Cited by 567Immune Response and InflammationImmune Cell Function and InteractionImmune responses and vaccinations

Innate immunosenescence: Effect of aging on cells and receptors of the innate immune system in humans

Solana, Rafael, Tarazona, Raquel, Gayoso, Inmaculada, Lesur, Olivier, Dupuis, Gilles, Fulop, Tamas·2012·Seminars in Immunology

Abstract

Components of the innate immune response, including neutrophils and macrophages, are the first line of defense against infections. Their role is to initiate an inflammatory response, phagocyte and kill pathogens, recruit natural killer cells (NK), and facilitate the maturation and migration of dendritic cells that will initiate the adaptive immune response. Extraordinary advances have been made in the last decade on the knowledge of the receptors and mechanisms used by cells of the innate immunity not only to sense and eliminate the pathogen but also to communicate each other and collaborate with cells of adaptive immunity to mount an effective immune response. The analysis of innate immunity in elderly humans has evidenced that aging has a profound impact on the phenotype and functions of these cells. Thus altered expression and/or function of innate immunity receptors and signal transduction leading to defective activation and decreased chemotaxis, phagocytosis and intracellular killing of pathogens have been described. The phenotype and function of NK cells from elderly individuals show significant changes that are compatible with remodeling of the different NK subsets, with a decrease in the CD56bright subpopulation and accumulation of the CD56dim cells, in particular those differentiated NK cells that co-express CD57, as well as a decreased expression of activating natural cytotoxicity receptors. These alterations can be responsible of the decreased production of cytokines and the lower per-cell cytotoxicity observed in the elderly. Considering the relevance of these cells in the initiation of the immune response, the possibility to reactivate the function of innate immune cells should be considered in order to improve the response to pathogens and to vaccination in the elderly.

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Crossref · 10.1016/j.smim.2012.04.008

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  • The reduced robustness of myeloid-biased stem cells could explain age-related deficiencies in mature myeloid cells such as neutrophils and macrophages.

    “which in turn could underlie the numerous age-related deficiencies observed in mature myeloid cells such as neutrophils and macrophages (25,26).”

    From Causes, consequences, and reversal of immune system aging (2013) · cites this paper as [25]

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Authors
Solana, R., Tarazona, R., Gayoso, I., Lesur, O., Dupuis, G., & Fulop, T.
Affiliations
  • Instituto Maimónides de Investigación Biomédica de Córdoba (ES)
  • Universidad de Extremadura (ES)
  • Université de Sherbrooke (CA)
Venue
Seminars in Immunology
Publisher
Elsevier BV
Published
2012-10
Volume
24
Issue
5
Pages
331-341
ISSN
1044-5323 (ISSN-L)
OpenAlex
W1971907346
Cited by
567
References
158
Citations by year
2026: 26 · 2025: 36 · 2024: 27 · 2023: 44 · 2022: 48 · 2021: 50 · 2020: 49 · 2019: 49 · 2018: 47 · 2017: 35 · 2016: 41 · 2015: 33 · 2014: 40 · 2013: 36 · 2012: 4
FWCI
3.26
Type
journal article
Language
en
Open access
closed
Locations
  • Seminars in Immunology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Université de Sherbrooke
  • Ministerio de Ciencia e Innovación
  • Junta de Extremadura
  • Canadian Institutes of Health Research (106634, 106701)
  • European Regional Development Fund
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Cell Function and Interaction
  • Life Sciences › Immunology and Microbiology › Immunology › Immune responses and vaccinations
Keywords
immunosenescence, innate immunity, aging, natural killer cells, NK cell subsets, CD57, natural cytotoxicity receptors, neutrophils, macrophages, innate immune receptors, phagocytosis, chemotaxis, cytokine production, older adults
MeSH terms
Animals, Dendritic Cells, Humans, Immunity, Innate, Neutrophils, Receptors, Immunologic, Cellular Senescence

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