Homo sapiens
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ABSTRACT:
PROVIDER: PRJNA312940 | ENA |
REPOSITORIES: ENA
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Project description:MSC-adherent hematopoietic stem and progenotir cells (HSPC) express adhesion-associated genes at higher levels than non-adherent cells while cell-cycle and differentiation-associated genes are not significantly changed between the two cell populations. We used microarray to confirm identity of MSC-adherent and non-adherent cord blood-derived HSPCs and to exclude that cell cycle and differentiation affect adhesive capacity. CD34 positive cells were isolated from human cord blood (not older than 24h), expanded for 3 days and assayed for the adhesion to MSC. The adherent and non-adherent live CD34+ cells were sorted and total RNA was extracted.
2016-05-16 | E-GEOD-78216 | biostudies-arrayexpress
Project description:MSC-adherent hematopoietic stem and progenotir cells (HSPC) express adhesion-associated genes at higher levels than non-adherent cells while cell-cycle and differentiation-associated genes are not significantly changed between the two cell populations. We used microarray to confirm identity of MSC-adherent and non-adherent cord blood-derived HSPCs and to exclude that cell cycle and differentiation affect adhesive capacity.
2016-05-16 | GSE78216 | GEO
Project description:Transcription profiling analysis was performed on purified CD34+ cell lines (Cord Blood CD34+) treated with ExtracellularVescicles (EVs) isolated from bone marrow mesenchymal stem cells (BM-MSC).
2015-10-14 | E-MTAB-3576 | biostudies-arrayexpress
Project description:Direct contact with mesenchymal stromal impacts on migratory behavior and gene expression profile of CD133+ hematopoietic stem cells during ex-vivo expansion Objective: To investigate the impact of direct contact between mesenchymal stromal cells (MSCs) and CD133+ hematopoietic stem cells (HSCs) in terms of expansion potential differentiation, migratory capacity and gene expression profile. Methods: CD133+ purified HSCs were cultured for 7 days on subconfluent MSCs supplemented with growth factor containing medium. After ex-vivo expansion, non-adherent and adherent cells were collected and analyzed separately. Results: The adherent cells were found to have a more immature phenotype compared to the non-adherent fraction. CXCR4 was up regulated in the adherent fraction which was associated with a higher migration capacity towards a SDF-1 gradient. CFU-GM and LTC-IC assays demonstrated a higher clonogenicity and repopulating capacity of the adherent fraction. Genes involved in adhesion, cell cycle control, motility, self-renewal and apoptosis were expressed at a higher level in the adherent fraction. Conclusion: Adhesion and direct cell-cell contact with a MSC feeder layer supports ex-vivo expansion, migratory potential and stemness of CD133+ HSCs. Keywords: co-culture hematopoietic stem cells (HSCs) on mesenchymal stromal cells (MSCs)
2008-11-13 | GSE13566 | GEO
Project description:Primary myelofibrosis (PMF) is a clonal myeloproliferative neoplasm whose severity and treatment complexity is attributed to the presence of bone marrow (BM) fibrosis and alterations of stroma impairing the production of normal blood cells. Despite the recently discovered mutations including the JAK2V617F mutation in about half of patients, the primitive event responsible for the clonal proliferation is still unknown. In the highly inflammatory context of PMF, the presence of fibrosis associated with a neoangiogenesis and an osteosclerosis concomitant to the myeloproliferation and to the increase number of circulating hematopoietic progenitors suggests that the crosstalk between hematopoietic and stromal cells is deregulated in the PMF BM microenvironment. Within these niches, Mesenchymal Stromal Cells (BM-MSC) play a supportive role in the production of growth factors and extracellular matrix which regulate the proliferation, differentiation, adhesion and migration of hematopoietic progenitors. A transcriptome analysis of BM-MSC in PMF patients will help to characterize their molecular alterations and to understand their involvement in the hematopoietic progenitor deregulation that features PMF. Primary Myelofibrosis, mesenchymal stroma cells, bone marrow, myeloproliferative disorders Transcriptome analysis was performed on BM-MSC amplified in vitro after 3 to 5 passages. Agilent Whole Human Genome Oligo Microarrays were used to compare expression profiling of BM-MSC from PMF patients and healthy donors.
2015-01-10 | E-GEOD-44426 | biostudies-arrayexpress
Project description:Direct contact with mesenchymal stromal impacts on migratory behavior and gene expression profile of CD133+ hematopoietic stem cells during ex-vivo expansion Objective: To investigate the impact of direct contact between mesenchymal stromal cells (MSCs) and CD133+ hematopoietic stem cells (HSCs) in terms of expansion potential differentiation, migratory capacity and gene expression profile. Methods: CD133+ purified HSCs were cultured for 7 days on subconfluent MSCs supplemented with growth factor containing medium. After ex-vivo expansion, non-adherent and adherent cells were collected and analyzed separately. Results: The adherent cells were found to have a more immature phenotype compared to the non-adherent fraction. CXCR4 was up regulated in the adherent fraction which was associated with a higher migration capacity towards a SDF-1 gradient. CFU-GM and LTC-IC assays demonstrated a higher clonogenicity and repopulating capacity of the adherent fraction. Genes involved in adhesion, cell cycle control, motility, self-renewal and apoptosis were expressed at a higher level in the adherent fraction. Conclusion: Adhesion and direct cell-cell contact with a MSC feeder layer supports ex-vivo expansion, migratory potential and stemness of CD133+ HSCs. Keywords: co-culture hematopoietic stem cells (HSCs) on mesenchymal stromal cells (MSCs) Non-adherent and adherent fractions from three independent experiments were isolated and collected. Cells were stabilized in PreProtct™ buffer (Miltenyi Biotec, Germany) and stored at -80ºC. Samples were shipped to Miltenyi Biotec (Bergisch Gladbach, Germany) a Whole Human Genome expression analysis. Briefly RNA was extracted and overall quality of total RNA samples was checked via the Agilent 2100 Bioanalyzer platform (Agilent Technologies). RNA samples were amplified and labelled using the Agilent Low RNA Input Linear Amp Kit (Agilent Technologies). Non-adherent samples were pooled as “Non-adherent pool” and adherent samples were pooled as “adherent pool” and labelled with Cy3 and Cy5, respectively. Fluorescence signals of the hybridized Agilent Oligo Microarrays were detected using Agilent’s DNA microarray scanner and the microarray image files were processed with The Agilent Feature Extraction Software (FES).
2008-11-12 | E-GEOD-13566 | biostudies-arrayexpress
Project description:Expression patterns of Dendritic cells co cultured with cord blood MSC were compared with cord blood MSC (USSC). Putative immune suppressive candidates were tested to explain this inhibition. We find that cord blood MSC themselves are hardly immunogenic as tested with allogeneic T-cells. Dendritic cells cocultured with second party T-cells evoked abundant proliferation that was inhibited by third party cord blood USSC. Optimal inhibition was seen with one cord blood USSC for every dendritic cell. Blocking HLA-G only saw partial recovery of proliferation. Several cytokines, prostaglandins, gangliosides, enzymes like arginase, NO synthase and indole amine 2,3-dioxygenase as well as the induction of Treg were not involved in the inhibition based on the microarrays and functional tests. Although the mechanism by which it does so remains partially undefined and subject to further study, cord blood multipotent stromal cells are strong inhibitors of the immune response and therefore allow their use in tissue regeneration settings in an allogeneic setting. Keywords: Adult stem cells, developmental biology, gene expression, genomics, human cord blood, mesenchymal stem cells, cel type comparison Dendritic cells co cultured with cord blood MSC compared with cord blood MSC (USSC).
2010-08-03 | E-GEOD-23366 | biostudies-arrayexpress
Project description:Gene expression profiling of primary cord blood hematopoietic stem cell (day 0, CD34+ cells), enriched control (untreated), Scriptaid and Valproic acid expanded CD34+ cells after a week in culture. Cord blood CD34+ cells were processed individually and equal number of PC and reisolated CD34+ cells from 3-4 samples were pooled after expansion to avoid sample variations.
2014-07-29 | GSE59803 | GEO
Project description:A non-controversial and non-invasive source of adult stem cells (ASCs), particularly hematopoietic stem cells (HSCs) and mesenchymal stem cells (MSCs) is human umbilical cord blood. HSCs derived from cord blood have been used for treating leukemia and other blood disorders for the last 30 years. While the presence of MSCs in cord blood is limited, umbilical cord has been found to be promising source of MSCs. However, the cord is an anatomically complex organ and potential isolation of MSCs from its various parts has not been fully explored. In this study we dissected the cord into cord placenta junction (CPJ), cord tissue (CT), and Wharton’s jelly (WJ) and isolated stem cells. These cells exhibited fibroid morphology, expressed MSC-specific markers including CD90, CD73, CD105, CD44, and CD29 and differentiated into chondrogenic, osteogenic, myogenic and neurogenic lineages. In addition, they all expressed pluripotency genes, OCT4, Nanog, Sox2 and KLF4 but expression of these markers was highest in CPJ followed by WJ and CT. CPJ-MSCs also had higher rate of proliferation compared to WJ- and CT-MSCs. Proliferation of WJ- and CT-MSCs was markedly decreased upon passaging with concomitant decrease in expression of MSC and pluripotency markers. Based on their greater self-renewal potential, CPJ-MSCs could be superior to WJ- and CT-MSCs for the applications in therapeutic and regenerative medicine.
2016-06-08 | GSE72597 | GEO
Project description:A non-controversial and non-invasive source of adult stem cells (ASCs), particularly hematopoietic stem cells (HSCs) and mesenchymal stem cells (MSCs) is human umbilical cord blood. HSCs derived from cord blood have been used for treating leukemia and other blood disorders for the last 30 years. While the presence of MSCs in cord blood is limited, umbilical cord has been found to be promising source of MSCs. However, the cord is an anatomically complex organ and potential isolation of MSCs from its various parts has not been fully explored. In this study we dissected the cord into cord placenta junction (CPJ), cord tissue (CT), and Wharton’s jelly (WJ) and isolated stem cells. These cells exhibited fibroid morphology, expressed MSC-specific markers including CD90, CD73, CD105, CD44, and CD29 and differentiated into chondrogenic, osteogenic, and adipogenic lineages. In addition, they all expressed pluripotency genes, OCT4, Nanog, Sox2 and KLF4 but expression of these markers was highest in CPJ followed by WJ and CT. CPJ-MSCs also had higher rate of proliferation compared to WJ- and CT-MSCs. Proliferation of WJ- and CT-MSCs was markedly decreased upon passaging with concomitant decrease in expression of MSC and pluripotency markers. Based on their greater self-renewal potential, CPJ-MSCs could be superior to WJ- and CT-MSCs for the applications in therapeutic and regenerative medicine.
2016-06-08 | GSE76295 | GEO