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Vitamin E prevents oxidation of antiapoptotic proteins in neuronal cells
Author(s) -
Choi Joungil,
Conrad Craig C.,
Dai Rong,
Malakowsky Christina A.,
Talent John M.,
Carroll Christopher A.,
Weintraub Susan T.,
Gracy Robert W.
Publication year - 2003
Publication title -
proteomics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.26
H-Index - 167
eISSN - 1615-9861
pISSN - 1615-9853
DOI - 10.1002/pmic.200390011
Subject(s) - apoptosis , heat shock protein , oxidative stress , chemistry , biochemistry , neurodegeneration , microbiology and biotechnology , vimentin , biology , gene , immunohistochemistry , medicine , disease , pathology , immunology
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.