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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-A pro-apoptotic signal transducer involved in AIDS

Maria Castedo1, Jean-Luc Perfettini, Mauro Piacentini

  • 1CNRS-UMR8125, Institut Gustave Roussy, 39 rue Camille-Desmoulins, F-94805 Villejuif, France.

Biochemical and Biophysical Research Communications
|May 4, 2005
PubMed

Insights

The p53 protein, a known tumor suppressor, plays a key role in immune system destruction during human immunodeficiency virus (HIV-1) infection. Targeting p53 offers a potential new therapeutic strategy for acquired immunodeficiency syndrome (AIDS).

Area of Science:

  • Oncology
  • Immunology
  • Virology

Background:

  • p53 is a critical tumor suppressor protein inducing apoptosis.
  • Genetic or epigenetic inactivation of p53 affects approximately 50% of human cancers.
  • Recent evidence implicates p53 in the immune system destruction caused by HIV-1 infection.

Purpose of the Study:

  • To investigate the role of p53 in HIV-1-mediated immune system damage.
  • To explore p53 as a potential therapeutic target for AIDS treatment.

Main Methods:

  • Analysis of p53 activating phosphorylations in cells from HIV-1 carriers.
  • Measurement of p53 target gene expression (e.g., PUMA) in HIV-1 carriers.
  • In vitro studies assessing the role of p53 and PUMA in HIV-1-induced cell death, including Env-mediated apoptosis.

Main Results:

  • p53 showed activating phosphorylations in immune cells of HIV-1 carriers.
  • Overexpression of p53 target genes, such as PUMA, was observed in HIV-1 carriers.
  • In vitro experiments confirmed p53 and PUMA as rate-limiting factors in HIV-1-induced cell death, particularly via the HIV-1 Envelope (Env) and gp120.

Conclusions:

  • p53 activation and its target genes are involved in HIV-1-induced immune cell death.
  • p53 may be a novel therapeutic target for acquired immunodeficiency syndrome (AIDS).

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