Oxidative stress cytotoxicity induced by platinum-doped magnesia nanoparticles in cancer cells

Biomed Pharmacother. 2021 Jun:138:111483. doi: 10.1016/j.biopha.2021.111483. Epub 2021 Mar 18.

Abstract

The aim of this study was to prepare, characterize, and determine the in vitro anticancer effects of platinum-doped magnesia (Pt/MgO) nanoparticles. The chemical compositions, functional groups, and size of nanoparticles were determined using X-ray diffraction, Fourier transform infrared spectroscopy, energy dispersive X-ray spectroscopy, transmission electron microscopy, and scanning electron microscopy. Pt/MgO nanoparticles were cuboid and in the nanosize range of 30-50 nm. The cytotoxicity of Pt/MgO nanoparticles was determined via the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay on the human lung and colonic cancer cells (A549 and HT29 respectively) and normal human lung and colonic fibroblasts cells (MRC-5 and CCD-18Co repectively). The Pt/MgO nanoparticles were relatively innocuous to normal cells. Pt/MgO nanoparticles downregulated Bcl-2 and upregulated Bax and p53 tumor suppressor proteins in the cancer cells. Pt/MgO nanoparticles also induced production of reactive oxygen species, decreased cellular glutathione level, and increased lipid peroxidation. Thus, the anticancer effects of Pt/MgO nanoparticles were attributed to the induction of oxidative stress and apoptosis. The study showed the potential of Pt/MgO nanoparticles as an anti-cancer compound.

Keywords: Apoptosis; Colonic cancer; Cytotoxicity; Lipid peroxidation; Lung cancer; Oxidative stress; Pt/MgO nanoparticles.

MeSH terms

  • A549 Cells
  • Cell Line, Tumor
  • Cell Survival / drug effects
  • Cell Survival / physiology
  • Cytotoxins / toxicity*
  • Dose-Response Relationship, Drug
  • HT29 Cells
  • Humans
  • Inflammation Mediators / metabolism
  • Magnesium Oxide / toxicity*
  • Metal Nanoparticles / toxicity*
  • Oxidative Stress / drug effects*
  • Oxidative Stress / physiology
  • Platinum / toxicity*

Substances

  • Cytotoxins
  • Inflammation Mediators
  • Magnesium Oxide
  • Platinum