PreprintCited by 31Telomeres, Telomerase, and SenescenceGenetics, Aging, and Longevity in Model OrganismsSirtuins and Resveratrol in Medicine

Ribosomal S6 kinase 1 regulates ‘inflammaging’ via the senescence secretome

Open access
Gallage, Suchira, Irvine, Elaine E., Pedroni, Silvia M.A., Barragan Avila, Jose Efren, Khadayate, Sanjay, Pombo, Joaquim, Brookes, Sharon, Heide, Danijela +7 more·2023·Nature Aging

Preprint — published as 10.1038/s43587-024-00695-z

Abstract

Inhibition of the nutrient-responsive mTOR (mammalian target of rapamycin) signalling pathway including the key downstream effector S6 kinase 1 (S6K1) extends lifespan and improves healthspan in mice. However, the underlying mechanisms contributing to the broad range of age-related benefits observed with loss of S6K1 signalling are unclear. Cellular senescence is a stable growth arrest accompanied by an inflammatory phenotype (termed the senescence-associated secretory phenotype, or SASP). While both cellular senescence and SASP-mediated chronic inflammation contribute to age-related pathology, the specific role of S6K1 signalling in these processes has not been determined. Here, focussing on mouse liver, a key target tissue for the beneficial metabolic effects of loss of S6K1 signalling, we show that S6K1 deletion does not reduce senescence but ameliorates inflammation and immune cell infiltration in aged livers. Using human and mouse models of senescence, we demonstrated that reduced inflammation is a liver-intrinsic effect associated with S6K deletion. Furthermore, gene expression analysis suggested that downregulated cGAS/STING and IRF3 activation might mediate the impaired SASP observed upon S6K deletion. Using a hepatic oncogene induced senescence model, we showed in viv o that S6K1 deletion results in reduced IRF3 activation, impaired production of cytokines such as IL1ý and reduced immune infiltration. Overall, deletion of S6K reduces inflammation in the liver suggesting that suppression of the inflammatory SASP by loss of S6K could contribute to explain the beneficial effects of inhibiting this pathway on healthspan and lifespan.

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Authors
Gallage, S., Irvine, E. E., Pedroni, S. M. A., Barragan Avila, J. E., Khadayate, S., Pombo, J., Brookes, S., Heide, D., Dharmalingham, G., Choudhury, A. I., Herranz, N., Vernia, S., Heikenwalder, M., Gil, J., & Withers, D. J.
Affiliations
  • German Cancer Research Center (DE)
  • Imperial College London (GB)
Corresponding author
  • Gil, Jesús
  • Withers, Dominic J.
Venue
Nature Aging
Publisher
openRxiv
Published
2023-10-20
Volume
4
Issue
11
Pages
1544-1561
ISSN
2662-8465 (ISSN-L)
OpenAlex
W4402027652
Cited by
31
References
61
Citations by year
2026: 15 · 2025: 14 · 2024: 2
FWCI
8.82
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Nature Aging (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DIGITAL.CSIC (Spanish National Research Council (CSIC)) (submittedVersion, cc-by-nc)
Funders
  • Wellcome Trust (098565/Z/12/Z)
  • Cancer Research UK (C15075/A28647)
  • Research Councils UK (MC-A654-5QB40)
  • Fonds Wetenschappelijk Onderzoek (30826052)
  • Vlaamse regering
  • Medical Research Council (MC-A654-5QB40, MC-U120085810)
Topics
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
  • Health Sciences › Medicine › Geriatrics and Gerontology › Sirtuins and Resveratrol in Medicine
Keywords
S6 kinase 1, inflammaging, senescence-associated secretory phenotype, cellular senescence, liver aging, IRF3 activation, IL-1β, immune cell infiltration, myeloid cells, hepatocytes, healthspan, lifespan extension
MeSH terms
Senescence-Associated Secretory Phenotype, Aging, Animals, Humans, Inflammation, Liver, Male, Cellular Senescence, Mice, Knockout, Hepatocytes, Ribosomal Protein S6 Kinases, 90-kDa, Interferon Regulatory Factor-3, Mice, Interleukin-1beta

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