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MiRNA array to determine changes in sEV miRNA cargo composition in endothelial cells during inflammatory response

ABSTRACT: We performed miRNA micro array to asses the miRNA profile differences in sEVs during inflammation vs. homeostatic conditions in endothelial cells. Therefore HUVEC cells were treated with a polytrauma cocktail comprised of IL1ß, IL6, CXCL8, C3a and C5a-des-Arg (PTC) at concentrations measured in patient serum 24hrs after polytrauma

ORGANISM(S): Homo sapiens

PROVIDER: GSE172211 | GEO | 2021/04/17

REPOSITORIES: GEO

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Whole transcriptome analysis of endothelial cells (HUVECs) after treatment with plasma-sEVs from polytrauma patients

Project description:To assess inflammation associated gene expression in endothelial cells mediated by small extracellular vesicles (sEVs), HUVECs were treated for 8hrs with plasma-Evs isolated from polytrauma patients 4 and 24hrs after trauma and healthy probands.

2021-04-17 | GSE172210 | GEO

2,2'4,4'-Tetrabromodiphenyl Ether (PBDE-47) Modulates the Intracellular miRNA Profile, sEV Biogenesis and Their miRNA Cargo Exacerbating the LPS-Induced Pro-Inflammatory Response in THP-1 Macrophages.

Project description: Not available

| S-EPMC8138315 | biostudies-literature

Unbiased miRNA screening analysis on myo-sEVs derived from Nor or HG/HL

Project description:The current study aims were to determine the differential expression of Myo-sEVs derived from normal or HG/HL.Mouse primary myocardial cells were isolated and cultured in normal and HG/HL culture medium. Myo-sEVs were separated by ultracentrifugation.Differential myo-sEVs-miRNA expression obtained through Unbiased miRNA array analysis.

2024-02-07 | E-MTAB-13736 | biostudies-arrayexpress

Proteomic characterization of SEC-fractionated sEV subpopulations

Project description:The use of cardiac progenitor cell (CPC)-derived small extracellular vesicles (sEVs) has shown potential to stimulate cardiac repair. sEVs are released by cells and play a role in intercellular communication through transfer of their bioactive content. Increasing evidence indicates that sEVs present a heterogeneous population of vesicles. In the context of cardiac regeneration, studying sEV heterogeneity could provide new insights into mechanisms underlying sEV-mediated cardiac repair properties and help to improve the therapeutic application of CPC-derived sEVs. Here we used size-exclusion chromatography to isolate and fractionate EV subpopulations dervied from CPCs. We then applied a bottom-up proteomic approach to characterize the contents of individual EV subpopulations.

2024-01-26 | PXD032334 | Pride

Whole transcriptome analysis of lung tissue from mice after thoraxtrauma with and without sEV biogenesis inhibitor GW4869

Project description:To assess trauma associated gene expression signatures in lungs after thorax trauma mediated by small extracellular vesicles (sEVs) total RNA was isolated from lung lysates of mice after experimental blunt chest trauma with/without intravenous injection of GW4869 (2µg/g body weight).

2021-04-17 | GSE172209 | GEO

Whole transcriptome analysis of endothelial cells (HUVECs) after treatment with plasma-sEVs from polytrauma patients

Project description:Whole transcriptome analysis of endothelial cells (HUVECs) after treatment with plasma-sEVs from polytrauma patients

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Xeno-free cultured Mesenchymal Stromal Cells release Extracellular Vesicles with a “therapeutic” miRNA cargo ameliorating cartilage inflammation in vitro

Project description:Mesenchymal Stromal Cells (MSCs)-derived Extracellular Vesicles (EVs) emerged as an innovative strategy for the treatment of osteoarthritis (OA). Biological activity of EVs is generally driven by their cargo, which might be influenced by microenvironment. Therefore, pre-conditioning strategies, including modifications in culture conditions or oxygen tension could directly impact on MSCs paracrine activity. Methods: A xeno-free supplement (XFS) was used for isolation and expansion of MSCs and compared to conventional fetal bovine serum (FBS) culture. Bone Marrow-derived MSCs (BMSCs) were pre-conditioned under normoxia (20% O2) or under hypoxia (1% O2) and EVs production was evaluated. Anti-OA activity was evaluated by using an in vitro inflammatory model. miRNA content was also explored, to select putative miRNA that could be involved in a biological function. Results: Modulation of IL-6, IL-8 and COX-2 was evaluated on hACs simultaneously treated with IL-1α and BMSC-derived EVs. FBS-sEVs exerted a blunt inhibitory effect, while a strong anti-inflammatory outcome was achieved by XFS-sEVs. Interestingly, in both cases hypoxia pre-conditioning allowed to increase EVs effectiveness. Analysis of miRNA content showed the upregulation in XFS-hBMSC-derived EVs of miRNA known to have a chondroprotective role, such as let-7b-5p, miR-17, miR-145, miR-21-5p, miR-214-3p, miR-30b-5p, miR-30c-5p. Activated pathways and target genes were investigated in silico and most of the upregulated miRNAs were found to be involved in TGF-beta and Wnt signalling pathways, by targeting genes related to cartilage homeostasis. Conclusions: XFS medium was found to be suitable for isolation and expansion of MSCs, secreting EVs with a therapeutic cargo. The application of cells cultured exclusively in XFS overcomes issues of safety associated with serum-containing media and makes ready-to-use clinical therapies more accessible.

2023-02-28 | GSE209585 | GEO

miRNA expression profile from Adipocyte-derived Small Extracellular Vesicles from the Serum and cerebrospinal fluid of Alzheimer Disease Patients and Controls

Project description:Midlife obesity increases the risk of developing AD. Adipocyte-derived small extracellular vesicles (ad-sEVs) have been implicated as a mecha-nism in several obesity-related diseases. We hypothesized that ad-sEVs from patients with AD would contain miRNAs predicted to downregulate pathways involved in synaptic plasticity and memory formation. We isolated ad-sEVs from the serum and cerebrospinal fluid (CSF) of patients with AD and controls and compared miRNA expression profiles

2023-09-12 | GSE242923 | GEO

Transcriptional profiling of mouse germinal center B cells (B220+, GL7+, CD95+) isolated from GC-specific (Cg1-Cre) DAF-TM transgenic or control mice

Project description:Germinal centers (GCs) support diversification and affinity maturation of antibody repertoires through iterative cycles of T-cell-dependent positive selection, B cell clonal expansion and antigen-receptor hypermutation. Positive selection is critical for efficient affinity maturation and depends on only partially understood signaling processes. We show that BCL6-dependent physiological repression of decay accelerating factor (DAF/CD55) on GC B cells is critical for effective positive selection and affinity maturation during GC responses. Absence of DAF on GC B cells lifts restraint on local complement activation, yielding autocrine C3a/C5a-receptor signaling that is indispensable for CD40-dependent mTOR pathway activation during positive selection. Genetic disruption of this pathway causes premature GC collapse and impairs affinity maturation. These results identify previously undiscerned targets to therapeutically manipulate protective and potentially injurious humoral immune responses.

2021-03-22 | GSE148570 | GEO

Acute and chronic liver injury change the small RNA cargoes carried by serum small extracellular vesicles in mice

Project description:Compared to whole serum miRNAs, miRNAs in serum small extracellular vesicles (sEVs) are well protected form RNA enzymes, thus provide a consistent source of miRNA for disease biomarker detection. Serum sEVs and their miRNA cargos released by injured liver cells could be promising biomarkers for diagnosis of liver diseases. We were very interested to find out the effects of liver injury on serum extracellular vesicles as well as the small RNA components they transported, if there is any difference between acute and chronic injury. Study in this regard will help us to identify new serum biomarkers for liver injury, and to find out if there are specific markers for acute or chronic liver injury. To identify potential biomarker for liver injury based on serum sEVs miRNAs, we established the carbon tetrachloride (CCL4) induced acute and chronic liver injury mice model, and examined the dynamic changes of small RNA components, especially miRNAs, in serum sEVs.

2021-08-07 | E-MTAB-9462 | biostudies-arrayexpress

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