Transcriptomic analyses of adipocyte differentiation from human mesenchymal stromal-cells (MSC)
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PROVIDER: PRJEB14691 | ENA |
REPOSITORIES: ENA
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Project description:Adipogenesis is a physiological process required for fat-tissue development, mainly involved in regulating the organism energetic-state. Abnormal distribution-changes and dysfunctions in such tissue are associated to different pathologies. Adipocytes are generated from progenitor cells, via a complex differentiating process not yet well understood. Therefore, we investigated differential mRNA and miRNA expression patterns of human mesenchymal stromal-cells (MSC) induced and not induced to differentiate into adipocytes by next (second)-generation sequencing. A total of 2,866 differentially-expressed genes (101 encoding miRNA) were identified, with 705 (46 encoding miRNA) being upregulated in adipogenesis. They were related to different pathways, including PPARG, lipid, carbohydrate and energy metabolism, redox, membrane-organelle biosynthesis and endocrine system. Downregulated genes were related to extracellular matrix and cell migration, proliferation and differentiation. Analyses of mRNA-miRNA interaction showed that repressed miRNA-encoding genes can act downregulating PPARG-related genes; mostly the PPARG activator (PPARGC1A). Induced miRNA-encoding genes regulate downregulated genes related to TGFB1. These results shed new light to understand adipose-tissue differentiation and physiology, increasing our knowledge about pathologies like obesity, type-2 diabetes and osteoporosis.
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Project description:The main goal of the present work was to use an in vitro adipogenic-differentiation mode, with mesenchymal stem-cells (MSC) from human bone-marrow, to study whole-transcriptomic differential gene-expression when such cells are induced to differentiate into adipocytes in absence or presence of oleuropein. See details below. This work is complementary to a previously published one (Casado-Daz et al, 2016): Casado-DÃaz, A., Anter, J., Müller, S., Winter, P., Quesada-Gómez, J. M. and Dorado, G. (2016): Transcriptomic analyses of adipocyte differentiation from human mesenchymal stromal-cells (MSC). Journal of Cellular Physiology 9999: 1-14. DOI: 10.1002/jcp.25472. It corresponds to EMBL-EBI ArrayExpress accession E-MTAB-4884.
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Project description:Mesenchymal stem/stromal cells (MSCs) are multipotent cells that can differentiate into a variety of cell types forming connective tissue and skeleton, and are essential participants in the development of all organs. However, MSC precursors remain largely unknown. In human embryonic stem cells (hESCs) directed to mesendodermal differentiation through coculture with OP9 stromal cells, we identified a population of mesodermal cells by surface expression of apelin receptor (APLNR1). APLNR+ cells were enriched with precursors generating compact spheroid colonies in semisolid suspension culture. Being formed by single cells, these colonies consisted of a uniform population of mesenchymal cells with a transcriptional profile representative of embryonic mesenchyme originating from lateral plate/extraembryonic mesoderm. Mesenchymal colony formation required serum-free medium and FGF2 as a colony-forming factor, could be significantly enhanced by PDGF-BB, but suppressed by VEGF. When transferred to the adherent cultures in serum-free medium with FGF2, individual colonies gave rise to multipotential mesenchymal cell lines with typical phenotype (CD146+CD105+CD73+CD31-CD43-CD45-), differentiation (chondro-, osteo-, and adipogenesis) and proliferation (>80 doublings) potentials. Consistent with lineage-restricted differentiation pattern, neither endothelial nor hematopoietic cells could be produced from adherent mesenchymal cultures, however endothelial cells could be derived from mesenchymal colonies in the early days of colony-forming culture suggesting that mesenchymal cells arose from cells with primary angiogenic potential (mesangioblasts). Together these studies identified mesangioblasts as the earliest clonogenic mesenchymal precursors at this stage of their specification from mesoderm. This set (11 samples) of expression data is sequential stages of MSC development from hESCs (H1), namely ALPNR+ mesodermal precursors isolated on day 2 and day 3 differentiation, mesangioblast (MB) cores (Day 2 H1-derived cores), hemangioblast (HB) cores (day 3 H1-derived cores), mesangioblast (MB) and hemangioblast (HB) colonies, and colony-derived MSC lines at passage 1 and 5.
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Project description:Human bone marrow mesenchymal stromal cells (BM-MSC) could be committed toward a functional lymphoid-like stroma by a combination of TNFalpha (TNF) and Lymphotoxin alpha1/beta2 (LT) (Amé-Thomas et al Blood 2007). Bone marrow and lymph node stromal cells support FL malignant cell recruitment and growth in particular after comittment to a lymphoid-like differentiation in vitro. In addition, more than 70% of FL patients exhibit a bone marrow involvment at diagnosis. We delineate using Affymetrix U133+2.0 microarrays the gene expression profile of BM-MSC obtained from FL patients (FL-MSC) and age-matched healthy donors (HD-MSC) in order to identify a specific FL-MSC signature. In addition, we used Affymetrix microarrays to define the gene expression signature of lymphoid-like stromal cells obtained from HD-MSC by treatment with TNF/LT in vitro. This TNF/LT signature was then used to interpret the gene expression profile of FL-MSC. GEP was performed on 10 BM-MSC from FL patients and 6 from healthy donors, treated or not with TNF(10 ng/mL)/LT(100ng/mL)
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