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Single cell transcriptomes of cord blood derived subsets of human haematopoietic stem cells, LMPP and MLP myelo-lymphoid restricted progenitors [49f+ HSCs, 49f+ Subset1, 49f+ Subset2, Subset1, Subset2]

ABSTRACT: Single cell transcriptomes of cord blood derived subsets of human haematopoietic stem cells, LMPP and MLP myelo-lymphoid restricted progenitors [49f+ HSCs, 49f+ Subset1, 49f+ Subset2, Subset1, Subset2]

PROVIDER: PRJNA414392 | ENA |

REPOSITORIES: ENA

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Single cell transcriptomes of cord blood derived subsets of human haematopoietic stem cells, LMPP and MLP myelo-lymphoid restricted progenitors [49f+ HSCs, 49f+ Subset1, 49f+ Subset2, Subset1, Subset2]

Project description:Integration of index sorting and single cell functional assays allowed identification of novel haematopoietic stem cell (HSC) and multiprogenitor subsets (MPP) that differ in their lineage differentiation potential in vitro and in vivo, cell cycle properties and long-term repopulation capacity in the NSG xenograft model. Here we report single cell transcriptomes of CD49f+ HSCs as well as those of CD49f+ Subset1 (CD19- CD38- CD45RA- CD90+ CD49f+ CD34lo CLEC9Ahi, Myelo-erythroid-skewed in vitro but Lymphoid-competent) and CD49f+ Subset2 cells (CD19- CD38- CD45RA- CD90+ CD49f+ CD34hi CLEC9Alo, Myelo-Lymphoid competent but Erythroid-deficient). We also report bulk transcriptomes of pools of 20 cells from HSC/MPP Subset1 (CD19- CD38- CD45RA- CD34lo CLEC9Ahi) and HSC/MPP Subset2 (CD19- CD38- CD45RA- CD34hi CLEC9Alo). Altogether these data show a diffuse transcriptional landscape of the CD49f+ HSC compartment, which is polarised along an axis that separates Myelo-Erythroid and Myelo-Lymphoid lineage-priming. Consistently with their differentiation capacity in vitro, CD49f+ Subset1 cells cluster at the Myelo-Erythroid end of the landscape, while CD49f+ Subset2 cells cluster at the Myelo-Lymphoid end. In addtion, these lineage-priming signatures were found to be more marked in HSC/MPP Subset1 and HSC/MPP Subset2, than in the equivalent CD49f+ subsets. In conclusion, 49f+ Subset1 and 49f+ Subset2 populations have activated distinct transcriptional lineage-priming programmes corresponding to the phenotypic lineage-skewing observed in vitro, that then become reinforced within the broader HSC/MPP pool. Altogether our data shows that lineage-priming and lineage-restriction programmes are initially established within the CD49f+ HSC subset in humans.

2018-09-14 | GSE104995 | GEO

Transcriptome of cord blood derived subsets of human haematopoietic stem cells, LMPP and MLP myelo-lymphoid restricted progenitors [49f+ Subset2, Subset2, LMPPs, MLPs]

2018-09-14 | GSE115639 | GEO

Single cell transcriptomes of cord blood derived subsets of human haematopoietic stem cells, LMPP and MLP myelo-lymphoid restricted progenitors

Project description:Single cell transcriptomes of cord blood derived subsets of human haematopoietic stem cells, LMPP and MLP myelo-lymphoid restricted progenitors

| PRJNA476098 | ENA

Transcriptome of cord blood derived subsets of human haematopoietic stem cells, LMPP and MLP myelo-lymphoid restricted progenitors [49f+ Subset2, Subset2, LMPPs, MLPs]

Project description:Transcriptome of cord blood derived subsets of human haematopoietic stem cells, LMPP and MLP myelo-lymphoid restricted progenitors [49f+ Subset2, Subset2, LMPPs, MLPs]

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Single Cell RNA sequencing analysis of human haemopoietic lympho-myeloid progenitor populations (LMPP, MLP and GMP)

Project description:We performed single cell RNA sequencing of human haemopoietic lympho-myeloid progenitors with the aim to separate functionally and transcriptionally distinct progenitors within the heterogeneous GMP, LMPP and MLP populations. We performed RNA sequencing in a total of 415 single cells. From donors 1 (CB369) and 2 (CB431), 163/166 and 157/249 cells passed quality control.We further analysed the 320 single cells that passed quality control from two different donors (157 and 163 from each donor; 91 LMPP, 110 MLP and 119 GMP). We performed clustering using Seurat package, which identified 3 clusters of cells. We identified genes that were differentially expressed among cells of the different clusters. The majority of the cells in cluster 1 were MLP, the majority of cluster 3 were GMP while cluster comprised of LMPP and GMP cells. Cluster 1 showed high expression of lymphoid-affiliated genes. Conversely, cluster 3 showed increased expression of myeloid genes, while cluster 2 showed a mixed transcriptional signature. PCA analysis revealed a transcriptional continuum of LMPP, MLP and GMP populations.

2017-11-11 | GSE100618 | GEO

Landscape of m6A modification in haematopoietic system unveils an essential role of IGF2BP2 in preserving haematopoietic stem cell function

Project description:N6-methyladenosine (m6A) is an abundant modification on mRNA, and plays critical functions in various cellular processes, including cell fate determination and lineage transition. However, the landscape and dynamics of m6A modification in haematopoietic system remain unknown. Here, we delineate a comprehensive m6A landscape across haematopoietic hierarchy and uncover that IGF2BP2 is required for preserving haematopoietic stem cells (HSCs) function. Our data reveal a marked cell-type- and haematopoietic-lineage-specific m6A landscape. Intriguingly, most m6A modifications arise in the early stat of haematopoiesis, and are critical in defining cellular states of HSCs. Moreover, m6A modification is the major factor in determining mRNA abundance in HSCs. Importantly, we find that higher expression of m6A reader IGF2BP2 is critical in controlling gene expression states and the functional maintenance of HSCs. IGF2BP2 deficiency induces apoptosis and quiescence loss, and substantially impairs the reconstitution capacity of HSCs. In addition, deletion of IGF2BP2 increases the mitochondrial activity of HSCs. Mechanistically, IGF2BP2 stabilizes Bmi1 mRNA in an m6A-dependent manner, which represses the expression of mitochondria-related genes. Collectively, our results present a fascinating portrait of m6A modification during haematopoiesis, and uncover a key role of IGF2BP2 in maintaining HSCs function by regulating Bmi1 stability and restraining mitochondrial activity.

2021-10-26 | GSE165863 | GEO

Single cell transcriptomes of cord blood derived subsets of human haematopoietic stem cells, LMPP and MLP myelo-lymphoid restricted progenitors

Project description:This SuperSeries is composed of the SubSeries listed below.

2018-09-14 | GSE115798 | GEO

Conversion of adult endothelium to immunocompetent haematopoietic stem cells

Project description:Developmental pathways that orchestrate the fleeting transition of endothelial cells into haematopoietic stem cells remain undefined. Here we demonstrate a tractable approach for fully reprogramming adult mouse endothelial cells to haematopoietic stem cells (rEC-HSCs) through transient expression of the transcription-factor-encoding genes Fosb, Gfi1, Runx1, and Spi1 (collectively denoted hereafter as FGRS) and vascular-niche-derived angiocrine factors. The induction phase (days 0-8) of conversion is initiated by expression of FGRS in mature endothelial cells, which results in endogenous Runx1 expression. During the specification phase (days 8-20), RUNX1+ FGRS-transduced endothelial cells commit to a haematopoietic fate, yielding rEC-HSCs that no longer require FGRS expression. The vascular niche drives a robust self-renewal and expansion phase of rEC-HSCs (days 20-28). rEC-HSCs have a transcriptome and long-term self-renewal capacity similar to those of adult haematopoietic stem cells, and can be used for clonal engraftment and serial primary and secondary multi-lineage reconstitution, including antigen-dependent adaptive immune function. Inhibition of TGF? and CXCR7 or activation of BMP and CXCR4 signalling enhanced generation of rEC-HSCs. Pluripotency-independent conversion of endothelial cells into autologous authentic engraftable haematopoietic stem cells could aid treatment of haematological disorders.

2017-05-18 | GSE88840 | GEO

Chemotherapy-induced transposable elements activate MDA5 to enhance haematopoietic regeneration

Project description:Haematopoietic stem cells (HSCs) are normally quiescent, but have evolved mechanisms to respond to stress. Here, we evaluate haematopoietic regeneration induced by chemotherapy. We detect robust chromatin reorganization followed by increased transcription of transposable elements (TEs) during early recovery. TE transcripts bind to and activate the innate immune receptor melanoma differentiation-associated protein 5 (MDA5) that generates an inflammatory response that is necessary for HSCs to exit quiescence. HSCs that lack MDA5 exhibit an impaired inflammatory response after chemotherapy and retain their quiescence, with consequent better long-term repopulation capacity. We show that the overexpression of ERV and LINE superfamily TE copies in wild-type HSCs, but not in Mda5−/− HSCs, results in their cycling. By contrast, after knockdown of LINE1 family copies, HSCs retain their quiescence. Our results show that TE transcripts act as ligands that activate MDA5 during haematopoietic regeneration, thereby enabling HSCs to mount an inflammatory response necessary for their exit from quiescence.

2021-06-28 | GSE129631 | GEO

Gene expression in haematopoietic stem and progenitor cells from Gata1-EGFP reporter mouse bone marrow

Project description:Haematopoietic stem cells can differentiate into all blood cell types. In this process, cells become progressively restricted to a single cell type. The order in which differentiating cells loose lineage potential, and the prospective isolation of cells with a defined potential remains a long-standing question. We performed gene expression analysis of haematopoietic cells from Gata1-EGFP reporter mice, leading to a model for hematopoiesis where the initial lineage decision consists of a separation of erythroid/megakaryocyte/mast cell/eosinophil potential from lymphopoietic/monocyte/neutrophil potential RNA was isolated from HSC EGFP-, HSC EGFP+, LMPP, CLP, preGM EGFP-, preGM EGFP+, GMP EGFP-, GMP EGFP+ and preMegE cells with the QIAGEN RNeasy Micro Kit.

2016-04-04 | E-GEOD-49241 | biostudies-arrayexpress

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