Cellular senescence is a double-edged sword in regulating aged immune responses to influenza.

Autor: Torrance BL; UConn Center on Aging, University of Connecticut School of Medicine, Farmington, Connecticut, USA.; Department of Immunology, University of Connecticut School of Medicine, Farmington, Connecticut, USA., Cadar AN; UConn Center on Aging, University of Connecticut School of Medicine, Farmington, Connecticut, USA.; Department of Immunology, University of Connecticut School of Medicine, Farmington, Connecticut, USA., Panier HA; Department of Medicine, University of Connecticut School of Medicine, Farmington, Connecticut, USA., Martin DE; UConn Center on Aging, University of Connecticut School of Medicine, Farmington, Connecticut, USA.; Department of Immunology, University of Connecticut School of Medicine, Farmington, Connecticut, USA., Lorenzo EC; UConn Center on Aging, University of Connecticut School of Medicine, Farmington, Connecticut, USA., Jellison ER; Department of Immunology, University of Connecticut School of Medicine, Farmington, Connecticut, USA., Bartley JM; UConn Center on Aging, University of Connecticut School of Medicine, Farmington, Connecticut, USA.; Department of Immunology, University of Connecticut School of Medicine, Farmington, Connecticut, USA., Haynes L; UConn Center on Aging, University of Connecticut School of Medicine, Farmington, Connecticut, USA.; Department of Immunology, University of Connecticut School of Medicine, Farmington, Connecticut, USA.
Jazyk: angličtina
Zdroj: Aging cell [Aging Cell] 2024 Jul; Vol. 23 (7), pp. e14162. Date of Electronic Publication: 2024 Apr 30.
DOI: 10.1111/acel.14162
Abstrakt: Clearance of senescent cells has demonstrated therapeutic potential in the context of chronic age-related diseases. Little is known, however, how clearing senescent cells affects the ability to respond to an acute infection and form quality immunological memory. We aimed to probe the effects of clearing senescent cells in aged mice on the immune response to influenza (flu) infection. We utilized a p16 trimodality reporter mouse model (p16-3MR) to allow for identification and selective clearance of p16-expressing cells upon administration of ganciclovir (GCV). While p16-expressing cells may exacerbate dysfunctional responses to a primary infection, our data suggest they may play a role in fostering memory cell generation. We demonstrate that although clearance of p16-expressing cells enhanced viral clearance, this also severely limited antibody production in the lungs of flu-infected aged mice. 30 days later, there were fewer flu-specific CD8 memory T cells and lower levels of flu-specific antibodies in the lungs of GCV-treated mice. Furthermore, GCV-treated mice were unable to mount an optimal memory response and demonstrated increased viral load following heterosubtypic challenge. These results suggest that targeting senescent cells may potentiate primary responses while limiting the ability to form durable and protective immune memory with age.
(© 2024 The Authors. Aging Cell published by Anatomical Society and John Wiley & Sons Ltd.)
Databáze: MEDLINE
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