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A trio of bipotent precursors seeds the mesenchymal, haematopoietic, and endothelial lineages of the yolk sac

ABSTRACT: A trio of bipotent precursors seeds the mesenchymal, haematopoietic, and endothelial lineages of the yolk sac

PROVIDER: PRJNA842683 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR19417261_1.fastq.gz	Fastqsanger.gz
	SRR19417261_2.fastq.gz	Fastqsanger.gz

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A trio of bipotent precursors seeds the mesenchymal, haematopoietic, and endothelial lineages of the yolk sac

Project description:During embryogenesis, haematopoietic and endothelial lineages emerge closely in time and space. It is thought that the first blood and endothelium derive from a common clonal ancestor, the haemangioblast. However, investigation of candidate haemangioblasts in vitro has revealed a mesenchymal differentiation potential, a feature more compatible with an earlier mesodermal precursor. To date, no evidence for an in vivo haemangioblast has been discovered. Using single cell RNA-Sequencing and in vivo cellular barcoding, we have unraveled the ancestral relationships that give rise to the haematopoietic lineages of the yolk sac, the endothelium, and the mesenchyme. We show that the mesodermal derivatives of the yolk sac are produced by three distinct bipotential precursors: the haemangioblast, mesenchymoangioblast, and a novel cell type: the haematomesoblast. Between E6.5 and E7.5, this trio of precursors seeds haematopoietic, endothelial, and mesenchymal trajectories.

2022-12-21 | GSE204896 | GEO

In vivo clonal tracking reveals evidence of haemangioblast and haematomesoblast contribution to yolk sac haematopoiesis

Project description:During embryogenesis, haematopoietic and endothelial lineages emerge closely in time and space. It is thought that the first blood and endothelium derive from a common clonal ancestor, the haemangioblast. However, investigation of candidate haemangioblasts in vitro revealed the capacity for mesenchymal differentiation, a feature more compatible with an earlier mesodermal precursor. To date, no evidence for an in vivo haemangioblast has been discovered. Using single cell RNA-Sequencing and in vivo cellular barcoding, we have unraveled the ancestral relationships that give rise to the haematopoietic lineages of the yolk sac, the endothelium, and the mesenchyme. We show that the mesodermal derivatives of the yolk sac are produced by three distinct precursors with dual-lineage outcomes: the haemangioblast, the mesenchymoangioblast, and a previously undescribed cell type: the haematomesoblast. Between E5.5 and E7.5, this trio of precursors seeds haematopoietic, endothelial, and mesenchymal trajectories.

2022-12-21 | GSE164336 | GEO

Expression data from Tnrc6a (GW182) mutant yolk sac

2011-09-01 | GSE30244 | GEO

Expression data from Tnrc6a (GW182) mutant yolk sac

Project description:GW182 (Tnrc6a) is a key component of RISC (miRNA-Induced Silencing Complex) that plays a critical role in miRNA-mediated gene silencing. Here, we show that GW182 is expressed in the yolk sac endoderm, and that gene-trap disruption of GW182 leads to growth arrest of yolk sac endoderm, impaired hematopoiesis and embryonic lethality. To investigate roles of GW182 in the yolk sac endoderm, we assessed changes in mRNA expression in the yolk sac of E9.5 GW182gt/gt embryos using microarrays (Affymetrix). Yolk sac of wild type littermates and GW182gt/gt embryos at E9.5 was collected for total RNA isolation using Trizol (Invitrogen). RNAs were purified according to the manufacturer’s protocol before subjected to Mouse Gene 1.0 ST Whole Genome Array (Affymetrix) for mRNA expression profiling. Experiments were performed in triplicate. Differentially expressed mRNAs were identified using a two-sample t-test (P<0.05 considered significant).

2011-08-31 | E-GEOD-30244 | biostudies-arrayexpress

Human yolk sac-like haematopoiesis generates RUNX1-, GFI1- and/or GFI1B-dependent blood and SOX17-positive endothelium

Project description:The genetic regulatory network controlling early fate choices during human blood cell development are not well understood. We use human pluripotent stem cell reporter lines to track the development of endothelial and haematopoietic populations in an in vitro model of human yolk-sac development. We identified SOX17-CD34+CD43- endothelial cells at day 2 of blast colony development, as a haemangioblast-like branch point from which SOX17-CD34+CD43+ blood cells and SOX17+CD34+CD43- endothelium subsequently arose. Most human blood cell development was dependent on RUNX1. Deletion of RUNX1 only permitted a single wave of yolk sac-like primitive erythropoiesis, but no yolk sac myelopoiesis or aorta-gonad-mesonephros (AGM)-like haematopoiesis. Blocking GFI1/1B activity with a small molecule inhibitor abrogated all blood cell development, even in cell lines with an intact RUNX1 gene. Together, our data defines the hierarchical requirements for both RUNX1 and GFI1/1B during early human haematopoiesis arising from a yolk sac-like SOX17- haemogenic endothelial intermediate.

2020-11-11 | GSE124085 | GEO

Human yolk sac-like haematopoiesis generates RUNX1-, GFI1- and/or GFI1B-dependent blood and SOX17-positive endothelium

2020-11-11 | GSE124084 | GEO

The role of the yolk sac in human fetal development and identification of a hepatocyte-like cell in the human yolk sac

Project description:The human yolk sac (YS) is an extra-embryonic tissue critical for early prenatal life development. It is the first site of haematopoiesis where progenitors differentiate from endoderm within blood islands of the yolk sac contributing initially to primitive erythropoiesis and in subsequent waves to erythro-myeloid and lymphoid differentiation.

2023-03-01 | E-MTAB-10552 | biostudies-arrayexpress

The role of the yolk sac in human fetal development and identification of a hepatocyte-like cell in the human yolk sac (SS2)

2023-03-01 | E-MTAB-10888 | biostudies-arrayexpress

Expression anlysis of E10.5 yolk sac and E13.5 liver lineages from the wildtype mouse embryo

Project description:Single cell suspensions of E10.5 yolk sac cells and E13.5 fetal liver cells were purified by flow cytometry into the following immunophenotypically defined populations: (A) E10.5 diploid platelet-forming cells (megakaryocytic lineage, CD45-CD144-CD41high), E10.5 haematopoietic progenitor cells (CD45+CD41low), E10.5 myeloid cells (CD45+CD41low), and E10.5 endothelium (CD45-CD144+CD41-); and, (B) E13.5 megakaryocytes (CD61-enriched CD41+CD150+CD42D+), myeloid cells (CD45+CD11B+), and blast cells (CD45+CD11B-).

2014-07-27 | E-MTAB-2625 | biostudies-arrayexpress

Human fetal yolk sac scRNA-seq data (sample ID: F158 for Haniffa Lab; 16099 for HDBR)

Project description:Investigating the blood, immune and stromal cells present in a human fetal embryo in a world first single cell transcriptomic atlas. The embryo was dissected into 12 coronal sections, yolk sac, and yolk sac stalk. Live single cells sorted, with cell suspension then undergoing 10x chromium 5 prime scRNA-seq. This accession contains the yolk sac and yolk sac stalk data from this embryo. A matched accession contains the coronal section data. Lane "WS_wEMB12142156" (from yolk sac) was excluded from downstream analysis due to low fraction reads in cells post-CellRanger QC. Termination procedure for this embryo was medical. The F158_[features...barcodes...matrix].[tsv...mtx].gz files attached to this accession represent raw count data from all the 10x lanes in this accession combined, and as output from CellRanger filtered matrices (CellRanger version 6.0.1 using human reference genome GRCh38-2020-A). One set of count matrices relates to the yolk sac data, and one set of count matrices relates to the yolk sac stalk data.

2022-12-07 | E-MTAB-11673 | biostudies-arrayexpress

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