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Project description:RNAseq of nasal cells from volunteers experimentally infected with RSV
| PRJNA700640 | ENA
Project description:We report the analysis of nasal curettage cells by RNAseq collected at pre-symptomatic timepoints in healthy adults experimentally challenged with respiratory syncytial virus (RSV). Following inoculation, 57% of participants developed PCR-confirmed infection. Prior to viral challenge, 80 differentially expressed genes were identified that associated with susceptibility to symptomatic infection. At day 3, 87 differentially expressed genes were associated with protection. Thus, we showed that the nasal mucosa at the time of virus exposure and during the incubation phase correlate with susceptibiltiy and protection from respiratory viral infection.
2020-09-01 | GSE155237 | GEO
Project description:RNAseq of nasal cells from pre-symptomatic volunteers experimentally infected with RSV
| PRJNA649006 | ENA
Project description:The aim of this investigation was two-fold: i) to describe miRNAs involved in the immune response to Respiratory syncytial virus (RSV) in a clinical setting in order to inform further research of immune system regulation by miRNAs in RSV or other infections; ii) to discover differences in miRNA expression between disease severity groups. We have therefore profiled miRNA in cytology brushings of the nasal mucosa in infants with RSV disease, comparing them to healthy infants. miRNA microarray identified 26 differentially regulated miRNA which were subsequently analyzed by RT-qPCR.
2014-10-15 | GSE62306 | GEO
Project description:The objective of this study was to identify gene expression markers of disease severity in a cohort of RSV infected children Respiratory syncytial virus (RSV) is the number one pathogen causing lower respiratory tract infection that leads to hospitalization in young children. Despite growing insights in the disease pathogenesis, the clinical presentation in these children is highly variable and heterogeneous, and reliable markers predictive of disease progression are lacking. We characterized the host response to acute RSV infection to identify biomarkers associated with RSV disease and disease severity. Whole genome transcriptome was analysed early on the disease course in blood samples from otherwise healthy children <2 years of age, who were either hospitalized (n = 110) or evaluated as outpatients (n = 37) due to RSV infection. Age-matched non-RSV-infected healthy children (n = 51) were analysed in parallel. A clustering approach on the transcriptome data revealed biologically meaningful biomarkers associated with progression to severe RSV disease. Overall, the whole blood transcriptome pointed to alterations in frequency of specific immune cell types (neutrophils, T- and B-lymphocytes, NK cells, monocytes) in RSV-infected children. In addition, a cluster enriched for neutrophil degranulation genes, was highly correlated with clinical disease severity. The driver genes of this cluster (OLFM4, ELANE, MMP8, BPI, CEACAM8, LCN2, LTF and MPO) were selected and validated in independent existing transcriptomics datasets. We identified a set of genes involved in neutrophil degranulation as markers for RSV disease severity. Additional prospective studies using these markers are required to further confirm their value as predictive tool in routine clinical care.
2022-01-21 | GSE188427 | GEO
Project description:Human volunteers were experimentally infected with Plasmodium falciparum blood-stage malaria parasites in the context of the VAC063C experimental medicine study (ClinicalTrials.gov NCT03906474). The gene expression profile and T cell receptor alpha and beta chains of CD4 T cells were analysed at single cell resolution at baseline (before malaria infection) and six days after treatment (at the peak of the circulating T cell response). We are comparing the T cell response to the first malaria infection of life (with the highest risk of severe disease) and the third infection where disease tolerance is established. This single cell data is complemented by bulk RNAseq data of flow sorted CD4 T cell subsets (naive, memory and regulatory) available through the GEO SuperSeries GSE172481.
2024-08-20 | GSE275092 | GEO
Project description:In this study, whole blood samples were used to determine the gene expression of healthy adult volunteers experimentally challenged with S. Typhi Quailes strain. Samples were collected at baseline (pre-challenge; Group: CTRL) and 7 days after challenge (Group: sEF) in individuals who did not reach diagnostic criteria. In those reaching the diagnostic endpoint (typhoid fever; Group: EF) the sample on the day of diagnosis when antibiotic treatment commenced was taken. These samples were derived from the placebo arm of a recent a Single Centre, Randomised, Doubleblind, Placebo Controlled Study to Evaluate M01ZH09 in a Healthy Adult Challenge Model, Using Ty21a Vaccine as a Positive Control. Darton et al. PMID: 27533046.
2019-09-02 | GSE112958 | GEO
Project description:This study provides a comprehensive evaluation of changes in gene expression during rhinovirus infections in vivo. Subjects were experimentally infected with HRV-16 rhinovirus (RV16) or sham infected (control). Nasal epithelial scrapings collected and processed for microarray analysis. Only subjects exhibiting rhinovirus infection were analyzed. Experiment Overall Design: Randomized, parallel group study. A total of 31 subjects was analyzed: 15 infected and 16 controls. Nasal scapings were taken 14 days prior to infection (d14) and 8 hours (d0) and 2 days (d2) after infection. For each collection, alternating nostrils were used (e.g. -14d = left, 8hr = right, 2d=left) and subjects were randomized for collection (e.g. LRL, RLR).
2008-06-12 | E-GEOD-11348 | biostudies-arrayexpress
Project description:Rationale: Respiratory syncytial virus (RSV) and Streptococcus pneumoniae are major respiratory pathogens. Co-infection with RSV and S. pneumoniae is associated with severe and often fatal pneumonia but the molecular basis for this remains unclear. Objectives: To determine if interaction between RSV and pneumococci enhances pneumococcal virulence. Methods: We used confocal microscopy and western blot to identify the receptors involved in direct binding of RSV and pneumococci, the effects of which were studied in both in vivo and in vitro models of infection. Human ciliated respiratory epithelial cell cultures were infected with RSV for 72h and then challenged with pneumococci. Pneumococci were collected after 2h exposure and changes in gene expression determined using qRT-PCR. Results: Following incubation with RSV or purified G protein, pneumococci demonstrated a significant increase in the inflammatory response and bacterial adherence to human ciliated epithelial cultures and markedly increased virulence in a pneumonia model in mice. This was associated with extensive changes in the pneumococcal transcriptome and significant upregulation in the expression of key pneumococcal virulence genes, including the gene for the pneumococcal toxin, pneumolysin. We show that mechanistically this is due to RSV G glycoprotein binding penicillin binding protein 1a. Conclusion: The direct interaction between a respiratory virus protein and the pneumococcus resulting in increased bacterial virulence and worsening disease outcome is a new paradigm in respiratory infection. Comparison of the Streptococcus pneumoniae D39 RSV treated compared to BSA Treated in BEBM medium One condition design comparision of two strains including a dye swap
2014-06-21 | E-GEOD-58425 | biostudies-arrayexpress
Project description:This studies describes the transcriptional response in whole blood derived from healthy adult volunteers experimentally infected with S. Paratyphi A. Samples were collected at pre-challenge baseline (Group: CTRL), at day 7 after challenge in those participants who stayed well over 14 days following challenge (Group: suspected Enteric Fever - sEF). Participants who developed signs of enteric fever were sampled at the time of inititiation of antibiotics (Group: EF).In this group diagnosis was confirmed by blood culture positive for S. Paratyphi (SPT). Antibiotic therapy commenced at time of diagnosis or at day 14 after challenge in those who did not develop symptoms. The clinical results of this study have been published in: Dobinson et al. Evaluation of the Clinical and Microbiological Response to Salmonella Paratyphi A Infection in the First Paratyphoid Human Challenge Model. Clin Infect Dis. 2017 Apr 15;64(8):1066-1073.
2019-09-02 | GSE114033 | GEO