Ageing of T-dependent B cell responses - Université Toulouse III - Paul Sabatier - Toulouse INP
Article Dans Une Revue Immunology Letters Année : 2021

Ageing of T-dependent B cell responses

Résumé

The human immune system is in continuous interaction with environmental factors (pathogens, exercise, stress, pollutants, diet, vaccines, and therapeutics) that condition its efficiency by promoting or moderating multiple immune mechanisms. While the deleterious impact of external factors can be avoided or limited, the immune system itself grows weaker with age. Immune cells persist in the elderly, and the observed decline of cellular immunity is related to cellular senescence. Immunosenescence, which affects both T and B cells, erodes lymphocyte-dependent responses to vaccines and pathogens. Germinal centers (GCs), the organized lymphoid structures where B cells engage in affinity maturation, are regulated by follicular helper (Tfh) and follicular regulatory (Tfr) T cells, the major T cell components of GCs. This review discusses how age-related changes affect Tfh and Tfr cells as key components of B cell immunity, and how they ultimately shape the response of the ageing immune system to vaccines and infectious challenges.

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hal-03776023 , version 1 (24-04-2023)

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Fanny Martinez, Julien Novarino, José Enrique Mejía, Nicolas Fazilleau, Meryem Aloulou. Ageing of T-dependent B cell responses. Immunology Letters, 2021, 233, pp.97-103. ⟨10.1016/j.imlet.2021.03.012⟩. ⟨hal-03776023⟩
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