Hydrogen peroxide as a central redox signaling molecule in physiological oxidative stress: Oxidative eustress

Hydrogen peroxide emerged as major redox metabolite operative in redox sensing, signaling and redox regulation. Generation, transport and capture of H 2 O 2 in biological settings as well as their biological consequences can now be addressed. The present overview focuses on recent progress on metabolic sources and sinks of H 2 O 2 and on the role of H 2 O 2 in redox signaling under physiological conditions (1-10 nM), denoted as oxidative eustress. Higher concentrations lead to adaptive stress responses via master switches such as Nrf2/Keap1 or NF-B. Supraphysiological concentrations of H 2 O 2 ( > 100 nM) lead to damage of biomolecules, denoted as oxidative distress. Three questions are addressed: How can H 2…

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  National Foundation for Cancer Research