The DOI matches its Crossref record; 21 of the 21 references it cites were found in a registry or an index.
Regulation of a Senescence Checkpoint Response by the E2F1 Transcription Factor and p14 ARF Tumor Suppressor
Open accessAbstract
Normal cells do not divide indefinitely due to a process known as replicative senescence. Human cells arrest growth with a senescent phenotype when they acquire one or more critically short telomeres as a consequence of cell division. Recent evidence suggests that certain types of DNA damage, chromatin remodeling, and oncogenic forms of Ras or Raf can also elicit a senescence response. We show here that E2F1, a multifunctional transcription factor that binds the retinoblastoma (pRb) tumor suppressor and that can either promote or suppress tumorigenesis, induces a senescent phenotype when overexpressed in normal human fibroblasts. Normal human cells stably arrested proliferation and expressed several markers of replicative senescence in response to E2F1. This activity of E2F1 was independent of its pRb binding activity but dependent on its ability to stimulate gene expression. The E2F1 target gene critical for the senescence response appeared to be the p14(ARF) tumor suppressor. Replicatively senescent human fibroblasts overexpressed p14(ARF), and ectopic expression of p14(ARF) in presenescent cells induced a phenotype similar to that induced by E2F1. Consistent with a critical role for p14(ARF), cells with compromised p53 function were immune to senescence induction by E2F1, as were cells deficient in p14(ARF). Our findings support the idea that the senescence response is a critical tumor-suppressive mechanism, provide an explanation for the apparently paradoxical roles of E2F1 in oncogenesis, and identify p14(ARF) as a potentially important mediator of the senescent phenotype.
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Self-citation
Metadata
- Authors
- Dimri, G. P., Itahana, K., Acosta, M., & Campisi, J.
- Venue
- Molecular and Cellular Biology
- Publisher
- Informa UK Limited
- Published
- 2000-01
- Volume
- 20
- Issue
- 1
- Pages
- 273-285
- ISSN
- 0270-7306 (ISSN-L)
- 1098-5549
- OpenAlex
- W2150932906
- Cited by
- 395
- References
- 21
- FWCI
- 20.98
- Type
- journal article
- Language
- en
- Open access
- green
- Licence
- journals.asm.org/non-commercial-tdm-license (tdm)
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