Bj Paraquat prolonged exposure vs. non-treatment
Ontology highlight
ABSTRACT:
ORGANISM(S): Bradyrhizobium japonicum Bradyrhizobium diazoefficiens USDA 110
PROVIDER: GSE26252 | GEO | 2011/05/16
SECONDARY ACCESSION(S): PRJNA142321
REPOSITORIES: GEO
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Project description:Genome-wide transcriptional profiling of cells exposed to 0.1 mM paraquat from time of inoculation. Three independent biological materials were prepared for cells exposed to 0.1 mM paraquat during growth and non-treated cells. A total 6 arrays which includes dye swap were analyzed.
2011-05-15 | E-GEOD-26252 | biostudies-arrayexpress
Project description:Genome-wide transcriptional profiling of cells exposed to 0.3 mM H2O2 from time of inoculation.
2011-07-30 | GSE26960 | GEO
Project description:Genome-wide transcriptional profiling of cells exposed to 0.3 mM H2O2 from time of inoculation. Three independent biological materials were prepared for cells exposed to 0.3 mM H2O2 during growth and non-treated cells. A total 6 arrays which includes dye swap were analyzed
2011-07-29 | E-GEOD-26960 | biostudies-arrayexpress
Project description:Genome-wide transcriptional profiling of cells subjected to a paraquat fulminant shock treatment (5mM for 10 minutes).
2011-05-16 | GSE26236 | GEO
Project description:Genome-wide transcriptional profiling of cells subjected to a paraquat fulminant shock treatment (5mM for 10 minutes). Three independent biological materials were prepared for cells shock treated with paraquat and non-treated cells. A total 6 arrays which includes dye swap were analyzed.
2011-05-15 | E-GEOD-26236 | biostudies-arrayexpress
Project description:This SuperSeries is composed of the following subset Series: GSE26236: Bj Paraquat fulminant shock vs. non-treatment GSE26252: Bj Paraquat prolonged exposure vs. non-treatment Refer to individual Series
2011-05-15 | E-GEOD-26531 | biostudies-arrayexpress
Project description:Genome-wide transcriptional profiling of cells subjected to a H2O2 shock treatment (10 mM for 10 minutes).
2011-07-30 | GSE26961 | GEO
Project description:Cigarette smoking is associated with reduced risk of developing Parkinson’s disease (PD). To identify genes that interact with nicotine/smoking, we performed hypothesis-free genome-wide experiments in a paraquat-induced Drosophila model and in a case-control study of PD. We demonstrated that nicotine extends life-span in paraquat-treated Drosophila (P=4E-30). Brain tissue from flies treated with combinations of paraquat and nicotine revealed elevated expression of CG14691 with paraquat which was restored with nicotine co-treatment (P(interaction)=2E-11, P(FDR-adjusted)=4E-7). Independently, variants in the 5’ region of SV2C, a human ortholog of CG14691, gave the strongest signal for interaction with smoking (P(interaction)=9E-8). The effect of smoking on PD risk varied six-fold by SV2C genotype (P(heterogeneity)=4E-10). Moreover, SV2C variants identified here were associated with SVC2 gene-expression in the HapMap data. Present results suggest synaptic vesicle protein SV2C plays a role in PD pathogenesis, and that the SV2C genotype may be useful for clinical trials of nicotine for treating PD. Drosophila female heads were dissected after exposure to plain food, food with paraquat, food with nicotine, or food with both paraquat and nicotine, and genome-wide expression was quantified using Affymetrix microarrays. 20 heads were pooled per replicate, with each treatment in triplicate, and all flies were dissected at the same timepoint, after 10 days of pretreatment (with 0.1 mg/ml nicotine or no nicotine, depending on treatment group), and then a further 6 days of treatment with either 5 mM paraquat or no paraquat, continuing on the pretreatment dose of nicotine. One biological replicate in the paraquat-only group showed RNA degradation and was not included in the normalization or subsequent analyses.
2012-09-05 | E-GEOD-35930 | biostudies-arrayexpress
Project description:This SuperSeries is composed of the SubSeries listed below.
2011-05-16 | GSE26531 | GEO
Project description:Exposure to Paraquat and RNA interference knockdown of mitochondrial superoxide dismutase (Sod2) are known to result in significant lifespan reduction, locomotor dysfunction, and mitochondrial degeneration in Drosophila melanogaster. Both perturbations increase the flux of superoxide, a progenitor reactive oxygen species, but the molecular underpinnings of the resulting phenotypes are poorly understood. Improved understanding of such processes could lead to advances in the treatment of numerous age-related disorders. Superoxide toxicity can act through protein carbonylation. Analysis of carbonylated proteins is attractive since reactive carbonyl groups are not present in the twenty canonical amino acids and are amenable to labeling and enrichment strategies. Here, carbonylated proteins were labeled with biotin hydrazide and enriched on streptavidin-coated beads. On-bead digestion was used to release carbonylated protein peptides, with relative abundance ratios versus controls obtained using the iTRAQ mass spectrometry-based proteomics approach. While Paraquat exposure and Sod2 knockdown have similar phenotypes, differences in protein carbonylation were anticipated because Paraquat exposure was expected to increase the concentration of superoxide throughout the cell while Sod2 knockdown was only expected to raise the concentration of superoxide in the mitochondrial matrix. Paraquat exposure resulted in widespread increases in carbonylated protein relative abundance: the median Paraquat-exposed to control carbonylated protein relative abundance ratio was 1.53. For Sod2 knockdown, in contrast, the median carbonylated protein relative abundance ratios were 1.13 versus the RNA interference driver control and 1.05 versus the RNA interference transgene control. However, some proteins did show large increases in carbonylated protein relative abundance on Sod2 knockdown, most notably cytochrome c oxidase subunit Vb, possibly providing some indication of the molecular basis of the Sod2-knockdown phenotype.
2014-11-26 | PXD001528 | Pride