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Immuno-spin trapping: detection of protein-centered radicals.
MedLine Citation:
PMID:  23045116     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Protein-centered radicals are involved in biological oxidative damage induced by drugs, environmental hazards, and cellular reactive oxygen species. Presently, the technique most widely used to study protein-centered radicals is electron spin resonance (ESR; also known as electron paramagnetic resonance, EPR); used either directly or in combination with the spin-trapping technique. Protein-centered radicals may be trapped with the nitrone spin trap 5,5-dimethyl-1-pyrroline N-oxide (DMPO) forming DMPO-radical adducts. However, after a few minutes these adducts decay, often by oxidation to DMPO-protein radical-derived nitrone adducts, which are ESR-silent species. Because nitrone adducts are not free radicals and their formation involves the creation of a covalent linkage, they are stable long after the ESR signal decays. In the new alternative technique of immuno-spin trapping, nitrone adducts are detected by using an antibody, i.e., anti-DMPO, that recognizes their nitrone moiety. Immuno-spin trapping is a simple, reliable, affordable, sensitive, and specific approach to detecting protein-centered radicals, and its development brings the power of immunoassays to bear on the field of toxicology of free radical-mediated biological damage.
Authors:
Dario C Ramirez; Ronald P Mason
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Current protocols in toxicology / editorial board, Mahin D. Maines (editor-in-chief) ... [et al.]     Volume:  Chapter 17     ISSN:  1934-9262     ISO Abbreviation:  Curr Protoc Toxicol     Publication Date:  2005 Jun 
Date Detail:
Created Date:  2012-10-09     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9816330     Medline TA:  Curr Protoc Toxicol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  Unit17.7     Citation Subset:  IM    
Affiliation:
National Institute of Environmental Health Science, National Institutes of Health, Research Triangle Park, North Carolina.
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