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Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Pathways identified by toxicogenomics analysis reveal the size and dose independency of silica particles-induced toxicity in mice.

ABSTRACT: Understanding the interactions of nanostructures with biological systems is essential to nanotoxicological research. Using a microarray-based toxicogenomics approach at early stage, this study investigated the relationship between particle size and toxicity of silica particles (SP) with diameters of 30, 70, and 300 nm (SP30, SP70, and SP300) as well as the mechanism of injury in mice. Two experiments with SiO2 particles of different sizes were considered in mice. One was aimed to investigate the dose-response relationship of SP70 toxicity at a dose of 10, 20, or 40 mg/kg (experiment 1), and the other set to study the size-response relationship of SP-induced toxicity using SP30, SP70, or SP300 (experiment 2). In experiment 2, two dosages each of SP30, SP70, and SP300 were performed. One was 10 mg/kg at three particle sizes, and the other was toxic doses of the three particle sizes, i.e., 10 mg/kg for SP30, 40 mg/kg for SP70, and 200 mg/kg for SP300. The toxic doses of the three particle sizes of SP were decided on the basis of the results of histopathological examinations and serum biochemical analysis in our previous study.n = 5

ORGANISM(S): Mus musculus

SUBMITTER: Xiaoyan Lu

PROVIDER: E-GEOD-30861 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Pathways identified by toxicogenomics analysis reveal the size and dose independency of silica particles-induced toxicity in mice.

Project description:Understanding the interactions of nanostructures with biological systems is essential to nanotoxicological research. Using a microarray-based toxicogenomics approach at early stage, this study investigated the relationship between particle size and toxicity of silica particles (SP) with diameters of 30, 70, and 300 nm (SP30, SP70, and SP300) as well as the mechanism of injury in mice.

2011-08-01 | GSE30861 | GEO

Effect of dietary vitamin B6 on white adipose tissue

Project description:Transcriptional profiling of mouse white adipose tissues The objective of this study is to explore the relationship between vitamin B6 activity and chronic inflammation of white adipose tissue in mice fed a high-fat diet. Twenty-four CD-1 mice were divided into two groups (n = 12) and fed either a 1 mg pyridoxine (PN) HCl /kg diet or a 35 mg PN HCl /kg diet for 8 weeks. We isolated total RNA from epididymal white adipose tissue of each group and compared gene expression profiles by DNA microarray data analysis. Noriyuki Yanaka

2013-01-12 | E-GEOD-43465 | biostudies-arrayexpress

Transcription profiling of mouse small intestine following treatment with dexamethosone and DBZ

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2009-04-10 | E-GEOD-11184 | biostudies-arrayexpress

Quantitative proteomics of liver from methylmercury-exposed Atlantic cod

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Transcription profiling of mouse macrophage response to silica nanoparticles

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2009-01-13 | E-GEOD-13005 | biostudies-arrayexpress

5-Day Gavage Study of Propylene glycol phenyl ether (PPH; CASRN 770-35-4) in Male Harlan Sprague Dawley Rats

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2015-12-31 | E-GEOD-75656 | biostudies-arrayexpress

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Impacts of 2-amino-4,6-dinitrotoluene (2-ADNT) Exposure in Northern Bobwhite

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2016-07-06 | PXD001206 | Pride

Cardiotoxicity of tubulin binders

Project description:The use of tubulin binders (TBs) in oncology indications often is associated with cardiotoxicity, the mechanism of which has not been elucidated. We observed that a single administration of TBs to rats caused an increase in the number of mitotic figures in the myocardial interstitium after 24 hours. We therefore hypothesized that interstitial cells are the primary target of TBs. To test this hypothesis, we evaluated the acute effects of a single intravenous administration of 3 reference TBs, colchicine (0.2 and 2 mg/kg), vinblastine (0.5 and 3 mg/kg), and vincristine (0.1 and 1 mg/kg) 6 and 24 hours after dosing. Mitotic arrest was identified at 24 hours in all high-dose groups based on an increase in the number of mitotic figures in the interstitium coupled with a dramatic decrease in the number of Ki67-positive interstitial cells. Analysis of the myocardial transcriptomic data further supported G2/M cell cycle arrest 6 hours after dosing with the high-dose groups of all 3 compounds. Apoptotic figures and an increase in the number of cleaved caspase 3-positive cells were identified at 6 and 24 hours at the highest dose of each compound almost exclusively in interstitial cells; a few cardiomyocytes were affected as well. Transcriptomic data further suggested that some of the affected interstitial cells were endothelial cells based on the up-regulation of genes typically associated with vascular damage and down-regulation of Endothelial Cell-Specific Molecule 1 and Apelin. Taken together, these data identify endothelial cells of the myocardium as the primary target of the cardiotoxicity of TBs and identify cell cycle arrest as the mechanism of this toxicity. Gene expression was profiled in the myocardium of rats at 6 and 24 hr after a single dose of colchicine, vinblastine or vincristine.

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