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Yeast As a Chassis for Developing Functional Assays to Study Human P53
Published on: August 4, 2019
The p53 network: cellular and systemic DNA damage responses in cancer and aging
Pavana Lakshmi Vaddavalli1, Björn Schumacher1
1Institute for Genome Stability in Aging and Disease, Medical Faculty, University Hospital and University of Cologne, Joseph-Stelzmann-Strasse 26, 50931 Cologne, Germany; Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases (CECAD), Center for Molecular Medicine Cologne (CMMC), University of Cologne, Joseph-Stelzmann-Strasse 26, 50931 Cologne, Germany.
Abstract:
The tumor protein TP53 gene, encoding the cellular tumor antigen p53, is the single most frequently mutated gene in human cancers. p53 plays a central role in responding to DNA damage and determines the outcome of the DNA damage checkpoint response by regulating cell cycle arrest and apoptosis. As a consequence of this function, dysfunctional p53 results in cells that, despite a damaged genome, continue to proliferate thus fueling malignant transformation. New insights have recently been gained into the complexity of the p53 regulation of the DNA damage response (DDR) and how it impacts a wide variety of cellular processes. In addition to cell-autonomous signaling mechanisms, non-cell-autonomous regulatory inputs influence p53 activity, which in turn can have systemic consequences on the organism. New inroads have also been made toward therapeutic targeting of p53 that for a long time has been anticipated.
Insights
The tumor protein p53 (TP53) gene is crucial for DNA damage response, regulating cell cycle arrest and apoptosis. Its dysfunction fuels cancer by allowing damaged cells to proliferate, highlighting its therapeutic potential.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- The TP53 gene, encoding cellular tumor antigen p53, is the most frequently mutated gene in human cancers.
- p53 is a critical tumor suppressor involved in DNA damage response (DDR), regulating cell cycle arrest and apoptosis.
- Dysfunctional p53 permits proliferation of cells with damaged genomes, driving malignant transformation.
Purpose of the Study:
- To explore recent insights into the complex regulation of p53 in the DNA damage response.
- To understand how p53 activity is influenced by non-cell-autonomous factors and its systemic effects.
- To review advancements in the therapeutic targeting of p53.
Main Methods:
- Literature review of recent findings on p53 regulation and DDR.
- Analysis of cell-autonomous and non-cell-autonomous mechanisms affecting p53.
- Examination of emerging therapeutic strategies targeting p53.
Main Results:
- p53's role in DDR is more complex than previously understood, impacting diverse cellular processes.
- Non-cell-autonomous regulatory inputs significantly influence p53 activity with organism-wide consequences.
- New therapeutic avenues for targeting p53 in cancer treatment are emerging.
Conclusions:
- Understanding the intricate regulation of p53 is key to comprehending cancer development.
- Targeting p53 offers promising therapeutic strategies for various cancers.
- Further research into p53's multifaceted roles will advance cancer treatment and prevention.
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