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Trypanosoma vivax Y486 bloodstream stage RNAseq

ABSTRACT: 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.

ORGANISM(S): Trypanosoma vivax

SUBMITTER: Lin Quan

PROVIDER: E-MTAB-475 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Variation in gene transcription between life stages of Trypanosoma vivax

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

P. vivax: proof-of-principle global transcription analysis from two wild isolates

Project description:The complete genome sequence of the P. vivax Sal-1 strain allowed the design of a first version array representing 1 oligo/2 kb of coding sequences (http://zblab.sbs.ntu.edu.sg/vivax/index.html). Here, proof-of-principle experiments using total RNA of parasites obtained from the Sal-1 strain, from P. falciparum and from parasites obtained directly from two human patients are presented. To determine the extent of cross-hybridization of P. falciparum with P. vivax, and to determine overlaps in expression profiles of the P. vivax Sal1 monkey-adapted strain vs wild isolates, single dual hybridization analyses were performed.

2008-04-12 | E-GEOD-11075 | biostudies-arrayexpress

P. vivax: proof-of-principle global transcription analysis from two wild isolates

2008-04-12 | GSE11075 | GEO

[E-MTAB-475] Trypanosoma vivax Y486 bloodstream stage RNAseq

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. ArrayExpress Release Date: 2011-02-16 Person Roles: submitter Person Last Name: Quan Person First Name: Lin Person Mid Initials: Person Email: ql3@sanger.ac.uk Person Phone: 01223 834244 Person Address: Wellcome Trust Genome Campus,Hinxton,Cambridge. CB10 1SA UK Person Affiliation: Wellcome Trust Sanger Institute Person Roles: Investigator Person Last Name: Jackson Person First Name: Andrew Person Mid Initials: P Person Email: aj4@sanger.ac.uk Person Phone: 01223 834244 Person Address: Wellcome Trust Genome Campus,Hinxton,Cambridge. CB10 1SA UK Person Affiliation: Wellcome Trust Sanger Institute Person Roles: Project Coordinator Person Last Name: Sanders Person First Name: Mandy Person Mid Initials: J Person Email: mjs@sanger.ac.uk Person Phone: 01223 834244 Person Address: Wellcome Trust Genome Campus,Hinxton,Cambridge. CB10 1SA UK Person Affiliation: Wellcome Trust Sanger Institute

2011-07-14 | GSE30609 | GEO

Transcriptome profiling of Plasmodium vivax in Saimiri monkeys identifies potential ligands for invasion

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

Whole-genome sequencing and microarray analysis of ex vivo Plasmodium vivax reveal selective pressure on putative drug resistance genes

Project description:Plasmodium vivax causes 25-40% of malaria cases worldwide, yet research on this human malaria parasite has been neglected. Nevertheless, the recent publication of the P. vivax reference genome now allows genomics and systems biology approaches to be applied to this pathogen. We show here that whole genome analysis of the parasite can be achieved directly from ex vivo-isolated parasites, without the need for in vitro propagation. A single isolate of P. vivax obtained from a febrile patient with clinical malaria from Peru was subjected to whole genome sequencing (30X coverage). This analysis revealed over 18,261 single nucleotide polymorphisms (SNPs), 6,257 of which were further validated using a tiling microarray. Within core chromosomal genes we find that one SNP per every 985 bases of coding sequence distinguishes this recent Peruvian isolate, designated IQ07, from the reference Sal1 strain obtained in 1970. This full-genome sequence of a P. vivax isolate, the second overall and first of an uncultured patient isolate, shows that the same regions with low numbers of aligned sequencing reads are also highly variable by genomic microarray analysis. Finally, we show that the genes containing the largest ratio of nonsynonymous to synonymous SNPs encode two AP2 transcription factors and the P. vivax multidrug resistance-associated protein (PvMRP1), an ABC transporter shown to be associated with quinoline and antifolate tolerance in P. falciparum. This analysis provides a new data set for comparative analysis with important potential for identifying markers for global parasite diversity and drug resistance mapping studies. Genome DNA from Peruvian P. vivax Isolate IQ07 vs. Reference Sal1

2010-10-02 | E-GEOD-23982 | biostudies-arrayexpress

Whole-genome sequencing and microarray analysis of ex vivo Plasmodium vivax reveal selective pressure on putative drug resistance genes

2010-10-02 | GSE23982 | GEO

Next-generation diagnostic biomarkers for vivax malaria

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2020-01-30 | PXD015165 | Pride

New insights into the Plasmodium vivax transcriptome using RNA-seq

Project description:Transcription profile of the Plasmodium vivax intraerythrocytic cycle Total RNA in Plasmodium vivax strain at every 6 hour of intraerythrocytic cycle using RNA-seq

2016-02-11 | E-GEOD-61252 | biostudies-arrayexpress

PvSDP1 and its role in Extracellular Vesicles-Mediated Intrasplenic Infections in Plasmodium vivax

Project description:Recent studies indicate that the human spleen contains over 95% of the total parasite biomass during chronic asymptomatic infections caused by Plasmodium vivax. Previous studies have demonstrated that extracellular vesicles (EVs) secreted from infected reticulocytes facilitate binding to human spleen fibroblasts (hSFs) and identified parasite genes whose expression was dependent on an intact spleen. Here, we characterize the P. vivax spleen-dependent hypothetical gene (PVX_114580). Using CRISPR/Cas9, PVX_114580 was integrated into P. falciparum 3D7 genome and expressed during asexual stages. Immunofluorescence analysis demonstrated that the protein, which we named P. vivax Spleen-Dependent Protein 1 (PvSDP1), was located at the surface of infected red blood cells in the transgenic line and this localization was later confirmed in natural infections. Plasma-derived EVs from P. vivax-infected individuals (PvEVs) significantly increased cytoadherence of 3D7_PvSDP1 transgenic line to hSFs and this binding was inhibited by anti-PvSDP1 antibodies. Single-cell RNAseq of PvEVs-treated hSFs revealed increased expression of adhesion-related genes. These findings demonstrate the importance of parasite spleen-dependent genes and EVs from natural infections in the formation of intrasplenic niches in P. vivax, a major challenge for malaria elimination.

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