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RNA-seq of cultured human hematopoietic stem and progenitor cells from umblical cord blood in cytokine-rich ex vivo culture conditions following sphingolipid modulation

ABSTRACT: RNA-seq of cultured human hematopoietic stem and progenitor cells from umblical cord blood in cytokine-rich ex vivo culture conditions following sphingolipid modulation

PROVIDER: PRJNA515534 | ENA |

REPOSITORIES: ENA

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ATAC-seq of immunophenotypic LT-HSC and ST-HSC from umblical cord blood in cytokine-rich ex vivo culture conditions following sphingolipid modulation

Project description:ATAC-seq of immunophenotypic LT-HSC and ST-HSC from umblical cord blood in cytokine-rich ex vivo culture conditions following sphingolipid modulation

| PRJNA515533 | ENA

ATAC-seq and RNA-seq of cord blood cells in cytokine-rich ex vivo culture conditions following sphingolipid modulation

Project description:ATAC-seq and RNA-seq of cord blood cells in cytokine-rich ex vivo culture conditions following sphingolipid modulation

| PRJNA515532 | ENA

RNA-seq of cultured human hematopoietic stem and progenitor cells from umblical cord blood in cytokine-rich ex vivo culture conditions following sphingolipid modulation

Project description:To elucidate the biological pathways altered by sphingolipid modulation with N-(4-hydroxyphenyl) retinamide (4HPR) treatment in human HSPC that may contribute to the restraint in proliferation while promoting persistence of HSC self-renewal as well as determine the mechanism of synergy in enhancement of HSC self-renewal with CB CD34+ agonists UM171 and StemRegenin 1 (SR1), we performed RNA-sequencing (RNA-Seq) of 3 pools of lin-CB cells following 2 or 4 days with DMSO, 4HPR, UM171+SR1 or 3-Factor (4HPR+UM171+SR1). We identified modulation of sphingolipid metabolism regulates self-renewal through activating coordinated stress pathways that coalesce on endoplasmic reticulum stress and autophagy programs.

2019-11-19 | GSE125213 | GEO

ATAC-seq of immunophenotypic LT-HSC and ST-HSC from umblical cord blood in cytokine-rich ex vivo culture conditions following sphingolipid modulation

Project description:To investigate how ex vivo culture affects chromatin accessibility in cultured HSC, we performed the Assay for Transposase Accessible Chromatin with high-throughput sequencing (ATAC-Seq) on cLT (CD34+CD90+CD45RA-) and cST populations purified from 8 day cultured lineage depleted cord blood (lin- CB) cells treated with 3-Factor (4HPR+UM171+SR1), U+S or 4HPR as well as untreated and vehicle-treated (DMSO) control populations. The subsequent ATAC-seq data was compared to chromatin accessibility signatures generated from uncultured hematopoietic stem and progenitor populations (Takayama, et al.). We found that ex vivo culture shifted cLT and cST cells isolated from control or untreated samples to a chromatin accessibility profiles not found in LT-HSC, suggesting some loss of a stem-cell associated chromatin state. By contrast, 4HPR-treated, to some extent, and 3-Factor-treated HSC maintained chromatin accessibility features of uncultured LT-HSC.

2019-11-19 | GSE125212 | GEO

RNA-seq of cultured human hematopoietic stem and progenitor cells from umblical cord blood in cytokine-rich ex vivo culture conditions following sphingolipid modulation

| EGAS00001003756 | EGA

Proteomic and Phosphoproteomic Analyses of Yeast Reveal the Global Cellular Response to Sphingolipid Depletion

Project description:Sphingolipids are essential components of eukaryotic cells with important functions in membrane biology and cellular signaling. Their levels are tightly controlled and coordinated with the abundance of other membrane lipids. How sphingolipid homeostasis is achieved is not yet well understood. Studies performed primarily in yeast showed that the phosphorylation states of several enzymes and regulators of sphingolipid synthesis are important, although a global understanding for such regulation is lacking. Here, we used high-resolution mass-spectrometry-based proteomics and phosphoproteomics, in combination with data from a chemical genetic screen, to analyze the cellular response to sphingolipid synthesis inhibition. Our dataset reveals that changes in protein phosphorylation, rather than protein abundance, dominate the response to blocking sphingolipid synthesis. We identified Ypk1 signaling as a major pathway that is activated under these conditions, and we confirmed and identified Ypk1 targets. We also revealed key aspects of the cellular response to sphingolipid deprivation, including nodes that intersect with sterol metabolism and modification of lipid transport. Our data provide a rich resource for on-going mechanistic studies of key elements of the cellular response to the depletion of sphingolipid levels and the maintenance of sphingolipid homeostasis.

2016-12-23 | PXD003854 | Pride

ATAC-seq and RNA-seq of cord blood cells in cytokine-rich ex vivo culture conditions following sphingolipid modulation

Project description:This SuperSeries is composed of the SubSeries listed below.

2019-11-19 | GSE125214 | GEO

Proteomic changes to immune and inflammatory processes underlie lung preservation using ex vivo cytokine adsorption

Project description:The field of graft preservation has made considerable strides in recent years improving outcomes related to solid organ restoration and regeneration. In lungs, the use of ex vivo lung perfusion (EVLP) in line with devices and treatments has shown promising results within preclinical and clinical studies with the potential to improve graft quality. The benefit of the therapy would be to render marginal and declined donor lungs suitable for transplantation, ultimately increasing the donor pool available for transplantation. Additionally, such therapies used in machine perfusion could also increase preservation time, facilitating logistical planning. Cytokine adsorption has been demonstrated as a potentially safe and effective therapy when applied to the EVLP circuit and post transplantation. The mechanism by which this treatment improves the donor lung on a molecular basis is not yet fully elucidated. We hypothesized that there were characteristic inflammatory and immunomodulatory differences between lungs treated with and without cytokine adsorption, reflecting in proteomic changes in gene ontology pathways and across inflammation-related proteins. In the current study we investigate the molecular mechanisms and signaling pathways of how cytokine adsorption impacts the lung function when used during EVLP and when used post transplantation as hemoperfusion in a porcine model. Lung tissue from EVLP and post lung transplantation were analyzed for their proteomic profile using mass spectrometry. The inflammatory and immune processes were compared between the treated and the non-treated groups to show the differences occurring between the forms of graft preservation.

2023-10-24 | PXD044413 | Pride

sphingo-1-Identification of Sphingolipid regulated genes in cold stress response. Sphingolipids regulated genes.

Project description:rs07-05_sphingolipids-cold - sphingo-1 - The cold choc response seems to be partly triggered by Sphingolipid species. To date no gene response as been associated to sphingolipid signaling pathway in plant. Our aim is to identify among the cold induced genes the ones regulated by sphingolipids and to try to define a sphingolipid pathway specific group of genes. - 7ml of 5 days-old cells suspensions were incubated in presence of different sphingolipid pathway inhibitors, 30 min to 2 hours depending in the coumpound (all were resuspended in DMSO and control were done with DMSO). Then a 30 min cold choc was applied before cells were harvested and frozen in cold nitrogen. RNA were then extracted. FB1 and DMS were from Alexis , Myr from Cayman, TSP from matreya. 6 dye-swap - treated vs untreated comparison

2012-03-27 | E-GEOD-36659 | biostudies-arrayexpress

Transcriptional suppression of sphingolipid catabolism controls pathogen resistance in C. elegans [ChIP-Seq]

Project description:Sphingolipids are required for diverse biological functions and are degraded by specific catabolic enzymes. However, the mechanisms that regulate sphingolipid catabolism are not known. Here we characterize a transcriptional axis that regulates sphingolipid breakdown to control resistance against bacterial infection. From an RNAi screen for transcriptional regulators of pathogen resistance in the nematode C. elegans, we identified the nuclear hormone receptor nhr-66, a ligand-gated transcription factor homologous to human hepatocyte nuclear factor 4. Tandem chromatin immunoprecipitation-sequencing (ChIP-seq) and RNA sequencing (RNA-seq) experiments revealed that NHR-66 is a transcriptional repressor, which directly targets sphingolipid catabolism genes. Transcriptional de-repression of two sphingolipid catabolic enzymes in nhr-66 loss-of-function mutants drives the breakdown of sphingolipids, which enhances host susceptibility to infection with the bacterial pathogen Pseudomonas aeruginosa. These data define transcriptional control of sphingolipid catabolism in the regulation of cellular sphingolipids, a process that is necessary for pathogen resistance.

2023-09-08 | GSE240426 | GEO

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