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Gene expression profile at single cell level of crude umbilical cord blood (UCB) and OP9 pre-conditioned UCB.

ABSTRACT: Gene expression profile at single cell level of crude umbilical cord blood (UCB) and OP9 pre-conditioned UCB.

PROVIDER: PRJNA854378 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR19907697_1.fastq.gz	Fastqsanger.gz
	SRR19907697_2.fastq.gz	Fastqsanger.gz
	SRR19907698_1.fastq.gz	Fastqsanger.gz
	SRR19907698_2.fastq.gz	Fastqsanger.gz
	SRR19907699_1.fastq.gz	Fastqsanger.gz

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Gene expression profile at single cell level of crude umbilical cord blood (UCB) and OP9 pre-conditioned UCB.

Project description:Umbilical cord blood (UCB) transplantation shows pro-angiogenic effect and contributes to symptom amelioration in animal models of cerebral infarction. OP9 is a stromal cell line used as feeder cells to promote hematoendothelial differentiation of embryonic stem cells. We co-cultured UCB 24hr with OP9 (i.e. OP9 preconditioning) and investigated its change in angiogenic properties and underlying mechanisms. Single cell RNA sequencing showed prominent phenotypic shift toward M2 in monocytic fraction of OP9 pre-conditioned UCB.

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miRNA expression during UCB-CD34 cells erythropoiesis

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Project description:Genome wide DNA methylation differences in umbilical cord blood (UCB) of preterm and term born neonates. The Illumina 450K Human DNA methylation Beadchip was used to obtain the DNA methylation profiles of 12 preterm and 12 term UCB samples across 450,000 CpGs. 2 samples were removed due to failed quality control, and BMIQ normalization was done with 11 preterm and 11 term samples.

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Prostaglandin-modulated umbilical cord blood hematopoietic stem cells

Project description:Umbilical cord blood (UCB) is a valuable source of hematopoietic stem cells (HSCs) for use in allogeneic transplantation. Key advantages of UCB are rapid availability and less stringent requirements for HLA matching. However, UCB contains an inherently limited HSC count, which is associated with delayed time to engraftment, high graft failure rates and early mortality. 16,16 dimethyl prostaglandin E2 (dmPGE2) was previously identified to be a critical regulator of HSC homeostasis and we hypothesized that a brief ex vivo modulation could improve patient outcomes by increasing the “effective dose” of HSCs. Molecular profiling with Affymetrix GeneChips were used to determine the optimal ex vivo modulation conditions (e.g., temperature and media) for use in a clinical setting by measured pathway induced expression changes.

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Gene expression profile of mesenchymal stem cells from paired umbilical cord units: cord is different from blood

Project description:Mesenchymal stem cells (MSC) are multipotent cells which can be obtained from several adult and fetal tissues including human umbilical cord units. We have recently shown that umbilical cord tissue (UC) is richer in MSC than umbilical cord blood (UCB) but their origin and characteristics in blood as compared to the cord remains unknown. Here we compared, for the first time, the exonic protein-coding and intronic noncoding RNA (ncRNA) expression profiles of MSC from match-paired UC and UCB samples, harvested from the same donors, processed simultaneously and under the same culture conditions. The patterns of intronic ncRNA expression in MSC from UC and UCB paired units were highly similar, indicative of their common donor origin. The respective exonic protein-coding transcript expression profiles, however, were significantly different. Hierarchical clustering based on protein-coding expression similarities grouped MSC according to their tissue location rather than original donor. Genes related to systems development, osteogenesis and immune system were expressed at higher levels in UCB, whereas genes related to cell adhesion, morphogenesis, secretion, angiogenesis and neurogenesis were more expressed in UC cells. These molecular differences verified in tissue-specific MSC gene expression may reflect functional activities influenced by distinct niches and should be considered when developing clinical protocols involving MSC from different sources. In addition, these findings reinforce our previous suggestion on the importance of banking the whole umbilical cord unit for research or future therapeutic use.

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Candidatus Caldatribacterium saccharofermentans OP9-77CS isolate:OP9-77CS

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cryopreserved CD34 positive human umbilical cord blood cells

Project description:Human umbilical cord blood cells (UCB) is an important alternative resource for the hematopoietic stem cells in treatment of leukemia and other non-malignant diseases. The failure of hematopoiesis reconstruction by the UCB is known to be associated with several clinicopathological features of host patients. There are very few reports available, however, seeking for the association with the quality of umbilical cord blood cells (UCB) themselves. Here we try to address the quality of UCBs by transfusion to the lethally irradiated immunocompromized mice. The cryopreserved CD34+ UCBs cells from twelve different single human donors were transplanted to the irradiated NOD/shi-scid Jic mice. In parallel, total RNAs of the UCBs were subjected to the gene expression profiling with oligonucleotide microarrays. The UCBs from three donors failed to establish the engraftment in the host mice whereas other 9 UCBs succeeded to various extents. Oligonucleotide microarray analysis indicated that 71 genes, including HOXB4 and ETS2, were specifically overexpressed and 23 genes were suppressed more than 2 fold in the successful UCBs comparing with the failed ones (p<0.005, Student’s t-test). Functional annotation analyses revealed that the genes mediated cell growth and cell cycle regulations were enriched in successful UCBs comparing with the failed ones. Our results suggest that the hematopoiesis reconstitution ability may vary among the cryopreserved UCBs and the quality can be distinguished with certain sets of gene expression. The gene expression in human umbilical cord blood cells (UCBs) was measured before transplantation to the lethally irradiated immunocompromized mice. UCBs from 12 individuals were examined.

2010-07-15 | E-GEOD-19835 | biostudies-arrayexpress

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