Homo sapiens
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ABSTRACT:
PROVIDER: PRJNA125609 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Expression data from Gambian children with and without the clinical signs of active trachoma: HG-focus array
| PRJNA125597 | ENA
Project description:Conjunctival samples from 60 individuals with and without the clinical signs of active trachoma were analysed on the U133 Plus 2.0 arrays. Global transcriptional changes characteristic of disease and infection phenotypes were identified. Two analysis methods found large numbers of differentially regulated genes and the existence of networks of co-expressed genes. There were signatures characteristic of the host defence response with evidence supporting infiltration of various types of leukocytes and activation of innate responses of epithelial cells. Two separate methods could classify disease and infection phenotype based on transcription signatures with 70% accuracy. These results provide an insight into the complexity of the acute response in trachoma but are able to partly explain the biology of trachoma through the identification of pathways and gene expression sets useful to future studies on chlamydial immunopathogenesis. Conjunctival samples from 60 participants were tested on U133 plus 2.0 arrays (40 participants with clinical signs of active trachoma and 20 controls with normal conjunctivas as before). Samples were further sub-divided based on the detection and quantification of ocular Chlamydia trachomatis load by PCR tests. Gene expression was then assessed using differential expression and construction of co-expression networks. The content of the constructed gene lists which were identified as part of a network or differentially expressed were then tested for enrichment using publically available analysis tools to identify biological pathways expressed in the conjunctiva during C. trachomatis infection and disease episodes.
2010-09-03 | E-GEOD-20436 | biostudies-arrayexpress
Project description:Conjunctival samples from 60 individuals with and without the clinical signs of active trachoma were analysed on the U133 Plus 2.0 arrays. Global transcriptional changes characteristic of disease and infection phenotypes were identified. Two analysis methods found large numbers of differentially regulated genes and the existence of networks of co-expressed genes. There were signatures characteristic of the host defence response with evidence supporting infiltration of various types of leukocytes and activation of innate responses of epithelial cells. Two separate methods could classify disease and infection phenotype based on transcription signatures with 70% accuracy. These results provide an insight into the complexity of the acute response in trachoma but are able to partly explain the biology of trachoma through the identification of pathways and gene expression sets useful to future studies on chlamydial immunopathogenesis.
2010-09-03 | GSE20436 | GEO
Project description:Results from 29 samples tested on the Affymetrix HG-focused target array identified transcriptional changes characteristic of ocular disease and ocular Chlamydia trachomatis infection phenotypes. Large numbers of differentially regulated genes were demonstrated. These were characteristic of the host defence response and typical of innate responses at epithelial surfaces and infiltrating leukocytes. These results provide an insight into the complexity of the acute response in trachoma. Samples from 29 participants were tested on the HG-Focus target arrays (17 participants with clinical signs of active trachoma and 12 study participants with normal conjunctivas from the same trachoma endemic population as controls). Conjunctival samples from an additional 60 participants were tested on U133 plus 2.0 arrays and are reported elsewhere. This second set of independent samples was used to assess different gene classifier selection methods and validation tests using >8500 common probe-sets shared between HG-focus target and U133 plus 2.0 arrays. Potential biomarkers of disease and infection are identified.
2010-09-03 | E-GEOD-20430 | biostudies-arrayexpress
Project description:Trachoma, a preventable blinding eye disease, is initiated by ocular infection with Chlamydia trachomatis (Ct). MicroRNA (miR) are post-transcriptional regulators of gene expression and play a major role in health and disease. We have investigated the miR profile during C. trachomatis infection of epithelial cells in vitro and in vivo during follicular trachoma with current C. trachomatis infection. Small RNA sequencing was carried out on human epithelial cells infected in vitro and on samples from five children with follicular trachoma with current Ct infection and five children with no evidence of clinical trachoma or infection. In vitro two strains of ocular Ct that differ in virulence, A2497 and isogenic plasmid-free A2497 were used to infect epithelial cell lines. RNAseq results were confirmed by qPCR in six in vitro biological replicates and in 163 clinical samples. Differential miR expression was not detected in isolated epithelial cells infected in vitro at 48 hours post infection. HCjE cells, a conjunctival epithelial cell line, have markedly different miR background expression compared to Hep2 cells. The differing miR profiles of Hep2c and HCjE suggest caution should be used when extrapolating data from Hep2 cells to a tissue-specific clinical scenario. In follicular trachoma, miR-155, miR-150, miR-142, miR-181b, miR-181a, miR-342 and miR-132 were up-regulated during current Ct infection. MiR-4728 and miR-184 were down-regulated in follicular trachoma independent of Ct infection. In follicular trachoma, miR expression reflects development and regulation of the immune response during current Ct infection and a prolonged period of wound healing following Ct clearance.
2016-02-04 | GSE69837 | GEO
Project description:To ascertain which genes are involved in the outcome of Leishmania infantum infection and immunopathology of human visceral leishmaniasis (VL), we investigated the transcriptional profile of whole blood samples from patients diagnosed with active VL compared to asymptomatic individuals (positive serology for Leishmania, but without clinical signs of disease) and healthy control samples.
2020-08-06 | E-MTAB-8818 | biostudies-arrayexpress
Project description:The study aimed to define transcriptional signatures for detection of active TB (TB) compared to latent TB infection (LTBI) as well as to other diseases (OD) with similar clinical phenotypes in patients with and without HIV in two African paediatric populations. Transcriptional signatures were identified that distinguished active TB from LTBI, and active TB from other diseases. Children were recruited from Cape Town, South Africa (n=157) and Blantyre, Malawi (n=177) who were either HIV+ or HIV - with either active TB, LTBI or OD. Blood was collected into PAX gene tubes (PreAnalytiX). Total RNA integrity was assessed using an Agilent 2100 Bioanalyzer (Agilent, Palo Alto, CA). Labeled cRNA was hybridized to Illumina Human HT-12 Beadchips. Data were analysed in R.
2014-05-01 | E-GEOD-39940 | biostudies-arrayexpress
Project description:To ascertain which genes are involved in the outcome of Leishmania infantum infections and immunopathology of human visceral leishmaniasis (VL), we investigated the transcriptional profile of whole blood samples from patients during active VL compared to the same patients 180 days after being treated, when they were considered clinically cured. Also, we compared VL transcriptional profile to asymptomatic individuals (positive serology for Leishmania, but without clinical signs of disease) and healthy uninfected control samples.
2022-03-10 | E-MTAB-11047 | biostudies-arrayexpress