Cited by 3,753Telomeres, Telomerase, and SenescenceGenetics, Aging, and Longevity in Model OrganismsSirtuins and Resveratrol in Medicine

The DOI matches its Crossref record; 31 of the 32 references it cites were found in a registry or an index; 9 of the 19 sources its claims cite were checked for support.

Clearance of p16Ink4a-positive senescent cells delays ageing-associated disorders

Open access

Abstract

Advanced age is the main risk factor for most chronic diseases and functional deficits in humans, but the fundamental mechanisms that drive ageing remain largely unknown, impeding the development of interventions that might delay or prevent age-related disorders and maximize healthy lifespan. Cellular senescence, which halts the proliferation of damaged or dysfunctional cells, is an important mechanism to constrain the malignant progression of tumour cells. Senescent cells accumulate in various tissues and organs with ageing and have been hypothesized to disrupt tissue structure and function because of the components they secrete. However, whether senescent cells are causally implicated in age-related dysfunction and whether their removal is beneficial has remained unknown. To address these fundamental questions, we made use of a biomarker for senescence, p16(Ink4a), to design a novel transgene, INK-ATTAC, for inducible elimination of p16(Ink4a)-positive senescent cells upon administration of a drug. Here we show that in the BubR1 progeroid mouse background, INK-ATTAC removes p16(Ink4a)-positive senescent cells upon drug treatment. In tissues--such as adipose tissue, skeletal muscle and eye--in which p16(Ink4a) contributes to the acquisition of age-related pathologies, life-long removal of p16(Ink4a)-expressing cells delayed onset of these phenotypes. Furthermore, late-life clearance attenuated progression of already established age-related disorders. These data indicate that cellular senescence is causally implicated in generating age-related phenotypes and that removal of senescent cells can prevent or delay tissue dysfunction and extend healthspan.

Overview

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Written from the paper’s full text.

TL;DR

The paper describes INK-ATTAC, a transgenic mouse system that allows drug-inducible removal of p16Ink4a-positive senescent cells. In a BubR1 hypomorphic progeroid background, clearing these cells delayed or slowed several age-related phenotypes in adipose tissue, skeletal muscle, and eye, supporting a causal role for cellular senescence in age-related dysfunction.

Key findings

  • INK-ATTAC expression overlapped with endogenous p16Ink4a: GFP+ cells from aged BubR1H/H;INK-ATTAC adipose tissue had higher p16Ink4a and other senescence markers than GFP− cells, and AP20187 killed most rosiglitazone-induced senescent bone marrow cells within 48 h in vitro.
  • Life-long AP20187 treatment from 3 weeks of age in BubR1H/H;INK-ATTAC lines 3 and 5 delayed lordokyphosis and cataracts, increased muscle fibre diameter, improved treadmill exercise duration/distance/work, and prevented adipose tissue loss; these delays were absent in BubR1H/H mice without the transgene.
  • Late-life treatment starting at 5 months and assessed at 10 months improved muscle fibre size and exercise performance and increased fat depots and adipocyte size, but cataracts that had already matured remained unchanged; the effects reflected slowed progression rather than reversal of ageing.
  • p16Ink4a-independent phenotypes such as cardiac arrhythmias and arterial wall stiffening were not attenuated, and overall survival was not substantially extended, likely because cardiac failure is the main cause of death in this model. No overt side effects were observed in WT;INK-ATTAC mice treated until 8 months.

Methods

  • The INK-ATTAC construct used a 2,617-bp murine p16Ink4a promoter fragment to drive FKBP–Casp8, with an IRES-EGFP reporter; nine transgenic founder lines were generated and bred onto the BubR1 hypomorphic background, with lines 3 and 5 selected for study.
  • AP20187 was injected intraperitoneally every 3 days at 0.2 μg/g body weight from weaning (life-long) or from 5 months (late-life); phenotypes were assessed by lordokyphosis and cataract checks, muscle and fat histology, DEXA, treadmill exercise, BrdU incorporation, SA-β-Gal staining, qRT–PCR, and FACS.
  • In vitro, bone marrow cells were treated with 1 μM rosiglitazone for 5 days and then 10 nM AP20187 for 48 h; MEFs were induced to senesce by serial passaging (12–15 passages) or H-ras expression, sorted into GFP+ and GFP− populations, and analysed. Statistical comparisons used two-tailed unpaired t tests and log-rank tests.

Limitations

  • The paper states that no universal marker expressed solely in senescent cells has been identified, and the approach relies on p16Ink4a promoter activity and two transgenic lines.
  • The paper notes that overall survival was not substantially extended, probably because cardiac failure dominates mortality in BubR1H/H mice; p16Ink4a-independent pathologies were unaffected, and mature cataracts did not improve with late-life clearance.
  • Evident from the text: the findings are in a progeroid BubR1 hypomorphic mouse model rather than natural ageing, some measurements were performed in female mice, and absence of overt side effects was only tested in WT;INK-ATTAC mice up to 8 months.

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Integrity signals

Registry

Crossref · 10.1038/nature10600

Cites

31 of 31 references verified0 citation errors · 0 not checkable

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Claims the paper makes

9 of 19 cited sources checked · 5 supported · 0 flagged · accuracy not yet measured

Show all 40 claims

  • Probably not a substantial claim. 4
  • It may state two separate claims as one. 8
12 of 12
  • The authors state this as an assumption.

    Cardiac failure is the main cause of death in BubR1H/H mice.

    “Cardiac failure is presumably the main cause of death in BubR1H/H mice (data not shown)”
  • The paper relies on this without support.

    Before this study, it was unknown whether senescent cells are causally implicated in age-related dysfunction and whether removing them is beneficial.

    “However, whether senescent cells are causally implicated in age-related dysfunction and whether their removal is beneficial has remained unknown.”
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Metadata

Authors
Baker, D. J., Wijshake, T., Tchkonia, T., LeBrasseur, N. K., Childs, B. G., van de Sluis, B., Kirkland, J. L., & van Deursen, J. M.
Affiliations
Mayo Clinic (US)
Venue
Nature
Published
2011-11
Volume
479
Issue
7372
Pages
232-236
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2069519394
Cited by
3,670
References
32
Citations by year
2026: 221 · 2025: 284 · 2024: 347 · 2023: 316 · 2022: 333 · 2021: 333 · 2020: 324 · 2019: 299 · 2018: 250 · 2017: 190 · 2016: 203 · 2015: 157 · 2014: 159 · 2013: 127 · 2012: 119
FWCI
89.50
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Radboud Repository (Radboud University) (submittedVersion)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (submittedVersion)
Funders
  • National Institute on Aging (P01AG041122, AG 13925, R01AG013925, R37AG013925)
  • National Cancer Institute (CA-96985, R01CA096985)
  • National Institute of Diabetes and Digestive and Kidney Diseases (P30DK050456)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › 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
cellular senescence, senolytics, senolytic therapy, p16INK4a, senescent cell clearance, aging, age-related diseases, healthspan extension, adipose tissue, skeletal muscle, eye, tissue dysfunction
MeSH terms
Adipose Tissue, Aging, Animals, Bone Marrow Cells, Cell Count, Cells, Cultured, Eye, Female, Genotype, Longevity, Male, Mice, Transgenic, Phenotype, Progeria, Time Factors, Weaning, Gene Expression, Tacrolimus, Cellular Senescence, Protein Serine-Threonine Kinases, Muscle, Skeletal, Cell Cycle Proteins, Cyclin-Dependent Kinase Inhibitor p16, Mice

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