Cited by 547Nuclear Structure and FunctionTelomeres, Telomerase, and SenescenceGenetics, Aging, and Longevity in Model Organisms

The role of nuclear lamin B1 in cell proliferation and senescence

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Shimi, Takeshi, Butin-Israeli, Veronika, Adam, Stephen A., Hamanaka, Robert B., Goldman, Anne E., Lucas, Catherine A., Shumaker, Dale K., Kosak, Steven T. +2 more·2011·Genes & Development

Abstract

Nuclear lamin B1 (LB1) is a major structural component of the nucleus that appears to be involved in the regulation of many nuclear functions. The results of this study demonstrate that LB1 expression in WI-38 cells decreases during cellular senescence. Premature senescence induced by oncogenic Ras also decreases LB1 expression through a retinoblastoma protein (pRb)-dependent mechanism. Silencing the expression of LB1 slows cell proliferation and induces premature senescence in WI-38 cells. The effects of LB1 silencing on proliferation require the activation of p53, but not pRb. However, the induction of premature senescence requires both p53 and pRb. The proliferation defects induced by silencing LB1 are accompanied by a p53-dependent reduction in mitochondrial reactive oxygen species (ROS), which can be rescued by growth under hypoxic conditions. In contrast to the effects of LB1 silencing, overexpression of LB1 increases the proliferation rate and delays the onset of senescence of WI-38 cells. This overexpression eventually leads to cell cycle arrest at the G1/S boundary. These results demonstrate the importance of LB1 in regulating the proliferation and senescence of human diploid cells through a ROS signaling pathway.

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Crossref · 10.1101/gad.179515.111

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  • Cellular senescence is accompanied by substantial reorganization of the nuclear envelope and a breakdown in nucleocytoplasmic trafficking, including altered expression and degradation of Lamin B1, and formation of cytoplasmic chromatin fragments.

    “Cellular senescence is accompanied by substantial reorganization of the nuclear envelope and a breakdown in nucleocytoplasmic trafficking, including altered expression and degradation of Lamin B1, and the formation of cytoplasmic chromatin fragments (CCFs) [38–45].”

    From Chemically induced reprogramming to reverse cellular aging (2023) · cites this paper as [45]

    Split into 2 atoms — 0 confirmed, 2 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

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  • Depletion of LMNB1 is sufficient to induce senescence through modulation of reactive oxygen species (ROS) production.

    “Shimi et al. (2011) showed that depletion of LMNB1 is sufficient to induce senescence through modulation of reactive oxygen species (ROS) production.”

    From Cellular senescence and its effector programs (2014) · cites this paper as Shimi et al. 2011

    The section ‘LB1 silencing inhibits proliferation and induces premature senescence’ reports that silencing LB1 induced senescence in the human fibroblasts studied. The ROS-signaling section reports an early decrease in ROS and says the results ‘suggest’ that a ROS pathway is responsible for induction of the senescence program. The claim presents that proposed mechanism as established and omits the study’s cell-type scope. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Lamin B1 (LMNB1) is specifically down-regulated during senescence in human diploid fibroblasts (HDFs).

    “Recently, Lamin B1 (LMNB1) was reported to be specifically down-regulated during senescence in HDFs (Shimi et al. 2011).”

    From Cellular senescence and its effector programs (2014) · cites this paper as Shimi et al. 2011

  • Depletion of LMNB1 leads to a reduction of ROS in a p53-dependent manner.

    “Perhaps paradoxically, they showed that depletion of LMNB1 leads to a reduction of ROS in a p53-depenent manner.”

    From Cellular senescence and its effector programs (2014) · cites this paper as Shimi et al. 2011

  • RNAi-mediated depletion of LMNB1 is associated with reduced cell proliferation to various degrees in most studies.

    “However, RNAi-mediated depletion of LMNB1 appears to be associated with reduced cell proliferation to various degrees in most (Shimi et al. 2011; Dreesen et al. 2013; Sadaie et al. 2013; Shah et al. 2013).”

    From Cellular senescence and its effector programs (2014) · cites this paper as Shimi et al. 2011

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Authors
Shimi, T., Butin-Israeli, V., Adam, S. A., Hamanaka, R. B., Goldman, A. E., Lucas, C. A., Shumaker, D. K., Kosak, S. T., Chandel, N. S., & Goldman, R. D.
Affiliations
Northwestern University (US)
Venue
Genes & Development
Published
2011-12-08
Volume
25
Issue
24
Pages
2579-2593
ISSN
  • 0890-9369 (ISSN-L)
  • 1549-5477
OpenAlex
W2097265055
Cited by
547
References
98
Citations by year
2026: 23 · 2025: 31 · 2024: 60 · 2023: 53 · 2022: 45 · 2021: 59 · 2020: 39 · 2019: 30 · 2018: 35 · 2017: 22 · 2016: 36 · 2015: 37 · 2014: 35 · 2013: 27 · 2012: 14
Type
posted content
Language
en
Open access
Locations
  • Genes & Development (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Burroughs Wellcome Fund
  • Ellison Medical Foundation
  • Progeria Research Foundation
  • Directorate for Biological Sciences
  • National Cancer Institute (R01CA123067, R01CA031760)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nuclear Structure and Function
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
cellular senescence, premature senescence, cell proliferation, WI-38 cells, retinoblastoma protein, p53, mitochondrial reactive oxygen species, hypoxia, G1/S cell cycle arrest, oncogenic Ras
MeSH terms
Cell Cycle, Cell Line, Cell Nucleus, Cytoskeletal Proteins, Fibroblasts, Gene Expression Regulation, Humans, Signal Transduction, Tumor Suppressor Protein p53, Retinoblastoma Protein, Telomere, Cellular Senescence, Reactive Oxygen Species, ras Proteins, Gene Silencing, Gene Expression Profiling, Cell Proliferation

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