Vitamin E prevents oxidation of antiapoptotic proteins in neuronal cells

Joungil Choi, Craig C. Conrad, Rong Dai, Christina A. Malakowsky, John M. Talent, Christopher A. Carroll, Susan T. Weintraub, Robert W. Gracy

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


Oxidative damage to neuronal proteins appears to be central to the toxicity associated with a number of neuropathologies, including Alzheimer's disease. We have examined this by using oxidative stress to induce apoptosis in a mouse hippocampal neuronal cell line (HT-22). Oxidatively modified proteins were measured by high-resolution two-dimensional gel electrophoresis coupled with oxidation-specific immunostains. Under these conditions the oxidatively stressed cells undergo apoptosis, and specific proteins are oxidized. The three proteins that appeared to be most susceptible to oxidation were identified by mass spectrometry. Those oxidized proteins are heat shock protein 60 and vimentin, both believed to function as antiapoptotic proteins, and a third protein with sequence homology to hemoglobin α-chain. When the cells were pretreated with vitamin E, these proteins were not oxidized and the cells did not undergo apoptosis.

Original languageEnglish (US)
Pages (from-to)73-77
Number of pages5
Issue number1
StatePublished - Jan 1 2003


  • Heat shock protein
  • Mass spectroscopy
  • Protein oxidation
  • Two-dimensional gel electrophoresis
  • Vimentin

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology


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