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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

Restoration of the tumor suppressor function to mutant p53 by a low-molecular-weight compound

Vladimir J N Bykov1, Natalia Issaeva, Alexandre Shilov

  • 1Karolinska Institutet, Department of Oncology-Pathology, Cancer Center Karolinska, Karolinska Hospital, Stockholm, Sweden.

Nature Medicine
|March 5, 2002
PubMed

Insights

Researchers identified PRIMA-1, a compound that restores the function of mutant p53 proteins. This reactivation triggers cancer cell death, offering a potential new strategy for developing anticancer drugs targeting tumors with p53 mutations.

Area of Science:

  • Oncology
  • Molecular Biology
  • Drug Discovery

Background:

  • The tumor suppressor p53 is crucial for inhibiting tumor growth by inducing apoptosis.
  • Mutations in the p53 gene are prevalent in over 50% of human cancers.
  • Reactivating mutant p53 could potentially eliminate tumor cells by triggering apoptosis.

Purpose of the Study:

  • To identify compounds that can restore wild-type function to mutant p53.
  • To evaluate the therapeutic potential of such compounds in cancer treatment.

Main Methods:

  • Screening a library of low-molecular-weight compounds.
  • Testing compound efficacy in inducing apoptosis in human tumor cells.
  • Assessing the restoration of p53 DNA binding and conformation in vitro and in vivo.
  • Evaluating antitumor effects and toxicity in mouse models.

Main Results:

  • One compound, PRIMA-1, was identified that restores transcriptional transactivation function to mutant p53.
  • PRIMA-1 restored sequence-specific DNA binding and active conformation to both DNA contact and structural p53 mutants.
  • In vivo studies demonstrated significant antitumor effects with no apparent toxicity.

Conclusions:

  • PRIMA-1 effectively reactivates mutant p53, leading to cancer cell apoptosis.
  • This molecule shows promise as a lead compound for novel anticancer drug development targeting p53 mutations.

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