Positive Effect of Generation of Reactive Oxygen Species on the Human Organism
DOI:
https://doi.org/10.12775/mbs-2013-0011Keywords
reactive oxygen species, oxidant-antioxidant balance, human physiologyAbstract
For aerobes including human, the oxygen is an indispensable element for life, but simultaneously at too high concentration this gas becomes toxic. On the physiological level, the appropriate concentration of oxygen which is the source of reactive oxygen species (ROS), is necessary for the proper functioning of the organism. O2 and its derivatives as free radicals influence the maintenance of homeostasis of the human organism by acting at a cellular level on repair, protective, and energetic mechanisms, and at an intercellular level on communication between neighbouring cells and tissues. In turn, excess or impaired removal of ROS lead to so-called ‘oxidative stress’ that is associated with the pathogenesis of many diseases - from cancers to neurodegenerative, autoimmune and infectious diseases. In the paper the significance of only physiological level of reactive oxygen species in the human organism was presented.References
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