Identification of a candidate tumor-suppressor gene specifically activated during Ras-induced senescence.
Gonos, Efstathios S
Delgado, M Dolores
AffiliationDepartment of Immunology and Oncology, Spanish National Center of Biotechnology (CSIC), Campus de Cantoblanco, Madrid E-28049, Spain.
MetadataShow full item record
AbstractNormal cells display protective responses against oncogenes. Notably, oncogenic Ras triggers an irreversible proliferation arrest that is reminiscent of replicative senescence and that is considered a relevant tumor-suppressor mechanism. Here, we have used microarrayed filters to identify genes specifically upregulated in Ras-senescent human fibroblasts. Among the initial set of genes selected from the microarrays, we found the cell-cycle inhibitor p21(Cip1/Waf1), thus validating the potency of the screening to identify markers and mediators of Ras-senescence. A group of six genes, formed by those more highly upregulated during Ras-senescence, was analyzed in further detail to evaluate their specificity. In particular, we examined their expression in cells overexpressing Ras but rendered resistant to Ras-senescence by the viral oncoprotein E1a; also, we have studied their expression during replicative senescence, organismal aging, H(2)O(2)-induced senescence, and DNA damage. In this manner, we have identified a novel gene, RIS1 (for Ras-induced senescence 1), which is not upregulated in association to any of the above-mentioned processes, but exclusively during Ras-senescence. Furthermore, RIS1 is also upregulated by the transcriptional factor Ets2, which is a known mediator of Ras-induced senescence. Interestingly, RIS1 is located at chromosomal position 3p21.3 and, more specifically, it is included in a short segment of just 1 Mb previously defined by other investigators for its tumor-suppressor activity. In summary, we report the identification of a novel gene, RIS1, as a highly specific marker of Ras-induced senescence and a candidate tumor-suppressor gene.
CitationIdentification of a candidate tumor-suppressor gene specifically activated during Ras-induced senescence. 2002, 273 (2):127-37 Exp. Cell Res.
JournalExperimental Cell Research
- A functional screen identifies hDRIL1 as an oncogene that rescues RAS-induced senescence.
- Authors: Peeper DS, Shvarts A, Brummelkamp T, Douma S, Koh EY, Daley GQ, Bernards R
- Issue date: 2002 Feb
- Normal cellular senescence and cancer susceptibility in mice genetically deficient in Ras-induced senescence-1 (Ris1).
- Authors: Nieto M, Barradas M, Criado LM, Flores JM, Serrano M, Llano E
- Issue date: 2007 Mar 15
- Functional identification of LRF as an oncogene that bypasses RASV12-induced senescence via upregulation of CYCLIN E.
- Authors: Vredeveld LC, Rowland BD, Douma S, Bernards R, Peeper DS
- Issue date: 2010 Feb
- Molecular signature of oncogenic ras-induced senescence.
- Authors: Mason DX, Jackson TJ, Lin AW
- Issue date: 2004 Dec 9
- Activation of ARF by oncogenic stress in mouse fibroblasts is independent of E2F1 and E2F2.
- Authors: Palmero I, Murga M, Zubiaga A, Serrano M
- Issue date: 2002 May 2