Ontology highlight
ABSTRACT:
PROVIDER: PRJNA428917 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR6448890.fastq.gz | Fastqsanger.gz | |||
| SRR6448900.fastq.gz | Fastqsanger.gz | |||
| SRR6448910.fastq.gz | Fastqsanger.gz | |||
| SRR6448920.fastq.gz | Fastqsanger.gz | |||
| SRR6448930.fastq.gz | Fastqsanger.gz |
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Project description:Background: Genetic heterogeneity in the innate immune system may account for variable susceptibility to respiratory tract infections (RTIs) in children. Objective: We aimed to assess the impact of polymorphisms rs273259 and rs1333969 in type I interferon related gene IFI44L on susceptibility to RTIs and acute otitis media in children. Methods: In two prospective, population-based birth cohorts, the FinnBrain Birth Cohort Study and the STEPS Study, IFI44L genotypes for rs273259 and rs1333969 were determined in relation to the development of RTIs until one and two years of age, respectively, and adjusted incidence rate ratios (aIRR) or odds ratios (OR) were calculated. At age 3 months, whole blood transcriptional profiles were analyzed and nasal samples were tested for respiratory viruses in a subset of children. Results: In respiratory virus-positive children at 3 months of age, IFI44L gene variants were associated with decreased expression levels of IFI44L and several other interferon related genes. Conclusions: Variant forms of IFI44L gene were protective against early-childhood RTIs or acute otitis media in two independent birth cohorts, and they attenuated interferon pathway activation by respiratory viruses.
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Project description:Recurrent otitis (ROM) is a pathological conditions in which a children have at least three episodes of acute otitis media over a course of 6 months. In this study we focused in proteins dysregulated between ROM and adenotonsillar hypertrophy (ATH). Tissue sample of seven ROM and seven ATH were obtained and submitted to two-dimensional gel electrophoresis (2-DE) and mass spectrometry (MS) for protein identification and western-blotting for data validation. We identified 23 significantly (p<0.05) protein spots. The expression of two proteins were validated by western-blotting. The 2-DE coupled with MS approach identified several proteins involved in cellular and metabolic processes. Further study are needed to better understanding the role of this proteins in ROM.
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Project description:Streptococcus pneumoniae (Spn) is the predominant 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 Spn infection in children after comparison of microarray results with the pre-infection healthy stage of the same children.
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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.
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Project description:Human bocavirus (HBoV) is a newly discovered parvovirus identified from pooled nasopharyngeal aspirate specimens. Human bocavirus 1 (HBoV1) is a respiratory virus observed in respiratory samples from small children presenting bronchiolitis, wheezing, cough, fever, and rhinorrhea. It is the fourth most common virus detected in respiratory infections. DNA of HBoV1 was detected in up to 18% of nasal or nasopharyngeal samples and another study has been shown that over than 85% of children in the United States have antibodies to this virus. HBoV1 is a small DNA virus with a nonenveloped icosahedral capsid. This virus previously has been associated with wheezing, acute otitis media, severe pneumonia and respiratory failure. HBoV 1 has been also detected in the blood of acute respiratory patients and the selected group of immunocompromised children and also determined in healthy blood donors. The role of HBoV1 in the inflammatory process is poorly known. The aim of this project is to clarify the role of HBOV1 in the immunoregulatory mechanisms.
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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