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Gene expression profiles under oxidative stress conditions in human HaCaT keratinocytes and the derivative cells expressing shRNA against NRF2, MLL1, or UTX.

ABSTRACT: To determine how transcriptome is altered by knockdown of NRF2, MLL1, or UTX, we performed RNA-sequencing (RNA-seq) analysis of HaCaT cells and its shRNA-expressing derivatives before and after exposure to hydrogen peroxide (H2O2) or cerium oxide nanoparticles (CeO2 NPs).

ORGANISM(S): Homo sapiens

PROVIDER: GSE250127 | GEO | 2024/03/27

REPOSITORIES: GEO

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Genomic occupancies of MLL1 and UTX, and H3K4me3/K3K27me3 histone modifications upon hydrogen peroxide treatment in human HaCaT keratinocytes.

Project description:ChIP-seq analysis was conducted to investigate the effects of hydrogen peroxide (H2O2) treatment on the occupancy of MLL1 and UTX, and the associated histone modifications in HaCaT cells.

2024-03-27 | GSE250126 | GEO

RNAseq of human epithelial lung carcinoma cell line A549 exposed to ceria, silver or zinc ions, micron-sized particles or nanoparticles

Project description:The toxicity of silver and zinc oxide nanoparticles is hypothesised to be mediated by dissolved metal ions and cerium dioxide nanoparticles (CeO2 NPs) are hypothesised to induce toxicity specifically by oxidative stress dependant on their surface redox state. To test these hypotheses, RNAseq was applied to characterise the molecular responses of cells to metal nanoparticle and metal ion exposures. The human epithelial lung carcinoma cell line A549 was exposed to different CeO2 NPs with different surface charges, micron-sized and nano-sized silver particles and silver ions, micron-sized and nano-sized zinc oxide particles and zinc ions, or control conditions, for 1 hour, 6 hours and 24 hours. Concentrations were the lower of either EC20 or 128 micrograms/mL. Transcriptional responses were characterised by RNAseq transcriptomics using an Illumina HiSeq2500 .

2018-02-01 | E-MTAB-5734 | biostudies-arrayexpress

Utx interactome in mouse myeloid progenitor cells

Project description:Immunoprecipitation of Utx followed by mass spectrometry analysis to identify Utx binding partners in mouse myeloid progenitor cells.

2018-04-30 | PXD005011 | Pride

RNA-seq of C17.2 neuronal progenitor cells exposed to cerium oxide nanoparticles during cell differentiation

Project description:We used a next-generation sequencing approach to understand the effects of antioxidant cerium oxide nanoparticles (CeO2) on neuronal stem cell differentiation. As a model we used the murine neuronal progenitor cell line, C17.2, which upon differentiation, is able to generate a mixed culture of neurons and neuroglial cells. As additional controls we used N-acetylcysteine (NAC), a conventional antioxidant and samarium doped cerium oxide nanoparticles (Sm-CeO2), as particle controls (as they bear a reduced antioxidant potential as compared to CeO2 alone). We had a time series approach and we investigates effects after 1, 4 and 7 days during differentiation. We revealed that CeO2 reduce axonal guidance signalling, neuronal differentiation and neuroglial differentiation after 7 days, thus having a negative effect on neuronal development. Overall, these effects are likely due to the antioxidant properties of nanoceria, although some evidence for a particle effect was also provided as indicated by the interference with cytoskeletal as well as integrin signaling genes both by nanoceria and Sm-doped nanoceria, but not by NAC.

2017-08-25 | E-MTAB-4398 | biostudies-arrayexpress

Alternative mRNA splicing controls functions of the human H3K27 demethylase UTX/KDM6A

Project description:The UTX/KDM6A gene encodes the UTX histone H3K27 demethylase, which plays an important role in mammalian development and is frequently mutated in cancers and particularly, in urothelial cancers. Using BioID technique, we explored the interactome of different UTX isoforms.

2024-01-28 | PXD041254 | Pride

Differential Genomic Effects of Six Different Nanomaterials on Human Liver HepG2 Cells

Project description:Human Hepatocellular Carcinoma cells (HepG2) were exposed to six nanomaterials containing either Cerium oxide (CeO2) or Titanium oxide (TiO2) nanoparticles. Three different concentrations were tested: 0.3, 3, or 30 μg/mL) for 3 days. Microarray analysis was performed to identify genes differentially expressed following exposure to these chemicals.

2018-08-28 | GSE117056 | GEO

Expression analysis on Mll1+/+ and Mll1-/- MEFs

Project description:Global analysis of H3K4 methylation defines MLL family member targets and points to a role for MLL1-mediated H3K4 methylation in the regulation of transcriptional initiation by RNA polymerase II A common landmark of activated genes is the presence of trimethylation on lysine 4 of histone H3 (H3K4) at promoter regions. The Set1/COMPASS was the founding member and the only H3K4 methylases in S. cerevisiae, however, in mammals at least six H3K4 methylases Set1A/B and MLL1-4 are found in COMPASS-like complexes capable of methylating H3K4. To gain further insight into the different roles and functional targets for the H3K4 methylases, we have undertaken a genome-wide analysis of H3K4 methylation pattern in wild-type Mll1+/+ and Mll1-/- mouse fibroblasts (MEFs). We found that Mll1 is required for the H3K4 trimethylation of less than 5% of promoters carrying this modification. Many of these genes, which include developmental regulators such as Hox genes show decreased levels of RNA polymerase II recruitment and expression concomitant with the loss of H3K4 methylation. Although Mll1 is only required for the methylation of a subset of Hox genes, Menin, a component of the Mll1 and Mll2 complexes, is required for the overwhelming majority of H3K4 methylation at Hox loci. However, the loss of MLL3/4 and/or the Set1 complexes have little to no effect on the Hox loci H3K4 methylation or expression levels in these MEFs. Together these data provide insight into redundancy and specialization of COMPASS-like complexes in mammals and provide evidence on a possible role for Mll1-mediated H3K4 methylation in the regulation of transcriptional initiation. Expression arrays were done with Mll1+/+ and Mll1-/- mouse embryonic fibroblasts. Four replicates were done (dyes were swapped). DNA was hybridized to Agilent Mouse Whole Genome Expression Arrays (4x44k).

2009-10-20 | E-GEOD-18261 | biostudies-arrayexpress

Toxicity Evaluation of Manufactured CeO2 Nanoparticles Before and After Alteration: Combined Physicochemical and Whole-Genome Expression Analysis in Caco-2 Cells.

Project description:We have employed whole genome microarray expression to distinguish the effect of environmental aging on the toxicity of several cerium oxide nanoparticles (NPs) in human intestinal cells compared . Cells were exposed in vitro, and datasets of differentially expressed genes were identified for each type of NPs versus control samples. NPs induced gene expression in Caco-2 cells was measured at 24 hours after exposure . Six independent experiments were performed using different NPs and controls for each experiment.

2014-10-01 | E-GEOD-60128 | biostudies-arrayexpress

Toxicity Evaluation of Manufactured CeO2 Nanoparticles Before and After Alteration: Combined Physicochemical and Whole-Genome Expression Analysis in Caco-2 Cells.

2014-10-01 | GSE60128 | GEO

BEAS2B cells and A549 cells: control versus nanoparticle exposure

Project description:Fragmentary knowledge exists on the adverse health effects of CoO- and CeO2-nanoparticles (NP)s. We analyzed toxicogenomic profiles of BEAS-2B versus A549 cells using genome-wide transcriptomics to identify molecules and cellular processes that are triggered by monodispersed noncytotoxic suspensions of 7-nm CoO- and 4-nm CeO2-NPs for 3, 6, 10, and 24 hours. We aimed to investigate 1) whether a cell type responds similarly to two different NPs exposure, 2) whether alveolar versus bronchial epithelial cells respond differently to the same NP, and 3) whether immune processes are influenced. The kinetics of the cell responses induced by the two NPs were different between the two lung epithelial cell models. Both CoO- and CeO2-NP exposure induced mainly downregulation of gene transcription. BEAS-2B cells were found to be more sensitive towards NP exposure, as they showed a higher total number of differentially expressed transcripts (DET) at a 10-fold lower NP-concentration than A549 cells. Hierarchical clustering of all DET indicated that the transcriptional responses were quite heterogeneous among the two cell types and two NPs. Between 1% and 14% DET encoding markers involved in immune system processes were observed in the BEAS-2B and A549 cell lines, with the highest fractions observed in BEAS-2B cells. Most of these genes, i.e. ITGB2, TLR6, PAG1, HLA-DRB3, TIRAP, and HLA-A, are involved in immune signalling. The AKT1 gene, which showed persistently decreased expression levels, was identified as a possible generic marker of lung epithelial cell-NP interaction. Our data suggest that CoO- and CeO2-NPs give rise to distinct responses.

2014-12-01 | GSE45763 | GEO

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