Related Experiment Video
Updated: Jun 28, 2026

Evaluation of Substrate Ubiquitylation by E3 Ubiquitin-ligase in Mammalian Cell Lysates
Published on: May 10, 2022
Natural polyphenols as proteasome modulators and their role as anti-cancer compounds
Laura Bonfili1, Valentina Cecarini, Manila Amici
1Department of Molecular, Cellular and Animal Biology, University of Camerino, Italy.
Abstract:
The purpose of this review is to discuss the effect of natural antioxidant compounds as modulators of the 20S proteasome, a multi-enzymatic multi-catalytic complex present in the cytoplasm and nucleus of eukaryotic cells and involved in several cellular activities such as cell-cycle progression, proliferation and the degradation of oxidized and damaged proteins. From this perspective, proteasome inhibition is a promising approach to anticancer therapy and such natural antioxidant effectors can be considered as potential relevant adjuvants and pharmacological models in the study of new drugs.
Insights
Natural antioxidants can modulate the 20S proteasome, a key cellular complex. This suggests their potential as anticancer agents and valuable tools for developing new cancer therapies.
Area of Science:
- Biochemistry
- Cell Biology
- Pharmacology
Background:
- The 20S proteasome is a crucial complex in eukaryotic cells, regulating protein degradation.
- It plays a role in cell-cycle progression, proliferation, and clearing damaged proteins.
- Dysregulation of proteasome function is implicated in various diseases, including cancer.
Purpose of the Study:
- To review the role of natural antioxidant compounds in modulating the 20S proteasome.
- To explore the potential of these compounds as anticancer agents.
- To highlight their utility as pharmacological models for drug development.
Main Methods:
- Literature review of studies investigating natural antioxidants and the 20S proteasome.
- Analysis of the mechanisms by which antioxidants affect proteasome activity.
- Examination of the therapeutic implications of proteasome modulation by antioxidants.
Main Results:
- Natural antioxidants can act as modulators of the 20S proteasome.
- These compounds exhibit potential for proteasome inhibition, a known anticancer strategy.
- Evidence suggests their efficacy in degrading oxidized and damaged proteins.
Conclusions:
- Natural antioxidants represent a promising avenue for anticancer therapy.
- They can serve as valuable adjuvants in cancer treatment.
- These compounds offer potential as pharmacological models for novel drug discovery targeting the proteasome.
More Related Videos
Related Concept Videos
Targeted Cancer Therapies
There are several types of targeted therapies against specific...
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...

