Environmental Science and Pollution Research

, Volume 23, Issue 9, pp 8441–8452 | Cite as

Evidence of hormesis on human neuronal SK-N-BE cells treated with sodium arsenate: impact at the mitochondrial level

  • Wafa Kharroubi
  • Samia Haj Ahmed
  • Thomas Nury
  • Pierre Andreoletti
  • Zohra Haouas
  • Amira Zarrouk
  • Rachid Sakly
  • Mohamed Hammami
  • Gérard Lizard
Research Article

Abstract

Exposure of human neuronal SK-N-BE cells to sodium arsenate (AsV 0.1–400 μM; 48 h) induced a biphasic toxic effect evoking hormesis. Indeed, at low concentrations, AsV stimulates cell proliferation visualized by phase contrast microscopy, whereas at high concentrations, an induction of cell death associated with a loss of cell adhesion was observed. These side effects were confirmed with crystal violet test, cell cycle analysis, evaluation of the percentage of Ki67 positive cells, and staining with propidium iodide. The impact of AsV on mitochondrial functions, which was determined by the MTT assay, the measurement of mitochondrial transmembrane potential with DiOC6(3), and the rate of mitochondrial ATP, also support an hormesis process. In addition, in the presence of high concentrations of AsV, a significant decrease of the protein expression of OXPHOS complexes of the respiratory chain was observed by western blot supporting that AsV-induced cell death is associated with mitochondrial alterations. Therefore, there are some evidences of hormesis on AsV-treated SK-N-BE cells, and at high concentrations, the mitochondria are a target of toxicity induced by AsV.

Keywords

Sodium arsenate Human neuronal SK-NB-E Mitochondrial dysfunctions OXPHOS complexes 

Abbreviations

AsV

Sodium arsenate

DMEM

Dulbecco’s Modified Eagle Medium

PI

Propidium iodide

ΔΨm

Mitochondrial transmembrane potential

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Wafa Kharroubi
    • 1
    • 2
  • Samia Haj Ahmed
    • 1
    • 2
  • Thomas Nury
    • 1
  • Pierre Andreoletti
    • 1
  • Zohra Haouas
    • 3
  • Amira Zarrouk
    • 1
    • 2
  • Rachid Sakly
    • 2
  • Mohamed Hammami
    • 2
  • Gérard Lizard
    • 1
  1. 1.University Bourgogne Franche Comté, Université de Bourgogne Laboratoire Bio-PeroxIL, ‘Biochimie du Peroxysome, Inflammation et Métabolisme Lipidique’ EA7270 / INSERM, Faculté des Sciences GabrielDijonFrance
  2. 2.Laboratoire de biochimie « Nutrition -aliments fonctionnels et santé vasculaire « LR- NAFS LR12ES05, Faculté de MédecineMonastirTunisie
  3. 3.Unité de recherche de génétique « Histologie et de Cytogénétique 02/UR/ 08–03 »Faculté de Médecine de MonastirMonastirTunisie

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