Deubiquitylating enzymes: potential target in autoimmune diseases
Niraj Parihar1, Lokesh Kumar Bhatt2
1Department of Pharmacology, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, Vile Parle (W), Mumbai, India.
Abstract:
The ubiquitin-proteasome pathway is responsible for the turnover of different cellular proteins, such as transport proteins, presentation of antigens to the immune system, control of the cell cycle, and activities that promote cancer. The enzymes which remove ubiquitin, deubiquitylating enzymes (DUBs), play a critical role in central and peripheral immune tolerance to prevent the development of autoimmune diseases and thus present a potential therapeutic target for the treatment of autoimmune diseases. DUBs function by removing ubiquitin(s) from target protein and block ubiquitin chain elongation. The addition and removal of ubiquitin molecules have a significant impact on immune responses. DUBs and E3 ligases both specifically cleave target protein and modulate protein activity and expression. The balance between ubiquitylation and deubiquitylation modulates protein levels and also protein interactions. Dysregulation of the ubiquitin-proteasome pathway results in the development of various autoimmune diseases such as inflammatory bowel diseases (IBD), psoriasis, multiple sclerosis (MS), systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA). This review summarizes the current understanding of ubiquitination in autoimmune diseases and focuses on various DUBs responsible for the progression of autoimmune diseases.
Insights
Deubiquitylating enzymes (DUBs) are crucial for immune tolerance. Dysregulation of DUBs contributes to autoimmune diseases, making them potential therapeutic targets for conditions like rheumatoid arthritis and multiple sclerosis.
Area of Science:
- Biochemistry
- Immunology
- Molecular Biology
Background:
- The ubiquitin-proteasome pathway regulates cellular protein turnover, impacting immune responses and cell cycle control.
- Deubiquitylating enzymes (DUBs) counteract ubiquitination, playing a key role in maintaining immune tolerance.
- Imbalances in ubiquitination are linked to the pathogenesis of autoimmune diseases, including IBD, psoriasis, MS, SLE, and RA.
Purpose of the Study:
- To review the role of ubiquitination in autoimmune diseases.
- To highlight the function of DUBs in immune tolerance and disease progression.
- To identify DUBs as potential therapeutic targets for autoimmune disorders.
Main Methods:
- Literature review of ubiquitination and deubiquitylation in the context of immune system function.
- Analysis of the mechanisms by which DUBs influence protein stability and immune cell activity.
- Examination of the link between dysregulated DUB activity and the development of specific autoimmune diseases.
Main Results:
- DUBs are essential for preventing autoimmune diseases by regulating immune tolerance.
- The balance between ubiquitylation and deubiquitylation is critical for modulating protein levels and interactions relevant to immunity.
- Specific DUBs are implicated in the progression of major autoimmune conditions.
Conclusions:
- DUBs are critical regulators of immune homeostasis and are implicated in the pathogenesis of autoimmune diseases.
- Targeting DUBs offers a promising therapeutic strategy for managing autoimmune disorders.
- Further research into DUB function is warranted for developing novel treatments for conditions like rheumatoid arthritis and multiple sclerosis.
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