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RNA-seq of human long-term and short-term hematopoietic stem cells from umblical cord blood with lentiviral overexpression of S1PR3

ABSTRACT: RNA-seq of human long-term and short-term hematopoietic stem cells from umblical cord blood with lentiviral overexpression of S1PR3

PROVIDER: PRJNA627714 | ENA |

REPOSITORIES: ENA

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RNA-seq of human long-term and short-term hematopoietic stem cells from umblical cord blood with lentiviral overexpression of S1PR3

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RNA-seq study of human long-term and short-term hematopoietic stem cells from umblical cord blood with lentiviral overexpression of S1PR3

Project description:To investigate the molecular and biological pathways altered by S1PR3OE in human hematopoietic stem cells (HSC), we performed RNA-sequencing (RNA-seq) of LT- and ST-HSC 3 days after transduction with control or S1PR3 overexpression (OE) lentiviral vectors. LT-HSC and ST-HSC from 3 pool of CB lin- were FACS-purified, cells were prestimulated for 4 hours and transduced with lentiviral vectors. At day 3, 2000-5300 BFP+ cells were FACS-purified for RNA isolation with a PicoPure kit. We were able to isolate only 1600-1800 BFP+ cells from LT-HSC control samples as opposed to 4000-5400 BFP+ cells from S1PR3OE samples. Thus, we pooled all control BFP+ LT-HSC cells into one sample for RNA-seq analysis. BFP- LT-HSC from control vector transduction were purified from CB1 as an additional LT-HSC control. Nextera libraries generated from 10 ng RNA from 5 LT-HSC samples (2 controls, 3 S1PR3OE) and 6 ST-HSC samples (3 controls, 3 S1PR3OE) were subjected to 125 bp, paired-end RNA-sequencing on the Illumina HiSeq 2500 with an average of 50 million reads/sample at the Center for Applied Genomics, Sick Kids Hospital.

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Project description:RNA-seq of uncultured CD112high and CD112low long-term(LT) human hematopoietic stem cells (HSC) and cultured and lentiviral transduced (CTRL, INKA1-OE) LT- and short-term HSC from umbilical cord blood We performed RNA-sequencing to elucidate the biological pathways (1) altered by INKA1 overexpression in LT-HSC and ST-HSC that may contribute to the induced transient restraint in generating proliferative hematopoietic output in vivo and in vitro; and (2) that underlie the differential in vitro priming and regeneration phenotypes of CD112high and CD112low LT-HSC. Therefore, we prospectively isolated indicated subpopulations from 3 independent human umbilical cord blood pools and subjected them either to RNA-sequencing directly or following culture, lentiviral transduction and purification of the transduced cell fractions. We show that distinct subsets of human LT-HSC respond differently to regeneration-mediated stress and that INKA1 governs these distinct stemness states where CD112low LT-HSC are marked by an alternative state of quiescence with high INKA1 preserving self-renewal and regenerative capacity upon successive rounds of regeneration-mediated stress.

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Transcriptomic analysis of MYC overexpression in LT-HSC.

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Comparative analysis of gene expression by human Umblical Cord (UCB)-CD34+ Hematopoietic Stem Cells (HSCs) and human induced pluripotent stem (iPS) cell-derived CD34+ Hematopoietic Progenitor Cells (HPCs)

Project description:Hematopoietic stem and progenitor cells are a rare, self-renewing bone marrow resident population capable of giving rise to all circulating hematopoietic cells. They can be used therapuetically for reconstituting defective or ablated hematopoietic systems following chemotherapy, and for inducing tolerance toward allografts of the same haplotype as the HSC donor. There are several sources for HSCs, such as the adult bone marrow, or umblical cord blood, which is more replete with such HSCs. However, HSCs obtained from such sources may be immunogenic, especially if isolated from adult bone marrow. To overcome this issue, our lab has establsihed human induced pluripotent stem cell-derived HPCs with the hope of creating a nonimmunogenic, readily available and unlimited source of HSCs to use for therapy. The goal of this study was to compare the gene expression profiles of naturally found HSCs (UCB-CD34+ HSCs) and HPCs differentiated from 4 different human iPS cell lines (iPS-HPCs), so as to determine the variation between the four iPS-HPCs and whether there were any differences between these HPCs and naturally found HSCs. We utilized 4 iPS cells for this study (detailed descriptions are provided below). iPS cells were differentiated into hematopoietic progenitor cells by coculture on OP9 stromal cells, followed by enrichment of CD34+ cells through immunomagnetic bead separation. The UCB-CD34+ cells were isolated from frozen cord samples through immunomagnetic bead separation. Total RNA was isolated and human gene Affymetrix ST 1.0 arrays performed at the University of Iowa DNA core facility. Data was analyzed, normalized and plotted on BRB Array Tools.

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Umbilical cord as a long-term source of activatable MSC for immunomodulation

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