Single cell RNA sequencing of CD41+ and CD41- CD34+ HPC in model of RUNX1 insufficiency
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA699017 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR13615431.fastq.gz | Fastqsanger.gz | |||
| SRR13615432.fastq.gz | Fastqsanger.gz | |||
| SRR13615433.fastq.gz | Fastqsanger.gz | |||
| SRR13615434.fastq.gz | Fastqsanger.gz | |||
| SRR13615435.fastq.gz | Fastqsanger.gz |
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Project description:Transcription factors have long been recognised as powerful regulators of mammalian development, yet it is largely unknown how individual key regulators operate within wider regulatory networks. Here we have used a combination of global gene expression and chromatin-immunoprecipitation approaches across four ES-cell-derived populations of increasing haematopoietic potential to define the transcriptional programme controlled by Runx1, an essential regulator of blood cell specification. Integrated analysis of these complementary genome-wide datasets allowed us to construct a global regulatory network model, which suggested that core regulatory circuits are activated sequentially during blood specification, but will ultimately collaborate to control many haematopoietically expressed genes. Using the CD41/integrin alpha 2b gene as a model, cellular and in vivo studies showed that CD41 is controlled by both early and late circuits in fully specified blood cells, but initiation of CD41 expression critically depends on a later subcircuit driven by Runx1. Taken together, this study represents the first global analysis of the transcriptional programme controlled by any key haematopoietic regulator during the process of early blood cell specification. Moreover, the concept of interplay between sequentially deployed core regulatory circuits is likely to represent a design principle widely applicable to the transcriptional control of mammalian development. 4 samples: 3 samples of Runx1 transcription factor ChIP from the Runx1+/VE-cadherin+/CD41+ population, Runx1+/VE-cadherin+/CD41- population and Runx1+/VE-cadherin-/CD41+ population, and 1 Control (IgG).
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Project description:Cord blood CD34+ hematopoietic precursors (3 donors) were control or HES6 shRNA (HES6 knockdown) transduced and cultured for four days in media containing SCF, TPO and EPO to drive differentiation towards megakaryocytes and erythroid cells. After four days four subpopulations were sorted for RNA isolation to research the effect of HES6 knockdown on gene expression. We sorted megakaryocytes (CD41+) and early (CD71+ CD235-) and late (CD71+ CD235+) erythroblasts (CD41-) and CD34- precursor cells (CD41- CD71- CD235- CD34-).
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Project description:Transcription factors have long been recognised as powerful regulators of mammalian development, yet it is largely unknown how individual key regulators operate within wider regulatory networks. Here we have used a combination of global gene expression and chromatin-immunoprecipitation approaches across four ES-cell-derived populations of increasing haematopoietic potential to define the transcriptional programme controlled by Runx1, an essential regulator of blood cell specification. Integrated analysis of these complementary genome-wide datasets allowed us to construct a global regulatory network model, which suggested that core regulatory circuits are activated sequentially during blood specification, but will ultimately collaborate to control many haematopoietically expressed genes. Using the CD41/integrin alpha 2b gene as a model, cellular and in vivo studies showed that CD41 is controlled by both early and late circuits in fully specified blood cells, but initiation of CD41 expression critically depends on a later subcircuit driven by Runx1. Taken together, this study represents the first global analysis of the transcriptional programme controlled by any key haematopoietic regulator during the process of early blood cell specification. Moreover, the concept of interplay between sequentially deployed core regulatory circuits is likely to represent a design principle widely applicable to the transcriptional control of mammalian development. 4 samples (Runx1-/VE-cadherin+/Flk1+, Runx1+/VE-cadherin+/CD41+, Runx1+/VE-cadherin+/CD41- and Runx1+/VE-cadherin-/CD41+). 1 x 10^5 undifferentiated ES cells were cultured on confluent OP9 cell layers in 10-cm dishes to induce differentiation. After 6 days of ES cell differentiation, cultured cells were harvested for FACS analysis and sorting.
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Project description:The global gene expression profiles of human umbilical cord blood and adult bone marrow CD34+CD33-CD38-Rho(lo)c-kit+ cells, enriched for hematopoietic stem/progenitor cells (HSC) with CD34+CD33-CD38-Rho(hi) cells, enriched in committed hematopoietic progenitor cells (HPC), were compared to identify candidate regulators of HSC self-renewal versus differentiation fate decisions. Keywords: parallel sample
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Project description:Mononuclear cells were isolated from umbilical cord blood (UCB) using Lymphoprep sucrose-gradient centrifugation (1.077 g/ml, Nycomed Pharma, Oslo, Norway). Immunomagnetic cell separation, using magnetic beads coated with CD34 antibodies (Miltenyi Biotec, Gladbach, Germany), was performed to isolate CD34-positive hematopoietic progenitor cells (CB-CD34+ cells). To generate retrovirus, bicistronic retroviral DNA constructs were used expressing the ETV6-RUNX1 or AML1-ETO fusion gene and enhanced Green Fluorescent Protein (eGFP). As a control, a construct expressing only eGFP was used. Both vectors consisted of a pMSCV promoter region, an internal ribosomal entry site and an ampicillin resistance cassette. HEK293T cells were co-transfected with these constructs and second-generation retroviral packaging vectors using XtremeGENE 9 tranfection reagents (Roche, Basel, Switzerland). Viral particles were collected in IMDM 48 hours after transfection. CD34+ haematopoietic progenitors, pre-cultured overnight as described above, upon which cells were divided in two fractions. One fraction was transduced with ETV6-RUNX1-IRES-eGFP or AML1-ETO-IRES-eGFP, while the other fraction was transduced with control EV-IRES-eGFP. Transductions were performed with fresh retrovirus in retronectin (Takara, Otsu, Japan) coated wells. After sorting, DAPI- CD34+ GFP+ CB-CD34+ cells were lysed and RNA was extracted using Nucleospin RNA XS extraction columns according to manufacturer’s protocol (Macherey-Nagel, Düren, Germany). Quality of RNA was determined by on-chip-electrophoresis using a RNA Pico Chip according to manufacturer’s protocol (Agilent Technologies, Santa Clara, CA, USA). RNA Integrity scores (RIN) were higher than 8 for all samples. RNA was subsequently linearly amplified using the Nugen WT-Amplification™ pico system (Nugen, San Carlos, CA, USA). This system is based on RNA-dependent DNA polymerase activity and was previously reported to be most suitable for amplification and gene expression of picograms of input RNA.
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