Characterisation of human PSC-derived cardiovascular cell types
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ABSTRACT:
PROVIDER: PRJNA608877 | ENA |
REPOSITORIES: ENA
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Project description:Vascularization and maturation options for cardiac tissue engineered structures are currently intensively investigated. Therefore, the generation and characterisation of all cardiovascular cell types from human pluripotent stem cells (hPSC; either induced -iPSC- or embryonic -hESC) are of particular interest. In our group, differentiation and selection methods were described for obtaining highly pure hPSC-derived cardiomyocytes (CM; selected for αMHC), endothelial cells (EC; selected for CD31) and PDGFRβ expressing cardiac pericyte-like cells (PC). With the purpose of identifying cell type-related mechanisms in co-culture and tissue formation, gene expression profile of hPSC-derived CM, ECs, and PCs was compared to their undifferentiated progeny (hPSC) as well as to primary pericytes (hPC-PL) and fibroblasts (HFF).
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Project description:Cholangiocarcinomas (CCAs) are heterogeneous biliary cancers with dismal prognosis. Their etiologies remain mostly unclear, although primary sclerosing cholangitis (PSC) is a well-known risk factor. There is an urgent need of accurate non-invasive biomarkers for early CCA diagnosis and to predict patient´s prognosis, which may improve their clinical management and outcome. Here, by high-throughput proteomic analysis of serum extracellular vesicles (EVs), we identified diagnostic and/or prognostic biomarkers specific for CCAs in patients with PSC, and others common to all CCA subtypes. Bulk RNA tissue transcriptomic data revealed that these biomarkers are predominantly expressed in hepatobiliary tissues, being expressed in different liver cell types. Furthermore, single-cell RNAseq (scRNA-seq) analysis revealed that the expression of these biomarkers was preferentially found in malignant cholangiocytes within CCA tumors. In summary, these results highlight the potential of serum EVs to reflect cancer presence, especially for difficult-to-diagnose malignancies, including CCA."
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Project description:During embryogenesis, the cardiac cell fate is acquired as early as gastrulation. There is compelling evidence that embryonic stem cells (ESC) can recapitulate early steps in cardiogenesis. Identification from human pluripotent stem cells of early cardiovascular cell progenitors, at the origin of the first cardiac lineage, would shed light on human normal and pathological cardiogenesis and would pave the way toward cell therapy for cardiac degenerative diseases. Here, we report the isolation, and a phenotypic characterisation of an early Oct-4+, SSEA-1+, Mesp1+ population of cardiovascular progenitors derived from human pluripotent stem cells. This multipotential progenitor features the capability to generate cardiomyocytes as well as smooth muscle and endothelial cells. We further bring a proof of concept that these progenitors can be used in cardiac regenerative medicine as allografted in infarcted non human primate myocardium, they differentiate in ventricular myocytes without any adverse effect. One RNA sample from HUESC-POU5F1 was compared in dye-swap to undifferentiated HUESC. Three distinct RNA samples from BMP2-induced SSEA1+ cells were compared in dye-swap to paired remaining SSEA1-. Reference samples correspond to undifferentiated HUESC and to SSEA1 negative cells, respectively. population respectivement.
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Project description:During embryogenesis, the cardiac cell fate is acquired as early as gastrulation. There is compelling evidence that embryonic stem cells (ESC) can recapitulate early steps in cardiogenesis. Identification from human pluripotent stem cells of early cardiovascular cell progenitors, at the origin of the first cardiac lineage, would shed light on human normal and pathological cardiogenesis and would pave the way toward cell therapy for cardiac degenerative diseases. Here, we report the isolation, and a phenotypic characterisation of an early Oct-4+, SSEA-1+, Mesp1+ population of cardiovascular progenitors derived from human pluripotent stem cells. This multipotential progenitor features the capability to generate cardiomyocytes as well as smooth muscle and endothelial cells. We further bring a proof of concept that these progenitors can be used in cardiac regenerative medicine as allografted in infarcted non human primate myocardium, they differentiate in ventricular myocytes without any adverse effect.
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Project description:The vascular wall from diverse human organs is a source of mesenchymal progenitor cells that are able to induce skeletal repair, primarily by paracrine mechanisms. To investigate these paracrine mechanisms, FACS purified human perivascular stem cells (PSC) were observed to induce mitogenic, pro-migratory, and pro-osteogenic effects on osteoprogenitor cells while in non-contact co-culture, and did so via elaboration of extracellular vesicles (EVs). PSC-derived EVs shared mitogenic, pro-migratory, and pro-osteogenic properties of their parent cell. EVs represent a mixture of protein, lipid, and RNA that may affect cellular processes of the recipient cell. To begin to examine this, the RNA content of PSC-EVs was examined in comparison to the parent cell using total RNA sequencing.
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