Homo sapiens
Ontology highlight
ABSTRACT:
OTHER RELATED OMICS DATASETS IN: E-GEOD-10979
PROVIDER: PRJNA107177 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:The environmental carcinogen, (±)-anti-benzo[a]pyrene-7,8-diol-9,10-epoxide (BPDE), causes bulky-adduct DNA damages, triggers certain signaling pathways, and elicits gene expression changes. Here, we focused on the temporal gene expression changes induced by a low concentration (0.05 µM) BPDE in human amnion epithelial FL cells. Differential gene expression profiles at 1, 10 and 22 h post BPDE treatment were obtained using Affymetrix HG-U133 Plus 2.0 oligonucleotide microarrays. A cohort of gene expression changes related to cell cycle progression, cell growth or apoptosis, stress response, and post-transcriptional regulation was validated with quantitative real-time RT-PCR. The alteration of several cell cycle-related genes was correlated and possibly contributed to the cell cycle arrest phenotype. Paradoxical transcriptional regulations regarding cell growth or apoptosis emerged in response to BPDE treatment, which indicated that cell fate was determined by integrated signals. The temporal transcriptional changes would be of help to clarify the molecular mechanism of cellular response to BPDE. Experiment Overall Design: Human amnion epithelial FL cells were exposed to vehicle control (dimethyl sulfoxide) and a low concentration (0.05 µM) (±)-anti-benzo[a]pyrene-7,8-diol-9,10-epoxide, respectively. The differential gene expression profiles at 1, 10 and 22 h post BPDE treatment were obtained using Affymetrix HG-U133 Plus 2.0 oligonucleotide microarrays. The transcriptomic changes at different time points post BPDE treatment would provide insight into the dynamic processes of cellular response to this genotoxic agent.
2009-01-14 | E-GEOD-10979 | biostudies-arrayexpress
Project description:The environmental carcinogen, (±)-anti-benzo[a]pyrene-7,8-diol-9,10-epoxide (BPDE), causes bulky-adduct DNA damages, triggers certain signaling pathways, and elicits gene expression changes. Here, we focused on the temporal gene expression changes induced by a low concentration (0.05 µM) BPDE in human amnion epithelial FL cells. Differential gene expression profiles at 1, 10 and 22 h post BPDE treatment were obtained using Affymetrix HG-U133 Plus 2.0 oligonucleotide microarrays. A cohort of gene expression changes related to cell cycle progression, cell growth or apoptosis, stress response, and post-transcriptional regulation was validated with quantitative real-time RT-PCR. The alteration of several cell cycle-related genes was correlated and possibly contributed to the cell cycle arrest phenotype. Paradoxical transcriptional regulations regarding cell growth or apoptosis emerged in response to BPDE treatment, which indicated that cell fate was determined by integrated signals. The temporal transcriptional changes would be of help to clarify the molecular mechanism of cellular response to BPDE. Keywords: time course
2009-01-01 | GSE10979 | GEO
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Project description:The alkylating agent N-methyl-N'-nitro-N-nitrosoguanidine (MNNG) is a direct mutagen and carcinogen, causing DNA damage and other comprehensive alterations that lead to chromosomal aberrations, mutations, tumor initiation, and cell death. Our previous study revealed that MNNG at different concentrations could induce extensive changes in gene expression at an early stage of exposure. To further understand the dynamic cellular responses and hazardous effects caused by this environmental carcinogen, we used a whole-genome time-course screening methods to find out the gene expression changes induced by a low concentration of MNNG in human normal amnion epithelial FL cells. The cells were exposed to 1.0 M-BM-5M MNNG, and differential gene expression profiles at 3, 12, and 24 h after MNNG treatment were obtained by use of Affymetrix HG-U133 Plus 2.0 oligonucleotide microarray technology, followed by quantitative real-time RT-PCR validation. The results showed that the low-dose MNNG exposure triggered extensive but moderate changes in gene expression at these three experiment time points after exposure. The responsive genes encode important proteins, including cell cycle regulators, transcription factors and signal transducers that determine cell cycle progression, cell fate and other activities associate with pro-oncogenic potentials. The differential gene expression profiles at the three time points varied greatly, and generally reflected a cellular responsive process from initiation to progression and to recovery after MNNG exposure. These results will aid our understanding of the complicated mechanisms of MNNG-induced cellular responses. KeywordsM-oM-<M-^ZN-methyl-N'-nitro-N-nitrosoguanidine; Cellular response; Temporal gene expression change; Oligonucleotide microarray; Quantitative real-time RT-PCR Human amnion epithelial FL cells were exposed to vehicle control (dimethyl sulfoxide) and a low concentration (1.0 M-BM-5M) MNNG for 2 h, respectively. The differential gene expression profiles at 3, 12 and 24 h post MNNG treatment were obtained using Affymetrix HG-U133 Plus 2.0 oligonucleotide microarrays. The transcriptomic changes at different time points post MNNG treatment would provide insight into the dynamic processes of cellular response to this genotoxic agent.
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