Homo sapiens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA98149 | ENA |
REPOSITORIES: ENA
Similar Datasets
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
2009-05-31 | GSE14466 | GEO
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. Experiment Overall Design: Four cell types (primary keratinocytes, hTert immortalized keratinocytes, primary fibroblasts, hTert immortalized fibroblasts) grown to quiescence, treated with 0, 10, 100 or 500 cGy gamma irradiation, RNA collected at 4 hrs.
2009-06-08 | E-GEOD-14466 | biostudies-arrayexpress
Project description:ATM Requirement in Gene Expression Responses to Ionizing Radiation in Human Lymphoblasts and Fibroblasts
| PRJNA92717 | ENA
Project description:Radiation dermatitis is a side effect in cancer radiotherapy, where ionizing radiation is delivered to eradicate cancer. Normal tissue such as the skin is also damaged by this treatment. We report here the gene expression change in a rat footpad model of this disease.
2019-05-25 | GSE81907 | GEO
Project description:Transcription profiling of IMR90 fibroblasts after ionizing radiation. Cells were harvested 30 minutes (acute response) or 5 days (cell cycle arrested) after being irradiated with 5Gy of ionizing radiation.
2014-06-17 | E-MTAB-2088 | biostudies-arrayexpress
Project description:The changes in global gene expression in response to DNA damage may derive from either direct induction or repression by transcriptional regulation or indirectly by synchronization of cells to specific cell cycle phases, such as G1 or G2. We developed a model that successfully estimated the expression levels of >400 cell-cycle-regulated genes in normal human fibroblasts based on the proportions of cells in each phase of the cell cycle. By isolating effects on the gene expression associated with the cell cycle phase redistribution after genotoxin treatment, the direct transcriptional target genes were distinguished from genes for which expression changed secondary to cell synchronization. Application of this model to ionizing radiation (IR)-treated normal human fibroblasts identified 150 of 406 cycle-regulated genes as putative direct transcriptional targets of IR-induced DNA damage. Changes in expression of these genes after IR treatment derived from both direct transcriptional regulation and cell cycle synchronization. Keywords: Microarray, Cell cycle, Ionizing radiation, Human fibroblasts, EPIG
2007-08-01 | GSE7075 | GEO
Project description:The purpose of this experiment is to elucidate temporal activities and biological processes that can be inferred in response to a 200cGy challenging dose with or without a 10 cGy priming dose in embryonic human fibroblasts The experiment is designed around the human diploid embryonic lung fibroblast cell line WI38 (TP53 proficient), which was grown as a monolayer (2D) under physiological cell culture conditions (3% O2; 10% CO2). Cells are exposed to 2Gy (e.g., the challenge dose) of ionizing radiation (160 kV X-rays) with or without a priming dose of 10cGy (e.g., the adaptive dose) 4 hours prior to the challenge dose. Three biological replicates for each treatment group (e.g., with and without the priming dose) were collected 1, 2, 4 and 8 hours after the challenge dose. The time course was selected on the basis of our prior research on early response to ionizing radiation [1,2]. Purified total cellular RNA was extracted using an RNeasy Mini Kit (Qiagen) and quantified for Affymetrix microarray analysis using Human Gene 1.0 ST Array. Robust multi-array analysis (RMA) was performed to normalize data collected from the different samples. Samples were examined for quality control using the NUSE protocol. Reference [1] Groesser T. et al., Int J of Radiation Research, 2011. 87(7): p. 696-710. Reference [2] Han J. et al., Microscopy, 2010. 241(3): p. 315-326
2012-04-30 | E-GEOD-37668 | biostudies-arrayexpress
Project description:Ionizing radiation, released during accidents at nuclear power plants or after atomic bomb explosions, is a potentially serious health threat for the exposed human population. This type of high-energy radiation causes DNA damage including single- and double-strand breaks and induces chromosomal rearrangements and mutations, but it is not known if ionizing radiation directly induces changes in the epigenome of irradiated cells. We treated normal human fibroblasts and normal human bronchial epithelial cells with different doses of gamma-radiation emitted from a cesium 137 (137Cs) radiation source. After a recovery period, we analyzed global DNA methylation patterns in the irradiated and control cells using the methylated-CpG island recovery assay (MIRA) method in combination with high-resolution microarrays. Bioinformatics analysis revealed only a small number of potential methylation changes with low fold-difference ratios in the irradiated cells. These minor methylation differences seen on the microarrays could not be verified by COBRA (combined bisulfite restriction analysis) or bisulfite sequencing of selected target loci. Our study shows that acute gamma-radiation treatment of two types of human cells had no appreciable effect on DNA cytosine methylation patterns in exposed cells. DNA methylation patterns in gamma-irradiated cells and non- treated cells analyzed by microarrays
2012-11-29 | E-GEOD-39038 | biostudies-arrayexpress
Project description:Ionizing radiation, released during accidents at nuclear power plants or after atomic bomb explosions, is a potentially serious health threat for the exposed human population. This type of high-energy radiation causes DNA damage including single- and double-strand breaks and induces chromosomal rearrangements and mutations, but it is not known if ionizing radiation directly induces changes in the epigenome of irradiated cells. We treated normal human fibroblasts and normal human bronchial epithelial cells with different doses of gamma-radiation emitted from a cesium 137 (137Cs) radiation source. After a recovery period, we analyzed global DNA methylation patterns in the irradiated and control cells using the methylated-CpG island recovery assay (MIRA) method in combination with high-resolution microarrays. Bioinformatics analysis revealed only a small number of potential methylation changes with low fold-difference ratios in the irradiated cells. These minor methylation differences seen on the microarrays could not be verified by COBRA (combined bisulfite restriction analysis) or bisulfite sequencing of selected target loci. Our study shows that acute gamma-radiation treatment of two types of human cells had no appreciable effect on DNA cytosine methylation patterns in exposed cells.
2012-11-29 | GSE39038 | GEO
Project description:The involvement the thioredoxin system in radiation resistance was investigated in human lung cancer cells by a combination of ionizing radiation and specific thioredoxin reductase-inhibition by a phosphine gold compound. Gene expression profiles (Human Gene 1.0 ST) of lung cancer cells subjected to ionizing radiation and/or inhibition of thioredoxin reductase were studied. Data analyses were performed using the Affymetrix GeneChip Operating Software (GCOS) Version 1.4.
2010-12-03 | E-GEOD-25814 | biostudies-arrayexpress