Unknown,Transcriptomics,Genomics,Proteomics

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Gene analysis of flagellin-treated nasal mucosa of Duox2-/- mice

ABSTRACT: To evaluate the roles of DUOX2 in flagellin- induced inflammatory response in mouse nasal mucosa. Wild type (Duox2+/+) and Duox2 knockout (Duox2-/-) mice were stimulated with 1 M-NM- 2 fold) were up-regulated in nasal mucosa of Duox2+/+ that was treated with flagellin and the full list of genes is presented in Supplemental Table II. These genes included the following defense- and immune response-related genes : Cytokine/chemokine-related genes (CCL20, CCR2, CCR5, CXCL2, CXCL5, CXCL9, CXCL16, IL18RAP, TNFAIP2, IL1B EAR2, FPR1), Granulocyte-related genes (IL8RB, MPO, PRG2, PPBP, PRG3), interferon-related genes (IFITM6, IFI47), macrophage related genes (IL1B, S100A9), and T-cell mediated immune response related genes (H2-Q6, IL1F9). In addition, signal transduction (PPBP, OLFR60, P2RY10) and cell adhesion (SELL, SELP, ICAM1, DSG1A, DSG3, VCAM1) related genes were also increased by flagellin treatment. These genes were selected based on the biological processes and molecular functions of their gene ontology. However, the increase of inflammation and immune response related genes by flagellin treatment were diminished in the nasal mucosa of the Duox2-/- mice compared with that of Duox2+/+ mice. Wild type (Duox2+/+) and Duox2 knockout (Duox2-/-) mice received either PBS (control) or flagellin (5 ug/ml) intranasally for 4h.

ORGANISM(S): Mus musculus

SUBMITTER: JUNGHEE JOO

PROVIDER: E-GEOD-26135 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:41 volunteers (male non-smokers) were exposed to formaldehyde (FA) vapors for 4 h per day over a period of 5 working days under strictly controlled conditions. For each exposure day, different exposure concentrations were used in a random order ranging from 0 up to 0.7 ppm. At concentrations of 0.3 ppm and 0.4 ppm, four peaks of 0.6 or 0.8 ppm for 15 min each were applied. During exposure, subjects had to perform bicycle exercises (about 80 W) four times for 15 min. Blood samples, exfoliated nasal mucosa cells and nasal biopsies were taken before the first and after the last exposure. Nasal epithelial cells were additionally sampled 1, 2 and 3 weeks after the end of the exposure period. The alkaline comet assay, the sister chromatid exchange (SCE) test and the cytokinesis-block micronucleus test (CBMNT) were performed with blood samples. The micronucleus test (MNT) was also performed with exfoliated nasal mucosa cells. The expression (mRNA level) of the GSH-dependent formaldehyde dehydrogenase (FDH, identical to alcohol dehydrogenase 5; ADH5; EC 1.2.1.46) was measured in blood samples by quantitative real-time RT-PCR with TaqMan probes. DNA microarray analyses using a full-genome human microarray were performed on blood samples and nasal biopsies of selected subgroups with the highest FA exposure at different days. None of the tests performed showed a biologically significant effect related to FA exposure. Under the experimental conditions of this study, inhalation of FA did not lead to genotoxic effects in peripheral blood cells and nasal mucosa and had no effect on the expression of the FDH gene. Inhalation of FA also did not cause biologically relevant alterations in the expression of genes in a microarray analysis with nasal biopsies and peripheral blood cells. Gene expression analysis of nasal biopsies and blood samples before and after inhalation of 0.7ppm formaldehyde (0 h, 24 h, or 72 h before sampling), and of blood cells before and after exposure to 200µM formaldehyde for 4 hours.

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Gene analysis of flagellin-treated nasal mucosa of Duox2-/- mice

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