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Expression data from whole blood samples of Rwandan adults with mild malaria with matched sample thirty days later (convalescence)

ABSTRACT: Host factors governing mild disease in adults who have developed clinical immunity to Plasmodium falciparum may provide insights for disease altering vaccine or interventions, to prevent severe malaria We used microarrays of whole blood samples during mild malaria and compared them in a paired analysis to whole blood microarray 30 days later. (n=19 pairs)

ORGANISM(S): Homo sapiens

PROVIDER: GSE64338 | GEO | 2014/12/19

SECONDARY ACCESSION(S): PRJNA270766

REPOSITORIES: GEO

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Expression data from whole blood samples of Rwandan adults with mild malaria with matched sample thirty days later (convalescence)

Project description:Host factors governing mild disease in adults who have developed clinical immunity to Plasmodium falciparum may provide insights for disease altering vaccine or interventions, to prevent severe malaria We used microarrays of whole blood samples during mild malaria and compared them in a paired analysis to whole blood microarray 30 days later. (n=19 pairs) 3mL of whole blood was immediately placed in Tri-Reagent BD, frozen; high quality pairs were selected, were randomly selected for hybridization and analysis. Sense strand cDNA was generated from total RNA using the Ambion® WT Expression Kit (Life Technologies, Grand Island, NY) and labeling was done with the GeneChip® WT Terminal Labeling Kit (Affymetrix, Santa Clara, CA) for use with the GeneChip® Human Gene 1.0 ST Arrays (Affymetrix). The array image was generated by a high-resolution GeneArray Scanner 3000 7G (Affymetrix).

2014-12-19 | E-GEOD-64338 | biostudies-arrayexpress

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Paired whole blood human transcription profiles from children with severe malaria and mild malaria

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Project description:PBMCs were obtain from mild malaria and cerebral malaria patient at the onset of P. falciparum infection. Patient recruitment took place in two hospital centers in Senegal Total RNAs from PBMCs of mild and cerebral malaria patients were profiled after hybridization with Agilent SurePrint G3 Human GE 8x60K Microarray to identify blood biomarkers for cerebral malaria phenotype Plasmodium falciparum malaria remains a major health problem in Africa. The mechanisms of pathogenesis leading to the severe form of the disease are not fully understood. Blood transcriptional profiles were investigated in patient with cerebral malaria, noncerebral malaria , and mild malaria by using the microarray technology. We identified a set of 447 genes that was differentially expressed between the three patient groups after a false discovery rate of 10%. Since the cerebral patients displayed a particular transcriptional pattern, we focused our analysis on the differences between cerebral malaria patients and mild malaria patients. We further found 849 genes differentially expressed after a false discovery rate of 10%. We validated our results by using the qPCR method for 5 genes. The enrichment analysis of their functional annotation indicates that genes involved in A, B, C pathways play a role in the occurrence of cerebral malaria. These results provide new insight into the potential effect of the dysregulation of gene expression and specific pathways. Host genetic variation may partly explain such alteration of gene expression. Further studies are required to investigate this in African populations.

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Blood transcriptional profiles discriminates cerebral and mild malaria patient living in Senegal

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Effect of mild hyperthermia on Mk differentiation

Project description:Physical factors can have major influences on the proliferation and differentiation fate of hematopoietic stem cells in culture. Recently, we demonstrated that cord blood CD34+ cells undergo accelerated and increased megakaryocyte differentiation when incubated at 39°C. In this study, we investigated in detail the impacts of mild hyperthermia on the kinetics of megakaryocyte differentiation, maturation, polyploidization and cell viability. The qualitative and quantitative effects on Mk differentiation were found to be rapidly induced, and optimization of the culture length at 39°C led to greater Mk yields. Mild hyperthermia did not promote endomitosis of cord blood-derived Mk, but rather led to a small reduction in the proportion of polyploid Mk. Moreover, it had little impact on viability but induced a significant shift in the proportion of cells undergoing apoptosis at 37°C to necrosis at 39°C. Finally, our results suggest that the effects on megakaryocyte differentiation could be the consequences of aberrant expression of key megakaryocyte transcription factors induced by mild hyperthermia. Keywords: Effect of mild hyperthermia on Mk differentiation

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