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In vivo gene expression changes in human blood cells in response to radiation therapy.

ABSTRACT: Our in vivo study measures miRNA and gene expression changes in human blood cells in response to ionizing radiation in order to develop miRNA signatures that can be used as biomarkers for radiation exposure. Blood was collected from 8 radiotherapy patients immediately prior to and at 4 h after total body irradiation with 1.25 Gy X-rays. Both miRNA and gene expression changes were measured by means of quantitative PCR and microarray hybridization, respectively. Patients were in complete remission at the time of blood collection. Out of 223 differentially expressed genes, 37 were both downregulated and predicted targets of the upregulated miRNAs. Both miRNA and gene control of biological processes such as hemopoiesis and the immune response is increased after irradiation, whereas metabolic processes are underrepresented among all differentially expressed genes and the genes controlled by miRNAs.

ORGANISM(S): Homo sapiens

PROVIDER: GSE23393 | GEO | 2010/08/05

SECONDARY ACCESSION(S): PRJNA131289

REPOSITORIES: GEO

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In vivo gene expression changes in human blood cells in response to radiation therapy.

Project description:Our in vivo study measures miRNA and gene expression changes in human blood cells in response to ionizing radiation in order to develop miRNA signatures that can be used as biomarkers for radiation exposure. Blood was collected from 8 radiotherapy patients immediately prior to and at 4 h after total body irradiation with 1.25 Gy X-rays. Both miRNA and gene expression changes were measured by means of quantitative PCR and microarray hybridization, respectively. Patients were in complete remission at the time of blood collection. Out of 223 differentially expressed genes, 37 were both downregulated and predicted targets of the upregulated miRNAs. Both miRNA and gene control of biological processes such as hemopoiesis and the immune response is increased after irradiation, whereas metabolic processes are underrepresented among all differentially expressed genes and the genes controlled by miRNAs. Sixteen human whole-blood samples were included in this study. Eight samples were collected shortly before total body irradiation. The other 8 samples were collected at 4 h after total body irradiation with 1.25 Gy X-rays.

2010-08-05 | E-GEOD-23393 | biostudies-arrayexpress

RADIATION-INDUCED MODIFICATIONS IN MICRO-RNA AND PROTEOMIC CARGO IN PLASMA-DERIVED EXTRACELLULAR VESICLES

Project description:In this study, to delineate the radiation-induced changes in miRNAs and protein cargo, we established the microRNA and proteome profiles of plasma EVs collected from mice that had been sham- (SI), whole body (WBI), or partial body irradiated (PBI) with 2 Gy X-rays 24 hours before. The radiation-induced changes in the miRNA and protein composition of EVs can influence the stress response of distant cells by propagating damaging or protective signals. Testing EVs in functional assays may be a read out of the multiple radiation-induced signaling networks, crucial for gaining an understanding of the EVs properties. Therefore, to functionally elucidate the pathophysiological changes in the contents of EVs induced by irradiation, we here investigated the EV-induced cellular responses in vivo, by injecting WBI, PBI and SI plasma-derived EVs in the cerebellum of neonatal mice, highly susceptible to radiation injury, and evaluating the level of apoptosis.

2022-03-10 | PXD026408 | Pride

Whole blood gene expression profiling at day 1, 3 and 7 after total-body irradiation in Gottingen minipigs

Project description:Gottingen minipigs mirror the physiological radiation response observed in humans and hence make an ideal candidate model for studying radiation biodosimetry for both limited-sized and mass casualty incidents. We examined the whole blood gene expression profiles at day 1, 3 and 7 after total-body irradiation with 1.7, 1.9, 2.1 and 2.3 Gy doses of gamma-rays. Blood taken one day prior to radiation served as control. Six animals per dose group were used The minipigs were monitored for up to 45 days or time to euthanasia necessitated by radiation effects. Survival correlative signatures were identified from the data.

2022-04-25 | GSE173427 | GEO

Effects of simulated space radiations on the tomato root proteome

Project description:Plant cultivation on spacecraft or planetary outposts is a promising and actual perspective both for food and bioactive molecules production. To this aim, plants response to ionizing radiations, as an important component of space radiation, must be assessed through on-ground experiments due to the potentially fatal effects on living systems. Hereby we investigated the effects of X-rays and -rays exposure on tomato ‘hairy root’ cultures (HRCs), which represent a solid platform for the production of pharmaceutically relevant molecules, including metabolites and recombinant proteins. In a space application perspective, we used a HRC system previously fortified through the accumulation of anthocyanins, which are known for their anti-oxidant properties. Roots were independently exposed to different photon radiations, namely X-rays (250 kV) and -rays (Co60, 1.25 MeV), both at the intensity of 0.5, 5 and 10 Gy. Molecular changes induced in the proteome of HRCs were investigated by a comparative approach based on Two-Dimensional Difference In-Gel electrophoresis (2D-DIGE) technology and mass spectrometry.

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Response of mammary tissue to high-LET HZE particle (Silicon ions) radiation or low-LET gamma-rays

Project description:Transcriptional profiling of mammary tissue irradiated at 10 weeks of age with either 100 cGy sparsely ionizing gamma-rays, or 10 cGy or 30 cGy densely ionizing radiation (350 MeV/amu Si). Mammary tissue was collected 1 weeks, 4 weeks, and 12 weeks post-irradiation. Four radiation treatment groups: sham, 100 cGy sparsely ionizing gamma-rays, 10 cGy or 30 cGy densely ionizing radiation (350 MeV/amu Si). Three time points post-irradiation (1, 4, and 12 weeks). Three or four replicates per time point.

2013-11-30 | E-GEOD-48392 | biostudies-arrayexpress

Changes in miRNA in the lung and blood after whole thorax irradiation in rats: biomarkers for radiation-induced injuries

Project description:We used a rat model of whole thorax x-ray irradiation to profile the microRNA (miRNA) in lung and blood up to 4 weeks after radiation. Small RNA from normal and irradiated Wistar rat lungs and blood were analyzed by next-generation sequencing and the changes by radiation were identified by deRNA-seq at 1, 2, 3 and 4 weeks after irradiation. The average total reads/library was 2,703,137 with a mean of 88% mapping to the rat genome. Detailed profiles of 100 of the most abundant miRNA in rat blood and lung are described.

2017-04-25 | GSE86567 | GEO

MicroRNA-449a Enhances Radiosensitivity in Lung Adenocarcinoma Cells

Project description:Twenty-five miRNAs were identified as having differential expression post-irradiation in CL1-0 or CL1-5 cells. Among these miRNAs, miR-449a, which was down-regulated in CL1-0 cells at 24 h after irradiation, was chosen for further investigation. Overexpression of miR-449a in CL1-0 cells effectively increased irradiation-induced DNA damage and apoptosis, altered the cell cycle distribution and eventually led to sensitization of CL1-0 to irradiation. MiR-449a might be a novel radiosensitizer for clinical applications. Two lung adenocarcinoma cell lines (CL1-0 and CL1-5) with different metastatic ability and radiosensitivity were used. In order to understand the regulatory mechanisms of differential radiosensitivity in these isogenic tumor cells, both CL1-0 and CL1-5 were treated with 10 Gy radiation, and were harvested respectively at 0, 1, 4, and 24 h after radiation exposure. The changes in expression of miRNA upon irradiation were examined using Illumina Human microRNA BeadChips.

2012-12-30 | E-GEOD-40602 | biostudies-arrayexpress

Identification of miRNAs involved in cell response to ionising radiation and modeled microgravity

Project description:BACKGROUND: Ionizing radiation (IR) can be extremely harmful for human cells since an improper DNA-damage response (DDR) to IR can contribute to carcinogenesis initiation. Perturbations in DDR pathway can originate from alteration in the functionality of the microRNA-mediated gene regulation, being microRNAs (miRNAs) small noncoding RNA that act as post-transcriptional regulators of gene expression. In this study we gained insight into the role of miRNAs in the regulation of DDR to IR under microgravity, a condition of weightlessness experienced by astronauts during space missions, which could have a synergistic action on cells, increasing the risk of radiation exposure. METHODOLOGY/PRINCIPAL FINDINGS: We analyzed miRNA expression profile of human peripheral blood lymphocytes (PBL) incubated for 4 and 24 h in normal gravity (1 g) and in modeled microgravity (MMG) during the repair time after irradiation with 0.2 and 2Gy of γ-rays. Our results show that MMG alters miRNA expression signature of irradiated PBL by decreasing the number of radio-responsive miRNAs. Moreover, let-7i*, miR-7, miR-7-1*, miR-27a, miR-144, miR-200a, miR-598, miR-650 are deregulated by the combined action of radiation and MMG. Integrated analyses of miRNA and mRNA expression profiles, carried out on PBL of the same donors, identified significant miRNA-mRNA anti-correlations of DDR pathway. Gene Ontology analysis reports that the biological category of "Response to DNA damage" is enriched when PBL are incubated in 1 g but not in MMG. Moreover, some anti-correlated genes of p53-pathway show a different expression level between 1 g and MMG. Functional validation assays using luciferase reporter constructs confirmed miRNA-mRNA interactions derived from target prediction analyses. CONCLUSIONS/SIGNIFICANCE: On the whole, by integrating the transcriptome and microRNome, we provide evidence that modeled microgravity can affects the DNA-damage response to IR in human PBL.

2012-04-09 | GSE20120 | GEO

Gene expression profiling of PBL in response to ionising radiation and modeled microgravity

2012-04-10 | GSE20173 | GEO

Radiation-induced genes expressed in two murine tumors.

Project description:Gene expression profiling was used to identify genes that display radiation-induced transcriptional change over tumor histopathology. Keywords: mouse squamous cell carcinoma, fibrosarcoma and mammary carcinoma, gamma-irradiation, carbon ion irradiation, resected sample, transplanted tissues C3H/HeMs male mice were irradiated by gamma-rays (30Gy, 50Gy, 70Gy) or carbon ions (30Gy) as local irradiation in single doses to hind legs where each tumor was transplanted. Animals were sacrificed either before irradiation (pre) or 1 day after irradiation (day 1) for expression analysis.

2009-03-20 | E-GEOD-5331 | biostudies-arrayexpress

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