Homo sapiens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA117647 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Accumulating data suggest that the biological responses to high and low doses of radiation are qualitatively different, necessitating the direct study of low dose responses. Most such studies have utilized 2-dimensional culture systems, which may not fully represent responses in 3-dimensional tissues. To gain insight into low dose responses in tissue, we have profiled global gene expression in EPI-200, a 3-dimensional tissue model that imitates the structure and function of human epidermis, at 4, 16 and 24 hours after exposure to high (2.5 Gy) and low (0.1 Gy) doses of low LET protons. The most significant gene ontology groups among genes altered in expression were consistent with effects observed at the tissue level, where the low dose was associated with gradual recovery and tissue remodeling, while the high dose resulted in loss of structural integrity and terminal differentiation. Network analysis of the significantly responding genes suggested that TP53 dominated the response to 2.5 Gy, while HNF4A, a novel transcription factor not previously associated with radiation response, was most prominent in the low dose response. Thus, these studies address the molecular basis of response to low versus high dose low LET radiation exposure. Radiation induced gene expression in 3-dimensional tissue model, Epi-200, was measured at 4, 16 and 24 hours after exposure to doses of 0, 0.1 and 2.5 Gy of protons. Three independent experiments were performed in the each time (4, 16 and 24 hours) using one tissue sample per a data point.
2010-06-08 | E-GEOD-20629 | biostudies-arrayexpress
Project description:Accumulating data suggest that the biological responses to high and low doses of radiation are qualitatively different, necessitating the direct study of low dose responses. Most such studies have utilized 2-dimensional culture systems, which may not fully represent responses in 3-dimensional tissues. To gain insight into low dose responses in tissue, we have profiled global gene expression in EPI-200, a 3-dimensional tissue model from MatTek that imitates the structure and function of human epidermis, at 4, 16 and 24 hours after exposure to high (2.5 Gy) and low (0.1 Gy) doses of low LET protons.
2011-07-01 | GSE16935 | GEO
Project description:Accumulating data suggest that the biological responses to high and low doses of radiation are qualitatively different, necessitating the direct study of low dose responses. Most such studies have utilized 2-dimensional culture systems, which may not fully represent responses in 3-dimensional tissues. To gain insight into low dose responses in tissue, we have profiled global gene expression in EPI-200, a 3-dimensional tissue model from MatTek that imitates the structure and function of human epidermis, at 4, 16 and 24 hours after exposure to high (2.5 Gy) and low (0.1 Gy) doses of low LET protons. Untreated controls and samples exposed to 10 cGy or to 2.5 Gy were analyzed at three different times (4, 16 or 24 hours after exposure). Three biological repeats were performed for each condition
2011-07-01 | E-GEOD-16935 | biostudies-arrayexpress
Project description:Accumulating data suggest that the biological responses to high and low doses of radiation are qualitatively different, necessitating the direct study of low dose responses. Most such studies have utilized 2-dimensional culture systems, which may not fully represent responses in 3-dimensional tissues. To gain insight into low dose responses in tissue, we have profiled global gene expression in EPI-200, a 3-dimensional tissue model that imitates the structure and function of human epidermis, at 4, 16 and 24 hours after exposure to high (2.5 Gy) and low (0.1 Gy) doses of low LET protons. The most significant gene ontology groups among genes altered in expression were consistent with effects observed at the tissue level, where the low dose was associated with gradual recovery and tissue remodeling, while the high dose resulted in loss of structural integrity and terminal differentiation. Network analysis of the significantly responding genes suggested that TP53 dominated the response to 2.5 Gy, while HNF4A, a novel transcription factor not previously associated with radiation response, was most prominent in the low dose response. Thus, these studies address the molecular basis of response to low versus high dose low LET radiation exposure.
2010-06-01 | GSE20629 | GEO
Project description:Biological response to 2.5 Gy of X-rays in 3-dimensional skin model, Epi-200.
| PRJNA130591 | ENA
Project description:Global gene expression responses to low doses of protons in a human 3-dimensional skin model
| PRJNA124843 | ENA
Project description:Most studies have analysed the effects of high dose radiation such as atomic bomb survivors in Japan, people exposed during the Chernobyl nuclear accident, patients undergoing radiation therapy, uranium miners, etc. However, it has been difficult to measure and assess the risk of cancer in people exposed to lower doses of ionising radiation, such as the people living at high altitudes, who are exposed to more natural background radiation from cosmic rays than people at sea level. We measured the genomic response to X-ray ionising radiation (10 cGy and 100 cGy) in a skin tissue model to compare the effects of low and high dose ionising radiation at different time points. The microarray data was then analysed using state-of-the art “upside-down pyramid” computational systems biology methods to identify genes contributing to the difference in the response to the different radiation doses. The model is reconstructed skin tissue, which is composed of keratinocytes that make up the epidermal layer, and fibroblasts that make up the dermal layer of the skin. Tissues were irradiated with 0, 10, and 100 cGy X-ray radiation. Skin plugs were harvested at 0, 3, 8, and 24 hours post irradiation.
2012-02-01 | E-GEOD-29344 | biostudies-arrayexpress
Project description:Low and high doses of X-rays are used in medicine as diagnostic and therapeutic tools, respectively. While response to high doses of radiation is well known, contradictions exist about effects of low-dose irradiation. Therefore, improving the knowledge on the consequences of low-dose irradiation could help to address this controversy. Moreover, describing new insights into high-dose irradiation would improve new cancer therapies combining radiation and gene therapy. As long non-coding RNAs (lncRNAs) seems to be engaged to almost all biological functions, including response to DNA damage, we aimed to describe the participation of lncRNAs in the response to different doses of X-ray exposure. We observed that, in human breast epithelial cells, different sets of coding and non-coding transcripts are differentially regulated at moderate and high doses compared to low doses. The validation of expression of five lncRNAs only regulated at high and moderate X-ray doses supports our results. Altogether, we could conclude that response to moderate and high dose irradiation versus response to low-doses also differs in terms of lncRNA expression. Therefore, further studies on the participation of lncRNAs in this response to radiation would help to address controversies regarding low-dose irradiation response and to improve therapies using high-dose irradiation.
2016-08-31 | GSE76357 | GEO
Project description:Direct irradiation of 3-dimensional skin model, Epi-200, with alpha-particles led to differential regulation of 545 genes at 4 h postirradiation. Unlike the traditional 2-dimensional in vitro systems, Epi-200 made of the primary cells, epidermal human keratinocytes. It mimics the structure of the human epidermis Global gene expression is a powerful tool for uncovering both fundamental signaling processes and the mechanistic basis of cellular or physiological effects. By comparing irradiated tissues with non-irradiated control, we have been able to measure global gene expression responses and reveal the affected biological pathways and molecular functions. The data were analyzed using BRB-Array Tools (NIH), and further gene ontology analysis was performed with Panther (Applied Biosystems). The responding pathways were identified jointly and separately for up- and downregulated genes. Receptors (12 genes, p=0.0467), including nuclear hormone receptors (3 genes, p=8.2 x E-04) and Ser/Thr receptors (3 genes, p=5.3 x E-03), chemokines (2 genes, p=0.0155) and signaling molecules were overrepresented among 123 upregulated genes while DNA binding proteins (27 genes, p=5.07 x E-04), particularly helicases (6 genes, p=3.61 x E-03) and, G-protein modulators (16 genes, p=4.4 x E-03) were overrepresented among 403 downregulated genes. Remarkably, 6 differentially regulated genes in this group were represented by helicases and methyltransferases (6 genes, p=0. 0534) involved in methylation of histones and DNA. These changes confirmed an importance in the biological response of two its basic components: receptor-regulated pathways and chromatin remodeling. Upregulation the first group supposes to increase sensitivity of irradiated cells to chemokines and cytokines while downregulation of the second group would likely affect the DNA methylation pattern and stimulate the transcription. Radiation induced gene expression in 3-dimensional tissue model, Epi-200, was measured at 4 hours after exposure to 0.5 Gy of alpha-particles. Three independent experiments were performed using one tissue sample per a data point.
2011-08-30 | E-GEOD-23903 | biostudies-arrayexpress
Project description:TMPyP4 promotes cancer cell migration at low doses, but induces cell death at high doses
| PRJNA295536 | ENA