Homo sapiens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA87661 | ENA |
REPOSITORIES: ENA
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Project description:Low dose ionizing radiation treated lymphoblastoid cells
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Project description:We have used chromatin immune-precipitation with parallel sequencing (ChIP-Seq) technology to identify genome-wide p53 binding in human lymphoblastoid cell lines treated withionizing radiation ChIP-Seq analysis of p53 binding sites in human lymphoblastoid cells treated with ionizing radiation or vehicle
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Project description:Transcriptional profiling of human mesenchymal stem cells comparing normoxic MSCs cells with hypoxic MSCs cells. Hypoxia may inhibit senescence of MSCs during expansion. Goal was to determine the effects of hypoxia on global MSCs gene expression.
2011-02-19 | GSE20463 | GEO
Project description:Coordinated regulation of MAPK signaling pathway and microRNA in response to ionizing radiation in lung cancer cells
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Project description:Skin is usually exposed during human exposures to ionizing radiation, however there are few experiments that evaluate the radiation responsiveness of the cells of the epidermis (keratinocytes) and those of the dermis (fibroblasts) in the same studies. We evaluated the transcriptional responses of quiesent primary keratinocytes and fibroblasts from the same individual and compared them with quiescent keratinocytes and fibroblasts that were immortalized by human telomerase (hTert). The primary transcriptional responses to 10-500 cGy ionizing radiation were p53-mediated responses; however, we did identify distinct responses between the keratinocytes and the fibroblasts. Keywords: keratinocytes and fibroblasts - dose response to ionizing radiation
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Project description:Response of human lymphoblastoid cells to activated medium
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Project description:The tumor suppressor p53 is a transcription factor that coordinates the cellular response to DNA damage. Here we provide an integrated analysis of p53 genomic occupancy and p53-dependent gene regulation in the splenic B and non-B cell compartments of mice exposed to whole-body ionizing radiation, providing insight into general principles of p53 activity in vivo. In unstressed conditions, p53 bound few genomic targets; induction of p53 by ionizing radiation increased the number of p53 bound sites, leading to highly overlapping profiles in the different cell types. Comparison of these profiles with chromatin features in unstressed B cells revealed that, upon activation, p53 localized at active promoters, distal enhancers, and a smaller set of unmarked distal regions. At promoters, recognition of the canonical p53 motif as well as binding strength were associated with p53-dependent transcriptional activation, but not repression, indicating that the latter was most likely indirect. p53-activated targets constituted the core of a cell type-independent response, superimposed onto a cell type-specific program. Core response genes included most of the known p53-regulated genes, as well as many new ones. Our data represent a unique characterization of the p53-regulated response to ionizing radiation in vivo. Mapping p53 binding sites in the splenic B and non-B cell compartments of mice exposed to whole-body ionizing radiation
2015-08-24 | E-GEOD-71175 | biostudies-arrayexpress
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