Immune system modulation in aging: Molecular mechanisms and therapeutic targets
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Copyright © 2022 Cisneros, García-Aguirre, Unzueta, Arrieta-Cruz, González-Morales, Domínguez-Larrieta, Tamez-González, Leyva-Gómez and Magaña.The function of the immune system declines during aging, compromising its response against pathogens, a phenomenon termed as ¿immunosenescence.¿ Alterations of the immune system undergone by aged individuals include thymic involution, defective memory T cells, impaired activation of naïve T cells, and weak memory response. Age-linked alterations of the innate immunity comprise perturbed chemotactic, phagocytic, and natural killing functions, as well as impaired antigen presentation. Overall, these alterations result in chronic low-grade inflammation (inflammaging) that negatively impacts health of elderly people. In this review, we address the most relevant molecules and mechanisms that regulate the relationship between immunosenescence and inflammaging and provide an updated description of the therapeutic strategies aimed to improve immunity in aged individuals.
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