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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

Role of P53 functionality in the genotoxicity of metronidazole and its hydroxy metabolite

D Menéndez1, A Bendesky, E Rojas

  • 1Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico.

Mutation Research
|April 6, 2002
PubMed

Insights

The antiparasitic drug metronidazole (MTZ) and its metabolite can increase cell proliferation and DNA damage, particularly in cells lacking functional P53. The MTZ hydroxy metabolite shows potential carcinogenicity and warrants further investigation.

Area of Science:

  • Genetics
  • Pharmacology
  • Toxicology

Background:

  • P53 protein is crucial for maintaining genetic stability by regulating cell cycle arrest, DNA repair, and apoptosis.
  • The antiparasitic drug metronidazole (MTZ) has been observed to increase lymphocyte proliferation and induce chromosomal aberrations.

Purpose of the Study:

  • To investigate the effects of metronidazole (MTZ) and its hydroxy metabolite on cell proliferation and micronuclei (MN) induction in cell lines with varying P53 functionality.
  • To assess the potential carcinogenicity of MTZ and its metabolite, particularly in relation to P53 status.

Main Methods:

  • Utilized cell lines with different P53 functional states.
  • Treated cells with MTZ or its hydroxy metabolite in a dose-dependent manner.
  • Assessed cell proliferation capacity and quantified micronuclei (MN) formation as a marker of DNA damage.

Main Results:

  • MTZ increased proliferation in P53-functional cells without affecting P53 levels or MN induction.
  • The MTZ hydroxy metabolite dose-dependently increased P53 and MN formation, but not cell proliferation, in P53-functional cells.
  • Both MTZ and its metabolite increased cell proliferation and MN formation in P53-deficient cell lines.

Conclusions:

  • The MTZ hydroxy metabolite may act as a potential carcinogen, especially in the context of P53 deficiency, and requires further study.
  • The findings highlight the differential effects of MTZ and its metabolite based on P53 status, suggesting a role in genotoxicity and potential carcinogenicity.

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