Induction of ferroptosis and mitochondrial dysfunction by oxidative stress in PC12 cells

Sci Rep. 2018 Jan 12;8(1):574. doi: 10.1038/s41598-017-18935-1.

Abstract

Neurodegenerative diseases (NDD) are typically associated with neuron loss in nervous system areas. Interventions with related death mechanisms may ameliorate NDD progression. Oxidative stress plays an important role in NDD cell death routines. However, tert-butylhydroperoxide (t-BHP), a widely used oxidative stress stimulus, induces neural cell death through a mechanism that remains elusive. In our study, the ferroptosis marker events occurred after co-treatment with 100 μM t-BHP for 1 h, all of which were reversed in the presence of the ferroptosis inhibitor ferrostatin-1 (Fer-1) and the iron chelator deferoxamine, implying the occurrence of ferroptosis. Moreover, mitochondrial dysfunction accompanied by a decreased in membrane potential and ATP production, increased mitochondrial ROS generation. Furthermore, this mitochondrial dysfunction could be reversed by Fer-1. In addition, JNK1/2 and ERK1/2 were activated upstream of the ferroptosis and mitochondrial dysfunction. In summary, these data suggest that ferroptosis, coupled with mitochondrial dysfunction, was involved in t-BHP-induced PC12 death. JNK1/2 and ERK1/2 played important roles in t-BHP-induced cell death. Overall, this study might provide clues to the oxidative stress-based strategies for cell protection in NDD.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adenosine Triphosphate / metabolism*
  • Animals
  • Cell Death
  • Cell Survival / drug effects
  • Cyclohexylamines / pharmacology
  • Deferoxamine / pharmacology
  • Gene Expression Regulation / drug effects
  • MAP Kinase Signaling System / drug effects
  • Membrane Potential, Mitochondrial / drug effects
  • Mitochondria / drug effects*
  • Mitochondria / metabolism
  • Oxidative Stress
  • PC12 Cells / cytology
  • PC12 Cells / drug effects*
  • PC12 Cells / metabolism
  • Phenylenediamines / pharmacology
  • Rats
  • Reactive Oxygen Species / metabolism*
  • tert-Butylhydroperoxide / pharmacology*

Substances

  • Cyclohexylamines
  • Phenylenediamines
  • Reactive Oxygen Species
  • ferrostatin-1
  • Adenosine Triphosphate
  • tert-Butylhydroperoxide
  • Deferoxamine