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The Reactive Species Interactome in the Brain

期刊

ANTIOXIDANTS & REDOX SIGNALING
卷 35, 期 14, 页码 1176-1206

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MARY ANN LIEBERT, INC
DOI: 10.1089/ars.2020.8238

关键词

brain; distress; eustress; RSI; physiology; pathology

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Helmut Sies introduced three definitions of reactive species challenges: oxidative stress, oxidative eustress, and oxidative distress. The Reactive Species Interactome (RSI) is a new redox regulatory system that identifies reactive species families and their interactions. Future studies should focus on understanding the contributions of reactive species through identification, concentration, and interactions, especially in the brain.
Significance: Redox pioneer Helmut Sies attempted to explain reactive species' challenges faced by organelles, cells, tissues, and organs via three complementary definitions: (i) oxidative stress, that is, the disturbance in the prooxidant-antioxidant defense balance in favor of the prooxidants; (ii) oxidative eustress, the low physiological exposure to prooxidants; and (iii) oxidative distress, the supraphysiological exposure to prooxidants. Recent Advances: Identification, concentration, and interactions are the most important elements to improve our understanding of reactive species in physiology and pathology. In this context, the reactive species interactome (RSI) is a new multilevel redox regulatory system that identifies reactive species families, reactive oxygen species (ROS), reactive nitrogen species (RNS), and reactive sulfur species, and it integrates their interactions with their downstream biological targets. Critical Issues: We propose a united view to fully combine reactive species identification, oxidative eustress and distress, and the RSI system. In this view, we also propose including the forgotten reactive carbonyl species, an increasingly rediscovered reactive species family related to the other reactive families, and key enzymes within the RSI. We focus on brain physiology and pathology to demonstrate why this united view should be considered. Future Directions: More studies are needed for an improved understanding of the contributions of reactive species through their identification, concentration, and interactions, including in the brain. Appreciating the RSI in its entirety should unveil new molecular players and mechanisms in physiology and pathology in the brain and elsewhere.

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