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Epigenetic biomarkers to track differentiation of pluripotent stem cells

ABSTRACT: Epigenetic biomarkers to track differentiation of pluripotent stem cells

PROVIDER: PRJNA853755 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR19886672.fastq.gz	Fastqsanger.gz
	SRR19886673.fastq.gz	Fastqsanger.gz
	SRR19886674.fastq.gz	Fastqsanger.gz
	SRR19886675.fastq.gz	Fastqsanger.gz
	SRR19886676.fastq.gz	Fastqsanger.gz

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Epigenetic biomarkers to track differentiation of pluripotent stem cells [RNA-Seq]

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Epigenetic biomarkers to track differentiation of pluripotent stem cells [RNA-Seq]

Project description:Quality control of induced pluripotent stem cells remains a challenge. For validation of the pluripotent state, it is crucial to determine trilineage differentiation potential toward endoderm, mesoderm, and ectoderm. Here, we report GermLayerTracker, a combination of site-specific DNA methylation (DNAm) assays that serve as biomarker for early germ layer specification. CG dinucleotides (CpGs) were identified with characteristic DNAm at pluripotent state and after differentiation into endoderm, mesoderm, and ectoderm. Based on this, a pluripotency score was derived that may be indicative for differentiation capacity, as well as lineage-specific differentiation scores to monitor either directed differentiation, or self-organized multilineage differentiation in embryoid bodies. Furthermore, we established pyrosequencing assays for fast and cost-effective analysis. In the future, the GermLayerTracker could be used for quality control of pluripotent cells and to estimate lineage-specific commitment during initial differentiation events.

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Epigenetic biomarkers to track differentiation of pluripotent stem cells [methylation array]

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Epigenetic biomarkers to track differentiation of pluripotent stem cells.

Project description:Quality control of induced pluripotent stem cells remains a challenge. For validation of the pluripotent state, it is crucial to determine trilineage differentiation potential toward endoderm, mesoderm, and ectoderm. Here, we report GermLayerTracker, a combination of site-specific DNA methylation (DNAm) assays that serve as biomarker for early germ layer specification. CG dinucleotides (CpGs) were identified with characteristic DNAm at pluripotent state and after differentiation into endoderm, mesoderm, and ectoderm. Based on this, a pluripotency score was derived that tracks reprogramming and may indicate differentiation capacity, as well as lineage-specific scores to monitor either directed differentiation or self-organized multilineage differentiation in embryoid bodies. Furthermore, we established pyrosequencing assays for fast and cost-effective analysis. In the future, the GermLayerTracker could be used for quality control of pluripotent cells and to estimate lineage-specific commitment during initial differentiation events.

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Epigenetic biomarkers to track differentiation of pluripotent stem cells

Project description:This SuperSeries is composed of the SubSeries listed below.

2022-12-06 | GSE207119 | GEO

1H NMR metabolite monitoring during the differentiation of human induced pluripotent stem cells provides new insights into the molecular events that regulate embryonic chondrogenesis

Project description:The integration of cell metabolism with signalling pathways, transcription factor networks and epigenetic mediators is critical in coordinating molecular and cellular events during embryogenesis. Induced pluripotent stem cells (IPSCs) are an established model for embryogenesis, germ layer specification and cell lineage differentiation, advancing the study of human embryonic development and the translation of innovations in drug discovery, disease modelling and cell-based therapies. The metabolic regulation of IPSC pluripotency is mediated by balancing glycolysis and oxidative phosphorylation, but there is a paucity of data regarding the influence of individual metabolite changes during cell lineage differentiation. We used <sup>1</sup>H NMR metabolite fingerprinting and footprinting to monitor metabolite levels as IPSCs are directed in a three-stage protocol through primitive streak/mesendoderm, mesoderm and chondrogenic populations. Metabolite changes were associated with central metabolism, with aerobic glycolysis predominant in IPSC, elevated oxidative phosphorylation during differentiation and fatty acid oxidation and ketone body use in chondrogenic cells. Metabolites were also implicated in the epigenetic regulation of pluripotency, cell signalling and biosynthetic pathways. Our results show that <sup>1</sup>H NMR metabolomics is an effective tool for monitoring metabolite changes during the differentiation of pluripotent cells with implications on optimising media and environmental parameters for the study of embryogenesis and translational applications.

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Epigenetic Biomarkers of Aging

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Epigenetic Biomarkers of Aging

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Tracking of epigenetic changes during hematopoietic differentiation of induced pluripotent stem cells

Project description:Differentiation of induced pluripotent stem cells (iPSCs) toward hematopoietic progenitor cells (HPCs) raises high hopes for disease modelling, drug screening, and cellular therapy. Various differentiation protocols have been established to generate iPSC-derived HPCs (iHPCs) that resemble their primary counterparts in morphology and immunophenotype, whereas a systematic epigenetic comparison was yet elusive. In this study, we compared genome wide DNA methylation (DNAm) patterns of iHPCs with various different hematopoietic subsets. Furthermore, we analyzed if additional co-culture for two weeks with syngenic primary mesenchymal stromal cells (MSCs) or iPSC-derived MSCs (iMSCs) further supports epigenetic maturation toward hematopoietic lineage. After 20 days of in vitro differentiation cells revealed typical hematopoietic morphology, CD45 expression and colony forming unit (CFU) potential. DNAm changes were particularly observed in genes that are associated with hematopoietic differentiation. On the other hand, the epigenetic profiles of iHPCs remained overall very distinct from normal hematopoiesis. Co-culture with MSCs or iMSCs enhanced proliferation of iHPCs and maintenance of CFU potential. However, morphology, immunophenotype, and DNAm profiles did not indicate that additional culture expansion with stromal support increases hematopoietic differentiation. In conclusion, differentiation of iPSCs towards hematopoietic lineage remains epigenetically incomplete. These results substantiate the need to elaborate advanced differentiation regimen while DNAm profiles provide a suitable measure to track this process.

2019-01-24 | GSE119079 | GEO

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