Immunological identification of the heart myoglobin radical formed by hydrogen peroxide |
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Authors: | Detweiler Charles D Deterding Leesa J Tomer Kenneth B Chignell Colin F Germolec Dori Mason Ronald P |
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Affiliation: | Laboratory of Pharmacology and Chemistry, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA. |
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Abstract: | This study reports the detection of protein free radicals using the specific free radical reactivity of nitrone spin traps in conjunction with nitrone-antibody specificity. Polyclonal antibodies were developed that bind to protein adducts of the nitrone spin-trap 5,5-dimethyl-1-pyrroline N-oxide (DMPO). The antibodies were used to detect DMPO protein adducts produced on horse myoglobin resulting from self-peroxidation. Western blot analysis demonstrates that myoglobin forms the predominant radical-derived nitrone adduct in rat heart supernatant. |
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