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Effects of USB1 mutation on global miRNome during hESC-derived definitive hematopoiesis

ABSTRACT: Effects of USB1 mutation on global miRNome during hESC-derived definitive hematopoiesis

PROVIDER: PRJNA931236 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR23330502.fastq.gz	Fastqsanger.gz
	SRR23330503.fastq.gz	Fastqsanger.gz
	SRR23330504.fastq.gz	Fastqsanger.gz
	SRR23330505.fastq.gz	Fastqsanger.gz
	SRR23330506.fastq.gz	Fastqsanger.gz

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Effect of USB1 mutation on global transcriptome during hESC-derived definitive hematopoiesis

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Effects of USB1 mutation on global miRNome during hESC-derived definitive hematopoiesis

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Project description:HESC-H9 and iPSC lines 3.5, 3.6 and 3.12 were analyzed using Affymetrix microarray before and after Definitive Endoderm (DE) formation. DE was induced using the ActivinA differentiation protocol described by D'Amour et al., 2006 (PMID: 16258519) Clustering analysis of transcripts that were differentially regulated during DE formation indicated that iPSC lines 3.5 and 3.12 differentiate in manner that is highly similar to HESC-H9 cells iPSC line 3.6 had a more divergent transcriptional profile. Three induced pluripotent stem cell lines (iPSC) and one human embryonic stem cell line (hESC - H9) were collected as undifferentiated (UD) cells, and flash frozen. These cell lines were also subjected to definitive endoderm (DE) induction, collected and flash frozen. RNA was harvested from the frozen cell pellets and hybridized to the Affymetrix microarray chip. The three iPSC cell lines are iPSC 3.5, iPSC 3.6. and iPSC 3.12. In the UD state, iPSC 3.5 was analyzed in duplicate, while iPSCs 3.6 and 3.12 and H9s were analyzed in biological triplicate. All four cell lines were analyzed as biological triplicates for DE induction.

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Project description:Neutrophils and erythrocytes are vital to the immune system and oxygen transport, respectively. However, the mechanisms by which hematopoietic niches support their development remain incompletely understood. In hematopoiesis research, zebrafish larvae are a common model for studying the development of definitive neutrophils and erythrocytes in the caudal hematopoietic tissue. In this study, we showed that erythrocytes predominantly reside inside the blood vessels of the CHT, while neutrophils stay outside. Ectopic vascular endothelium, induced by Bone Morphogenetic Protein 2b(Bmp2b) overexpression, attracts both cell types, with erythrocytes inside and neutrophils outside. CHT removal has minimal impact on definitive neutrophils from the ventral wall of the dorsal aorta (VDA) but severely affects definitive erythrocytes from the same source. Bulk RNA-sequencing identified epoa as a vital factor for erythrocyte generation within CHT endothelium. Overexpression of epoa through the lyve1b promoter, which is specifically expressed in vein, lymphatic vessels and CHT vein endothelial cells, rescued the erythrocyte reduction in epoa mutants. Our study reveals that the caudal hematopoietic tissue is differentially required for definitive erythrocytes and neutrophils.

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