Project description:miRNA profiling of human H9-derived neural stem cells (H9-NSCs) comparing control human adult dermal fibroblasts (hDFs), SOX2-transduced human induced neural stem cells (hDF-iNSC (SOX2)), SOX2/HMGA2-transduced human induced neural stem cells (hDF-iNSC (SOX2/HMGA2)). Goal was to determine the global miRNA expression between the groups. H9-NSC vs hDF vs hDF-iNSC(SOX2) vs hDF-iNSC(SOX2/HMGA2)
Project description:miRNA profiling of human H9-derived neural stem cells (H9-NSCs) comparing control human adult dermal fibroblasts (hDFs), SOX2-transduced human induced neural stem cells (hDF-iNSC (SOX2)), SOX2/HMGA2-transduced human induced neural stem cells (hDF-iNSC (SOX2/HMGA2)). Goal was to determine the global miRNA expression between the groups.
Project description:The iNSC cells are two clones generated from the same MEF line. Therefore, we conducted one analysis that compared the two clonal lines and a separate analysis that compared iNSC vs. NSC, iNSC vs. MEF, and NSC vs. MEF. Both were single factor ANOVAs, the first compared two groups (the iNSC lines) and the second had three groups. For the second analysis, we then used linear contrasts to extract the information about differences between all pairs (e.g. iNSC vs. NSC). Looking at the iNSC lines, the correlations between samples from different clonal lines are as high as the correlations between samples from within a clonal line. Given this, we think that the analysis that combines all 6 of them to compare against the other cell types is appropriate. Array Platform: Affymetrix Mouse Gene 1.0 ST Samples: A total of 12 arrays array# filename genotype 1 01.iNSC1.1.CEL iNSC 2 02.iNSC1.2.CEL iNSC 3 03.iNSC1.3.CEL iNSC 4 04.iNSC2.1.CEL iNSC 5 05.iNSC2.2.CEL iNSC 6 06.iNSC2.3.CEL iNSC 7 07.WT.NSC.1.CEL NSC 8 08.WT.NSC.2.CEL NSC 9 09.WT.NSC.3.CEL NSC 10 10.WT.MEFs.1.CEL MEF 11 11.WT.MEFs.3.CEL MEF 12 12.WT.MEFs.5.CEL MEF
Project description:The iNSC cells are two clones generated from the same MEF line. Therefore, we conducted one analysis that compared the two clonal lines and a separate analysis that compared iNSC vs. NSC, iNSC vs. MEF, and NSC vs. MEF. Both were single factor ANOVAs, the first compared two groups (the iNSC lines) and the second had three groups. For the second analysis, we then used linear contrasts to extract the information about differences between all pairs (e.g. iNSC vs. NSC). Looking at the iNSC lines, the correlations between samples from different clonal lines are as high as the correlations between samples from within a clonal line. Given this, we think that the analysis that combines all 6 of them to compare against the other cell types is appropriate.
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
Project description:In this study, we generated wildtype H9 hESC derived cardiomyocytes (CM) and neural stem cells (NSC) by in vitro differentiation. Global gene expression profiles were compared among undifferentiated H9 hESC and the derived CM and NSC. Comparison of global gene expression profiles of undifferentiated H9 hESC and the derived CM and NSC populations.
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)
Project description:In this study, we generated wildtype H9 hESC derived cardiomyocytes (CM) and neural stem cells (NSC) by in vitro differentiation. Global gene expression profiles were compared among undifferentiated H9 hESC and the derived CM and NSC.
Project description:Brief expression of pluripotency-associated factors such as OCT4, KLF4, SOX2 and c-MYC (OKSM), in combination with differentiation-inducing signals, was reported to trigger transdifferentiation of fibroblasts into alternative cell types. Here, we show that OKSM expression gives rise to both induced pluripotent stem cells (iPSCs) and iNSCs under conditions that were previously shown to induce only NSC transdifferentiation. Fibroblast-derived iNSC colonies silenced retroviral transgenes and reactivated silenced X chromosomes, both hallmarks of pluripotent stem cells. Moreover, lineage tracing via an Oct4-CreER labeling system demonstrated that virtually all iNSC colonies originate from cells transiently expressing Oct4, whereas ablation of Oct4-positive cells prevented iNSC formation. Lastly, use of an alternative transdifferentiation cocktail that lacks OCT4 and was reportedly unable to support induced pluripotency, yielded iPSCs and iNSCs carrying the Oct4-CreER-derived lineage label. Together, these data suggest that iNSC generation using OKSM and related reprogramming factors requires passage through a transient iPSC state. 5 samples were anlyzed in total, 2 induced pluripotent stem cells (iPSCs), 1 neural stem cells (NSCs) and 2 induced NSCs (iNSCs)