Plasmodium falciparum var genes transcribed in severe malaria
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ABSTRACT:
PROVIDER: PRJEB20632 | ENA |
REPOSITORIES: ENA
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Project description:Genome wide transcriptome analyses could reveal whether parasites causing severe malarial disease express different genes to those causing uncomplicated malaria. This knowledge could inform therapy and vaccine design targeting severe disease. Venous samples were collected from patients with severe (n=23) and uncomplicated (n=21) malaria attending a healthcare facility in Timika, Papua Province, Indonesia. This area has unstable malaria transmission with estimated annual parasite incidence of 450 per 1000 population and symptomatic illness in all ages. Severe malaria was defined as peripheral parasitaemia with at least one modified World Health Organization (WHO) criterion of severity. Erythrocytes were immediately isolated from whole blood, solubilised in RNA preservative and frozen. Libraries were 100 bp paired end sequenced on a 2500-HT Hiseq (Illumina) using RapidRun chemistry (Illumina).
2018-02-08 | E-MTAB-5860 | biostudies-arrayexpress
Project description:This study examined the differences in human and parasite gene expression pattern between children with severe malaria and those with uncomplicated malaria through a dual RNA-seq approach. Peripheral blood samples were collected which contained substantial numbers of parasites that required no RNA enrichment prior to library preparation and sequencing.
2018-06-20 | E-MTAB-6413 | biostudies-arrayexpress
Project description:We hypothesized that differential gene expression contributes to phenotypic variation of parasites which results in specific interaction of Plasmodium falciparum with its human host. In this study we used microarray hybridization to analyse the transcriptomes of P.falciparum isolated from asymptomatic carriers and from cerebral and uncomplicated malaria patients. We also investigated the transcriptomes of the 3D7 clone and the selected 3D7-Lib line.
2014-12-01 | E-MTAB-2139 | biostudies-arrayexpress
Project description:Paper: Transcriptional Profiling of Plasmodium falciparum Parasites from Patients with Severe Malaria Identifies Distinct Low vs. High Parasitemic Clusters Milner et al Plos One July 18, 2012 Plasmodium falciparum Parasites from Patients with Severe Malaria
2016-06-24 | E-GEOD-83667 | biostudies-arrayexpress
Project description:Severe malaria (SM) is a life-threatening condition caused by Plasmodium falciparum and the most severe presentation is cerebral malaria (CM) mostly affecting children under five years old. The comprehensive understanding of the complex mechanisms driving the pathophysiology of CM, which encompasses both host and parasite factors, remains insufficiently elucidated. This study analyzed clinical isolates from Beninese children using liquid chromatography-mass spectrometry to identify differentially expressed proteins in SM compared to uncomplicated malaria (UM) patients. We showed a down-regulation of proteins involved in ubiquitination and proteasomal protein degradation in infected erythrocytes from CM patients. In plasma we observed that proteasome 20S components were more abundant in SM patients, which could potentially be useful as a severity biomarker. Furthermore, transferrin receptor protein 1 was specifically upregulated in CM infected erythrocyte isolates which raises the hypothesis that parasites causing CM could preferably infect reticulocytes or erythroid precursors. Consistently with this hypothesis we also found that parasite proteins implicated in distinct biosynthesis pathways were upregulated in CM. Moreover, functional analysis showed deregulated iron metabolism and ferroptosis pathways associated with CM presentation. Further investigations are required to confirm these findings and determine their potential for clinical application.
2024-02-01 | PXD042503 | Pride
Project description:Gene expression data from whole-blood collected from healthy Vietnamese subjects (n=8) or from patients admitted to hospital with acute uncomplicated (n=9) or complicated (n=20) Plasmodium falciparum malaria infection. A clinical history design type is where the organisms clinical history of diagnosis, treatments, e.g. vaccinations, surgery etc. Disease State: patient with complicated or uncomplicated Plasmodium falciparum malaria infection or Healthy control clinical_history_design
2016-02-15 | E-GEOD-35858 | biostudies-arrayexpress
Project description:Gene expression data from whole-blood collected from healthy Vietnamese subjects (n=8) or from patients admitted to hospital with acute uncomplicated (n=9) or complicated (n=20) Plasmodium falciparum malaria infection. A clinical history design type is where the organisms clinical history of diagnosis, treatments, e.g. vaccinations, surgery etc. Disease State: patient with complicated or uncomplicated Plasmodium falciparum malaria infection or Healthy control
2016-02-15 | GSE35858 | GEO
Project description:The most severe form of Plasmodium falciparum infection, cerebral malaria (CM), is linked to the parasite’s ability to bind to specific endothelial receptors in brain capillaries. However, the host and parasitic factors causing CM are not yet fully elucidated and the transcriptome profile of P. falciparum isolated from patients with CM remains largely unknown. To complement this deficiency, we aimed to characterize the gene expression associated with CM, by sequencing the parasite’s transcriptome from 15 CM and 15 uncomplicated malaria Beninese children. We demonstrated a specific gene expression in CM, making it possible to completely distinguish the two clinical phenotypes. Numerous biological pathways including entry into host and cytoadherence were predicted as impacted. In addition, infected erythrocytes (iE) from CM children had a decreased circulation time. It may be the result of a stronger adhesion capacity of these iE, which we previously demonstrated in vitro. Consistent with this result, we were able to measure an overall increased expression of the var genes family, encoding for the major mediator of adherence to host endothelium. This phenomenon may allow iE to avoid splenic clearance and cause the increased parasitaemia measured in CM.
2021-10-31 | GSE186820 | GEO
Project description:Whole blood transcriptomes from a longitudinal study of 5 Malawian children who first present with severe Plasmodium falciparum malaria, and return in one month with mild malaria We used microarrays to identify transcripts that were associated with each clinical presentation. A blood sample was taken upon presentation during the severe and mild malaria episodes in 5 Malawian children (total n=5 pairs) followed by RNA extraction and hybridization on Affymetrix GeneChip Human Gene 1.0 ST Array, using a paired analysis
2012-01-11 | E-GEOD-33811 | biostudies-arrayexpress
Project description:Paper: Transcriptional Profiling of Plasmodium falciparum Parasites from Patients with Severe Malaria Identifies Distinct Low vs. High Parasitemic Clusters Milner et al Plos One July 18, 2012
2016-06-24 | GSE83667 | GEO