The biological process where the nervous system, including the brain, is shielded from damage caused by reactive oxygen species, often referred to as free radicals. This defense mechanism is crucial for maintaining neuronal integrity and optimal cognitive function throughout the lifespan. Hormonal balance plays a significant role in supporting this intrinsic protective capacity.
Origin
This concept merges the physiological term “antioxidation,” meaning the inhibition of oxidation, with “neural protection,” which refers to mechanisms and strategies used to save neurons from injury or degeneration. It arises from the intersection of neurobiology, redox biology, and clinical endocrinology. The understanding of how endogenous and exogenous compounds protect the nervous system forms the basis of this term.
Mechanism
It involves the upregulation of endogenous antioxidant enzymes like superoxide dismutase and glutathione peroxidase, and the action of exogenous antioxidants. These molecules neutralize free radicals, preventing lipid peroxidation and DNA damage within neuronal cells. Hormones, particularly steroids, can modulate the expression of these protective enzymes, directly influencing the central nervous system’s resilience against oxidative stress.
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