Cited by 438Telomeres, Telomerase, and SenescenceGenetics, Aging, and Longevity in Model OrganismsCancer-related Molecular Pathways

Telomerase modulates expression of growth-controlling genes and enhances cell proliferation

Smith, Laura L., Coller, Hilary A., Roberts, James M.·2003·Nature Cell Biology

Abstract

Most somatic cells do not express sufficient amounts of telomerase to maintain a constant telomere length during cycles of chromosome replication. Consequently, there is a limit to the number of doublings somatic cells can undergo before telomere shortening triggers an irreversible state of cellular senescence. Ectopic expression of telomerase overcomes this limitation, and in conjunction with specific oncogenes can transform cells to a tumorigenic phenotype. However, recent studies have questioned whether the stabilization of chromosome ends entirely explains the ability of telomerase to promote tumorigenesis and have resulted in the hypothesis that telomerase has a second function that also supports cell division. Here we show that ectopic expression of telomerase in human mammary epithelial cells (HMECs) results in a diminished requirement for exogenous mitogens and that this correlates with telomerase-dependent induction of genes that promote cell growth. Furthermore, we show that inhibiting expression of one of these genes, the epidermal growth factor receptor (EGFR), reverses the enhanced proliferation caused by telomerase. We conclude that telomerase may affect proliferation of epithelial cells not only by stabilizing telomeres, but also by affecting the expression of growth-promoting genes.

Integrity signals

Registry

Crossref · 10.1038/ncb985

Cites

31 of 31 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Apart from initiating replicative immortality, telomerase seems to play a crucial role in almost all the hallmarks of cancer, including cell growth and proliferation through activation of EGFR signaling, resistance to apoptosis through activation of NF-kB, promotion of invasion and metastasis through induction of epithelial-mesenchymal transition via the Wnt/b-catenin pathway that upregulates Snai

    “It has to be noted though that apart from initiating replicative immortality, telomerase seems to play a crucial role in almost all the hallmarks of cancer, ranging from cell growth and proliferation through to the activation of EGFR signaling [182], resistance to apoptosis through activation of NF-kB [183], and the promotion of invasion and metastasis through induction of the epithelial–mesenchym”
  • Overexpression experiments in transgenic mice and human cells have shown TERT has activities in cellular transformation, proliferation, stem cell biology, cell survival and chromatin regulation.

    “Overexpression experiments in transgenic mice and in human cells have shown that TERT exhibits activities in cellular transformation (136-138), proliferation (139), stem cell biology (140-142), cell survival (143,144) and chromatin regulation (145).”

    From Telomeres and telomerase in cancer (2010) · cites this paper as [137]

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Smith, L. L., Coller, H. A., & Roberts, J. M.
Affiliations
Howard Hughes Medical Institute (US)
Corresponding author
Roberts, James M.
Venue
Nature Cell Biology
Published
2003-04-22
Volume
5
Issue
5
Pages
474-479
ISSN
  • 1465-7392 (ISSN-L)
  • 1476-4679
OpenAlex
W2017752436
Cited by
438
References
31
Citations by year
2026: 2 · 2025: 4 · 2024: 5 · 2023: 11 · 2022: 9 · 2021: 11 · 2020: 8 · 2019: 12 · 2018: 17 · 2017: 19 · 2016: 29 · 2015: 20 · 2014: 14 · 2013: 22 · 2012: 30
FWCI
19.93
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Cell Biology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (1f32ca083311-01)
  • National Cancer Institute (1 F32 CA83311-01)
Topics
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
Keywords
telomerase, cell proliferation, telomere shortening, cellular senescence, epidermal growth factor receptor, human mammary epithelial cells, carcinogenesis, telomere stabilization, oncogenic transformation
MeSH terms
Breast, Cell Division, Cell Transformation, Neoplastic, Cells, Cultured, DNA Replication, Epithelial Cells, Growth Substances, Humans, Mitogens, Molecular Sequence Data, Neoplasms, Repressor Proteins, RNA, Up-Regulation, Gene Expression Regulation, Neoplastic, Cellular Senescence, Telomerase, ErbB Receptors

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review