Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcription profiling of gastric tissues from mice infected with H. pylori strain SS1 for 6 or 12 months

ABSTRACT: 12 C57BL/6 mice were infected orogastrically with the H. pylori strain SS1. After 6 and 12 months, 3 non-infected and 3 infected mice were sacrificed and stomachs isolated. Gastric tissues were disaggregated and total RNA were isolated by TRIzol extraction and then purified on RNeasy minicolumns. After synthesis of the first cDNA strand (In vitrogen), the double-stranded cDNA was obtained and used to produce biotin-labeled cRNA (Enzo Diagnostic). FRagmented cRNA was hybridized to GeneChip Mouse expression array 430A (Affymetrix).

ORGANISM(S): Mus musculus

SUBMITTER: Eliette Touati

PROVIDER: E-MEXP-1135 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Interferon gamma-signature transcript profiling and IL-23 upregulation in response to Helicobacter pylori infection.

Vivas J R JR Regnault B B Michel V V Bussière F I FI Avé P P Huerre M M Labigne A A D' Elios M M MM Touati E E

International journal of immunopathology and pharmacology 20080701 3

Helicobacter pylori infection is the major cause of gastroduodenal pathologies including gastric cancer. The long persistence of bacteria and the type of immune and inflammatory response determine the clinical issue. In this study, the global gene expression profile after 6 and 12 months of H. pylori infection was investigated in the mouse stomach, using the Affymetrix GeneChip Mouse Expression Array A430. Genes related to the inflammatory and immune responses were focused. Levels of selected tr ...[more]

PMID: 18831919

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Project description:Influenza A virus (IAV) predisposes individuals to secondary infections with the bacterium Streptococcus pneumoniae (the pneumococcus). Infections may manifest as pneumonia, sepsis, meningitis or otitis media (OM). It remains controversial as to whether secondary pneumococcal disease is due to the induction of an aberrant immune response or IAV induced immunosuppression. Moreover, as the majority of studies have been performed in the context of pneumococcal pneumonia, it remains unclear how far these findings can be extrapolated to other pneumococcal disease phenotypes. Here, we demonstrate that the viral hemagglutinin (HA) mediates bacterial OM by inducing a pro-inflammatory response in the middle ear cavity in a replication-dependent manner. Importantly, our findings show that it is the inflammatory response that mediates pneumococcal replication; not viral suppression of the immune system or epithelial damage. This study provide the first evidence that HA induced inflammation drives pneumococcal replication in the middle ear cavity, which has important consequences to the treatment of pneumococcal OM. Five-day old C57BL/6 mice were colonised intranasally (i.n.) with 2M-CM-^W103 colony forming units (CFU) of S. pneumoniae EF3030Lux in 3 M-BM-5Ls of PBS. Alternatively, mice were mock-infected with an equivalent volume of phosphate buffered saline (PBS). At 14-days of age, infant mice were infected i.n. with 20 plaque forming units (PFU) (PR8/34, Cambridge/34 and WSN/33) or 102.5 PFU (all other virus strains) of egg-grown IAV in 3 M-BM-5Ls of PBS. Viral doses were selected to ensure a reproducible infection with minimum morbidity and no mortality. Six days post-IAV infection, mice were euthanised and organs were collected for analysis. Six independent biological replicates (where both ears from one mouse were pooled to create one sample) were used for each condition and analyzed using the NimbleGen platform (12M-CM-^W135K Mouse Gene Expression Arrays, Roche Nimblegen, USA). Indirect labeling, hybridization and washing was performed according to the manufacturerM-bM-^@M-^Ys instructions. Array images were acquired with a NimbleGen MS200 scanner, and images were processed with NimbleScan software using the RMA algorithm. Data was processed using Arraystar (DNASTAR, USA) with default settings as described in the manual. Differential expression tests were performed with a moderated T-test implemented in Arraystar, followed by FDR correction of the P values (Q-values) according to the method of Storey and Tibshirani

Dataset Information

Transcription profiling of gastric tissues from mice infected with H. pylori strain SS1 for 6 or 12 months

Publications

Interferon gamma-signature transcript profiling and IL-23 upregulation in response to Helicobacter pylori infection.

Similar Datasets

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