Human Macrophage Response to Leishmania (Viannia) panamensis Infection: Evidence for an Early Inflammatory Response
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ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE25819 | GEO | 2012/12/25
SECONDARY ACCESSION(S): PRJNA135629
REPOSITORIES: GEO
Similar Datasets
Project description:Transcriptional profile of human monocyte-derived macrophages infected with L.(V.)panamensis was compared to the profile of uninfected cells to delineate transcriptional activation triggered by the infection. two condition experiment: human monocyte-derived macrophages infected with L.(V.)panamensis. 6-5 donors per time point. 3 times point. 1-3 replicates per donor-time point.
2012-12-25 | E-GEOD-25819 | biostudies-arrayexpress
Project description:Leishmania (L.) are obligated intracellular protozoan parasites that develop electively in macrophages. These cells that are acting as a safe shelter for the pathogens but also as their ultimate killer, making them the alpha and the omega during leishmaniasis diseases. Macrophages are able to secrete a remarkably diverse set of regulators known to influence the physiological functions and differentiation of neighboring cells to trigger an adaptive immune response of protective Th1-type cells, whereas parasites have developed a wide range of mechanisms to circumvent the host’s immune responses. Most of our understanding of this host-parasite conflict, in the context of macrophage invasion by L. major metacyclic promastigotes, has been gleaned from studies investigating the macrophage responses at late and unique time points after infection. To investigate the dynamics of this duel, we have analyzed the transciptomic profile of monocyte-derived human macrophages at different time points during the first 24h upon in vitro infection using high throughput microarray platform. The gene expression profile of 17,838 genes showed high expression variability between the three human donors at different time points post infection. Cross comparison between the three donors allowed the identification of a common set of expressed genes coding for inflammatory and chemotactic molecules, transcription factors, apoptosis inhibition, glucose synthesis and heme metabolism. The findings presented in this work suggest that transcriptome dynamics of macrophages early during the first 24h post infection enable to identify novel key pathways deregulated upon L. major invasion. Our reported set of expressed genes will be useful in future rounds of data mining and functional analyses.
2015-12-31 | GSE43661 | GEO
Project description:Leishmania (L.) are obligated intracellular protozoan parasites that develop electively in macrophages. These cells that are acting as a safe shelter for the pathogens but also as their ultimate killer, making them the alpha and the omega during leishmaniasis diseases. Macrophages are able to secrete a remarkably diverse set of regulators known to influence the physiological functions and differentiation of neighboring cells to trigger an adaptive immune response of protective Th1-type cells, whereas parasites have developed a wide range of mechanisms to circumvent the hostâs immune responses. Most of our understanding of this host-parasite conflict, in the context of macrophage invasion by L. major metacyclic promastigotes, has been gleaned from studies investigating the macrophage responses at late and unique time points after infection. To investigate the dynamics of this duel, we have analyzed the transciptomic profile of monocyte-derived human macrophages at different time points during the first 24h upon in vitro infection using high throughput microarray platform. The gene expression profile of 17,838 genes showed high expression variability between the three human donors at different time points post infection. Cross comparison between the three donors allowed the identification of a common set of expressed genes coding for inflammatory and chemotactic molecules, transcription factors, apoptosis inhibition, glucose synthesis and heme metabolism. The findings presented in this work suggest that transcriptome dynamics of macrophages early during the first 24h post infection enable to identify novel key pathways deregulated upon L. major invasion. Our reported set of expressed genes will be useful in future rounds of data mining and functional analyses. In total 27 samples from three different donors were analyzed. For each donor, samples at 0h, 3h, 6h, 12h and 24h of culture were used as controls. For each donor, samples of cells infected with metacyclic Leishmania major parasites at 3h, 6h, 12h and 24h post-infection were analyzed.
2015-12-31 | E-GEOD-43661 | biostudies-arrayexpress
Project description:Monocyte derived dendritic cells (MDDC) were infected with Leishmania major parasites which were knockout mutants of either lpg1 or lpg2 genes that responsible for expression of surface molecular structures on the parasites in order to assess the effects those molecules have on human host cell gene expression. Monocyte derived dendritic cells (MDDC) were generated from blood buffy coats collected from four anonymous healthy human donors and infected 10:1 (parasite to host cell) with Leishmania major Friedlin V1 strain wildtype parasites and lipophosphogylcan mutants, where after total RNA was harvested, cDNA generated, and hybridized to human gene transcipt expression arrays to assess differential host cell gene transcriptional expression differences relative to uninfected cells. Please note that the final RMA normalized background value for each array was provided in the characteristics field and any data that was below the background value was filtered out.
2014-07-26 | E-GEOD-59766 | biostudies-arrayexpress
Project description:Monocyte derived dendritic cells (MDDC) were infected with Leishmania major or Leishmania donovani parasites and collected at 4, 8, and 24 hours post-infection to analyze the differential effects those parasite species have on human host cell gene expression over time. Monocyte derived dendritic cells (MDDC) were generated from blood buffy coats collected from five anonymous healthy human donors and infected 10:1 (parasite to host cell) with Leishmania major Friedlin V1 strain or Leishmania donovani 1S strain parasites, where after 4, 8, or 24 hours total RNA was harvested from cells, cDNA generated, and hybridized to human gene transcipt expression arrays to assess differential host cell gene transcriptional expression differences relative to uninfected cells.
2015-01-02 | E-GEOD-64610 | biostudies-arrayexpress
Project description:Global transcriptional profile of hESC-derived macrophage (iMAC), human monocyte-derived macrophage and THP-1 macrophage
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Project description:Preterm infants are highly susceptible to sustained lung inflammation, which may be triggered by exposure to multiple environmental cues such as supplemental oxygen (O2) and infections. The underlying mechanisms are still poorly understood. The hypothesis of this study is that dysregulated macrophage activation is a key feature leading to inflammation-mediated development of bronchopulmonary dysplasia (BPD) in preterm infants.
Cord blood samples of preterm infants (n=14) and term infants (n=19) as well as peripheral blood from healthy adults (n=17) were collected. Age-dependent differences in immune responses of monocyte-derived Mä from preterm infants were characterized and compared to term infants and adults after lipopolysaccharide (LPS) exposure.
| EGAS00001004974 | EGA
Project description:The human AA dataset 5 includes the gene expression profile of monocyte-derived macrophages isolated from blood donor buffy coats and plated on TCP in medium containing 10% autologous serum. Cells were stimulated for 120 hours with 50 ng/ml of IL-4, 50 U/ml of IFN-γ plus 12.5 ng/ml of TNF-α, 50 ng/ml of M-CSF or 50 ng/ml of IL-10. RNA samples were isolated using TriPure isolation reagent (Roche) and the RNeasy Mini Kit-Qiagen Clean up method. The transcriptional profile was evaluated in two independent cell preparations, each derived from a different single donor using the HT12 V4 R2 bead chip arrays from Illumina. Total RNA obtained from monocyte-derived macrophages exposed to representative polarizing cytokines
2013-07-26 | E-GEOD-49240 | biostudies-arrayexpress
Project description:In the context of studying visceral leishmaniasis, neutrophils infected with Leishmania donovani have been compared to uninfected neutrophils. Compared time points are 0, 6 and 24 hours post infection. Neutrophils of three human donors have been used. Overall 6 samples for infected neutrophils at time point 6 hours and 6 samples for infected neutrophils at time point 24 hours exist, including three biological samples and two technical samples. Uninfected neutrophils represent 3 samples at time point 0 hours, 3 samples at time point 6 hours and 3 samples at time point 24 hours. Transcriptome of Leishmania donovani culture has been assessed in two replicates.
| EGAS00001004912 | EGA
Project description:Arachidonic acid (AA) is a polyunsaturated fatty acid present at high concentrations in the ovarian cancer (OC) microenvironment and is associated with poor clinical outcome. In the present study, we elucidate a potential link between AA and pro-tumorigenic macrophage polarization. Methods: AA-triggered signal transduction was studied in primary monocyte-derived macrophages (MDMs) by phosphoproteomics, transcriptional profiling, measurement of intracellular Ca2+ accumulation and reactive oxygen species production in conjunction with bioinformatic analyses. Functional effects were investigated by actin filament staining, quantification of macropinocytosis and analysis of extracellular vesicle release. Results: We identified the ASK1 - p38 (MAPK13/14) axis as a central constituent of signal transduction pathways triggered by non-metabolized AA. This pathway was induced by the Ca2+-triggered activation of calmodulin kinase II, and to a minor extent by ROS generation in a subset of donors. Activated p38 in turn was linked to a transcriptional stress response associated with a poor relapse-free survival. Consistent with the phosphorylation of the p38 substrate HSP27 and the (de)phosphorylation of multiple regulators of Rho family GTPases, AA impaired actin filament organization and inhibited actin-driven macropinocytosis. AA also affected the phosphorylation of proteins regulating vesicle biogenesis, and consistently, AA enhanced the release of tetraspanin-containing exosomes. Finally, we identified phospholipase A2 Group 2A (PLA2G2A) as the clinically most relevant enzyme producing extracellular AA, providing further potentially theranostic options. Conclusion: Our results suggest that AA contributes to an unfavorable clinical outcome of OC by promoting the pro-tumorigenic phenotype of tumor-associated macrophages. Besides critical AA-regulated signal transduction proteins identified in the present study, PLA2G2A might represent a potential prognostic tool and therapeutic target to interfere with OC progression.
2020-10-05 | PXD021038 | Pride