Alpha,beta-unsaturated aldehydes adducts to actin and albumin as potential biomarkers of carbonylation damage
- PMID: 17263903
- DOI: 10.1179/135100007X162310
Alpha,beta-unsaturated aldehydes adducts to actin and albumin as potential biomarkers of carbonylation damage
Abstract
Reactive carbonyl species (RCS) generated by lipid peroxidation, leading to protein carbonylation, are involved in several human diseases. Protein carbonylation constitutes one of the best characterised biomarker of oxidative damage to proteins. Albumin and actin have been identified, through different proteomic approaches, as the main protein targets for RCS in plasma and tissues, respectively. By a combined LC-MS/MS and computational approach, we have demonstrated their high reactivity towards alpha,beta-unsaturated aldehydes, and established the stoichiometry of reaction with HNE and acrolein, as well as the amino acid residues more susceptible to carbonyl attack. A new mass spectrometric approach, based on LC-MS/MS analysis of tag HNE/ACR-modified peptides of carbonylated albumin and actin is proposed, and the advantages over the conventional methods for RCS and RCS-adducted protein analyses discussed.
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