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Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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LNGFR- and Thy-1-based prospective isolation of human mesenchymal stem cells reveals functionally distinct subpopulations.

ABSTRACT: Human multipotent mesenchymal stem cells (MSCs), isolated based on their adherence to plastic, show poor growth and differentiation and frequently contain contaminating cells, which limits to clarify their own characteristics. In this study, the identification of two cell surface markers, LNGFR and Thy-1, allowed the prospective isolation of highly purified clonogenic human MSCs. Furthermore, single cell sorting assays followed by in vitro expansion revealed three distinct MSC subpopulations: rapidly-, moderately- and slowly proliferating MSC clones (RPCs, MPCs and SPCs, respectively). While RPCs exhibited robust multilineage differentiation and self-renewal potency, MPCs and SPCs contained a majority of senescent cells and exhibited frequent genome errors. Single cell sorting assays followed by in vitro expansion revealed three distinct MSC subpopulations: rapidly-, moderately- and slowly proliferating MSC clones (RPCs, MPCs and SPCs, respectively). Sample: RPC, MPC and SPC (n=3).

ORGANISM(S): Homo sapiens

SUBMITTER: Yo Mabuchi

PROVIDER: E-GEOD-34484 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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LNGFR- and Thy-1-based prospective isolation of human mesenchymal stem cells reveals functionally distinct subpopulations.

Project description:Human multipotent mesenchymal stem cells (MSCs), isolated based on their adherence to plastic, show poor growth and differentiation and frequently contain contaminating cells, which limits to clarify their own characteristics. In this study, the identification of two cell surface markers, LNGFR and Thy-1, allowed the prospective isolation of highly purified clonogenic human MSCs. Furthermore, single cell sorting assays followed by in vitro expansion revealed three distinct MSC subpopulations: rapidly-, moderately- and slowly proliferating MSC clones (RPCs, MPCs and SPCs, respectively). While RPCs exhibited robust multilineage differentiation and self-renewal potency, MPCs and SPCs contained a majority of senescent cells and exhibited frequent genome errors.

2011-12-22 | GSE34484 | GEO

Whole genome transcriptomics of simvastatin treatment in Mesodermal Progenitor Cells

Project description:Whole-genome transcriptomic analysis of MPCs treated for 2 days or 17 days with simvastatin 1 uM and of the corresponding DMSO-treated controls was performed using MPCs treated 2 days or 17 days, respectively. Total RNA was isolated using the RNeasy Mini kit (Qiagen) with DNAse I digestion. RNA concentration and quality were measured using the NanoDrop ND-1000A spectrophotometer. RNA integrity was evaluated on Agilent Bioanalyzer 2100. Using 200 ng of RNA as input material, sense strand cDNA was generated with Ambion WT expression kit (PN 900671). The Affymetrix GeneChip WT Labeling Kit (PN 900671) was then used to fragment and biotin label sense target for hybridization onto Affymetrix Human Gene 1.1 ST array plates, containing 36,079 RefSeq transcripts. Hybridization Cocktail was prepared according to Affymetrix standard protocol for Gene 1.1 STArray plates. The Gene Titan Instrument system was used for hybridization, washing, staining and scanning. Gene array processing was performed at the Bioinformatics and Expression Analysis (BEA) core facility, Karolinska Institutet. Data analysis of the Affymetrix array plates results was performed with Affymetrix Expression Console (EC, version 1.1) using the following methods: (i) summarization: PLIER, (ii) background correction: PM-GCBG and (iii) normalization: Global Median. Expression levels in the treatment groups were compared to the control groups using Students t-test (2-sided, unpaired) analysis. For each time point, a list of differentially expressed (DE) genes was generated, using 2 and 0.05 as fold change and p-value cut-off values, respectively.

2015-08-31 | E-MTAB-2753 | biostudies-arrayexpress

White-to-brown metabolic conversion of human adipocytes by JAK inhibition

Project description:The rising incidence of obesity and related disorders such as diabetes and heart disease has focused considerable attention on the discovery of novel therapeutics. One promising approach has been to increase the number or activity of brown-like adipocytes in white adipose depots, as this has been shown to prevent diet-induced obesity and reduce the incidence and severity of type 2 diabetes. Thus, the conversion of fat-storing cells into metabolically active thermogenic cells has become an appealing therapeutic strategy to combat obesity. Here, we report a screening platform for the identification of small molecules capable of promoting a white-to-brown metabolic conversion in human adipocytes. We identified two inhibitors of Janus Kinase (JAK) activity with no precedent in adipose tissue biology that permanently confer brown-like metabolic activity to white adipocytes. Importantly, these metabolically converted adipocytes exhibit elevated UCP1 expression and increased mitochondrial activity. We further found that repression of interferon signalling and activation of hedgehog signalling in JAK-inactivated adipocytes contributes to the metabolic conversion observed in these cells. Our findings highlight a novel role for the JAK/STAT pathway in the control of adipocyte function and establish a platform to identify compounds for the treatment of obesity. Human pluripotent stem-cell derived mesenchymal progenitor cells (PSC-MPCs), white adipose cells (PSC-WA), and brown adipose cells (PSC-BA) were treated with DMSO (as control), a JAK3-inhibitor compound, and a SYK-inhibitor compound respectively. Transcriptomic expression profiling was performed at 24 hours and 7 days respectively. Three biological replicates are available for each condition defined by cell type, compound, and time.

2014-10-31 | E-GEOD-57896 | biostudies-arrayexpress

Olig2 defines subpopulations of retinal progenitor cells

Project description:Previous lineage analyses have shown that retinal progenitor cells (RPCs) are multipotent throughout development, and expression profiling studies have shown a great deal of molecular heterogeneity among RPCs. To determine if the molecular heterogeneity predicts that an RPC will produce particular types of progeny, clonal lineage analysis was used to investigate the progeny of a subset of RPCs, those that express the basic helix-loop-helix (bHLH) transcription factor, Olig2. In contrast to the large and complex set of clones generated by viral marking of random embryonic RPCs, the embryonic Olig2+ RPCs underwent terminal divisions, producing small clones with primarily two of the five cell types being made by the pool of RPCs at that time. The embryonically produced cell types made by Olig2+ RPCs were cone photoreceptors and horizontal cell (HC) interneurons. Moreover, the embryonic Olig2+ RPC did not make the later Olig2+ RPC. The later, postnatal Olig2+ RPCs also made terminal divisions, which were biased towards production of rod photoreceptors and amacrine cell (AC) interneurons. These data indicate that the multipotent progenitor pool is made up of distinctive types of RPCs, which have biases towards producing subsets of retinal neurons in a terminal division, with the types of neurons produced varying over time. This strategy is similar to that of the developing Drosophila melanogaster ventral nerve cord, with the Olig2+ cells behaving as ganglion mother cells. Single retinal cells were isolated in tubes containing lysis buffer, their mRNAs were reverse transcribed, and the resulting cDNAs were PCR amplified for 35 cycles. Labeled cDNA samples were hybridized to Affymetrix 430 2.0 microarrays and the data was normalized using MAS5.0 software. These cells were examined for the expression of Olig2 or other bHLH factors.

2012-04-12 | E-GEOD-37207 | biostudies-arrayexpress

Identification of differential expressed genes between P-RPCs, ESC-RPCs and Dkk1 treated ESC-RPCs through genome-wide transcript profiling

Project description:Tumor formation constitutes a major obstacle to the clinical application of embryonic stem cells (ESCs). As P-RPCs could successfully integrate into host eyes without development of teratomas or NOG, we sought to identify differentially expressed genes between P-RPCs and ESC-RPCs through genome-wide transcript profiling. Inhibition of Wnt signaling by DKK1 promotes the commitment of ESC-RPCs to more mature retinal cells and reduces the occurrence of NOG to 3%. DKK1-treated ESC-RPCs efficiently integrate to the host retina, form synaptic connections and restore visual function. Here, we report that further differentiation of ESC-derived neural progenitors into retinal progenitor cells (ESC-RPCs) completely eliminates teratomas in ocular transplantation. However, tumor-like neural overgrowth (NOG) occurs in 61% of transplanted eyes. ESC-RPCs were divided into two groups according to the differentiation stages for RNA extraction and hybridization on Affymetrix microarrays. Normal control ESC-RPCs (N) were represented the homogeneous populations of early stage expression profiles of immature ESC-RPCs. DKK1 treated ESC-RPCs (D) were represented the homogeneous populations of late stage expression profiles of further differetiated mature ESC-RPCs. To sought the pathways involved in the proliferation and oncogenesis of ESC-RPCs, the newborn C57 mice reitinal progenitor cells (R) were applied as negative control. Each group above had three independent biological repeats.

2013-04-16 | E-GEOD-34002 | biostudies-arrayexpress

Influence of Erythropoietin on Microvesicles Derived from Mesenchymal Ste cells(MSC) protecting renal function of Chronic Kidney Disease

Project description:miRNA profiles of the MSC-MVs and EPO-MVs were analyzed with a quantitative PCR (qPCR)-based array of the whole mice genome. Further analysis revealed differences in the miRNAs of 212 EPO-MVs (fold change ≥ 1.5 compared to the MSC-MVs), which constituted approximately 22.64% of all of the evaluated mouse miRNAs. Of all of the differences, 70.28% of the changes in the EPO-MV group involved upregulation To study the differential miRNA expression in MV and EPO-MV which might contributed to the better treatment in chronic kidney disease, we performed miRNA expression profiling of the culture supernatant of MSC with or without EPO incubation using the miRCURY LNA Array (v.18.0) (Exiqon, Vedbaek, Denmark).

2015-05-09 | E-GEOD-68665 | biostudies-arrayexpress

Rapid production and genetic stability of human mesenchymal progenitor cells derived from human somatic cell nuclear transfer-derived pluripotent stem cells

Project description:Pluripotent stem cell-derived mesenchymal progenitor cells (PSC-MPCs) are primarily derived through two main methods: 3-dimensional (3D) embryonic body-platform (EB formation) and 2D direct differentiation method. We recently established somatic cell nuclear transfer (SCNT)-PSC lines and showed their stemness. In the present study, we produced SCNT-PSC-MPCs using a novel direct differentiation method, and the characteristics, gene expression, and genetic stability of these MPCs were compared with those derived through the EB formation method. The recovery and purification of SCNT-PSC-Direct-MPCs were significantly accelerated compared to those of the SCNT-PSC-EB-MPCs, but both types of MPCs expressed typical surface markers and exhibited similar proliferation and differentiation potentials. Additionally, the analysis of gene expression patterns using microarrays showed very similar patterns. Moreover, array CGH analysis showed that both SCNT-PSC-Direct-MPCs and SCNT-PSC-EB-MPCs exhibited no significant differences in copy number variation (CNV) or single-nucleotide polymorphism (SNP) frequency. These results indicate that SCNT-PSC-Direct-MPCs exhibited high genetic stability even after rapid differentiation into MPCs, and the rate at which directly derived MPCs reached a sufficient number was higher than that of MPCs derived through the EB method. Therefore, we suggest that the direct method of differentiating MPCs from SCNT-PSCs can improve the efficacy of SCNT-PSCs applied to allogeneic transplantation.

2021-08-20 | GSE182415 | GEO

Mus musculus

Project description:Identification of differential expressed genes between P-RPCs, ESC-RPCs and Dkk1 treated ESC-RPCs through genome-wide transcript profiling

| PRJNA150579 | ENA

K6-Linked Ubiquitylation Signals Reactive Aldehyde-Induced RNA-Protein Crosslink Resolution

Project description:Reactive aldehydes induce the formation of RNA-protein crosslinks (RPCs), RPCs in the mRNA stall the ribosome and inhibit translation, RPCs are K6-linked ubiqutylated by RBR-type E3 ligase RNF14, RPCs are resolved in a UBXN1-VCP/p97-dependent manner

2023-11-03 | GSE240625 | GEO

Genomic aberrations in primary central nervous system lymphoma (PCNSL)

Project description:Genomic aberrations in primary central nervous system lymphoma (PCNSL). Two-condition experiment, PCNSLs vs. healthy men. Biological replicates: 12 tumors replicates, 13 peripheral blood replicates.

2010-11-13 | E-GEOD-25298 | biostudies-arrayexpress

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