysis targeting chimera molecules
- Rpn:
-
19S Regulatory particle, non ATP-dependent
- UBA:
-
Ubiquitin-associated domain
- UBL:
-
Ubiquitin-like domain
- UCH-L1:
-
Ubiquitin carboxyl-terminal hydrolase-L1
- UDP:
-
Ubiquitin-domain proteins
- UIM:
-
Ubiquitin-interacting motif
- UPP:
-
Ubiquitin/proteasome pathway
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Acknowledgments
Please note that this review is not intended to be comprehensive and we apologize to the authors whose work is not mentioned. Supported by National Institutes of Health (NIH) [AG028847 to M.F.-P. from National Institute of Aging; NS41073 (Specialized Neuroscience Research Programs) to M.F.-P. (head of subproject) from National Institute of Neurological Disorders and Stroke; RR03037 to Hunter College (infrastructure) from National Institute of General Medical Sciences (NIGMS)/RCMI (Research Centers in Minority Institutions)].
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The authors declare that they have no conflict of interest.
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Huang, Q., Figueiredo-Pereira, M.E. Ubiquitin/proteasome pathway impairment in neurodegeneration: therapeutic implications. Apoptosis 15, 1292–1311 (2010). https://doi.org/10.1007/s10495-010-0466-z
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DOI: https://doi.org/10.1007/s10495-010-0466-z