Analysis of xenobiotic organisms
Ontology highlight
ABSTRACT:
PROVIDER: PRJEB48538 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Southwest carbon cycling organisms Metagenomic assembly
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Project description:A definition of RNA expression changes that correlate with liver response programs and an understanding of the similarities and differences in responses to different classes of chemicals would aid in new chemical or drug characterization and add to our understanding of liver biology. We have used a supervised classification approach to systematically mine a large microarray database derived from livers of compound-treated rats. Thirty-four distinct signatures (classifiers) for pharmacological and toxicological endpoints resolvable by gene expression can be identified. The contribution of genes to signatures is not correlated to average expression or amplitude of regulation, and pre-selection of genes can significantly reduce signature performance. Just 200 genes are sufficient to classify all endpoints and can form the basis of a small diagnostic array useful in toxicogenomics. Signature genes were enriched in xenobiotic and acute phase response genes as well as un-annotated genes, suggesting that not all key genes in liver xenobiotic responses have been identified. Individual signatures can be re-derived up to 25 times from a gene set cyclically .stripped. of the signature genes. The union of these non-overlapping sets was used to describe the biological mechanisms of liver fibrosis. Guidelines for commercial use: http://www.iconixbiosciences.com/guidelineCommUse.pdf Keywords: dose response, time course, compound treatment
2008-03-28 | GSE8858 | GEO
Project description:A definition of RNA expression changes that correlate with liver response programs and an understanding of the similarities and differences in responses to different classes of chemicals would aid in new chemical or drug characterization and add to our understanding of liver biology. We have used a supervised classification approach to systematically mine a large microarray database derived from livers of compound-treated rats. Thirty-four distinct signatures (classifiers) for pharmacological and toxicological endpoints resolvable by gene expression can be identified. The contribution of genes to signatures is not correlated to average expression or amplitude of regulation, and pre-selection of genes can significantly reduce signature performance. Just 200 genes are sufficient to classify all endpoints and can form the basis of a small diagnostic array useful in toxicogenomics. Signature genes were enriched in xenobiotic and acute phase response genes as well as un-annotated genes, suggesting that not all key genes in liver xenobiotic responses have been identified. Individual signatures can be re-derived up to 25 times from a gene set cyclically .stripped. of the signature genes. The union of these non-overlapping sets was used to describe the biological mechanisms of liver fibrosis. Guidelines for commercial use: http://www.iconixbiosciences.com/guidelineCommUse.pdf Keywords: dose response, time course, compound treatment Treatment of male Sprague-Dawley rats with 344 compounds at various doses and durations, in biological triplicate, along with vehicle-matched control animals. Liver samples were assayed for gene expression. A total of 1695 samples were hybridized to single-channel CodeLink RU1 arrays. Biological triplicates were combined with matched control samples to calculate log ratios. Classifiers were generated and evaluated for 2112 biological questions, resulting in 34 distinct, high-performance "signatures."
2008-03-28 | E-GEOD-8858 | biostudies-arrayexpress
Project description:A metagenomic study to analyze the biodiversity of hydrocarbon degrading organisms and the corresponding genes
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Project description:Phenobarbital is a well studied xenobiotic compound. In this study, we describe the genomic responses in fruit flies and examine whether animals mutant for DHR96, an ortholog of xenobiotic nuclear receptors PXR and CAR, plays a role in mediating xenobiotic responses in Drosophila. Experiment Overall Design: Canton S is a commonly used wild type control strain for xenobiotic studies. Wild type or DHR96 mutant flies were starved overnight and then exposed to either sucrose alone or sucrose supplemented with 0.3% Phenobarbital.
2007-11-11 | E-GEOD-5096 | biostudies-arrayexpress
Project description:We report the transcriptional changes associated with toxic effects of methanolic coal dust extract on normal zebrafish development. Early exposure of wild type embryos at 4 hpf to coal dust extract led to 3 groups of malformed phenotypes - tail deformity (P1), deformed yolk (P2) and smaller embryos with extruded yolks (P3). RNAseq of each phenotypic group revealed changes in genes involved in xenobiotic metabolism, intermediate filament composition, oxidation-reduction processes, calcium ion binding, focal adhesion and the ECM-receptor interaction pathway.
2020-04-01 | GSE128900 | GEO
Project description:Exposomics methods are limited by low abundance of xenobiotic metabolites and lack of authentic standards, which precludes identification using solely mass spectrometry-based criteria. Here, we validate a method for enzymatic generation of xenobiotic metabolites for use with high-resolution mass spectrometry for chemical identification. Generated xenobiotic metabolites were used to confirm identities of respective metabolites in mice and human samples based upon accurate mass, retention time, and co-occurrence with related xenobiotic metabolites. The data shared here are high-resolution Orbitrap MS data for S9 incubations of 140 xenobiotic compounds with 0 and 24 hour time points for all reactions.
2021-02-21 | ST001715 | MetabolomicsWorkbench
Project description:To characterize intestinal myofibroblasts that may contribute to the stromal compartment of the intestinal stem cell niche and identify possible causes of intrinsic xenobiotic resistance
2018-08-23 | GSE114249 | GEO