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Gene expression profile of Endothelial colony-forming cells (ECFCs) isolated from patients with unprovoked venous thromboembolism (uVTE)

ABSTRACT: Anlysis of ECFCs isolated from uVTE patients at gene expression level. The hypothesis tested in the present study was that endothelial dysfunction could be involved in uVTE pathogenesis. Results provide important information on endothelial compartement of uVTE patients identifying either significantly up- and down regulated genes.

ORGANISM(S): Homo sapiens

PROVIDER: GSE118259 | GEO | 2018/08/08

REPOSITORIES: GEO

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Gene expression profile of Endothelial colony-forming cells (ECFCs) isolated from patients with unprovoked venous thromboembolism (uVTE)

Project description:Gene expression profile of Endothelial colony-forming cells (ECFCs) isolated from patients with unprovoked venous thromboembolism (uVTE)

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Project description:Endothelial colony-forming cells (ECFCs) have been reported as promising cells for regenerative medicine thanks to their angiorepair properties. Transcription factors are primary determinants of the functional capacity of the cells and TAL1 has been shown as a critical regulator of endothelial lineage in both development and adult life. However, only few (three) TAL1 targets have been identified so far in mouse and human endothelial cells. This microarray experiment, where TAL1 expression was knocked-down, was designed to identify TAL1-dependent genes in primary human endothelial stem/progenitor cells. ECFCs were isolated from three independent cord blood samples (n=3, biological replicates) and cultured in complete EGM-2 medium. The knockdown of TAL1 was induced by infection with lentiviruses expressing an anti-TAL1 shRNA. A scrambled shRNA was used as a negative control. Cells were then harvested for RNA extraction. DNA-free total RNA was isolated with RNeasy Mini Kit and hybridized to the Affymetrix Human Gene 1.0 ST gene expression microarray.

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Comparative analysis of TAL1 binding in TSA-treated versus non-treated Endothelial Colony Forming Cells (ECFCs)

Project description:Endothelial progenitors represent one of the most promising cell-based strategies for vascular repair of ischemic tissue damage, including limb ischemia, myocardial infarction and stroke. We have shown that the transcription factor TAL1 regulates a transcription program that drives the migration and adhesion of ECFCs. Furthermore, treatment of ECFCs with the HDAC inhibitor TSA increases the expression of TAL1-dependent genes and promotes the migration, chemotaxis and adhesion of ECFCs. Finally, ex vivo treatment with TSA also improves the vascular repair properties of ECFCs in vivo when these cells are transplanted in a mouse model of hindlimb ischemia. The goal of this experiment was to test whether TSA treatment of ECFCs affect TAL1 genomic binding. TAL1 ChIP-sequencing was performed from ECFCs that have been treated or not TSA. As negative controls, we performed Mock-ChIP-seq from the same samples using normal IgG instead of the TAL1 antibody. Overall, we find that there is no change in TAL1 genomic binding in ECFCs upon TSA treatment.

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Comparative analysis of TAL1 binding in TSA-treated versus non-treated Endothelial Colony Forming Cells (ECFCs)

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shRNA mediated knock-down of Tal1 in human Endothelial Colony Forming Cells (ECFCs)

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Human umbilical cord blood-derived endothelial colony forming cells under serum-free conditions

Project description:Derivation and expansion of human umbilical cord blood-derived endothelial colony forming cells under serum-free conditions - a transcriptome analysis. Endothelial colony forming cells (ECFCs) were isolated from term umbilical cord blood units. ECFCs were expanded under standard, fetal bovine serum (FBS) containing endothelial medium, or transferred to chemically defined endothelial media without FBS. Microarray expression profiling was applied to compare the transcriptome profiles in FBS-containing versus FBS-free culture. Comparison of the expression patterns of ECFCs that were either cultured in FBS-containing medium or in serum-free medium (five replicates each).

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Human umbilical cord blood-derived endothelial colony forming cells under serum-free conditions

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Genomic binding profile of TAL1 in human Endothelial Colony-Forming Cells

2014-05-06 | E-GEOD-44442 | biostudies-arrayexpress

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Project description:Endothelial progenitor cells (EPCs) are circulating endothelial precursors shown to incorporate into foci of neovascularisation. Herein, we describe phenotypic characteristics of an EPC sub-type called endothelial colony-forming cells (ECFCs). Peripheral blood-isolated ECFCs expressed endothelial and progenitor surface antigens and displayed cobblestone-patterned colonies with clonal proliferative and angiogenic capacities in vitro. ECFCs demonstrated endothelial cell-like shear stress responses including cell alignment and PECAM-1 expression. Proteomic comparison with an endothelial reference population (human umbilical vein endothelial cells) confirmed a similar proteomic profile. Hierarchical clustering revealed two distinct ECFC clusters with differences in cell growth, proliferation and angiogenesis capacities. The cluster with compromised functionality was also associated with elevated blood pressure and impaired lipid profile. Our findings described an endothelial-like phenotype of blood-derived ECFCs with distinctive proteomic signatures based on cellular and clinical characteristics. ECFCs may aid in identifying novel mechanisms associated with cardiovascular disease risk and new targets to enhance angiogenesis.

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