Cited by 182Pluripotent Stem Cells ResearchTelomeres, Telomerase, and SenescenceMesenchymal stem cell research

Senescence promotes in vivo reprogramming through p16INK4a and IL‐6

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Mosteiro, Lluc, Pantoja, Cristina, de Martino, Alba, Serrano, Manuel·2018·Aging Cell

Abstract

Summary: Cellular senescence is a damage response aimed to orchestrate tissue repair. We have recently reported that cellular senescence, through the paracrine release of interleukin‐6 (IL6) and other soluble factors, strongly favors cellular reprogramming by Oct4, Sox2, Klf4, and c‐Myc (OSKM) in nonsenescent cells. Indeed, activation of OSKM in mouse tissues triggers senescence in some cells and reprogramming in other cells, both processes occurring concomitantly and in close proximity. In this system, Ink4a/Arf‐null tissues cannot undergo senescence, fail to produce IL 6, and cannot reprogram efficiently; whereas p53‐null tissues undergo extensive damage and senescence, produce high levels of IL 6, and reprogram efficiently. Here, we have further explored the genetic determinants of in vivo reprogramming. We report that Ink4a, but not Arf, is necessary for OSKM‐induced senescence and, thereby, for the paracrine stimulation of reprogramming. However, in the absence of p53, IL6 production and reprogramming become independent of Ink4a, as revealed by the analysis of Ink4a/Arf/p53 deficient mice. In the case of the cell cycle inhibitor p21, its protein levels are highly elevated upon OSKM activation in a p53‐independent manner, and we show that p21‐null tissues present increased levels of senescence, IL 6, and reprogramming. We also report that Il6‐mutant tissues are impaired in undergoing reprogramming, thus reinforcing the critical role of IL 6 in reprogramming. Finally, young female mice present lower efficiency of in vivo reprogramming compared to male mice, and this gender difference disappears with aging, both observations being consistent with the known anti‐inflammatory effect of estrogens. The current findings regarding the interplay between senescence and reprogramming may conceivably apply to other contexts of tissue damage.

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  • While senescence is a barrier to reprogramming in vitro, the paracrine activities of senescent cells can promote the expression of stem cell markers and proliferation of neighbouring cells in vivo, and IL6 is a key player in driving this process.

    “While senescence is a barrier to reprogramming in vitro, the paracrine activities of senescent cells can promote the expression of stem cell markers and proliferation of neighbouring cells in vivo, 66–68 and IL6 is a key player in driving this process.”

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Authors
Mosteiro, L., Pantoja, C., de Martino, A., & Serrano, M.
Affiliations
  • Spanish National Cancer Research Centre (ES)
  • Tumor Suppression Group Spanish National Cancer Research Centre (CNIO) Madrid Spain
  • Institució Catalana de Recerca i Estudis Avançats (ES)
Corresponding author
Serrano, Manuel
Venue
Aging Cell
Publisher
Wiley
Published
2017-12-27
Volume
17
Issue
2
ISSN
  • 1474-9718 (ISSN-L)
  • 1474-9726
OpenAlex
W2780749587
Cited by
182
References
46
Citations by year
2026: 11 · 2025: 21 · 2024: 21 · 2023: 14 · 2022: 24 · 2021: 31 · 2020: 28 · 2019: 20 · 2018: 12
FWCI
6.67
Type
journal article
Language
en
Open access
Locations
  • Aging Cell (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (submittedVersion, cc-by)
Funders
  • European Regional Development Fund
  • H2020 European Research Council
  • Banco Santander
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Pluripotent Stem Cells Research
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Health Sciences › Medicine › Genetics › Mesenchymal stem cell research
Keywords
cellular senescence, cellular reprogramming, OSKM, p16INK4a, interleukin-6, p53, p21, paracrine signaling, tissue repair, sex differences, aging, estrogen
MeSH terms
Kruppel-Like Factor 4, Animals, Female, Humans, Interleukin-6, Cellular Senescence, Cyclin-Dependent Kinase Inhibitor p16, Mice, Cellular Reprogramming

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