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RNA-sequencing analysis of adult mouse wild type (Prdm16-Mx1-Cko/Cko +/+) and Prdm16-/- (Prdm16-Mx1-Cko/Cko Tg/+) Long Term-Hematopoietic Stem Cells (LT-HSC).

ABSTRACT: RNA-sequencing analysis of adult mouse wild type (Prdm16-Mx1-Cko/Cko +/+) and Prdm16-/- (Prdm16-Mx1-Cko/Cko Tg/+) Long Term-Hematopoietic Stem Cells (LT-HSC).

PROVIDER: PRJNA644817 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR12172650.fastq.gz	Fastqsanger.gz
	SRR12172651.fastq.gz	Fastqsanger.gz
	SRR12172652.fastq.gz	Fastqsanger.gz
	SRR12172653.fastq.gz	Fastqsanger.gz
	SRR12172654.fastq.gz	Fastqsanger.gz

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RNA-sequencing analysis of adult mouse wild type (Prdm16-Mx1-Cko/Cko; +/+) and Prdm16-/- (Prdm16-Mx1-Cko/Cko; Tg/+) Long Term-Hematopoietic Stem Cells (LT-HSC).

Project description:Regulation of quiescence is critical for the maintenance of adult hematopoietic stem cells (HSCs). Previous studies by gene disruption during mouse embryonic development have shown that transcription factor gene Prdm16 is important for the generation/maintenance of fetal liver HSCs; however, the underlying mechanisms and the function of Prdm16 in adult HSCs remain unclear. To investigate the role of Prdm16 in adult HSCs, we generated a novel conditional knockout mouse model and deleted Prdm16 in adult mouse hematopoietic system using the interferon inducible Mx1-Cre. Our results show that deletion of Prdm16 leads to a gradual decline of adult HSC numbers and a concomitant increase in the multipotent progenitor (MPP) compartment. Prdm16 deletion in the hematopoietic system following transplantation produced the same phenotype indicating that the defect is intrinsic to the HSCs. This HSC loss was also exacerbated by stress induced by 5-FU injections. Annexin V staining showed no difference in apoptosis between wild type and knockout HSCs. In contrast, BrdU analysis revealed that loss of Prdm16 significantly increases cycling of long-term HSCs (LT-HSCs) with majority of the cells found in the S to G2/M phase. Consistently, RNA-seq analysis of mouse LT- HSCs with and without Prdm16 deletion showed that Prdm16 loss induced a significant decrease in the expression of several known cell cycle regulators of HSCs, among which Cdkn1a and Egr1 were further identified as direct targets of Prdm16. Our results suggest that Prdm16 preserves the function of adult LT-HSCs by promoting their quiescence.

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Project description:Identification of genome-wide PRDM16 binding, H3K27ac and H3K4me in WT and Prdm16 conditional knock-out (cKO) mouse (Emx1Ires-Cre; Prdm16flox/flox) at embryonic day 15.5.

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Expression data from control and LRF (leukemia/lymphoma related factor)-deficient mouse LT-HSCs

Project description:LRF, which is encoded by the ZBTB7A gene and formerly known as POKEMON (POK erythroid myeloid ontogenic factor), was originally identified as a PLZF (promyelocytic leukemia zinc finger) homologue interacting with BCL6 (B-cell lymphoma 6). LRF is a transcription factor that is broadly expressed in hematopoietic lineage cells, but its expression is particularly high in erythroblasts and germinal center (GC) B-cells. The goal of this study is to assess the effect of LRF loss on the LT-HSC transcriptome. Nine days after injection of adult mice with polyinosinic polycytidylic acid (pIpc) to activate Cre, total RNAs were isolated from double-sorted LT-HSCs from LRF Flox/+ Mx1-Cre+ and LRF Flox/Flox Mx1-Cre+ mice and processed for microarray analysis. We performed gene expression microarray analysis of FACS-sorted LT-HSCs (LSK IL7Ra-Flt3-CD150+CD48-) to assess the effect of Lrf loss on the LT-HSC transcriptome. Zbtb7a Flox/+ Mx1-Cre+ mice were used as a control to normalize the potential effects of Cre recombinase. LT-HSCs were FACS-sorted from three Lrf knockout (Zbtb7a Flox/Flox Mx1-Cre+) and two control (Zbtb7a Flox/+ Mx1-Cre+) mice, nine days after the first pIpC injection.

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