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Published on: May 10, 2022
Influence of proteasome inhibitors on apoptosis
Stacey R Vlahakis1, Andrew D Badley
1Mayo Clinic College of Medicine, Division of Infectious Diseases, Rochester, Minnesota, USA.
Purpose Of Review:
Proteasome inhibitors are a novel class of drugs that alter normal cellular control of apoptosis. As such, they are being investigated as novel therapies to alter uncontrolled cellular proliferation and treat cancers. This review explores new information about how the proteasome regulates apoptosis and how proteasome inhibitors can be exploited as anti-tumor drugs.
Recent Findings:
Proteasome inhibitors block the activation of nuclear factor kappa B in a number of cell systems, as well as altering apoptotic regulatory proteins and intracellular signals that influence the fate of the cell. These effects are true for many tumor cell lines. The US Food and Drug Administration-approved proteasome inhibitor bortezomib blocks erroneous cell proliferation and induces apoptosis in many tumor models.
Summary:
Proteasome inhibitors have demonstrated promise in vitro, and as a result clinical trials have begun to investigate these agents as therapy for numerous human cancers. Furthermore, newer agents are being designed to inhibit the proteasome system and exert further anti-tumor activity.
Insights
Proteasome inhibitors are a new drug class that can stop cancer cell growth and trigger cell death. Clinical trials are underway to explore their use as anti-tumor drugs for various human cancers.
Area of Science:
- Molecular Biology
- Oncology
- Pharmacology
Background:
- The proteasome is a critical cellular machine involved in protein degradation.
- Dysregulation of proteasome function is implicated in various cancers.
- Apoptosis, or programmed cell death, is a key target for cancer therapies.
Purpose of the Study:
- To review current understanding of proteasome's role in apoptosis.
- To explore the therapeutic potential of proteasome inhibitors in cancer treatment.
- To discuss novel strategies for developing proteasome-targeted anti-cancer drugs.
Main Methods:
- Review of existing scientific literature on proteasome inhibitors and apoptosis.
- Analysis of preclinical data on proteasome inhibitor efficacy in tumor models.
- Examination of clinical trial outcomes for proteasome inhibitor-based cancer therapies.
Main Results:
- Proteasome inhibitors disrupt nuclear factor-kappa B activation and modulate apoptotic pathways.
- These inhibitors induce apoptosis and inhibit proliferation in numerous cancer cell lines and models.
- Bortezomib, an FDA-approved proteasome inhibitor, demonstrates significant anti-tumor activity.
Conclusions:
- Proteasome inhibitors show significant promise as anti-cancer agents based on in vitro and in vivo studies.
- Clinical trials are actively investigating proteasome inhibitors for diverse human cancers.
- Ongoing research focuses on developing next-generation proteasome inhibitors with enhanced anti-tumor efficacy.
Related Concept Videos
The Intrinsic Apoptotic Pathway
The Proteasome
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3 (ubiquitin...
The Proteasome
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. A series of enzymes carry out the ubiquitination of the target proteins - E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
Caspases
The Extrinsic Apoptotic Pathway
Apoptosis

