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Yeast As a Chassis for Developing Functional Assays to Study Human P53
14:57

Yeast As a Chassis for Developing Functional Assays to Study Human P53

Published on: August 4, 2019

p53 polymorphism influences response in cancer chemotherapy via modulation of p73-dependent apoptosis

Daniele Bergamaschi1, Milena Gasco, Louise Hiller

  • 1Ludwig Institute for Cancer Research, Imperial College Faculty of Medicine, St. Mary's Campus, London, England.

Cancer Cell
|May 3, 2003
PubMed

Insights

The p53 gene polymorphism at codon 72 affects how well cancer cells respond to chemotherapy. The 72R variant is linked to lower treatment response rates in head and neck cancers.

Area of Science:

  • Molecular biology
  • Cancer research
  • Genetics

Background:

  • Intact p73 protein function is crucial for cellular sensitivity to anticancer drugs.
  • Inhibiting p73 function, through dominant-negative proteins or mutant p53, reduces apoptosis and cytotoxicity.
  • Mutant p53 proteins can inhibit p73 function.

Purpose of the Study:

  • To investigate the role of p53 codon 72 polymorphism in p73 inhibition.
  • To determine the clinical relevance of this polymorphism in head and neck cancer treatment response.

Main Methods:

  • Analysis of p53 codon 72 polymorphism (arginine 72R vs. proline 72P).
  • Assessment of p53 mutants' ability to inhibit p73 function.
  • Correlation of p53 polymorphism with clinical response to cisplatin-based chemo-radiotherapy in advanced head and neck cancer patients.

Main Results:

  • A polymorphism in p53 at codon 72 influences p73 inhibition by various p53 mutants found in squamous cancers.
  • Cancers with 72R p53 mutants showed lower response rates to cisplatin-based chemo-radiotherapy compared to those with 72P mutants.
  • This suggests a differential impact of p53 variants on treatment efficacy.

Conclusions:

  • The p53 codon 72 polymorphism plays a role in modulating p73 function and cellular response to anticancer agents.
  • This genetic variation may influence individual patient responsiveness to chemo-radiotherapy, particularly in head and neck cancers.
  • Understanding p53 polymorphism could aid in personalized cancer treatment strategies.

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