Impact of aging on gene expression response to x-ray irradiation using mouse blood
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PROVIDER: PRJNA548357 | ENA |
REPOSITORIES: ENA
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Project description:Background: In the event of an improvised nuclear device or radiological dirty bomb detonation large numbers of people will be exposed to radiation that would require a timely and accurate biodosimetry to identify the highly exposed individuals who would require medical treatment from those who have received low or no radiation (the “worried well”). Gene expression signatures in response to radiation have been derived from mice and human peripheral blood and the impact of a number of variables, such as dose, time, genotype, and gender, on gene expression has been analyzed. However, the impact of aging on radiation gene profiling has not been taken into consideration. Results: Global gene expression was measured in the blood of young (2 mo) and old (21 mo) male C57BL/6J mice 1 day after they were exposed to 4 Gy x-rays or they were sham irradiated (control) using the Agilent Mouse Whole Genome microarrays. Animals exposed to radiation suppressed expression of DNA repair genes with fold-changes being very similar to the two age groups. A notable exception was Mismatch Repair (MMR) that was significantly enriched among the downregulated genes in irradiated old mice (p = 2.34E-09) compared with irradiated young mice (p = 1.62E-04). Furthermore, cardiac hypertrophy signaling (p < 0.002) and the role of NFAT in cardiac hypertrophy (p = 0.01) were predicted to be enriched among the upregulated differentially expressed genes in irradiated old mice, but not irradiated young mice. In contrast, young mice respond to x-ray exposure by significantly upregulating genes involved in phagosome formation (p = 3.09E-07), phagosome maturation (p = 0.001), and Fcγ receptor-mediated phagocytosis (p = 0.03), all crucial processes that eliminates apoptotic cells and preserve tissue homeostasis. Conclusions: We show that age is a variable that has the potential to fundamentally alter the transcriptomic profile of irradiated mouse blood. A number of biological processes, including phagocytosis, are differentially represented in young and old mice exposed to x-ray radiation. Our results highlight the significance of age as a variable that can have profound biological effects that will affect medical management and treatment decisions in case of a radiological emergency.
2021-05-19 | GSE132559 | GEO
Project description:Purpose: The goal of this study was to compare the lncRNA and mRNA expression profile of human fibroblast WS1 cells between 0 Gy and 5 Gy X-ray irradiation. Methods: lncRNA and mRNA-sequencing of WS1 cells were generated using Illuminal Hiseq4000, RNA-seq reads were mapped to human genome hg19 by hisat2 software. Cuffdiff software was used to analysis the differentially expressed levels of LncRNA and mRNA FPKM. Results: We identified different expressed levels of 88780 lnRNA and 20311 mRNA transcripts in WS1 cells between 0 Gy and 5 Gy X-ay irradiation. Conclusion: Our study first revealed the detail of lncRNA and mRNA expression profiles of WS1 cells after 5Gy of X-Ray irradiation
2018-07-20 | GSE102145 | GEO
Project description:We report the application of RIP-sequencing technology for high-throughput profiling of ELAVL1 protein on the effect of lncRNA an mRNA in WS1 cells after 5 Gy X-ray irradiation
2018-07-20 | GSE102146 | GEO
Project description:To identify age-related gene expression changes in infant (1-week-old) and adult (7-week-old) mouse liver tissues after Gamma-ray irradiation.
2017-06-26 | GSE84041 | GEO
Project description:As a radiation biodosimetry tool, gene expression profiling is being developed using mouse and human peripheral blood models. The impact of dose, dose-rate, and radiation quality has been studied with the goal of predicting radiological tissue injury. In this study, we determined the impact of aging on the gene expression profile of blood from mice exposed to radiation. Young (2 mo) and old (21 mo) male mice were irradiated with 4 Gy x-rays, total RNA was isolated from whole blood 24 h later, and subjected to whole genome microarray analysis. Pathway analysis of differentially expressed genes revealed young mice responded to x-ray exposure by significantly upregulating pathways involved in apoptosis and phagocytosis, a process that eliminates apoptotic cells and preserves tissue homeostasis. In contrast, the functional annotation of senescence was overrepresented among differentially expressed genes from irradiated old mice without enrichment of phagocytosis pathways. Pathways associated with hematologic malignancies were enriched in irradiated old mice compared with irradiated young mice. The fibroblast growth factor signaling pathway was underrepresented in older mice under basal conditions. Similarly, brain-related functions were underrepresented in unirradiated old mice. Thus, age-dependent gene expression differences should be considered when developing gene signatures for use in radiation biodosimetry.
| S-EPMC8119453 | biostudies-literature
Project description:Hela cells were used to evaluate the protoporphytin IX (PpIX) effects on X-ray irradiation. Treatment conditions were (1) control group (untreated cells); (2) cells treated with 1 μg /ml PpIX for 6 hours; (3) cells irradiated with 3Gy X-rays; (4) cells treated with 1 μg /ml PpIX for 6 hours prior to irradiation with 3Gy X-rays.
2015-01-21 | GSE61805 | GEO
Project description:Hela cells were used to evaluate the protoporphytin IX (PpIX) effects on X-ray irradiation. Treatment conditions were (1) control group (untreated cells); (2) cells treated with 1 μg /ml PpIX for 6 hours; (3) cells irradiated with 3Gy X-rays; (4) cells treated with 1 μg /ml PpIX for 6 hours prior to irradiation with 3Gy X-rays. Hela cells gene expressions in 4 groups were measured at 24 hours after exposure to 0 and 3 Gy X-rays plus treatment with PpIX prior to irradiation.
2015-01-21 | E-GEOD-61805 | biostudies-arrayexpress
Project description:Background: In the event of an improvised nuclear device detonation, the prompt radiation exposure would consist of γ rays plus a neutron component that would contribute to the total dose. As neutrons cause more complex and difficult to repair damage to cells that would result in more severe health burden to affected individuals, it is paramount to be able to estimate the contribution of neutrons to an estimated dose, to provide information for those making treatment decisions. Results: Mice exposed to either 0.25 or 1 Gy of neutron or 1 or 4 Gy x-ray radiation were sacrificed at 1 or 7 days after exposure. Whole genome microarray analysis identified 7,285 and 5,045 differentially expressed genes in the blood of mice exposed to neutron or x-ray radiation, respectively. Neutron exposure resulted in mostly downregulated genes, whereas x-rays showed both down- and up-regulated genes. A total of 34 differentially expressed genes were regulated in response to all ≥1 Gy exposures at both times. Of these, 25 genes were consistently downregulated at days 1 and 7, whereas 9 genes, including the transcription factor E2f2, showed bi-directional regulation; being downregulated at day 1, while upregulated at day 7. Gene ontology analysis revealed that genes involved in nucleic acid metabolism processes were persistently downregulated in neutron irradiated mice, whereas genes involved in lipid metabolism were upregulated in x-ray irradiated animals. Most biological processes significantly enriched at both timepoints were consistently represented by either under- or over-expressed genes. In contrast, cell cycle processes were significant among down-regulated genes at day 1, but among up-regulated genes at day 7 after exposure to either neutron or x-rays. Cell cycle genes downregulated at day 1 were mostly distinct from the cell cycle genes upregulated at day 7. However, five cell cycle genes, Fzr1, Ube2c, Ccna2, Nusap1, and Cdc25b, were both downregulated at day 1 and upregulated at day 7. Conclusions: We describe, for the first time, the gene expression profile of mouse blood cells following exposure to neutrons. We have found that neutron radiation results in both distinct and common gene expression patterns compared with x-ray radiation.
2017-02-01 | GSE85323 | GEO
Project description:The aim of the study is to disclose the distinct alteration of biological characteristics of gene expression features in pancreas cancer cell, MIAPaCa-2, irradiated by proton and x-ray. The survived MIAPaCa-2 cells after irradiation with proton and x-ray were isolated and gene expression profiles were analyzed.
2017-12-30 | GSE107443 | GEO
Project description:The aim of the study is to disclose the distinct alteration of biological characteristics of gene expression features in pancreas cancer cell, MIAPaCa-2, irradiated by proton and x-ray. The survived MIAPaCa-2 cells after irradiation with proton and x-ray were isolated and gene expression profiles were analyzed.
2017-12-30 | GSE107442 | GEO