Project description:This SuperSeries is composed of the following subset Series: GSE36170: Pulmonary miRNA expression in C57BL/6 Bom Tac mice (dams) intratracheally instilled with Printex 90 carbon black nanoparticles GSE36171: Pulmonary miRNA expression in C57BL/6 non-pregnant female mice intratracheally instilled with Printex 90 carbon black nanoparticles Refer to individual Series
Project description:While investigation of a single inhaled toxicant may be useful, the additive effects of toxicants interacting within the body can only be modelled through co-exposure. The purpose of this study is to understand how inhalation of carbon black and ozone alters the transcriptome, and if co-exposure incites unique, genome-wide changes in the lungs.
Project description:The aim of this study was to investigate the effects of administration of carbon black nanoparticle (CB-NP) to pregnant mice on the development of lymphoid tissues in infantile mice. Pregnant ICR mice were treated with a suspension of CB-NP 95 microg/kg/time) by intranasal instillation, twice, on gestational day 5 and 9. Spleen and thymus were collected from offspring mice at 5 days post-partum. RNA sample was taken from spleen of 5-day-old mouse prenatally received carbon black nanoparticle, while control RNA was taken from control counterpart prenatally received distilled water. Comparisons among groups were made by one-color method with normalized data from Cy3 channels for data analysis.
Project description:To identify differentially expressed genes and key biological pathways that define toxicity following nanomaterial exposure, we performed microarray analyses on NR8383 macrophages exposed for 4 h to 0.9 cm²/cm² of carbon black (Printex 90). This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement N°. 686098
Project description:The aim of this study was to investigate the effects of administration of carbon black nanoparticle (CB-NP) to pregnant mice on the development of lymphoid tissues in infantile mice. Pregnant ICR mice were treated with a suspension of CB-NP 95 microg/kg/time) by intranasal instillation, twice, on gestational day 5 and 9. Spleen and thymus were collected from offspring mice at 5 days post-partum.
Project description:We investigated hepatic mRNA profiles of female mice exposed to 0.162 mg Printex 90 carbon black nanoparticles by single intra-tracheal instillation. We examined responses to this dose 1, 3 and 28 days after exposure, alongside respective controls. We show that genes part of the 3-hydroxy-3-methyl-glutaryl-CoA reductase pathway to be up-regulated by exposure to Printex 90.
Project description:Anthropogenic activities have dramatically increased the inputs of reactive nitrogen (N) into terrestrial ecosystems, with potentially important effects on the soil microbial community and consequently soil C and N dynamics. Our analysis of microbial communities in soils subjected to 14 years of 7 g N m-2 year-1 Ca(NO3)2 amendment in a Californian grassland showed that the taxonomic composition of bacterial communities, examined by 16S rRNA gene amplicon sequencing, was significantly altered by nitrate amendment, supporting the hypothesis that N amendment- induced increased nutrient availability, yielded more fast-growing bacterial taxa while reduced slow-growing bacterial taxa. Nitrate amendment significantly increased genes associated with labile C degradation (e.g. amyA and xylA) but had no effect or decreased the relative abundances of genes associated with degradation of more recalcitrant C (e.g. mannanase and chitinase), as shown by data from GeoChip targeting a wide variety of functional genes. The abundances of most N cycling genes remained unchanged or decreased except for increases in both the nifH gene (associated with N fixation), and the amoA gene (associated with nitrification) concurrent with increases of ammonia-oxidizing bacteria. Based on those observations, we propose a conceptual model to illustrate how changes of functional microbial communities may correspond to soil C and N accumulation.
Project description:We investigated pulmonary mRNA profiles of female mice exposed to 0.018, 0.054 and 0.162 mg Printex 90 carbon black nanoparticles by single intra-tracheal instillation. We examined responses to these doses 1, 3 and 28 days after exposure, alongside respective controls. This study demonstrates widespread changes in inflammatory and acute phase response genes that persisted to 28 days at the highest exposure dose. Changes relevant to sterol and terpenoid biosynthetic pathways were also observed.
Project description:C57BL/6 mice were exposed to vehicle or 0.162 mg carbon black nanoparticles by intratracheal installation and were sacrificed 1, 3 and 28 days post-exposure. Gene expression was investigated in two sets of mice treated according to the identical exposure protocol. MicroRNAs were investigated in the second set of mice.
