Related Experiment Video
Updated: May 28, 2026

Assaying Proteasomal Degradation in a Cell-free System in Plants
Published on: March 26, 2014
Molecular pathways: targeting proteasomal protein degradation in cancer
1Calithera Biosciences, Inc., South San Francisco, California 94080, USA. smolineaux@calithera.com
Abstract:
With the approval by the U.S. Food and Drug Administration of bortezomib for the treatment of multiple myeloma and mantle cell lymphoma, the proteasome was clinically validated as a target in oncology. The proteasome is part of a complex cellular pathway that controls the specificity and rate of degradation of the majority of proteins in the cell. The search for additional drug targets in the proteasomal pathway is ongoing. In parallel, the next generation of proteasome inhibitors, exhibiting some properties distinct from that of bortezomib, are currently being studied in clinical trials. The key question will be whether these distinctions can improve upon the clinical efficacy and safety standards established by bortezomib and refine our understanding of the mechanism by which proteasome inhibitors are effective in the treatment of cancer.
Insights
The proteasome is a validated cancer target, with new inhibitors in trials. Researchers are investigating if these next-generation proteasome inhibitors offer improved efficacy and safety over existing treatments.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- The proteasome's role in protein degradation is crucial for cellular function.
- Bortezomib's approval validated the proteasome as a key cancer therapeutic target.
- Ongoing research seeks novel drug targets within the proteasomal pathway.
Purpose of the Study:
- To explore the potential of next-generation proteasome inhibitors.
- To evaluate if distinct properties of new inhibitors enhance clinical efficacy and safety.
- To deepen the understanding of proteasome inhibitor mechanisms in cancer treatment.
Main Methods:
- Clinical trials of novel proteasome inhibitors.
- Comparative analysis of efficacy and safety profiles.
- Mechanistic studies on proteasome inhibition.
Main Results:
- Next-generation proteasome inhibitors are under clinical investigation.
- Distinct properties of these inhibitors are being assessed against bortezomib.
- Efficacy and safety data are pending further clinical evaluation.
Conclusions:
- The proteasome remains a significant target in cancer therapy.
- Next-generation inhibitors hold promise for improved cancer treatment outcomes.
- Further research is essential to elucidate their full therapeutic potential and mechanisms.
Related Concept Videos
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...
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...
Regulated Protein Degradation
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Regulated Protein Degradation
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Targeted Cancer Therapies
There are several types of targeted therapies against specific...

