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Transcriptomic analysis of splenic CD4+ cells from tBHQ treated

ABSTRACT: We report a transcriptomic analysis from tBHQ (terc-butyl-hydroquinone) treated mice. Mice were treated with this chemical for 20 days using 1.5% mixed in food and allowed water and food ad libitum. After the treatment period, spleen of tBHQ treated and control animals were taken out and CD4+ cells were isolated. Isolated RNA from these cells were subjected to cDNA microarray analysis. Our results show, that tBHQ changes the gene expression of many genes which are involved in metabolic and immune processes. In parallel with transcriptomic analysis, the effect of tBHQ on T cell differentiation was studied. Our results show, that beside changing the gene expression of many genes, tBHQ sensitize effector T cells (Th1, Th2, Th17) and inhibit Treg cells upon stimulation with chemicals.

ORGANISM(S): Mus musculus

PROVIDER: GSE99152 | GEO | 2017/05/23

SECONDARY ACCESSION(S): PRJNA387440

REPOSITORIES: GEO

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Project description:Oxidative stress is an important mechanism of chemical toxicity, contributing to teratogenesis as well as to cardiovascular and neurodegenerative diseases. Developing animals may be especially sensitive to chemicals causing oxidative stress. To assess the response to chemicals at different stages of development, zebrafish (Danio rerio) embryos at 1, 2, 3, 4, 5, and 6 days post-fertilization (dpf) were exposed to 0.1% dimethyl sulfoxide (DMSO), 2 nM 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), or 10 uM tert-butylhydroquinone (tBHQ) for 6 hr. Transcript abundance was assessed by real-time qRT-PCR and microarray (Agilent 22k). By microarray, 1477 probes were significantly different among the DMSO-, tBHQ-, and TCDD-treated embryos at 4 dpf. Of these, 220 were 2-fold or greater up-regulated and 108 were 2-fold or greater down-regulated by tBHQ. For TCDD, 17 probes were 2-fold or greater up-regulated and 6 were 2-fold or greater down-regulated. Genes induced by tBHQ, included genes involved in glutathione synthesis and utilization, signal transduction, and DNA damage / stress response. Keywords: Danio rerio, TCDD, tBHQ, oxidative stress, gene expression Separate groups of 30 embryos generated from TL adults were placed in 15 ml egg water in a 10-cm glass petri and at 1, 2, 3, 4, 5, and 6-dpf were exposed for 6 hr to 0.1% dimethyl sulfoxide (DMSO), 2 nM 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), or 10 uM tert-butylhydroquinone (tBHQ) (4 replicates per compound per time point). Embyros were frozen immediately after the 6 hr exposure and RNA isolated for microarray analysis. A Universal RNA Reference Sample was created by mixing equal amounts of total RNA from 2 replicates each from all toxicants (TCDD, tBHQ, DMSO) and timepoints (1, 2, 3, 4, 5, 6-dpf). Based on qRT-PCR results, the 4 dpf timepoint was selected for microarray analysis, in which the RNA samples (4 replicates per compound) were Cy3 labeled and co-hybridized with Cy5 labeled Universal RNA Reference Sample to generate data for analysis of variance.

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Transcriptomic analysis of splenic CD4+ cells from tBHQ treated

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