Tumor suppressive functions of p53
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Updated: Jun 17, 2026
Yeast As a Chassis for Developing Functional Assays to Study Human P53
Published on: August 4, 2019
1Zilfou Therapeutics, Inc., Allentown, Pennsylvania 18104, USA. jackzilfou@verizon.net <jackzilfou@verizon.net>
Abstract:
The majority of human cancers acquire mutations that abrogate the p53 tumor suppressor network and, as a consequence, p53 is one of the most extensively studied proteins in cancer research. Because of its potent tumor suppressive activity, it is widely assumed that a molecular understanding of p53 action will produce fundamental insights into natural processes that limit tumorigenesis and may identify key molecular targets for therapeutic intervention. p53 functions largely as a transcription factor, and can trigger a variety of antiproliferative programs by activating or repressing key effector genes. Despite a significant body of literature detailing the biochemical and biological functions of p53, much remains to be elucidated. Indeed, the p53 network is as complex and enigmatic as it is relevant. It is the goal of this article, written 30 years after the discovery of p53, to present a concise review of the tumor suppressor role of the p53 network and to highlight the context-dependent nature of p53 target-gene functions.
Insights
The p53 tumor suppressor network is crucial in preventing cancer by regulating cell proliferation. Understanding its complex functions and context-dependent gene regulation is key for cancer research and therapy.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- The p53 tumor suppressor network is frequently disrupted in human cancers.
- p53 plays a critical role in preventing tumorigenesis.
- Understanding p53's function is vital for cancer therapy development.
Purpose of the Study:
- To provide a concise review of the tumor suppressor role of the p53 network.
- To highlight the context-dependent functions of p53 target genes.
- To synthesize current knowledge on p53's mechanisms 30 years after its discovery.
Main Methods:
- Literature review and synthesis of existing research on p53.
- Analysis of p53's function as a transcription factor.
- Examination of p53's role in activating/repressing effector genes.
Main Results:
- p53 acts as a transcription factor, controlling antiproliferative programs.
- The p53 network's functions are context-dependent.
- Despite extensive study, the p53 network remains complex and not fully understood.
Conclusions:
- The p53 network is a central player in tumor suppression.
- Further elucidation of p53's context-specific actions is needed.
- Targeting the p53 network holds therapeutic potential for cancer treatment.
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