Homo sapiens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA97495 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:We investigated the miRNA expression in ex vivo human erythroid cultures from umbilical cord blood (UCB)-derived CD34 cells. Hypothetically, the decline of certain miRNAs may promote erythropoiesis by unblocking expression of key functional proteins while the up-regulation of other miRNAs may block commitment to non-erythroid lineages. Therefore, discovering the patterns and sequence of miRNA expression during hematopoietic differentiation will provide insights about the functional roles of these tiny noncoding genes. Keywords: miRNA expression profiling
2007-04-01 | GSE6000 | GEO
Project description:Preeclampsia (PE) has been associated with placental dysfunction, resulting in foetal hypoxia, accelerated erythropoiesis and increased erythroblast count in the umbilical cord blood (UCB). Although the detailed effects remain unknown, placental dysfunction can also cause inflammation, nutritional and oxidative stress in the fetus that can affect erythropoiesis. Here, we compared the expression of surface adhesion molecules and erythroid differentiation capacity of UCB hematopoietic stem/ progenitor cells (HSPCs), UCB erythroid profiles along with transcriptome and proteome of these cells between male and female foetuses from PE and normotensive pregnancies. While no significant differences were observed in UCB HSPC migration/ homing and in vitro erythroid colony differentiation, the UCB HSPC transcriptome and the proteomic profile of the in vitro differentiated erythroid cells differed between PE vs normotensive samples. Accordingly, despite absence of significant differences in the UCB erythroid populations in male or female foetuses from PE or normotensive pregnancies, transcriptional changes were observed during erythropoiesis, particularly affecting male foetuses. Pathway analysis suggested deregulation in mTORC1/AMPK signaling pathways controlling cell cycle, differentiation and protein synthesis. These results associate PE with transcriptional and proteomic changes in foetal HSPCs and erythroid cells that may underlie the higher erythroblast count in the UCB in PE.
2019-06-20 | PXD010364 | Pride
Project description:The characteristics of global gene expression patterns during umbilical cord blood (UCB)-CD34+ stem cell-derived erythropoiesis are not clearly elucidated. In this study, UCB-stem cells were grown in liquid culture as a model for this process. We observed a high proliferative capacity of UCB-stem cells producing over 10 billion viable cells in culture. Normal erythroid maturation was confirmed by increased expression of CD71 and CD235a biomarkers. Furthermore, the gamma- to beta-globin gene switch was observed around day 45 indicating extended gamma-globin gene expression in fetal erythroid cells. To study global gene expression patterns, microarray analysis was performed on days 21, 42, 49 and 56. Forty-five transcription factors were silenced during the culture period (Profile-1) including CUX1 and HES5 among others. Conversely, 30 transcription factors were activated by day 56 (Profile-2) such as KLF1, GATA1, and MAFB. Both datasets were analyzed further using the MIMI Cytoscape platform which defined transcription factor networks around KLF4 and GATA2 from Profile-1 genes and KLF1 and GATA1 for Profile-2 genes. The characteristics of UCB-CD34+ stem cells including high proliferative capacity and prolonged gamma-globin expression combined with novel transcription factor networks suggest novel mechanisms of fetal UCB-stem cell-derived erythropoiesis.
2013-08-02 | GSE49438 | GEO
Project description:We have sequenced miRNA libraries from human embryonic, neural and foetal mesenchymal stem cells. We report that the majority of miRNA genes encode mature isomers that vary in size by one or more bases at the 3’ and/or 5’ end of the miRNA. Northern blotting for individual miRNAs showed that the proportions of isomiRs expressed by a single miRNA gene often differ between cell and tissue types. IsomiRs were readily co-immunoprecipitated with Argonaute proteins in vivo and were active in luciferase assays, indicating that they are functional. Bioinformatics analysis predicts substantial differences in targeting between miRNAs with minor 5’ differences and in support of this we report that a 5’ isomiR-9-1 gained the ability to inhibit the expression of DNMT3B and NCAM2 but lost the ability to inhibit CDH1 in vitro. This result was confirmed by the use of isomiR-specific sponges. Our analysis of the miRGator database indicates that a small percentage of human miRNA genes express isomiRs as the dominant transcript in certain cell types and analysis of miRBase shows that 5’ isomiRs have replaced canonical miRNAs many times during evolution. This strongly indicates that isomiRs are of functional importance and have contributed to the evolution of miRNA genes
2014-08-06 | GSE58734 | GEO
Project description:The characteristics of global gene expression patterns during umbilical cord blood (UCB)-CD34+ stem cell-derived erythropoiesis are not clearly elucidated. In this study, UCB-stem cells were grown in liquid culture as a model for this process. We observed a high proliferative capacity of UCB-stem cells producing over 10 billion viable cells in culture. Normal erythroid maturation was confirmed by increased expression of CD71 and CD235a biomarkers. Furthermore, the gamma- to beta-globin gene switch was observed around day 45 indicating extended gamma-globin gene expression in fetal erythroid cells. To study global gene expression patterns, microarray analysis was performed on days 21, 42, 49 and 56. Forty-five transcription factors were silenced during the culture period (Profile-1) including CUX1 and HES5 among others. Conversely, 30 transcription factors were activated by day 56 (Profile-2) such as KLF1, GATA1, and MAFB. Both datasets were analyzed further using the MIMI Cytoscape platform which defined transcription factor networks around KLF4 and GATA2 from Profile-1 genes and KLF1 and GATA1 for Profile-2 genes. The characteristics of UCB-CD34+ stem cells including high proliferative capacity and prolonged gamma-globin expression combined with novel transcription factor networks suggest novel mechanisms of fetal UCB-stem cell-derived erythropoiesis. Cd34 cell from umbilical cord blood were grown in three independent cultures using the one-phase protocol. Cells were cultured in aMEM containing 30% fetal bovine serum, 1% deionized BSA with penicillin (100 U/mL) and streptomycin (0.1 mg/mL) at 37°C and 5% CO2. The following growth factors were added on day 0: stem cell factor (50 ng/mL), interleukin-3 (10 ng/mL) and erythropoietin (4 U/mL). Approximately 1.5 million cells were harvested from each culture (triplicate samples) on day 21, 42, 49 and 56 for microarray analysis on the whole-genome Illumina HumanWG-12 V4 Expression BeadChip.
2013-08-02 | E-GEOD-49438 | biostudies-arrayexpress
Project description:Transcriptional profiling of human mesenchymal stem cells comparing normoxic MSCs cells with hypoxic MSCs cells. Hypoxia may inhibit senescence of MSCs during expansion. Goal was to determine the effects of hypoxia on global MSCs gene expression.
2011-02-19 | GSE20463 | GEO
Project description:We have sequenced miRNA libraries from human embryonic, neural and foetal mesenchymal stem cells. We report that the majority of miRNA genes encode mature isomers that vary in size by one or more bases at the 3’ and/or 5’ end of the miRNA. Northern blotting for individual miRNAs showed that the proportions of isomiRs expressed by a single miRNA gene often differ between cell and tissue types. IsomiRs were readily co-immunoprecipitated with Argonaute proteins in vivo and were active in luciferase assays, indicating that they are functional. Bioinformatics analysis predicts substantial differences in targeting between miRNAs with minor 5’ differences and in support of this we report that a 5’ isomiR-9-1 gained the ability to inhibit the expression of DNMT3B and NCAM2 but lost the ability to inhibit CDH1 in vitro. This result was confirmed by the use of isomiR-specific sponges. Our analysis of the miRGator database indicates that a small percentage of human miRNA genes express isomiRs as the dominant transcript in certain cell types and analysis of miRBase shows that 5’ isomiRs have replaced canonical miRNAs many times during evolution. This strongly indicates that isomiRs are of functional importance and have contributed to the evolution of miRNA genes Sequence library of miRNAs from a single sample of human foetal mesenchymal stem cells. Results tested and confirmed by northern blotting. Please note that only raw data files are available for the embryonic and neual samples and thus, directly submitted to SRA (SRX547311, SRX548700, respectively under SRP042115/PRJNA247767)
2014-08-06 | E-GEOD-58734 | biostudies-arrayexpress
Project description:Gene expression profiling of immortalized human mesenchymal stem cells with hTERT/E6/E7 transfected MSCs. hTERT may change gene expression in MSCs. Goal was to determine the gene expressions of immortalized MSCs.
2010-09-25 | GSE24338 | GEO
Project description:Transcriptional profiling of human mesenchymal stem cells comparing normoxic MSCs cells with hypoxic MSCs cells. Hypoxia may inhibit senescence of MSCs during expansion. Goal was to determine the effects of hypoxia on global MSCs gene expression. Two-condition experiment, Normoxic MSCs vs. Hypoxic MSCs.
2011-02-19 | E-GEOD-20463 | biostudies-arrayexpress
Project description:RNA extracted at 240min. Samples are rRNA depleted. Expression measurement of Homo sapiens genes.
2019-07-31 | GSE114179 | GEO