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- W2046996819 abstract "The CDKN2A locus encodes two important tumor suppressors, INK4a and ARF, which respond to oncogenic stresses by inducing cellular senescence. We conducted a genome-scale cDNA overexpression screen using a reporter containing INK4a regulatory sequences to identify novel transcriptional activators of this locus. This screen revealed 285 cDNAs that putatively regulate the transcriptional activation of INK4a. Of these, 56 are annotated as transcription factors, including two previously reported activators of the locus, ETS2 and JUNB. Fourteen genes were further validated for activity and specificity, including several homeodomain proteins. We found that the transcription of one of these, the homeodomain protein MEOX2 (GAX) is enhanced in primary cells during the induction of senescence, and forced expression of this protein results in the induction of premature senescence. We further demonstrate that MEOX2-induced senescence is dependent upon INK4a activity, and chromatin immunoprecipitation studies indicate that MEOX2 directly binds the INK4a promoter. These results support a role for this homeodomain protein as a direct regulator of INK4a transcription and senescence in human cells." @default.
- W2046996819 created "2016-06-24" @default.
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- W2046996819 date "2009-04-02" @default.
- W2046996819 modified "2023-10-18" @default.
- W2046996819 title "A Functional Screen for Regulators of CKDN2A Reveals MEOX2 as a Transcriptional Activator of INK4a" @default.
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- W2046996819 doi "https://doi.org/10.1371/journal.pone.0005067" @default.
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