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Expression data from 6-month Helicobacter felis-infected WT and Gli1-/- mouse stomachs

ABSTRACT: Gli1 is necessary for the progression from chronic gastric inflammation to metaplasia in the stomach. We therefore compared the expression patterns between 6-month H. felis infected WT and Gli1-/- stomachs.

ORGANISM(S): Mus musculus

PROVIDER: GSE43693 | GEO | 2013/01/24

SECONDARY ACCESSION(S): PRJNA187065

REPOSITORIES: GEO

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Expression data from 6-month Helicobacter felis-infected WT and Gli1-/- mouse stomachs

Project description:Gli1 is necessary for the progression from chronic gastric inflammation to metaplasia in the stomach. We therefore compared the expression patterns between 6-month H. felis infected WT and Gli1-/- stomachs. Pooled tissue from the gastric fundi of 3 mice per group. Groups are WT, WT + H. felis (6 months), Gli1-/-, and Gli1-/- +H. felis (6 months). All the infected and control mice were obtained from the same experiment.

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Expression patterns of total stomach cells in 6-month H. felis-infected versus uninfected mice.

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Project description:We are now trying to elucidate the mechanism of Helicobacter-induced gastritis and gastric cancer. To identify genes involved in these Helicobacter-associated diseases, we infected Helicobacter felis to INS-GAS (insulin-gastrin transgenic) mice (C57BL/6 background) which shows accelerated development of gastritis and gastric cancer. Three infected mice and three uninfected control mice (6 in total) were sacrificed periodically (2, 4, 6, 8 months after the infection), and total RNA was isolated from each stomach. These samples are subjected to gene microarray analysis. Samples were obtained from mouse stomachs at 2, 4, 6, and 8/9 month post infection intervals. Control time points were taken at 0, 2, 4, 6, and 8 months. All samples, 22 in total, were hybridized to the GLYCOv2 array.

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Transcription profiling of mouse model of Helicobacter-induced gastric cancer

Project description:We have previously reported human gastrin overexpressing transgenic mice (=INS-GAS mice) and Helicobacter felis (=H.felis) infection synergistically accelerated gastric cancer in mice stomachs. (Wang et al 2000) Using this mouse model, we employed microarray analysis of gene expression profiling to identify gastric cancer-specific genes. Experiment Overall Design: 30 male INS-GAS mice (FVB/N background) were divided into groups: 15 mice were infected with H.felis at the age of 2-3 months and another 15 mice were not infected. 30 male non-transgenic FVB/N mice were also divided into 2 groups: 15 mice were infected with H.felis at the age of 2-3 months and another 15 mice were not infected. All mice were sacrificed after 6 months of H.felis infection, and total RNAs were extracted from whole stomachs. Experiment Overall Design: Histological analysis confirmed all of the stomachs in H.felis infected INS-GAS mice (=INSGAS+Hf) had intra-epithelial gastric cancer, and some of them also had invasion into submucosa, but none of them had distant metastatic lesions. Other 3 control groups had following histology in stomachs. (1) non-transgenic mice with H.felis infection (=FVB+Hf): severe intestinal metaplasia and/or mild dysplasia. (2) INS-GAS mice without infection (=INSGAS wt): severe atrophic gastritis and/or mild intestinal metaplasia (3) non-transgenic mice without infection (=FVB wt): normal stomach. Total RNAs extracted from each mouse in 4 different groups were used for microarray analysis of Affymetrix GeneChip. Experiment Overall Design: Up- or down-regulated genes in INSGAS+Hf group compared with all 3 control groups (FVB+HF, INSGAS wt and FVB wt) may represent gastric cancer-specific genes.

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gene expression profiling of mouse model of Helicobacter-induced gastric cancer

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Changes in gene expression during the transition from inflammation to cancer following Helicobacter felis infection

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Helicobacter felis ATCC 49179

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Mus musculus