Genotyped_bacterial_meningitis
Ontology highlight
ABSTRACT:
PROVIDER: EGAD00010002328 | EGA |
REPOSITORIES: EGA
Publications
Joint sequencing of human and pathogen genomes reveals the genetics of pneumococcal meningitis.
Lees John A JA Ferwerda Bart B Kremer Philip H C PHC Wheeler Nicole E NE Serón Mercedes Valls MV Croucher Nicholas J NJ Gladstone Rebecca A RA Bootsma Hester J HJ Rots Nynke Y NY Wijmega-Monsuur Alienke J AJ Sanders Elisabeth A M EAM Trzciński Krzysztof K Wyllie Anne L AL Zwinderman Aeilko H AH van den Berg Leonard H LH van Rheenen Wouter W Veldink Jan H JH Harboe Zitta B ZB Lundbo Lene F LF de Groot Lisette C P G M LCPGM van Schoor Natasja M NM van der Velde Nathalie N Ängquist Lars H LH Sørensen Thorkild I A TIA Nohr Ellen A EA Mentzer Alexander J AJ Mills Tara C TC Knight Julian C JC du Plessis Mignon M Nzenze Susan S Weiser Jeffrey N JN Parkhill Julian J Madhi Shabir S Benfield Thomas T von Gottberg Anne A van der Ende Arie A Brouwer Matthijs C MC Barrett Jeffrey C JC Bentley Stephen D SD van de Beek Diederik D
Nature communications 20190515 1
Streptococcus pneumoniae is a common nasopharyngeal colonizer, but can also cause life-threatening invasive diseases such as empyema, bacteremia and meningitis. Genetic variation of host and pathogen is known to play a role in invasive pneumococcal disease, though to what extent is unknown. In a genome-wide association study of human and pathogen we show that human variation explains almost half of variation in susceptibility to pneumococcal meningitis and one-third of variation in severity, ide ...[more]
Similar Datasets
Project description:This study includes 1146 samples of host genotyping data (imputed) from Illumina Omni arrays, using https://imputation.sanger.ac.uk/ with the Haplotype Reference Consortium v1.1. Samples were collected from adults (>16 yrs) patients with CSF confirmed bacterial meningitis in the Netherlands between 2006 and 2015. Metadata includes patient outcome, species of bacteria, and for 467 samples a link to an ENA run with the associated bacterial genome (S. pneumoniae only).
| EGAD00010002327 | EGA
Project description:Streptococcus pneumoniae is a common nasopharyngeal colonizer, but can also cause life-threatening invasive diseases such as empyema, bacteremia and meningitis. Genetic variation of host and pathogen is known to play a role in invasive pneumococcal disease, though to what extent is unknown.
This study includes 1146 samples of host genotyping data (genotyped and imputed) from Illumina Omni arrays. Samples were collected from adults (>16 yrs) patients with CSF confirmed bacterial meningitis in the Netherlands between 2006 and 2015. Metadata includes patient outcome, species of bacteria, and for 467 samples a link to an ENA run with the associated bacterial genome (S. pneumoniae only).
| EGAS00001005993 | EGA
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Project description:This study investigates the global transcriptional response of Streptococcus pneumoniae D39V (serotype 2 strain) to human blood components and CSF acquired from discarded and anonymized patient samples.
2022-11-28 | GSE214359 | GEO
Project description:Epithelial cells are the first point of contact for bacteria entering the respiratory tract. Streptococcus pneumoniae is an obligatory human pathobiont of the nasal mucosa, carried asymptomatically but also the cause of severe pneumoniae. The role of the epithelium in maintaining homeostatic interactions or mounting an inflammatory response to invasive S. pneumoniae is currently poorly understood. However, studies have shown that chromatin modifications, at the histone level, induced by bacterial pathogens interfere with the host transcriptional program and promote infection. In this study, we demonstrate that S. pneumoniae actively induces di-methylation of histone H3 on lysine 4 (H3K4me2), which persists for at least 9 days upon clearance of bacteria with antibiotics. We show that infection establishes a unique epigenetic program affecting the transcriptional response of epithelial cells, rendering them more permissive upon secondary infection. Our results establish H3K4me2 as a unique modification induced by infection, distinct from H3K4me3, which localizes to enhancer regions genome-wide. Therefore, this study reveals evidence that bacterial infection leaves a memory in epithelial cells after bacterial clearance, in an epigenomic mark, thereby altering cellular responses for subsequent infections.
2024-05-17 | GSE230141 | GEO
Project description:Streptococcus pneumoniae is the dominant cause of community-acquired pneumonia world-wide. Invasion of the pleural space is common and results in increased mortality. We set out to determine the bacterial and host factors that influence invasion of the pleural space. In a murine model of pneumococcal infection, we isolated neutrophil-dominated samples of bronchoalveolar and pleural fluid containing bacteria 48 hours after infection. Using dual RNA-seq, we characterised bacterial and host transcripts that were differentially regulated between these compartments and bacteria in broth and resting neutrophils respectively. Pleural and lung samples showed upregulation of genes involved in positive regulation of neutrophil extravasation but down-regulation of genes mediating bacterial killing. Compared to the lung samples, cells within the pleural space showed marked upregulation of many genes induced by type I interferons, cytokines implicated in preventing bacterial transmigration across epithelial barriers. Differences in the bacterial transcripts between the infected samples and bacteria grown in broth showed upregulation of genes in the bacteriocin locus, the pneumococcal surface adhesin PsaA, and the glycopeptide resistance gene, vanZ; the gene encoding the ClpP protease was downregulated in infection. 169 intergenic putative small bacterial RNAs were also identified, of which 43 (25.4%) had been previously described. 42 of the small RNAs were upregulated in pleura compared to broth, including many previously identified as important in virulence. Our results have identified key host and bacterial responses to invasion of the pleural space that can be potentially exploited to develop alternative antimicrobial strategies for prevention and treatment of pneumococcal pleural disease.
2019-07-11 | GSE134118 | GEO
Project description:Epithelial cells are the first point of contact for bacteria entering the respiratory tract. Streptococcus pneumoniae is an obligatory human pathobiont of the nasal mucosa, carried asymptomatically but also the cause of severe pneumoniae. The role of the epithelium in maintaining homeostatic interactions or mounting an inflammatory response to invasive S. pneumoniae is currently poorly understood. However, studies have shown that chromatin modifications, at the histone level, induced by bacterial pathogens interfere with the host transcriptional program and promote infection. In this study, we demonstrate that S. pneumoniae actively induces di-methylation of histone H3 on lysine 4 (H3K4me2), which persists for at least 9 days upon clearance of bacteria with antibiotics. We show that infection establishes a unique epigenetic program affecting the transcriptional response of epithelial cells, rendering them more permissive upon secondary infection. Our results establish H3K4me2 as a unique modification induced by infection, distinct from H3K4me3, which localizes to enhancer regions genome-wide. Therefore, this study reveals evidence that bacterial infection leaves a memory in epithelial cells after bacterial clearance, in an epigenomic mark, thereby altering cellular responses for subsequent infections. Transcriptome analysis aimed at testing whether cells respond differently in the primary (1°) and secondary (2°) infection. Differential gene expression and gene set enrichment analysis performed.
2024-05-17 | GSE230138 | GEO
Project description:Background Mortality from bacterial meningitis, predominately caused by Streptococcus pneumoniae, exceeds 50% in low and middle income countries in sub-Saharan Africa with high HIV prevalence. Underlying causes of high mortality are poorly understood. We examined the host and pathogen proteome in adults with proven pneumococcal meningitis (PM), testing if differentially expressed proteins in CSF were implicated in outcome. Materials/methods CSF proteomes were analysed by quantitative Mass-Spectrometry. Spectra were identified using the Swissprot human and TIGR4 pneumococcal protein libraries. Proteins were quantitated and analysed against clinical outcome. Unique proteins in PM were identified against published normal CSF proteome. Random-Forest models were used to test for protein signatures discriminating outcome. Proteins of interest were tested for their effects on growth and opsonophagocytic killing of S. pneumoniae. Results CSF proteomes were available for 57 Adults with PM (median age 32 years, 60% male, 70% HIV-1 co-infected, mortality 63%). 360 individual human and 23 pneumococcal proteins were identified. Of the human protein hits, 30% were not expressed in normal CSF, and these were strongly associated with inflammation and primarily related to neutrophil activity. No human protein signature predicted outcome. However, expression of the essential S. pneumoniae protein Elongation Factor Tu (EF-Tu) was significantly increased in CSF of non-survivors (False Discovery Rate (q) <0.001). Expression of EF-Tu was negatively co-correlated against expression of Neutrophil defensin (r 0.4 p p<0.002), but not against complement proteins C3 or Factor H. In vitro, addition of EF-Tu protein impaired S. pneumoniae neutrophil killing when osponised with CSF. Conclusions Excessive CSF levels of S. pneumoniae EF-Tu protein was associated with reduced survival in human meningitis. Preliminary studies show EF-Tu inhibits neutrophil mediated killing of S. pneumoniae in CSF. Further functional studies are required to better understand the mechanistic role of EF-Tu during PM.
2020-11-09 | PXD021268 | Pride
Project description:Background: Meningitis can be caused by several viruses and bacteria. Identifying the causative pathogen as quickly as possible is crucial to initiate the most optimal therapy, as acute bacterial meningitis is associated with a significant morbidity and mortality. Bacterial meningitis requires antibiotics, as opposed to enteroviral meningitis, which only requires supportive therapy. Clinical presentation is usually not sufficient to differentiate between viral and bacterial meningitis, thereby necessitating cerebrospinal fluid (CSF) analysis by PCR and/or time-consuming bacterial cultures. However, collecting CSF in children is not always feasible and a rather invasive procedure. Methods: In 12 Belgian hospitals, we obtained acute blood samples from children with signs of meningitis (49 viral and 7 bacterial cases). (aged between 3 months and 16 years). After pathogen confirmation on CSF, the patient was asked to give a convalescent sample after recovery. 3’mRNA sequencing was performed to determine differentially expressed genes (DEGs) to create a host transcriptomic profile. Results: Enteroviral meningitis cases displayed the largest upregulated fold change enrichment in type I interferon production, response and signaling pathways. Patients with bacterial meningitis showed a significant upregulation of genes related to macrophage and neutrophil activation. We found several significantly DEGs between enteroviral and bacterial meningitis. Random forest classification showed that we were able to differentiate enteroviral from bacterial meningitis with an AUC of 0.982 on held-out samples. Conclusions: Enteroviral meningitis has an innate immunity signature with type 1 interferons as key players. Our classifier, based on blood host transcriptomic profiles of different meningitis cases, is a possible strong alternative for diagnosing enteroviral meningitis.
2019-06-27 | GSE133378 | GEO
Project description:Bacteria were grown in BHI until OD600 1.0 (late exponential phase) and RNA stabilized using the RNAprotectTM bacteria reagent (QIAGEN) according to the manufacturer recommendations. For each strain, RNA extraction has been carried out on three independent biological samples. Briefly, bacterial total RNA was isolated, reverse transcribed, hybridised to whole genome microarray and microarray data was analysed as described previously (Chatterjee, 2006). Hybridizations were performed with cDNAs from EGD-e versus the over-expressing strain (EGD-e+pPXrnhB).
2008-06-29 | E-MEXP-1162 | biostudies-arrayexpress