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Effects of Ionizing Radiation on Self Renewal and Pluripotency of Human Embryonic Stem Cells

ABSTRACT: Human embryonic stem cells (hESCs) present a novel platform for in vitro investigation of the early embryonic cellular response to ionizing radiation. Thus far, no study has analyzed the genome-wide transcriptional response to ionizing radiation in hESCs. In this study, we use Agilent microarrays to analyze the global gene expression changes in H9 hESCs after low (0.4 Gy), medium (2 Gy), and high (4 Gy) dose irradiation.

ORGANISM(S): Homo sapiens

PROVIDER: GSE20951 | GEO | 2010/06/16

SECONDARY ACCESSION(S): PRJNA124437

REPOSITORIES: GEO

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Effects of Ionizing Radiation on Self Renewal and Pluripotency of Human Embryonic Stem Cells

Project description:Human embryonic stem cells (hESCs) present a novel platform for in vitro investigation of the early embryonic cellular response to ionizing radiation. Thus far, no study has analyzed the genome-wide transcriptional response to ionizing radiation in hESCs. In this study, we use Agilent microarrays to analyze the global gene expression changes in H9 hESCs after low (0.4 Gy), medium (2 Gy), and high (4 Gy) dose irradiation. Undifferentiated H9 hESCs were cultured on Matrigel in feeder-free conditions, and exposed to ionizing radiation at the indicated dosage (or control) from a Cesium-137 irradiator. Total RNA was isolated 24 hours after irradiation in the same feeder-free culture conditions. Experiment was repeated three times for each group, yielding a total of 12 distinct samples.

2010-07-08 | E-GEOD-20951 | biostudies-arrayexpress

Transcriptional response of lymphoblastoid cells to ionizing radiation

Project description:Time series for gene expression changes following 3 Gy and 10 Gy of ionizing radiation exposure. Keywords: time-course

2003-10-08 | GSE701 | GEO

Transcription profiling of human lymphoblastoid cells following 3 Gy and 10 Gy of ionizing radiation exposure to identify transcriptional response of lymphoblastoid cells to ionizing radiation

Project description:Time series for gene expression changes following 3 Gy and 10 Gy of ionizing radiation exposure.

2007-09-21 | E-GEOD-701 | biostudies-arrayexpress

ATM Requirement in Gene Expression Responses to Ionizing Radiation in Human Lymphoblasts and Fibroblasts

Project description:Investigation of ATM-dependent and dose-dependent, or -independent, responses were examined in human lymphoblast cells 6 hr following exposure to either 1 or 5 Gy ionizing radiation. Human lymphoblast cells from "apparently healthy" individuals and individuals with Ataxia telangiectasia were exposed to 1 Gy or 5 Gy ionizing radiation. Gene expression responses 6 hr following IR were examined. Untreated samples were hybridized together with their matched treated samples.

2010-07-01 | E-GEOD-3174 | biostudies-arrayexpress

The response to ionizing radiation at the exon level

Project description:Humans are exposed to ionizing radiation (IR) from background radiation, medical treatments, occupational and accidental exposures. IR causes profound changes in transcription. Transcription is a primary process where protein amount and function can be regulated. One aspect of the transcriptional IR response that little is known about on a whole genome basis is alternative transcription. These investigations focus on the response to IR at the exon level in human cells but also at the whole gene level. Whole genome exon arrays were utilized to comprehensively characterize radiation-induced transcriptional expression products in two human cell types, namely EBV-transformed lymphoblast and primary fibroblast cell lines. 12 human primary fibroblast cell lines and 12 primary lymphoblast cell line samples were used for two doses (0 and 10 Gy) and two time points (0 and 4hr). Additional doses ( 1 Gy, 2 Gy, 5 Gy, and 20 Gy) and time points ( 1hr, 2hr, 8hr, 24hr and 48hr) were assessed in four lymphoblast cell lines and four primary fibroblasts.

2011-05-02 | E-GEOD-26841 | biostudies-arrayexpress

ATM Requirement in Gene Expression Responses to Ionizing Radiation in Human Lymphoblasts and Fibroblasts

2006-01-15 | GSE3174 | GEO

In Vitro Characterization of A4573 Preclinical Radiation-Adapted Model for Ewing Sarcoma

Project description:Analysis of differentially expressed genes in wild type A4573 Ewing Sarcoma cells when compared to A4573 Ewing Sarcoma cells that received six 4 Gy fractions (cumulative dose of 24 Gy) of ionizing radiation (radiation-adapted cell line). The hypothesis tested being that repeated ionizing radiation exposure of modifies radiation therapy response in Ewing Sarcoma.

2017-05-10 | GSE98706 | GEO

In Vitro Characterization of SK-ES1 Preclinical Radiation-Adapted Model for Ewing Sarcoma

Project description:Analysis of differentially expressed genes in wild type SK-ES1 Ewing Sarcoma cells when compared to SK-ES1 Ewing Sarcoma cells that received six 4 Gy fractions (cumulative dose of 24 Gy) of ionizing radiation (radiation-adapted cell line). The hypothesis tested being that repeated ionizing radiation exposure of modifies radiation therapy response in Ewing Sarcoma.

2017-05-10 | GSE98711 | GEO

In Vitro Characterization of MHH-ES-1 Preclinical Radiation-Adapted Model for Ewing Sarcoma

Project description:Analysis of differentially expressed genes in wild type MHH-ES-1 Ewing Sarcoma cells when compared to MHH-ES-1 Ewing Sarcoma cells that received six 4 Gy fractions (cumulative dose of 24 Gy) of ionizing radiation (radiation-adapted cell line). The hypothesis tested being that repeated ionizing radiation exposure of modifies radiation therapy response in Ewing Sarcoma.

2017-05-10 | GSE98709 | GEO

Ionizing radiation in GI tract of Tweak KO mice

Project description:TWEAK/Fn14 signaling may regulate the expression of genes involved in epithelial repair and mucosal inflammation. Comparing the gene signatures in WT and TWEAK KO mice will inform the biology of TWEAK/Fn14 pathway in the GI tract. Mice were treated with 3 Gy of ionizing radiation. After 6h and 24h mice were sacrificed, and whole colon and jejunum were harvested, and RNA was isolated from these tissues. Each CEL file represents a different mouse.

2011-07-01 | E-GEOD-25029 | biostudies-arrayexpress

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