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Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
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Yeast As a Chassis for Developing Functional Assays to Study Human P53
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Do Mutations Turn p53 into an Oncogene?

Consuelo Pitolli1,2, Ying Wang3, Mara Mancini1,4

  • 1Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133 Rome, Italy.

International Journal of Molecular Sciences
|December 15, 2019
PubMed
Summary
This summary is machine-generated.

Mutations in the tumor suppressor gene p53, found in half of human cancers, not only disable its protective functions but also promote cancer growth through new oncogenic activities.

Keywords:
TP53gain of functionmutant TP53oncogenic

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Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • The p53 gene is a critical tumor suppressor, frequently mutated in human cancers.
  • p53 mutations are found in approximately 50% of sporadic human cancers.
  • Germline mutations in p53 increase lifelong cancer susceptibility.

Purpose of the Study:

  • To review the mechanisms by which mutated p53 gains new pro-oncogenic functions.
  • To understand how these novel functions contribute to tumor development.

Main Methods:

  • Literature review of studies on p53 mutations and cancer.
  • Analysis of molecular mechanisms underlying p53 gain-of-function.
  • Review of experimental evidence linking p53 mutants to tumorigenesis.

Main Results:

  • p53 mutations not only inactivate tumor suppression but also confer oncogenic properties.
  • Mutated p53 can promote cell proliferation, survival, and genomic instability.
  • These gained functions actively drive tumor progression.

Conclusions:

  • Mutations in p53 have a dual role: loss of tumor suppression and gain of oncogenic functions.
  • Understanding these pro-oncogenic mechanisms is crucial for cancer therapy.
  • Targeting mutated p53 functions may offer new therapeutic strategies.