Transcriptome profile of peripheral blood mononuclear cells in children with acute otitis media caused by Nontypeable Haemophilus influenzae
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ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE27990 | GEO | 2012/03/15
SECONDARY ACCESSION(S): PRJNA137797
REPOSITORIES: GEO
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Project description:Nontypeable Haemophilus influenzae (NTHi) is a common causative organism of acute otitis media (AOM) in children. A human cDNA microarray comprising 30,968 human genome probes was used to evaluate the transcriptional changes that occur in peripheral blood mononuclear cells (PBMC) at the onset of clinical AOM caused by NTHi infection in children after comparison of microarray results with the pre-infection healthy stage of the same children. Four to ten milliliters of heparinized peripheral venous blood was collected from children at 6 to 30 months of age when they were in acute otitis media (AOM) stage and pre-infection healthy stage. The diagnosis of AOM was based on symptoms and signs as well as Nontypeable Haemophilus influenzae culture positive in the middle ear fluid. Patients with polymicrobial infections, history of immunodeficiency, history of chronic or recurrent AOM, chronic disease, or receiving steroids or other immunomodulatory agents were excluded. Peripheral blood mononuclear cells (PBMCs) were isolated by the Ficoll gradient and total RNA was extracted from PBMCs using the QIAamp RNA blood Mini Kit (Qiagen, Maryland, USA) according to manufacturerM-bM-^@M-^Ys instructions. Double-stranded cDNA generated from total RNA was labeled with Cyanine-5 and subsequently hybridized to Human OneArray glass slides according to the manufacturer's standard protocols (PhalanxBio Inc, CA, USA). Microarrays were scanned at 5 M-NM-<m resolution using an Agilent scanner. Raw intensity signals for each microarray were captured using a Molecular Dynamics Axon 4100A scanner, measured using GenePixProM-bM-^DM-" Software. The data from all microarrays in each experimental set was then analyzed using Omicsoft Array Studio software; control and missing features were removed, and the remaining signals were quantile normalized.
2012-03-15 | E-GEOD-27990 | biostudies-arrayexpress
Project description:Transcriptome analysis of NTHi 86-028NPrpsL, NTHi 86-028NPrpsL∆fur, and NTHi 86-028NPrpsL∆fur(pT-fur) strains Nontypeable Haemophilus influenzae (NTHi) is a commensal microorganism of the normal human nasopharyngeal flora, yet also an opportunistic pathogen of the upper and lower respiratory tracts. Changes in gene expression patterns in response to host microenvironments are likely critical for survival. One such system of gene regulation is the ability to carefully regulate iron uptake. A central regulatory system that controls iron uptake, mediated by the ferric uptake regulator Fur, is present in multiple bacteria, including NTHi. To understand the regulation of iron homeostasis in NTHi, fur was deleted in the NTHi strain 86-028NPrpsL. Using RNA-Seq, we identified both protein-encoding and small RNA genes whose expression was repressed or activated by Fur. Overall design: These data comprise transcriptional anaylses of an rpsL mutant of 86-028NP, an isogenic fur mutant of 86-028NPrpsL and a complemented fur mutant strain. All strains were grown in defined medium containing 10 µg/ml human hemoglobin to mid-log phase. Cells were then harvested and RNA extracted. A total of three biological replicates were generated for these analyses. Analysis of transcriptomes using the Illumina HiSeq 2000 of three strains of nontypeable Haemophilus influenzae which include NTHi 86-028NPrpsL, NTHi 86-028NPrpsL∆fur, and NTHi 86-028NPrpsL∆fur(pT-fur) strains. For each strain three biological replicates were analyzed
2015-07-01 | E-GEOD-58890 | biostudies-arrayexpress
Project description:Nontypeable Haemophilus influenzae (NTHi) is a commensal microorganism of the normal human nasopharyngeal flora, yet also an opportunistic pathogen of the upper and lower respiratory tracts. Changes in gene expression patterns in response to host microenvironments are likely critical for persistence. One such system of gene regulation is the ability to carefully regulate iron uptake. A central regulatory system that controls iron uptake, mediated by the ferric uptake regulator Fur, is present in multiple bacteria, including NTHi. To understand the regulation of iron homeostasis in NTHi, fur was deleted in the prototypic NTHi clinical isolate, 86-028NP. Using an NTHi-specific microarray, we identified genes whose expression was repressed or activated by Fur.
2013-02-05 | GSE39874 | GEO
Project description:Transcriptome analysis of NTHi 86-028NPrpsL, NTHi 86-028NPrpsL∆fur, and NTHi 86-028NPrpsL∆fur(pT-fur) strains Nontypeable Haemophilus influenzae (NTHi) is a commensal microorganism of the normal human nasopharyngeal flora, yet also an opportunistic pathogen of the upper and lower respiratory tracts. Changes in gene expression patterns in response to host microenvironments are likely critical for survival. One such system of gene regulation is the ability to carefully regulate iron uptake. A central regulatory system that controls iron uptake, mediated by the ferric uptake regulator Fur, is present in multiple bacteria, including NTHi. To understand the regulation of iron homeostasis in NTHi, fur was deleted in the NTHi strain 86-028NPrpsL. Using RNA-Seq, we identified both protein-encoding and small RNA genes whose expression was repressed or activated by Fur. Overall design: These data comprise transcriptional anaylses of an rpsL mutant of 86-028NP, an isogenic fur mutant of 86-028NPrpsL and a complemented fur mutant strain. All strains were grown in defined medium containing 10 µg/ml human hemoglobin to mid-log phase. Cells were then harvested and RNA extracted. A total of three biological replicates were generated for these analyses.
2015-07-01 | GSE58890 | GEO
Project description:Nontypeable Haemophilus influenzae (NTHi) is a commensal microorganism of the normal human nasopharyngeal flora, yet also an opportunistic pathogen of the upper and lower respiratory tracts. Changes in gene expression patterns in response to host microenvironments are likely critical for persistence. One such system of gene regulation is the ability to carefully regulate iron uptake. A central regulatory system that controls iron uptake, mediated by the ferric uptake regulator Fur, is present in multiple bacteria, including NTHi. To understand the regulation of iron homeostasis in NTHi, fur was deleted in the prototypic NTHi clinical isolate, 86-028NP. Using an NTHi-specific microarray, we identified genes whose expression was repressed or activated by Fur. These data comprise transcriptional anaylses of a pediatric isolate of NTHi (86-028NP) an rpsL mutant of 86-028NP, a fur mutant of 86-028NP and a fur mutant of 86-028NPrpsL. NTHi parent and fur mutant strains were grown in defined medium containing 10 M-BM-5g /ml human hemoglobin to mid-log phase. Cells were then harvested and RNA extracted. A total of four biological replicates were generated for these analyses.
2013-02-05 | E-GEOD-39874 | biostudies-arrayexpress
Project description:We used an in vitro evolved strain of nontypeable Haemophilus influenzae (NTHI) to examine the metabolic contributions to persistence RNASeq analysis identified 55 transcripts that significantly changed in amount within in vitro biofilms formed by RM33, as compared to the parental strain. Expression of genes encoding all enzymes within the tryptophan and glycogen pathways was significantly increased in biofilms formed by RM33 and the parental strains. In addition, increases were observed in metabolite transport, adhesin production and DNA metabolism, while we observed pyruvate ato have a pivotal role in the metabolic pathways associated with persistence.
2019-09-24 | GSE131505 | GEO
Project description:Hypoxia is a common microenvironmental condition in the mucus-obstructed, infected, and inflamed airways of lung disease patients and is known to influence immune responses in the lungs. However, the effects of hypoxia on lung host defence against respiratory bacterial infections relevant to chronic pulmonary disease are less understood. Nontypeable Haemophilus influenzae (NTHi), an opportunistic respiratory pathogen, frequently colonizes the lower airways of patients with chronic lung diseases and is associated with poor clinical outcomes. Human ex vivo lung explants were infected with a clinical strain of NTHi under normoxic and hypoxic conditions for 24 hours. The host response to infection and the effect of hypoxia were investigated using RNA sequencing.
2024-11-07 | GSE280966 | GEO
Project description:Asthma is the most common chronic respiratory disease. Asthma that cannot be well controlled by steroid treatment is called steroid-resistant asthma. Steroid-resistant asthma accounts for only 5% of all asthma cases, but it accounts for 80% of asthma healthcare costs. Nontypeable Haemophilus influenzae (NTHi), as a Gram-negative bacterium, can release outer membrane vesicles (OMVs) and transfer biomolecules to host cells and the external environment by carrying lipopolysaccharides, proteins, peptidoglycans, outer membrane proteins, cell wall components, proteins, nucleic acids, ion metabolites, and signaling molecules. Thus, it plays a role in obtaining nutrition, stress, toxin delivery, adhesion, host immune surveillance evasion, and host immune response regulation. It becomes an essential way in bacterial pathogenesis. To further clarify whether NTHi OMVs could be inhaled to induce steroid-resistant asthma, we isolated and purified NTHi OMVs. In vivo experiments showed that NTHi OMVs could be inhaled and enter airway epithelial cells. Cosensitization with OVA induces steroid-resistant asthma in mice. Furthermore, through high-throughput sequencing, we found that the NTHi OMVs and OVA co-sensitized mice had significantly enriched inflammatory and immune-related signaling pathways, and the transcription and secretion of IL-1β were increased was the potential cause of SRA.
2023-07-18 | GSE222546 | GEO
Project description:Gene expresison profiles of the R2866 WT and R2866Δ0112 mutant gorwn 7 hours in supplemented brain-heart infusion medium. This experiment was conducted to determine the effects of R2866_0112 gene deletion on overall gene expression profile. The results from this study are further discussed in: Modified lipooligosaccharide structure protects nontypeable Haemophilus influenzae from IgM-mediated complement killing in experimental otitis media. Langereis JD, Stol K, Schweda EK, Twelkmeyer B, Bootsma HJ, de Vries SP, Burghout P, Diavatopoulos DA, Hermans PW. MBio. 2012 Jul 3;3(7):e00079-12. doi: 10.1128/mBio.00079-12. Print 2012.
2013-12-13 | GSE53289 | GEO
Project description:Gene expresison profiles of the R2866 WT and R2866Δ0112 mutant gorwn 4 hours in supplemented brain-heart infusion medium. This experiment was conducted to determine the effects of R2866_0112 gene deletion on overall gene expression profile. The results from this study are further discussed in: Modified lipooligosaccharide structure protects nontypeable Haemophilus influenzae from IgM-mediated complement killing in experimental otitis media. Langereis JD, Stol K, Schweda EK, Twelkmeyer B, Bootsma HJ, de Vries SP, Burghout P, Diavatopoulos DA, Hermans PW. MBio. 2012 Jul 3;3(4):e00079-12. doi: 10.1128/mBio.00079-12. Print 2012.
2013-12-13 | GSE53287 | GEO