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Single cell RNA-seq analysis of endothelial cells (HUVEC) treated with IL1b and TGFb2 as a model of endothelial to mesenchymal transition (EndMT)

ABSTRACT: Single cell RNA-seq analysis of endothelial cells (HUVEC) treated with IL1b and TGFb2 as a model of endothelial to mesenchymal transition (EndMT)

PROVIDER: PRJNA670667 | ENA |

REPOSITORIES: ENA

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Single cell RNA-seq analysis of endothelial cells (HUVEC) treated with IL1b and TGFb2 as a model of endothelial to mesenchymal transition (EndMT)

Project description:Endothelial-to-mesenchymal transition (EndMT) is a dynamic biological process involved in pathological vascular remodeling. However, the molecular mechanisms that govern this transition remain largely unknown. To study EndMT in vitro, human umbilical vein endothelial cells (HUVEC) were treated with transforming growth factor-β2 and interleukin-1β, leading to a decrease of endothelial markers as well as an increase of mesenchymal markers and EndMT regulators after 7 days. Single-cell RNA-seq was carried out to study the dynamics of the transition.

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Transcriptome changes during Endothelial to Mesenchymal Transition (EndMT) using a TGF-b2 and IL-1b in vitro model of EndMT in HUVEC and HPAEC

Project description:Endothelial-to-mesenchymal transition (EndMT) is a dynamic transformation process that has a functional impact upon pathological vascular remodelling. However, the molecular mechanisms that govern EndMT remain largely unknown. We modelled this process in vitro by exposing human primary endothelial cells to a combination of transforming growth factor-β2 (TGF- β2) and interleukin-1β (IL-1β). RNAseq was carried out to analyse the change of gene expression during the transition and define the transcriptional architecture of EndMT.

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Endothelial Cells from different anatomical origin have distinct responses during Snail/TGF-β2-mediated Endothelial-Mesenchymal Transition

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The histone demethylase JMJD2B regulates endothelial-to-mesenchymal transition [microarray]

Project description:Endothelial cells play an important role in maintenance of the vascular system and the repair after injury. Under pro-inflammatory conditions, endothelial cells can acquire a mesenchymal phenotype by a process named endothelial-to-mesenchymal transition (EndMT), which affects the functional properties of endothelial cells. Here, we investigated the epigenetic control of EndMT. We show that the histone demethylase JMJD2B is induced by EndMT promoting pro-inflammatory and hypoxic conditions. Silencing of JMJD2B reduced TGF-β2-induced expression of mesenchymal genes and prevented the alterations in endothelial morphology and impaired endothelial barrier function. Endothelial-specific deletion of JMJD2B in vivo confirmed a reduction of EndMT after myocardial infarction. EndMT did not affect global H3K9me3 levels but induced a site-specific reduction of repressive H3K9me3 marks at promoters of mesenchymal genes, such as Calponin (CNN1), and genes involved in TGF-β signaling, such as AKT Serine/Threonine Kinase 3 (AKT3) and sulfatase 1 (SULF1). Silencing of JMJD2B prevented the EndMT-induced reduction of H3K9me3 marks at these promotors and further repressed these EndMT-related genes. Our study reveals that endothelial identity and function is critically controlled by the histone demethylase JMJD2B, which is induced by EndMT-promoting pro-inflammatory and hypoxic conditions and support the acquirement of a mesenchymal phenotype.

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