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- W1994120449 abstract "Zinc is a relevant trace element for the efficiency of the entire immune system. The binding of zinc with some proteins, such as metallothioneins (MT) and alpha-2 macroglobulin (alpha-2M) is crucial for the immune efficiency during ageing and in age-related diseases, because these proteins may be involved in antagonistic pleiotropic effects. Indeed, the presence of chronic inflammation during ageing, generally, induces overexpression of these proteins that, due to their original biological function in fighting stressor agents, continuously sequester intracellular zinc. As a consequence, a low zinc ion availability may appear in aged organisms leading to impairments of the immune response at thymic and extrathymic levels with the risk of the appearance of age-related diseases. Therefore, MT and alpha-2M turn from protective in young-adult age to harmful agents in ageing following the basic assumption of an evolutionary theory of ageing, named the antagonistic pleiotropy, which suggests that a trade off between early beneficial effects and late negative outcomes can occur at a genetic and molecular level. On the other hand, some polymorphisms of MT (MT2A) and alpha-2M have been associated with atherosclerosis or Alzheimer disease, respectively. Physiological zinc supplementation in elderly restores the thymic endocrine activity and innate immune response (NK cell cytotoxicity) and increases the survival rate in old mice. Therefore, zinc supplementation is useful to achieve health longevity because these zinc-binding proteins may regain their original protective task against oxidative damage with, thus, a beneficial impact on immune response." @default.
- W1994120449 created "2016-06-24" @default.
- W1994120449 creator A5014227532 @default.
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- W1994120449 creator A5086502114 @default.
- W1994120449 date "2006-11-01" @default.
- W1994120449 modified "2023-10-17" @default.
- W1994120449 title "Zinc-binding proteins (metallothionein and α-2 macroglobulin) and immunosenescence" @default.
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