Ontology highlight
ABSTRACT:
PROVIDER: PRJNA1047310 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR27129339_1.fastq.gz | Fastqsanger.gz | |||
| SRR27129339_2.fastq.gz | Fastqsanger.gz | |||
| SRR27129340_1.fastq.gz | Fastqsanger.gz | |||
| SRR27129340_2.fastq.gz | Fastqsanger.gz | |||
| SRR27129341_1.fastq.gz | Fastqsanger.gz |
Items per page: 5 1 - 5 of 10 |
Similar Datasets
Project description:Helicobacter pylori strains USU101 was infected into macaques, some of which were treated with the dietary carcinogen ENNG. After 5 years, H. pylori isolates were obtained by endoscopy followed by culture. The resulting strains were analyzed for differences in gene content by array CGH.
2014-08-18 | GSE60405 | GEO
Project description:Array CGH analysis of Helicobacter pylori strains isolated from a North American cohort of symptomatic pediatric patients. Keywords: genotyping_design
2009-11-05 | GSE13317 | GEO
Project description:In this study, a whole-genome CombiMatrix Custom oligonucleotide tiling microarray with 90000 probes covering six sequenced Helicobacter pylori(H. pylori) genomes was designed and utilized for comparative genomic profiling of eight unsequenced strains isolated from patients with different gastroduodenal diseases in Heilongjiang province of China. Since significant genomic variation were found among these strains, an additional 76 H. pylori stains with different clinical outcomes isolated from various provinces of China were further tested by PCR to demonstrate this distinction. We observed several highly variable regions among strains of gastritis, gastric ulceration and gastric cancer. They are involved in genes associated with bacterial type I, type II and type III R-M system as well as in a virB gene neighboring the well studied cag pathogenic island. Previous studies have reported the diverse genetic characterization of this pathogenic island, but it is conserved in the strains tested by microarray in this study. Moreover, a number of genes involved in the type IV secretion system related to DNA horizontal transfer between H. pylori strains were identified based on the comparative analysis of the strain specific genes. These findings may provide new insights for discovering biomarkers for prediction of gastric diseases.
2013-11-10 | GSE32107 | GEO
Project description:Forkhead box (Fox) proteins constitute an evolutionarily conserved family of transcriptional regulators whose deregulations lead to tumorigenesis. However, their regulation and function in gastric cancer are unknown. Promoter hypermethylation occurs during Helicobacter pylori (H pylori)-induced gastritis, but whether the deregulated genes contribute to the multi-step gastric carcinogenesis remains unclear. FOXD3 was found to be hypermethylated in a mouse model of H pylori infection and possess tumor-suppressive functions in gastric cancer cell lines. In order to characterize the direct targets of FOXD3 that confer its actions, we performed ChIP-chip in N87 gastric cancer cell line which express low level of FOXD3 in the nuclei of a sub-population of cells. Promoter hypermethylation occurs during Helicobacter pylori (H pylori)-induced gastritis, but whether the deregulated genes contribute to the multi-step gastric carcinogenesis remains unclear. We used MethylCap-microarray to identify hypermethylated genes in a mouse model of H pylori infection.
2012-12-28 | GSE39490 | GEO
Project description:Helicobacter pylori colonizes the stomach of half of the world's population, causing a wide spectrum of disease ranging from asymptomatic gastritis to ulcers to gastric cancer. Although the basis for these diverse clinical outcomes is not understood, more severe disease is associated with strains harboring a pathogenicity island. To characterize the genetic diversity of more and less virulent strains, we examined the genomic content of 15 H. pylori clinical isolates by using a whole genome H. pylori DNA microarray. We found that a full 22% of H. pylori genes are dispensable in one or more strains, thus defining a minimal functional core of 1281 H. pylori genes. While the core genes encode most metabolic and cellular processes, the strain-specific genes include genes unique to H. pylori, restriction modification genes, transposases, and genes encoding cell surface proteins, which may aid the bacteria under specific circumstances during their long-term infection of genetically diverse hosts. We observed distinct patterns of the strain-specific gene distribution along the chromosome, which may result from different mechanisms of gene acquisition and loss. Among the strain-specific genes, we have found a class of candidate virulence genes identified by their coinheritance with the pathogenicity island. Keywords: other
2001-07-25 | GSE6 | GEO
Project description:KDM4B, an important epigenetic regulator of cell proliferation, metastasis and genome stability, is often overexpressed in gastric cancer. Notably, elevated expression of KDM4B is associated with a poor clinical outcome. A global transcriptomic analysis between KDM4B control and KDM4B-knockdown AGS cells without or with Helicobacter pylori challenge reveals differentially expressed genes involved in response to virus, multi-organism process, and response to stimulus, suggesting KDM4B as an inducible epigenetic factor under H. pylori challenge.
2019-02-05 | GSE107703 | GEO
Project description:Helicobacter pylori genome is rich in restriction - modification (R-M) systems. Around 4 % of the genome codes for components of R-M systems. hpyAVIBM, which codes for a putative phase-variable C5 - cytosine methyltransferase (MTase) from H. pylori lacks a cognate restriction enzyme. To analysis the effect of deleting hpyAVIBM on the Helicobacter pylori transcriptome, microarray analysis was done with the wild type strains and corresponding hpyAVIBM deletion strains
2011-03-16 | E-GEOD-27946 | biostudies-arrayexpress
Project description:The monkey infecting Helicobacter pylori strain USU101 used in a long term infection of macaques with and without the dietary carcinogen ENNG was analyzed for gene content compared to the sequenced strains 26695 and J99
2014-08-18 | GSE60404 | GEO
Project description:<p>The metabolism of bacteria is closely associated with antibiotic resistance, yet the role of metabolism in the resistance of Helicobacter pylori remains unclear. In this study, we conducted integrated analysis using transcriptomics and non-targeted metabolomics to investigate the metabolic changes of antibiotic-treated H. pylori. The results revealed an upregulation in the expression of genes related to fatty acid biosynthesis. Inhibiting fatty acid biosynthesis significantly enhanced the sensitivity of H. pylori strains sensitive to antibiotics, artificially selected multidrug-resistant strains, and clinically multidrug-resistant strains, leading to the inability to form intact biofilms. Furthermore, we explored the reasons for the enhanced fatty acid synthesis in H. pylori under antibiotic pressure and found that antibiotic treatment induced a stringent response in H. pylori, activating the regulation of the downstream operon containing hp0560 by σ28, thereby enhancing the fatty acid synthesis pathway and consequently increasing H. pylori's tolerance to various antibiotics. In this study, we identified a novel mechanism by which H. pylori adapts to antibiotic pressure.</p>
2024-06-26 | MTBLS9981 | MetaboLights