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Yeast As a Chassis for Developing Functional Assays to Study Human P53
Published on: August 4, 2019
p53: the attractive tumor suppressor in the cancer research field
Toshinori Ozaki1, Akira Nakagawara
1Laboratory of Anti-Tumor Research, Chiba Cancer Center Research Institute, Chiba 260-8717, Japan.
Abstract:
p53 is one of the most studied tumor suppressors in the cancer research field. Of note, over 50% of human tumors carry loss of function mutations, and thus p53 has been considered to be a classical Knudson-type tumor suppressor. From the functional point of view, p53 is a nuclear transcription factor to transactivate a variety of its target genes implicated in the induction of cell cycle arrest, DNA repair, and apoptotic cell death. In response to cellular stresses such as DNA damage, p53 is activated and promotes cell cycle arrest followed by the replacement of DNA lesions and/or apoptotic cell death. Therefore, p53 is able to maintain the genomic integrity to prevent the accumulation of genetic alterations, and thus stands at a crossroad between cell survival and cell death. In this paper, we describe a variety of molecular mechanisms behind the regulation of p53.
Insights
The tumor suppressor p53, a key protein in cancer, regulates cell cycle arrest, DNA repair, and apoptosis. This study details the molecular mechanisms governing p53
Area of Science:
- Oncology and Molecular Biology
- Cancer Research
Background:
- The p53 protein is a critical tumor suppressor, frequently mutated in over 50% of human cancers.
- p53 functions as a nuclear transcription factor, controlling genes involved in cell cycle arrest, DNA repair, and apoptosis.
Purpose of the Study:
- To elucidate the molecular mechanisms regulating the p53 tumor suppressor protein.
- To provide a comprehensive overview of p53's role in maintaining genomic integrity.
Main Methods:
- This paper reviews existing literature and research findings on p53.
- Focuses on the molecular pathways and regulatory networks impacting p53 activity.
Main Results:
- p53 activation in response to cellular stress (e.g., DNA damage) leads to cell cycle arrest and/or apoptosis.
- p53 plays a crucial role in preventing the accumulation of genetic alterations, thus acting as a gatekeeper of cell fate.
Conclusions:
- Understanding p53 regulation is vital for developing targeted cancer therapies.
- p53's function at the crossroads of cell survival and death highlights its significance in cancer prevention.
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