Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcriptome Profiles in Normal Human Bronchial Epithelial Cells after Exposure to γ-rays and different HZE particles

ABSTRACT: Distinct transcriptome profiles in response to low-LET and high-LET, and different radiation qualities of HZE particles. Total RNA obtained from HBEC3KT cells after 1, 4, 12 and 24 hours of radiation. Mock-irradiated samples at each time point and control samples before radiation (0 hour) were also collected.

ORGANISM(S): Homo sapiens

SUBMITTER: Lianghao Ding

PROVIDER: E-GEOD-44282 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Distinct transcriptome profiles identified in normal human bronchial epithelial cells after exposure to γ-rays and different elemental particles of high Z and energy.

Ding Liang-Hao LH Park Seongmi S Peyton Michael M Girard Luc L Xie Yang Y Minna John D JD Story Michael D MD

BMC genomics 20130601

<h4>Background</h4>Ionizing radiation composed of accelerated ions of high atomic number (Z) and energy (HZE) deposits energy and creates damage in cells in a discrete manner as compared to the random deposition of energy and damage seen with low energy radiations such as γ- or x-rays. Such radiations can be highly effective at cell killing, transformation, and oncogenesis, all of which are concerns for the manned space program and for the burgeoning field of HZE particle radiotherapy for cancer ...[more]

PMID: 23724988

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Project description:Plants exhibit a robust transcriptional response to gamma radiation which includes the induction of transcripts required for homologous recombination and the suppression of transcripts that promote cell cycle progression. Various DNA damaging agents induce different spectra of DNA damage as well as M-bM-^@M-^\collateralM-bM-^@M-^] damage to other cellular components and therefore are not expected to provoke identical responses by the cell. Here we study the effects of two different types of ionizing radiation (IR) treatment, HZE (1 GeV Fe26+ high mass, high charge, and high energy relativistic particles) and gamma photons, on the transcriptome of Arabidopsis thaliana seedlings. Both types of IR induce small clusters of radicals that can result in the formation of double strand breaks (DSBs), but HZE also produces linear arrays of extremely clustered damage. We performed these experiments across a range of time points (1.5-24 h after irradiation) in both wild-type plants and in mutants defective in the DSB-sensing protein kinase ATM. The two types of IR exhibit a shared double strand break-repair-related damage response, although they differ slightly in the timing, degree, and ATM-dependence of the response. The ATM-dependent, DNA metabolism-related transcripts of the M-bM-^@M-^\DSB responseM-bM-^@M-^] were also induced by other DNA damaging agents, but were not induced by conventional stresses. Both Gamma and HZE irradiation induced, at 24 h post-irradiation, ATM-dependent transcripts associated with a variety of conventional stresses; these were overrepresented for pathogen response, rather than DNA metabolism. In contrast, only HZE-irradiated plants, at 1.5 h after irradiation, exhibited an additional and very extensive transcriptional response, shared with plants experiencing M-bM-^@M-^\extended night.M-bM-^@M-^] This response was not apparent in gamma-irradiated plants. We treated 5-day-old WT and atm-1 seedlings of Arabidopsis thaliana with 100 Gy of Gamma radiation (over a span of 15 minutes) or 30 Gy of HZE (over a span of approximately 12 minutes). Gamma irradiations were completed at 8:40 am, while HZE irradiations were conducted in two runs (due to space limitations) which were completed at 1:09 and 1:28pm respectively. Gamma treated seedlings were sampled at 10:10 am, 11:40 am, 2:55 pm, 8:40 pm, and 8:40 am. HZE treated seedlings were sampled at 2:39 pm, 4:09 pm, 7:24 pm, 1:09 am, and 1:09 pm. Un-irradiated WT and atm-1 control seedlings were sampled at 10:45 am on Day #1 and 9:15 am on Day #2. There are a total of 22 experimental or control conditions, with two replicates per condition, yielding 44 samples overall.

Dataset Information

Transcriptome Profiles in Normal Human Bronchial Epithelial Cells after Exposure to γ-rays and different HZE particles

Publications

Distinct transcriptome profiles identified in normal human bronchial epithelial cells after exposure to γ-rays and different elemental particles of high Z and energy.

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