Cited by 39Genetic and Kidney Cyst DiseasesTelomeres, Telomerase, and SenescenceHedgehog Signaling Pathway Studies

Ciliary abnormalities in senescent human fibroblasts impair proliferative capacity

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Breslin, Loretta, Prosser, Suzanna L, Cuffe, Sandra, Morrison, Ciaran G·2014·Cell Cycle

Abstract

Somatic cells senesce in culture after a finite number of divisions indefinitely arresting their proliferation. DNA damage and senescence increase the cellular number of centrosomes, the 2 microtubule organizing centers that ensure bipolar mitotic spindles. Centrosomes also provide the basal body from which primary cilia extend to sense and transduce various extracellular signals, notably Hedgehog. Primary cilium formation is facilitated by cellular quiescence a temporary cell cycle exit, but the impact of senescence on cilia is unknown. We found that senescent human fibroblasts have increased frequency and length of primary cilia. Levels of the negative ciliary regulator CP110 were reduced in senescent cells, as were levels of key elements of the Hedgehog pathway. Hedgehog inhibition reduced proliferation in young cells with increased cilium length accompanying cell cycle arrest suggesting a regulatory function for Hedgehog in primary ciliation. Depletion of CP110 in young cell populations increased ciliation frequencies and reduced cell proliferation. These data suggest that primary cilia are potentially novel determinants of the reduced cellular proliferation that initiates senescence.

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  • The core signature includes BCL2L2, PATZ1, and SMO, genes previously linked to senescence.

    “Nevertheless, within the senescence core signature, we found genes that had been previously linked to senescence: BCL2L2 (also known as Bcl-w), a negative regulator of apoptosis [26]; PATZ1, a transcriptional repressor whose expression inhibits senescence in endothelial cells [27]; SMO, a component of the Hedgehog pathway [28]; and CCND1, a regulatory subunit of CDK4 or CDK6, whose activity is req”

    From Unmasking Transcriptional Heterogeneity in Senescent Cells (2017) · cites this paper as [28]

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Research works printed but not linked: 1

  1. [10]10. Hara E, Smith R, Parry D, Tahara H, Stone S, Peters G. Regulation of p16CDKN2 expression and its implications for cell immortalization and senescence. Mol Cell Biol 1996; 16:859-67; PMID: 8622687

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Authors
Breslin, L., Prosser, S. L., Cuffe, S., & Morrison, C. G.
Affiliations
Ollscoil na Gaillimhe – University of Galway (IE)
Corresponding author
Morrison, Ciaran G
Venue
Cell Cycle
Published
2014-09-02
Volume
13
Issue
17
Pages
2773-2779
ISSN
  • 1538-4101 (ISSN-L)
  • 1551-4005
OpenAlex
W2051054464
Cited by
39
References
42
Citations by year
2026: 2 · 2025: 8 · 2024: 3 · 2023: 6 · 2022: 1 · 2021: 6 · 2020: 2 · 2019: 2 · 2018: 2 · 2017: 4 · 2016: 1 · 2015: 1 · 2014: 1
FWCI
1.53
Type
journal article
Language
en
Open access
Locations
  • Cell Cycle (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Arrow@dit (Dublin Institute of Technology) (submittedVersion)
  • ARAN (University of Galway Research Repository) (Ollscoil na Gaillimhe – University of Galway) (submittedVersion, cc-by-nc-nd)
  • Figshare (submittedVersion, cc-by)
  • Figshare (cc-by)
Funders
  • Irish Cancer Society
  • Science Foundation Ireland (10/IN.1/B2972)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and Kidney Cyst Diseases
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Hedgehog Signaling Pathway Studies
Keywords
cellular senescence, primary cilia, ciliary abnormalities, fibroblasts, cell proliferation, Hedgehog signaling, CP110, centrosome, ciliation, cell cycle arrest, DNA damage
MeSH terms
Cells, Cultured, Cilia, Fibroblasts, Humans, Microtubule-Associated Proteins, Phosphoproteins, Cellular Senescence, Cell Cycle Proteins, Cell Proliferation, Hedgehog Proteins

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