VIPERS
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ABSTRACT:
PROVIDER: PRJEB81739 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Unlike in Asia and Latin America, Plasmodium vivax infections were rare in Sub-Saharan Africa due to the absence of the Duffy blood group antigen (Duffy Antigen), the only known erythrocyte receptor for the P. vivax merozoite invasion ligand, Duffy Binding Protein 1 (DBP1). However, P. vivax infections have been documented in Duffy-negative individuals throughout Africa, suggesting that P. vivax may use ligands other than DBP1 to invade Duffy-negative erythrocytes through other receptors. To identify potential P. vivax ligands, we compared parasite gene expression in Saimiri and Aotus monkey erythrocytes infected with P. vivax Salvador I (Sal I). DBP1 binds Aotus but does not bind to Saimiri erythrocytes, and thus P. vivax Sal I must invade Saimiri erythrocytes independently of DBP1. Comparing RNA sequencing (RNAseq) data for late stage infections in Saimiri and Aotus erythrocytes when invasion ligands are expressed, we identified genes that belong to tryptophan-rich antigen and MSP3 families that were more abundantly expressed in Saimiri infections as compared to Aotus infections. These genes may encode potential ligands responsible for P. vivax infections of Duffy-negative Africans.
2019-04-17 | GSE125284 | GEO
Project description:Human African Trypanosomiasis (HAT) is a disease of major economic importance in Sub-Saharan Africa. In eastern and southern Africa. Here we analysed clinical isolates of T brucei rhodensiense, resistant to suramin by shotgun proteomics . And identified parasite proteins whose expression is associated with resistance to suramin.
2021-09-09 | PXD021560 | Pride
Project description:Non-typhoidal Salmonella serotypes (NTS) cause a self-limited gastroenteritis while pediatric patients with severe Plasmodium falciparum malaria can develop a life threatening bacteremia that is a major source of child mortality in sub-Saharan Africa. We used microarrays to detail genome-scale gene expression profiles underlying gastrointestinal immune responses to bacterial infection in mice
2012-08-01 | GSE30974 | GEO
Project description:Non-typhoidal Salmonella serotypes (NTS) cause a self-limited gastroenteritis while pediatric patients with severe Plasmodium falciparum malaria can develop a life threatening bacteremia that is a major source of child mortality in sub-Saharan Africa. We used microarrays to detail genome-scale gene expression profiles underlying gastrointestinal immune responses to bacterial infection in mice Responses were measured in mouse cecal mucosa to infection of non-typhodal Salmonella and Plasmodium yoelii, both singularly and in combination.
2012-07-31 | E-GEOD-30974 | biostudies-arrayexpress
Project description:High density oligonucleotide microarrays have been used on Plasmodium vivax field isolates to estimate whole genome expression. However, no microarray platform has been experimentally optimized for studying the transcriptome of field isolates. In the present study, we adopted both bioinformatics and experimental testing approaches to select best optimized probes suitable for detecting parasite transcripts from field samples and included them in designing a custom 15K P. vivax microarray. This microarray has long oligonucleotide probes (60mer) that were in-situ synthesized onto glass slides using Agilent SurePrint technology and has been developed into an 8X15K format (8 identical arrays on a single slide). Probes in this array were experimentally validated and represents 4180 P. vivax genes in sense orientation, of which 1219 genes have also probes in antisense orientation. Validation of the 15K array by using field samples (n=14) has shown 99% of parasite transcript detection from any of the samples. Correlation analysis between duplicate probes (n=85) present in the arrays showed perfect correlation (r2=0.98) indicating the reproducibility. Multiple probes representing the same gene exhibited similar kind of expression pattern across the samples (positive correlation, r≥0.6). Comparison of hybridization data with the previous studies and quantitative real-time PCR experiments were performed to highlight the microarray validation procedure. This array is unique in its design, and results indicate that the array is sensitive and reproducible. Hence, this microarray could be a valuable functional genomics tool to generate reliable expression data from P. vivax field isolates.
2016-10-18 | GSE55644 | GEO
Project description:Trypanosoma vivax is a major pathogen of domestic cattle and wildlife across sub-Saharan Africa. For many years, the WTSI has had a research interest in developing a genome sequence for T. vivax, as part of a wider programme concerning African trypanosome parasites of Humans and animals. In 2012 a draft genome sequence for T. vivax Y486 was published by the WTSI and our collaborators in comparison with related species, T. brucei and T. congolense. This study identified numerous putative genes in T. vivax that have no known affinity and are therefore species-specific. A related transcriptomic study confirmed that some of these putative genes are transcribed, but lacked accuracy and was based on a single parasite life stage only. Until recently, it has not been possible to culture different T. vivax life stages in refined media. There is now the opportunity to use new approaches to produce whole cell RNA for both insect and bloodstream parasite stages. We sequence stage-specific cDNA and identify stage-specific genes, and compare these features with similar data already available for T. brucei and T. congolense, which display substantial differences in their developmental cycles. This data is part of a pre-publication release. For information on the proper use of pre-publication data shared by the Wellcome Trust Sanger Institute (including details of any publication moratoria), please see http://www.sanger.ac.uk/datasharing/
2013-03-07 | E-ERAD-100 | biostudies-arrayexpress
Project description:Plasmodium vivax Genome Sequencing - Field Isolates
| PRJNA175266 | ENA
Project description:Trypanosoma vivax is a vector-borne blood parasite of cattle throughout sub-saharan Africa. For some years the genome sequence of this organism has been in development at the Wellcome Trust Sanger Institute and is shortly to be completed. Analysis of the genome has revealed various putative genes encoding unknown proteins. In an effort to validate these features we will sequence mRNA transcripts from the bloodstream stage of the genome strain Y486. Most of the novel gene families identified from the genome sequence are too diverse to be validated individually, i.e. through RT-PCR, so it is necessary to sequence all cellular transcripts. We hope to confirm the transcription of one or all members of the novel gene families from the resulting transcriptome. While essential for the scientific rigour of the present genome project, this transcriptome will also provide an additional resource for the longer-term benefit of the research community.
2011-02-16 | E-MTAB-475 | biostudies-arrayexpress
Project description:Sorghum bicolor is one of the most important cereal crops in the world, predominantly grown in sub‑Saharan Africa by smallholder farmers. Despite its outstanding resilience to abiotic stresses, approximately 20% of sorghum yield is annually lost on the African continent due to infestation with the parasitic weed Striga hermonthica. Existing Striga management strategies to decrease Striga infestation often show low efficiency and are not easily integrated into current agricultural practices. Microbial-based solutions may prove an effective, low-cost mode for reducing Striga parasitism in sub-Saharan Africa. Here, we demonstrate that the microbiome component of a field soil suppresses Striga infection of sorghum. Potential mechanisms underlying the soil microbiome’s influence on the host plant include root endodermal suberization and aerenchyma formation. Moreover, we observed a depletion of haustorium inducing factors, compounds essential for Striga to establish the host-parasite association, in root exudates collected from sorghum grown in the presence of the soil microbiome as compared to sterile conditions. We further identified individual microbial taxa associated with reduced Striga infection via changes in root cellular anatomy and differentiation as well as in exudate composition. Our study identifies a suite of traits that can be harnessed by individual microbial isolates or their consortia to induce Striga resistance. Combining microbes that elicit Striga resistance directly (affecting the parasite) via repression of haustorium formation with those that act indirectly (affecting the host), by reducing of Striga penetration through root tissue, can broaden the effectiveness of microbe-induced protection from Striga.
2022-10-31 | GSE216351 | GEO