Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Ezh2 is essential for the generation of functional yolk sac derived erythro-myeloid progenitors [ATAC-seq]

ABSTRACT: Yolk sac (YS) hematopoiesis is critical for the survival of the embryo and a major source of tissue-resident macrophages that persist into adulthood. Here we report that the epigenetic regulator Ezh2 is essential for YS hematopoiesis but dispensable for subsequent aorta–gonad–mesonephros (AGM) blood development. Loss of Ezh2 activity in hemogenic endothelium (HE) leads to the generation of phenotypically intact but functionally deficient erythro-myeloid progenitors (EMP). Ezh2 activity is critical at the onset of the endothelial-to-hematopoietic transition generating EMPs but rapidly dispensable after that. We identified a lack of downregulation of Wnt signaling as the primary reason in the generation of non-functional EMPs. Together, our findings demonstrate a critical and specific role of Ezh2 in modulating Wnt signaling during the generation of EMPs from YS HE.

ORGANISM(S): Mus musculus

PROVIDER: GSE150292 | GEO | 2021/06/01

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Similar Datasets

Ezh2 is essential for the generation of functional yolk sac derived erythro-myeloid progenitor [CUT&RUN]

Project description:Yolk sac (YS) hematopoiesis is critical for the survival of the embryo and a major source of tissue-resident macrophages that persist into adulthood. Here we report that the epigenetic regulator Ezh2 is essential for YS hematopoiesis but dispensable for subsequent aorta–gonad–mesonephros (AGM) blood development. Loss of Ezh2 activity in hemogenic endothelium (HE) leads to the generation of phenotypically intact but functionally deficient erythro-myeloid progenitors (EMP). Ezh2 activity is critical at the onset of the endothelial-to-hematopoietic transition generating EMPs but rapidly dispensable after that. We identified a lack of downregulation of Wnt signaling as the primary reason in the generation of non-functional EMPs. Together, our findings demonstrate a critical and specific role of Ezh2 in modulating Wnt signaling during the generation of EMPs from YS HE.

2021-08-16 | GSE181869 | GEO

Ezh2 is essential for the generation of functional yolk sac derived erythro-myeloid progenitors [RNA-seq]

2021-08-16 | GSE150032 | GEO

C-Myb+ erythro-myeloid progenitor-derived fetal monocytes give rise to adult tissue-resident macrophages

Project description:Although classified as hematopoietic cells, tissue-resident macrophages are selfrenewing and maintained independently of adult hematopoiesis. While most macrophages originate from embryonic precursors that seed tissues prior to birth, their exact origin is unknown. Using an in utero macrophage depletion strategy and fatemapping of yolk sac (YS) and fetal liver (FL) hematopoiesis, we found that YS macrophages are the main precursors of microglia, while most other macrophages derive from fetal monocytes. Both YS macrophages and fetal monocytes arise from erythro-myeloid progenitors (EMP) generated in the YS. In the YS, EMP gave rise to macrophages without monocytic intermediates, while EMP seeding the FL upon the establishment of blood circulation acquired c-Myb expression and gave rise to fetal monocytes that then seed embryonic tissues to differentiate into macrophages. Thus, adult tissue-resident macrophages established from HSC-independent embryonic precursors arise from two different developmental programs.

2015-04-23 | GSE66970 | GEO

C-Myb+ erythro-myeloid progenitor-derived fetal monocytes give rise to adult tissue-resident macrophages

2015-04-23 | E-GEOD-66970 | biostudies-arrayexpress

Single-cell RNA sequencing of Cd45+ adventitial cells from mice at steady state or treated with AngiotensinII

Project description:Here we show, that arterial macrophages derive predominantly from YS EMPs, which give rise to a transcriptionally distinct cluster of macrophages with mainly homeostatic and anti-inflammatory properties in steady state as well as in response to AngII inflammation. In adult mice, these EMP-derived macrophages persist for long periods of time, but decreas in absolute numbers in senescence without compensation by BM-derived progenitors. EMP-derived macrophages expressed high levels of homeostatic genes such as Lyve-1, which links them to physiological functions in arteries.

2020-08-04 | GSE155569 | GEO

Requisite chromatin remodeling for myeloid and erythroid lineage differentiation from erythromyeloid progenitors

Project description:The mammalian SWI/SNF chromatin-remodeling BAF (BRG1/BRM-associated factor) complex has an essential role in developmental and pathological processes. We show that deletion of Baf155 encoding a subunit of the BAF complex in the Tie2(+) lineage (Baf155 CKO) leads to defects in yolk sac myeloid and definitive erythroid (EryD) lineage differentiation from erythromyeloid progenitors (EMPs). The chromatin of myeloid gene loci in Baf155 CKO EMPs is mostly inaccessible and enriched mainly by the ETS binding motif. BAF155 interacts with PU.1 and is recruited to PU.1 target gene loci together with p300 and KDM6a. Treatment of Baf155 CKO embryos with GSK126, an H3K27me2/3 methyltransferase EZH2 inhibitor, rescues myeloid lineage gene expression. This study uncovers indispensable BAF-mediated chromatin remodeling of myeloid gene loci at the EMP stage. Future studies exploiting epigenetics in generation and application of EMP derivatives for tissue repair, regeneration, and disease are warranted.

2020-11-17 | GSE144243 | GEO

A human iPSC-derived multilineage liver organoid model containing Kupffer cells to study human sepsis-associated liver dysfunction [hiPSC-EMP-KC-pKC]

Project description:To incorporate Kupffer cells into hiPSC-LOs, we differentiated erythro-myeloid progenitors (EMPs) from hiPSCs. We compares the gene expression profiles of hiPSC-EMPs with cord-blood hematopoietic stem and progenitor cells (CB-HSPCs); and EMP-generated Kupffer cells (EMP-KC) with human primary Kupffer cells.

2024-03-01 | GSE233538 | GEO

Requisite chromatin remodeling for myeloid and erythroid lineage differentiation from erythromyeloid progenitors

Project description:The mammalian SWI/SNF chromatin-remodeling BAF (BRG1/BRM associated factor) complex plays an essential role in developmental and pathological processes. We show that the deletion of Baf155 encoding a subunit of BAF complex in the Tie2(+) lineage (Baf155 CKO) leads to defects in the yolk sac myeloid and definitive erythroid (EryD) lineage differentiation from erythromyeloid progenitors (EMPs) and embryonic lethality. Baf155 knock-down in EMP was sufficient to block myeloid and EryD differentiation. Chromatin of the myeloid gene loci in Baf155 CKO EMPs was largely inaccessible and was enriched mostly by the ETS binding motif. BAF155 interacted with PU.1 and was recruited to the PU.1 in target gene loci together with p300 and KDM6a. Treatment of Baf155 CKO embryos with GSK126, an inhibitor of the H3K27me2/3 methyltransferase EZH2, rescued myeloid lineage gene expression. These studies uncover the indispensable BAF mediated chromatin remodeling of the myeloid gene loci at the EMP stage.

2021-03-08 | GSE159381 | GEO

Erythro-myeloid progenitors contribute endothelial cells to developing blood vessels

Project description:The earliest blood vessels in the mammalian embryo are formed when endothelial cells (ECs) differentiate from angioblasts and coalesce into tubular networks. Thereafter, the en-dothelium is thought to expand solely by proliferation of pre-existing ECs. Here we show that the earliest precursors of erythrocytes, megakaryocytes and macrophages, the yolk sac-derived erythro-myeloid progenitors (EMPs), provide a complementary source of ECs that are recruited into pre-existing vasculature. Whereas a first wave of yolk sac-resident EMPs contributes ECs to the yolk sac endothelium, a second wave of EMPs colonises the embryo and contributes ECs to intraembryonic endothelium in multiple organs, where they persist into adulthood. By demonstrating that EMPs constitute a hitherto unrecognised source of ECs, we reveal that embryonic blood vascular endothelium expands in a dual mechanism that involves both the proliferation of pre-existing ECs and the incorporation of ECs derived from hematopoietic precursors.

2018-08-02 | GSE117978 | GEO

Robust hematopoietic stem cell activity is derived from pre-circulation embryos but not yolk sacs

Project description:The embryonic site of definitive hematopoietic stem cell (dHSC) origination has been debated for decades. Although an intra-embryonic origin is supported, recent data suggest that a large fraction of adult blood derives from the yolk sac (YS). Investigating the origins of hematopoiesis before heartbeat onset (i.e. 5-7 somite pairs (sp)) is precluded by a lack of assays that can distinguish dHSC precursors in early embryos. Here, we report robust, multi-lineage and serially transplantable dHSC activity from cultured 2-7sp murine embryonic explants (Em-Ex). dHSC were undetectable in 2-7sp YS explants (YS-Ex). Our work supports a model in which the embryo, not the YS, is the major source of lifelong hematopoiesis.

2018-11-13 | GSE110909 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data