Plasmodium chabaudi
Ontology highlight
ABSTRACT:
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| Other | ||||
| SRR9283280_1.fastq.gz | Fastqsanger.gz | |||
| SRR9283280_2.fastq.gz | Fastqsanger.gz | |||
| SRR9283290_1.fastq.gz | Fastqsanger.gz | |||
| SRR9283290_2.fastq.gz | Fastqsanger.gz |
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Project description:The aim of this study is to characterise gene expression in the rodent malaria intra-erthrocytic development cycle. This will inform two further studies looking at host-parasite interactions in rodent malaria and in comparison to the same stage of human malaria will provide insight into variation in lifecycles between human and rodent malaria. 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/
2013-07-01 | E-ERAD-162 | biostudies-arrayexpress
Project description:Analysis of blood samples taken throughout the acute phase of infection from mice infected with avirulent P. chabaudi AS strain or virulent CB strain The influence of parasite genetic factors on immune responses and development of severe pathology of malaria is largely unknown. In this study, we performed genome-wide transcriptomic profiling of whole blood during blood-stage infections of two strains of the rodent malaria parasite Plasmodium chabaudi that differ in virulence. We identified several transcriptomic signatures associated with the virulent infection, including signatures for lung inflammation, stronger and prolonged anemia and platelet aggregation. The latter two signatures were detected prior to pathology. The anemia signature indicated deregulation of host erythropoiesis, and the lung inflammation signature was linked to increased neutrophil infiltration, more cell death and greater parasite sequestration in the lungs. This comparative whole-blood transcriptomics profiling of virulent and avirulent malaria infections shows the validity of this approach to inform severity of malarial infection and provide insight into pathogenic mechanisms.
2017-02-01 | GSE93631 | GEO
Project description:The pir genes comprise the largest multi-gene family in Plasmodium, with members found in P. vivax, P. knowlesi and the rodent malaria species. Despite comprising up to 5% of the parasite genome, little is known about the functions of the proteins encoded by pir genes. P. chabaudi causes chronic infection in mice, which may be due antigenic variation. In this model, pir genes are called cirs and may be involved in this mechanism allowing evasion of host immune responses. We have annotated the cir repertoire and performed detailed bioinformatic characterization of the encoded CIR proteins. Two major sub-families were identified: A and B, which display different amino acid motifs, and are thus predicted to have undergone functional divergence. The expression of all cirs was analyzed via RNA sequencing and microarray. Up to 40% of cir genes were expressed in the parasite population during infection, including members of both sub-families. Dominant cir transcripts could also be identified. Finally, specific cir genes were expressed at different time points during the blood stages of infection. Together our data characterizing the cir genes and their expression throughout the intra-erythrocytic cycle of development indicate that CIR proteins are likely to be important for parasite survival in the host. P. chabaudi AS is a highly synchronous parasite for which development in the blood follows its hostM-bM-^@M-^Ys circadian rhythm. Twelve time-points were then collected; one every two hours, to cover the entire 24 h cycle of blood stage development. At the peak of parasitaemia, one mouse was sacrificed at each time point and thin blood films were made and stained with Giemsa for optical microscopy. The pan-rodent microarray was designed using the OligoRankPick program as previously described: Liew, K et al.2010, Defining species specific genome differences in malaria parasites. BMC genomics 11,128. The RNA preparation, Cy-dye coupling to cDNA, hybridization and slide scanning were performed as described by Bozdech and colleagues Bozdech, Z et al 2003, The transcriptome of the intraerythrocytic developmental cycle of Plasmodium falciparum. PLoS Biol 1, E5.
2012-05-31 | E-GEOD-33333 | biostudies-arrayexpress
Project description:The pir genes comprise the largest multi-gene family in Plasmodium, with members found in P. vivax, P. knowlesi and the rodent malaria species. Despite comprising up to 5% of the parasite genome, little is known about the functions of the proteins encoded by pir genes. P. chabaudi causes chronic infection in mice, which may be due antigenic variation. In this model, pir genes are called cirs and may be involved in this mechanism allowing evasion of host immune responses. We have annotated the cir repertoire and performed detailed bioinformatic characterization of the encoded CIR proteins. Two major sub-families were identified: A and B, which display different amino acid motifs, and are thus predicted to have undergone functional divergence. The expression of all cirs was analyzed via RNA sequencing and microarray. Up to 40% of cir genes were expressed in the parasite population during infection, including members of both sub-families. Dominant cir transcripts could also be identified. Finally, specific cir genes were expressed at different time points during the blood stages of infection. Together our data characterizing the cir genes and their expression throughout the intra-erythrocytic cycle of development indicate that CIR proteins are likely to be important for parasite survival in the host.
2012-06-01 | GSE33333 | GEO
Project description:Malarial rhythmic fevers are the consequence of the synchronous bursting of red blood cells (RBCs) upon completion of the malaria parasite asexual cell-cycle. Here we hypothesized that an intrinsic clock in the parasite underlies the modulo-24h rhythms of RBC bursting. We show that parasite rhythms are plastic and slow down to match rhythms of hosts with long circadian period. We also demonstrate that malaria rhythms persist even when host food intake is evenly spread across 24h, suggesting that host feeding cues are not required for synchrony. Moreover, we find that the parasite population remains synchronous and rhythmic even in an arrhythmic clock mutant host. Thus, we propose that parasite rhythms are generated by the parasite, possibly to anticipate its rhythmic changing environment.
2020-07-17 | GSE145855 | GEO
Project description:This study is a collaboration with Phil Spence and Jean Langhorne at NIMR, Mill Hill where Phil is studying the differences in aetiology of rodent malaria when mice are infected by mosquito bite versus intraperitoneal injection of blood stage parasites. The aim is to determining transcriptomic differences using RNA-Seq between parasites transmitted by mosquito and those transmitted by injection. 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/Protocol: Mice were bled out at 6 days post-infection, and RNA was extracted from purified parasite populations using Trizol reagent and DNase treated. Poly A+ mRNA was purified from total RNA using oligo dT dyna bead selection and libraries were created using a modified RNA-seq protocol, where RNA was fragmented using Covaris AFA sonication instead of metal ions. The samples were sequenced on an Illumina HiSeq 2000.
2012-11-27 | E-ERAD-95 | biostudies-arrayexpress
Project description:The purpose of this research is to identify and evaluate the global gene expression of the rodent malaria parasites Plasmodium yoelii, Plasmodium berghei and Plasmodium chabaudi blood-stage parasites and specifically compare the blood stage gene expression profiles of samples derived from previous studies on Plasmodium falciparum, Plasmodium vivax and Plasmodium knowlesi
2016-04-08 | GSE80015 | GEO
Project description:In order to identify RNA binding proteins that are essential for male gametogenesis in the rodent malaria parasite P. yoelii, we conducted RNA-seq analysis to identify RBPs that are specifically expressed in male gametocytes.
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Project description:Comparative analysis of the rodent malaria genome Plasmodium chabaudi AS
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