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Whole spleen transcriptome during acute phase of infection in an avirulent Plasmodium chabaudi chabaudi AS infection.

ABSTRACT: Whole spleen transcriptome during acute phase of infection in an avirulent Plasmodium chabaudi chabaudi AS infection.

PROVIDER: PRJNA508619 | ENA |

REPOSITORIES: ENA

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Whole spleen transcriptome during acute phase of infection in an avirulent Plasmodium chabaudi chabaudi AS infection.

Project description:The spleen is considered as the major lymphoid organ involved in generating immune responses to the erythrocytic stages of the malaria parasite, Plasmodium, but access to human spleens is not practical and most studies rely on peripheral blood for assessing immune responses. However, the suitability of peripheral blood as a proxy for splenic immune responses is unknown. Here, we have analysed transcriptome activity for whole spleens over 12 days of erythrocytic stage Plasmodium chabaudi infection in C57BL/6 mice. These data will be compared with comparable data taken from whole blood: and previously published: GSE93631

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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.

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Sex Differences in Response to Plasmodium chabaudi Infection: Involvement of Gonadal Steroids

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Transcription profiling of mouse sex differences in response to Plasmodium chabaudi infection: involvement of gonadal steroids

Project description:The goal of this study was to examine whether immune responses to Plasmodium chabaudi infection differ between the sexes and are altered by the presence of gonadal steroids. Gonadally-intact males were more likely than intact females to die following P. chabaudi infection, exhibit slower recovery from infection-associated weight loss, hypothermia, and anemia, have reduced IFNÎ³-associated gene expression and IFNÎ³ production during peak parasitemia, and produce less antibody during the recovery phase of infection. Gonadectomy of male and female mice altered these sex-associated differences, suggesting that sex steroid hormone, in particular androgens and estrogens, may modulate immune responses to infection. Experiment Overall Design: Intact and gonadectomized (gdx) male and female C57BL/6 mice were inoculated with 106 P. chabaudi AS-infected erythrocytes and responses to infection were monitored. For microarray analyses, RNA was isolated from 5 x 106 white blood cells (WBCs) that were isolated from spleens 0, 3, 7, or 14 days after inoculation with P. chabaudi. Equivalent aliquots of RNA from 3 animals/treatment group were pooled and 3 separate pools were processed on separate Affymetrix GeneChips (n = 3 GeneChips/time point/treatment group).

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