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Production and Detection of Reactive Oxygen Species ROS in Cancers
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Production and Detection of Reactive Oxygen Species ROS in Cancers

Published on: November 21, 2011

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Chitosan gold nanoparticles induce cell death in HeLa and MCF-7 cells through reactive oxygen species production

Ana Carolina Martínez-Torres1, Diana G Zarate-Triviño1, Helen Yarimet Lorenzo-Anota1

  • 1Laboratory of Immunology and Virology, Faculty of Biological Sciences, Autonomous University of Nuevo Leon, Monterrey, Mexico.

International Journal of Nanomedicine
|June 19, 2018
PubMed
Abstract

Insights

Chitosan gold nanoparticles (CH-AuNPs) show selective toxicity against cervical and breast cancer cells, sparing normal cells. Their anticancer effect relies on reactive oxygen species (ROS) production, offering new therapeutic strategies.

Area of Science:

  • Nanomedicine
  • Cancer Therapy

Background:

  • Gold nanoparticles (AuNPs) are increasingly explored for disease detection and treatment.
  • AuNPs stabilized with chitosan (CH) exhibit potential antitumor effects, possibly selective for cancer cells.

Purpose of the Study:

  • To synthesize and characterize sodium citrate-AuNPs and CH-AuNPs.
  • To evaluate the cytotoxicity and anticancer mechanisms of CH-AuNPs in cervical (HeLa) and breast (MCF-7) cancer cells, and normal peripheral blood mononuclear cells (PBMCs).

Main Methods:

  • Synthesis of 3-10 nm sodium citrate-AuNPs and CH-AuNPs.
  • Cytotoxicity assays on HeLa, MCF-7, and PBMCs.
  • Evaluation of clonogenic potential, cell cycle, nuclear alterations, caspase dependence, and ROS production in cancer cells upon CH-AuNPs exposure.

Main Results:

  • CH-AuNPs demonstrated dose-dependent cytotoxicity in HeLa and MCF-7 cells, with minimal impact on PBMCs.
  • Sodium citrate-AuNPs showed no significant cytotoxic effects.
  • CH-AuNPs inhibited clonogenic potential without inducing cell cycle arrest or nuclear alterations.
  • Cell death mechanisms varied: caspase-dependent in HeLa cells and caspase-independent in MCF-7 cells.
  • Reactive oxygen species (ROS) production was essential for CH-AuNPs-induced cell death in both cancer cell lines.

Conclusions:

  • CH-AuNPs exhibit selectivity towards HeLa and MCF-7 cancer cells over normal PBMCs.
  • ROS production is a critical and conserved component of the cell death pathway induced by CH-AuNPs.
  • These findings support the development of CH-AuNPs for novel anticancer pharmacological strategies.
Keywords:
AuNPsPBMCROScancercell cyclenuclear alterations

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