Abstract
Oxidative stress may cause a wide variety of free radical reactions to produce deleterious modifications in membranes, proteins, enzymes, and DNA. Reactive Oxygen Species (ROS) generated by myeloperoxidase (MPO) can induce lipid peroxidation and also play an important role in the generation of reactive chlorinating and brominating species. As the universal biomarkers, chemical, and immunochemical approach on oxidatively modified and halogenated tyrosines has been carried out. As amido-type adduct biomarkers, chemical, and immunochemical evaluation of hexanoyl- and propanoyl-lysines, hexanoyl- and propanoyl-dopamines and phospholipids were prepared and developed for application of evaluation of novel antioxidative functional food factors. We have also involved in application of oxidatively modified DNAs such as 8-hydroxy- and 8-halogenated deoxyguanosines as the useful biomarkers for age-related diseases using both in vitro and in vivo systems. Application of these oxidative stress biomarkers for novel type of functional food development and recent approach for development of novel evaluation systems are also discussed.
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