Cited by 2,029Liver physiology and pathologyTelomeres, Telomerase, and SenescenceLiver Disease Diagnosis and Treatment

Senescence of activated stellate cells limits liver fibrosis

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Krizhanovsky, Valery, Yon, Monica, Dickins, Ross A., Hearn, Stephen, Simon, Janelle, Miething, Cornelius, Yee, Herman, Zender, Lars +1 more·2008·Cell

Abstract

Summary Cellular senescence acts as a potent mechanism of tumor suppression; however, its functional contribution to non-cancer pathologies has not been examined. Here we show that senescent cells accumulate in murine livers treated to produce fibrosis, a precursor pathology to cirrhosis. The senescent cells are derived primarily from activated hepatic stellate cells, which initially proliferate in response to liver damage and produce the extracellular matrix deposited in the fibrotic scar. In mice lacking key senescence regulators, stellate cells continue to proliferate, leading to excessive liver fibrosis. Furthermore, senescent activated stellate cells exhibit gene expression profile consistent with cell cycle exit, reduced secretion of extracellular matrix components, enhanced secretion of extracellular matrix degrading enzymes, and enhanced immune surveillance. Accordingly natural killer cells preferentially kill senescent activated stellate cells in vitro and in vivo, thereby facilitating the resolution of fibrosis. Therefore, the senescence program limits the fibrogenic response to acute tissue damage.

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Crossref · 10.1016/j.cell.2008.06.049

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  • There are theoretical side effects of eliminating senescent cells, including impaired wound healing or fibrosis during liver regeneration.

    “There are a number of theoretical side effects of eliminating senescent cells, including impaired wound healing or fibrosis during liver regeneration (Krizhanovsky et al., 2008; Demaria et al., 2014).”

    From The Achilles' heel of senescent cells: from transcriptome to senolytic drugs (2015) · cites this paper as Krizhanovsky et al., 2008

    The Discussion (page unavailable) says senescence of activated stellate cells limits fibrosis, but distinguishes that protective process from clearing cells after they become senescent. Rather than identifying fibrosis as a risk of eliminating senescent cells, it says their immune clearance helps resolve fibrosis and proposes enhancing clearance as a potential treatment. The paper does not assess impaired wound healing during liver regeneration. (LLM, conf=0.82)

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  • Among the cells that participate in clearance of senescent cells are natural killer cells, macrophages, and T cells.

    “Among the cells that participate in the clearance of senescent cells are natural killer cells, macrophages, and T cells (131, 135, 139).”

    From Aging, Cellular Senescence, and Cancer (2013) · cites this paper as [139]

    The Discussion says natural killer (NK) cells clear senescent activated stellate cells, and the Results show that altering NK-cell activity affects their clearance. The Results also place macrophages near cells with senescence markers and mention T cells as potential participants in NK-influenced killing, but do not establish that macrophages or T cells participate in clearing the senescent cells studied here. The indexed passages provide section labels but no page numbers. (LLM, conf=0.87)

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  • In a mouse model of acute liver injury, the injury induced senescence of hepatic stellate cells, which were eventually cleared by the immune system, principally by natural killer cells.

    “In a mouse model of acute liver injury, the injury induced the senescence of hepatic stellate cells, which were eventually cleared by the immune system (principally by natural killer cells) (139).”

    From Aging, Cellular Senescence, and Cancer (2013) · cites this paper as [139]

    The Results section reports that senescent activated hepatic stellate cells were cleared from mouse livers, principally through natural killer cell activity. But the Introduction and Experimental Procedures describe repeated CCl4 treatment to induce fibrosis—a model of chronic liver damage, not a model of acute liver injury. Page numbers are unavailable in our copy. (LLM, conf=0.90)

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  • When acute liver injury was performed on mice deficient in the p53/p21 and p16INK4a/pRB pathways-mice deficient in undergoing a senescence response-healing was accompanied by a marked increase in fibrosis.

    “When the injury was performed on mice that were deficient in the p53/p21 and p16INK4a/pRB pathways—that is, mice deficient in undergoing a senescence response—healing was accompanied by a marked increase in fibrosis (139).”

    From Aging, Cellular Senescence, and Cancer (2013) · cites this paper as [139]

    The Results section (“Fibrosis progression is restricted by an intact senescence machinery”; page unavailable) reports that mice lacking both p53 and INK4a/ARF had impaired senescence and more than 50% greater fibrotic area than wild-type mice. But the experiment used repeated CCl4 treatment, which the paper describes as chronic liver damage, not acute injury. The Results section on fibrosis reversion also reports more lesions remaining in the double mutants after treatment stopped, rather than an increase arising during healing from an acute injury. (LLM, conf=0.90)

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  • SASP from these cells attracts NK cells that remove senescent cells from the liver and restore liver homeostasis.

    “SASP from these cells attracts natural killer (NK) cells that eliminate senescent cells from the liver to restore liver homeostasis145.”

    From Cellular senescence in ageing: from mechanisms to therapeutic opportunities (2021) · cites this paper as [145]

    The Results report that senescent stellate cells upregulate secretory and immune-surveillance genes, and that NK-cell activity promotes their clearance and fibrosis resolution in mice. But the Results describe signals from senescent cells attracting immune cells as a possibility, not an established SASP-driven recruitment mechanism; the Discussion likewise proposes, rather than demonstrates, a return to the liver’s pre-damaged state. Page numbers are unavailable in our copy. (LLM, conf=0.87)

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Authors
Krizhanovsky, V., Yon, M., Dickins, R. A., Hearn, S., Simon, J., Miething, C., Yee, H., Zender, L., & Lowe, S. W.
Affiliations
  • Cold Spring Harbor Laboratory (US)
  • Universidade de São Paulo (BR)
  • Howard Hughes Medical Institute (US)
  • NYU Langone Health (US)
Corresponding author
Lowe, Scott W.
Venue
Cell
Publisher
Elsevier BV
Published
2008-08
Volume
134
Issue
4
Pages
657-667
ISSN
0092-8674 (ISSN-L)
OpenAlex
W1570233039
Cited by
2,029
References
34
Citations by year
2026: 114 · 2025: 135 · 2024: 153 · 2023: 135 · 2022: 156 · 2021: 170 · 2020: 154 · 2019: 146 · 2018: 137 · 2017: 126 · 2016: 125 · 2015: 90 · 2014: 88 · 2013: 83 · 2012: 64
FWCI
35.83
Type
journal article
Language
en
Update notices
erratum (2008-10-03)
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • Cold Spring Harbor Laboratory Institutional Repository (Cold Spring Harbor Laboratory) (acceptedVersion)
Funders
  • Howard Hughes Medical Institute
  • National Institute on Aging (R56AG016379, AG-16379, R01AG016379)
  • National Cancer Institute (P01CA013106, P30CA008748)
Topics
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Health Sciences › Medicine › Epidemiology › Liver Disease Diagnosis and Treatment
Keywords
cellular senescence, activated hepatic stellate cells, liver fibrosis, liver cirrhosis, extracellular matrix deposition, natural killer cells, immune surveillance, cell cycle exit
MeSH terms
Animals, Carbon Tetrachloride, Cells, Cultured, Female, Fibroblasts, Humans, Killer Cells, Natural, Liver, Liver Cirrhosis, Liver Cirrhosis, Experimental, Cellular Senescence, Mice

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