Homo sapiens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA135173 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR085460.fastq.gz | Fastqsanger.gz | |||
| SRR085461.fastq.gz | Fastqsanger.gz | |||
| SRR085462.fastq.gz | Fastqsanger.gz |
Items per page: 5 1 - 3 of 3 |
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Project description:Understanding the molecular mechanisms controlling early cell fate decisions in mammals is a major objective towards the development of robust methods for the differentiation of human pluripotent stem cells into clinically relevant cell types. Here, we used human embryonic stem cells (hESCs) to study specification of definitive endoderm in vitro. Using a combination of whole genome expression and ChIP-seq analyses, we established a hierarchy of transcription factors regulating endoderm specification. Importantly, pluripotency factors, namely NANOG, OCT4 and SOX2 have an essential function in this network by actively directing differentiation. Indeed, these transcription factors control the expression of EOMES, which marks the onset of endoderm specification. In turn, EOMES interacts with SMAD2/3 to initiate the transcriptional network governing endoderm formation. Together, these results provide for the first time a comprehensive molecular model connecting the transition from pluripotency to endoderm specification during mammalian development. ChIP-Seq of Eomesodermin binding in human embyonic stem cells, differentiated towards an endodermal fate for 48h in chemically-defined culture media. Includes an input DNA control. Supplementary file GSE26097_README.txt contains descriptions of the raw data files and processed data files.
2011-01-25 | E-GEOD-26097 | biostudies-arrayexpress
Project description:Understanding the molecular mechanisms controlling early cell fate decisions in mammals is a major objective towards the development of robust methods for the differentiation of human pluripotent stem cells into clinically relevant cell types. Here, we used human embryonic stem cells (hESCs) to study specification of definitive endoderm in vitro. Using a combination of whole genome expression and ChIP-seq analyses, we established a hierarchy of transcription factors regulating endoderm specification. Importantly, pluripotency factors, namely NANOG, OCT4 and SOX2 have an essential function in this network by actively directing differentiation. Indeed, these transcription factors control the expression of EOMES, which marks the onset of endoderm specification. In turn, EOMES interacts with SMAD2/3 to initiate the transcriptional network governing endoderm formation. Together, these results provide for the first time a comprehensive molecular model connecting the transition from pluripotency to endoderm specification during mammalian development.
2011-01-25 | GSE26097 | GEO
Project description:The Tbx factors Eomesodermin (Eomes) and Brachyury instruct endoderm and mesoderm specification. Both Tbx factors have common large overlap in chromatin binding sites, however their embryonic phenotypes of mutants largely differ. In this study, we delineate the distinct binding patterns and gene target sets of Eomes and Brachyury providing a molecular model of distinct fate specification programs.
2023-07-26 | GSE194192 | GEO
Project description:The definitive endoderm germ layer is the provenance of multiple internal organs, including the lungs, liver, pancreas and intestines. Molecular events driving initial endoderm germ layer specification and subsequent anterior-posterior patterning of endoderm into distinct organ primordia remain largely cryptic. Through microarray analyses, we captured genome-wide transcriptional dynamics driving successive stages of endoderm development with the intent of identifying novel regulatory genes or diagnostic markers that respectively drive or mark endoderm committment. HES3 human embryonic stem cells (hESCs) were differentiated into highly homogeneous endodermal progenitor populations, and microarray analyses were conducted of six different populations at different tiers of the endodermal lineage hierarchy: undifferentiated hESCs, anterior primitive streak (day 1 of in vitro differentiation), definitive endoderm (day 3) and anterior foregut, posterior foregut or midgut/hindgut patterned endoderm populations (day 7). Additionally, we compared hESCs differentiated using two alternative endoderm induction protocols, serum-based or AFBLy-based differentiation (both day 3 of differentiation).
2013-11-07 | E-GEOD-52158 | biostudies-arrayexpress
Project description:Epiblast cells ingress into the primitive streak, undergoing mesendoderm (MES) specification, which subsequently gives rise to the mesoderm and endoderm. Although recent advances in human organoid technology facilitating the study of early post-implantation development, robust human models that accurately recapitulate MES specification and primitive streak (PS) formation remain lacking. Here, we showed that human induced pluripotent stem cells (iPSCs) can be employed to generate three-dimensional (3D) MES organoids that closely mimic in vivo human MES specification, particularly the cells from the anterior region of primitive streak. We revealed that formation of MES organoids depended on the appearance of PTEN, and PTEN abrogation potently impaired the MES organoids-derived definitive endoderm and mesoderm specification. To elucidate the molecular mechanisms underlying the defects induced by PTEN loss, we performed integrative multi-omic analyses‒including RNA sequencing (RNA-seq), assay for transposase-accessible chromatin using sequencing (ATAC-seq), and phospho‒proteomics‒on WT and PTEN−/− MES cells. These analyses indicated retinoic acid (RA) signalling as a critical pathway suppressed by PTEN during MES lineage specification. Moreover, we identified CYP26A1, a RA-degrading enzyme, as a key downstream effector of PTEN in MES cell generation. Notably, our results demonstrated that excessive RA was detrimental, while an optimal level of RA was indispensable for MES cell generation. Overall, our MES organoids provide a valuable platform for investigating human MES specification, and our findings demonstrated PTEN as a driver of MES lineage commitment through the inhibition of RA signalling.
2026-09-14 | PXD065688 | Pride
Project description:The definitive endoderm germ layer is the provenance of multiple internal organs, including the lungs, liver, pancreas and intestines. Molecular events driving initial endoderm germ layer specification and subsequent anterior-posterior patterning of endoderm into distinct organ primordia remain largely cryptic. Through microarray analyses, we captured genome-wide transcriptional dynamics driving successive stages of endoderm development with the intent of identifying novel regulatory genes or diagnostic markers that respectively drive or mark endoderm committment.
2013-11-07 | GSE52158 | GEO
Project description:Differentiation into diverse cell lineages requires orchestration of gene regulatory networks guiding cell fate choices. Genetic factors acting through changes in transcriptional levels can contribute to cardiovascular disease risk by impacting early stages of development and have cell type-specific effects. We set out to characterize lineage trajectory progression of subpopulations and identify potential disease-related genes by examining their expression changes in single cells during early stages of cardiac lineage specification. Using 43,168 single-cell transcriptomes, we developed novel classification and trajectory analysis methods to dissect cellular composition and gene networks across five discrete time points underlying lineage derivation of mesoderm, definitive endoderm, vascular endothelium, cardiac precursors, and definitive cell types that comprise cardiomyocytes and a previously unrecognized cardiac outflow tract population.
2018-10-06 | E-MTAB-6268 | biostudies-arrayexpress
Project description:Alternative splicing is critical for development. However, its role in the specification of the three embryonic germ layers is poorly understood. By performing RNA-Seq on human embryonic stem cells (hESCs) and derived endoderm, cardiac mesoderm, and ectoderm cell lineages, we detect distinct alternative splicing programs associated with each lineage. The most prominent splicing program differences are observed between definitive endoderm and cardiac mesoderm. Integrative multi-omics analyses link each program with lineage-specific RNA binding protein regulators, and further suggest a widespread role for Quaking (QKI) in the specification of cardiac mesoderm. Remarkably, knockout of QKI disrupts the cardiac mesoderm-associated alternative splicing program and formation of myocytes. These changes likely arise in part through reduced expression of BIN1 splice variants linked to cardiac development. Collectively, our results thus uncover alternative splicing programs associated with the three germ lineages and demonstrate an important role for QKI in the formation of cardiac mesoderm.
2022-02-01 | MSV000088762 | MassIVE
Project description:This experiment was designed to determine the interactome of SMAD2/3 in human pluripotent stem cells (hPSCs). hPSCs were cultured in standard pluripotency-promoting conditions, or induced to differentiate towards the definitive endoderm lineage for 36h. Endogenous SMAD2/3 was immunoprecipitated from nuclear extracts in these two conditions using a specific antibody. Non-immune IgG immunoprecipitations were performed as negative controls. Three biological replicates per conditions were analyzed by quantitative label-free mass spectrometry.
2018-01-04 | PXD005285 | Pride
Project description: Not available
| S-EPMC2531291 | biostudies-literature