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Yeast As a Chassis for Developing Functional Assays to Study Human P53
Published on: August 4, 2019
Translational approaches targeting the p53 pathway for anti-cancer therapy
Frank Essmann1, Klaus Schulze-Osthoff
1Interfaculty Institute for Biochemistry and Comprehensive Cancer Center, University of Tübingen, Tübingen, Germany.
Abstract:
The p53 tumour suppressor blocks cancer development by triggering apoptosis or cellular senescence in response to oncogenic stress or DNA damage. Consequently, the p53 signalling pathway is virtually always inactivated in human cancer cells. This unifying feature has commenced tremendous efforts to develop p53-based anti-cancer therapies. Different strategies exist that are adapted to the mechanisms of p53 inactivation. In p53-mutated tumours, delivery of wild-type p53 by adenovirus-based gene therapy is now practised in China. Also, remarkable progress has been made in the development of p53-binding drugs that can rescue and reactivate the function of mutant or misfolded p53. Other biologic approaches include the development of oncolytic viruses that are designed to specifically replicate in and kill p53-defective cells. Inactivation of wt-p53 frequently results from dysregulation of MDM2, an E3 ligase that regulates p53 levels. Small-molecule drugs that inhibit the interaction of MDM2 and p53 and block p53 degradation are currently tested in clinical trials. This survey highlights the recent developments that attempt to modulate the function of p53 and outlines strategies that are being investigated for pharmacological intervention in the p53 pathway.
Insights
The p53 tumor suppressor is crucial for blocking cancer by inducing apoptosis or senescence. Reactivating p53 function is a key strategy in developing novel anti-cancer therapies for various cancer types.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- The p53 tumor suppressor protein is critical in preventing cancer by initiating apoptosis or senescence in response to cellular stress.
- Inactivation of the p53 signaling pathway is a common event in human cancers, making it a significant target for therapeutic intervention.
- Understanding the mechanisms of p53 inactivation is essential for developing effective p53-based cancer treatments.
Purpose of the Study:
- To review recent advancements in modulating the p53 pathway for cancer therapy.
- To outline current strategies for pharmacological intervention targeting p53.
- To highlight the diverse approaches being investigated to restore p53 function in cancer cells.
Main Methods:
- Gene therapy utilizing adenovirus vectors for p53-mutated tumors.
- Development of small-molecule drugs to reactivate mutant or misfolded p53.
- Engineering oncolytic viruses for selective replication in p53-deficient cancer cells.
- Investigating MDM2-p53 interaction inhibitors to prevent p53 degradation.
Main Results:
- Adenovirus-mediated wild-type p53 gene therapy is clinically applied in some regions.
- Promising progress in developing drugs that can restore the function of aberrant p53.
- Clinical trials are evaluating small-molecule inhibitors targeting the MDM2-p53 interaction.
Conclusions:
- Restoring or enhancing p53 pathway function represents a promising therapeutic avenue for a broad spectrum of cancers.
- Multiple strategies, including gene therapy, small-molecule drugs, and oncolytic viruses, are being explored to target p53.
- Pharmacological modulation of the p53 pathway holds significant potential for future cancer treatment development.
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