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10.1111/acel.13331

http://scihub22266oqcxt.onion/10.1111/acel.13331
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33660365!8045932!33660365
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suck abstract from ncbi


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pmid33660365      Aging+Cell 2021 ; 20 (4): e13331
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  • A novel p53 regulator, C16ORF72/TAPR1, buffers against telomerase inhibition #MMPMID33660365
  • Benslimane Y; Sanchez-Osuna M; Coulombe-Huntington J; Bertomeu T; Henry D; Huard C; Bonneil E; Thibault P; Tyers M; Harrington L
  • Aging Cell 2021[Apr]; 20 (4): e13331 PMID33660365show ga
  • Telomere erosion in cells with insufficient levels of the telomerase reverse transcriptase (TERT), contributes to age-associated tissue dysfunction and senescence, and p53 plays a crucial role in this response. We undertook a genome-wide CRISPR screen to identify gene deletions that sensitized p53-positive human cells to telomerase inhibition. We uncovered a previously unannotated gene, C16ORF72, which we term Telomere Attrition and p53 Response 1 (TAPR1), that exhibited a synthetic-sick relationship with TERT loss. A subsequent genome-wide CRISPR screen in TAPR1-disrupted cells reciprocally identified TERT as a sensitizing gene deletion. Cells lacking TAPR1 or TERT possessed elevated p53 levels and transcriptional signatures consistent with p53 upregulation. The elevated p53 response in TERT- or TAPR1-deficient cells was exacerbated by treatment with the MDM2 inhibitor and p53 stabilizer nutlin-3a and coincided with a further reduction in cell fitness. Importantly, the sensitivity to treatment with nutlin-3a in TERT- or TAPR1-deficient cells was rescued by loss of p53. These data suggest that TAPR1 buffers against the deleterious consequences of telomere erosion or DNA damage by constraining p53. These findings identify C16ORF72/TAPR1 as new regulator at the nexus of telomere integrity and p53 regulation.
  • |*Aminobenzoates/pharmacology[MESH]
  • |*Intercellular Signaling Peptides and Proteins/genetics/metabolism[MESH]
  • |*Naphthalenes/pharmacology[MESH]
  • |*Precursor Cell Lymphoblastic Leukemia-Lymphoma/metabolism/pathology[MESH]
  • |*Signal Transduction/drug effects/genetics[MESH]
  • |*Telomerase/antagonists & inhibitors/genetics/metabolism[MESH]
  • |*Tumor Suppressor Protein p53/metabolism[MESH]
  • |Cell Line, Tumor[MESH]
  • |DNA Damage/drug effects[MESH]
  • |Gene Knockout Techniques[MESH]
  • |Humans[MESH]
  • |Imidazoles/pharmacology[MESH]
  • |Piperazines/pharmacology[MESH]
  • |Proto-Oncogene Proteins c-mdm2/antagonists & inhibitors[MESH]
  • |Telomere/metabolism[MESH]
  • |Transduction, Genetic[MESH]


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