Genes induced in Xenopus foregut endoderm by mesoderm
Ontology highlight
ABSTRACT:
ORGANISM(S): Xenopus laevis
SUBMITTER: Alan Kenny
PROVIDER: E-GEOD-38654 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
Similar Datasets
Project description:Foregut organogenesis is regulated by inductive interactions between the endoderm and the adjacent mesoderm. We identified genes induced in the foregut progenitors by the adjacent mesoderm. We used microarrays to detail the global programme of early foregut endoderm gene expression resulting from mesoderm induction and identified distinct classes of up-regulated genes during this process.
2012-06-12 | GSE38654 | GEO
Project description:The foregut definitive endoderm is the precursor of many tissues including the liver, pancreas, thyroid, lungs, trachea and oesophagus. However, networks and pathways involved in the early development of the definitive endoderm of mammals are not well studied. To identify genes with potential roles in the early development of the foregut definitive endoderm in mouse embryos, we performed microarray analysis to compare the gene expression profile of foregut endoderm and non-endodermal tissues from early somite-stage mouse embryos. ARC/s embryos at 4- to 5-somite stages were collected and the anterior intestinal portal was isolated by digestion with trypsin and pancreatin and mechanical dissection. Ectoderm and mesoderm tissues were dissected from the head folds and the heart, and combined as the non-endoderm tissues for comparison of gene expression profiles. RNA was extracted from 15-20 pooled samples of endoderm or ectoderm plus mesoderm cells and subjected to two rounds of linear amplification and labelling according to standard methods (Affymetrix). The amplified products were hybridized to Affymetrix mouse MOE430 GeneChips. The experiment was performed twice. RNA amplification labelling, hybridization and scanning were performed by the Australian Genome Research Facility. GC-RMA data normalization and further analysis were performed using GenePattern software.
2012-03-13 | E-GEOD-36453 | biostudies-arrayexpress
Project description:Digestive system development is orchestrated by combinatorial signaling interactions between endoderm and mesoderm, but how they are integrated in the genome is poorly understood. Here we identified the Xenopus foregut and hindgut progenitor transcriptomes, which are largely conserved with mammals. Using RNA-seq and ChIP-seq we show that BMP/Smad1 regulates dorsal-ventral gene expression in both the endoderm and mesoderm, whereas Wnt/b-catenin acts as a genome-wide toggle between foregut and hindgut programs. In addition to b-catenin-Tcf promoting hindgut gene transcription, we unexpectedly observed Wnt-repressed foregut genes associated with b-catenin-binding to DNA lacking Tcf motifs, suggesting a novel direct repression. We define how BMP and Wnt signaling are integrated in the genome with Smad1 and β-catenin co-occupying DNA elements associated with hundreds of key regulatory genes. These results extend our understanding of GI organogenesis and how Wnt and BMP may coordinate genomic responses in other contexts.
2017-02-28 | GSE87653 | GEO
Project description:Digestive system development is orchestrated by combinatorial signaling interactions between endoderm and mesoderm, but how they are integrated in the genome is poorly understood. Here we identified the Xenopus foregut and hindgut progenitor transcriptomes, which are largely conserved with mammals. Using RNA-seq and ChIP-seq we show that BMP/Smad1 regulates dorsal-ventral gene expression in both the endoderm and mesoderm, whereas Wnt/b-catenin acts as a genome-wide toggle between foregut and hindgut programs. In addition to b-catenin-Tcf promoting hindgut gene transcription, we unexpectedly observed Wnt-repressed foregut genes associated with b-catenin-binding to DNA lacking Tcf motifs, suggesting a novel direct repression. We define how BMP and Wnt signaling are integrated in the genome with Smad1 and β-catenin co-occupying DNA elements associated with hundreds of key regulatory genes. These results extend our understanding of GI organogenesis and how Wnt and BMP may coordinate genomic responses in other contexts.
2017-02-28 | GSE87652 | GEO
Project description:In vertebrates the endoderm which gives rise to the epithelial lining of the digestive tract becomes regionalized along its antero-posterior axis after gastrulation. The molecular basis of the initial step of this regionalization has largely remained unclear. Using chick model, we generated high-quality transcriptomic datasets of different stages/regions of the endoderm and analyzed their molecular heterogeneity. Total RNA from HH stage 4-5 entire definitive endoderm, HH stages 10-11 foregut endoderm and HH stages 8-10 mid/hindgut endoderm were purified. 5 M-NM-<g of RNA from each sample were used to screen Affymetrix Chicken Genome Array without an amplification step.
2013-06-08 | E-GEOD-22222 | biostudies-arrayexpress
Project description:The aim of the study was to define the specific gene expression signature of pancreatic endoderm cells (PECs), by designing a strategy for generating putative PECs (PDX1+/NKX6-1+, and posterior foregut endoderm (PFG) cells (PDX1+/NKX6-1-). Cell line: PDX1-eGFP reporter cell line (PDXeG clone 170-3) generated using the HUES-4 embryonic stem cell line. Human embryonic stem cells (hESCs) were maintained on irradiated mouse embryonic fibroblasts (MEFs). Generation of a hESC-derived PDX1-eGFP reporter cell line: A PDX1-targeting vector was constructed by inserting an eGFP-pSV40-NeoR reporter cassette into the 5â² untranslated region of the PDX1 gene upstream of the PDX1 start codon (ATG), resulting in an GFP-tagged PDX1 allele. The GFP cassette was flanked by a 12.5kb homologous arm on the 5â direction and by a 3,5kb homologous arm on the 3 direction. The final targeting construct was verified by PCR, restriction analysis and sequencing. After approximately 2 weeks emerging clones were picked, expanded and analyzed by PCR. The Neomycin cassette was deleted by using a CRE expression vector (NLS-CRE-IRES-Puro) that was transiently co-transfected with a DsRED or GFP plasmid into selected targeted cloned. 24 hours post electroporation, GFP/DsRED positive single cells were FACS sorted and plated into 96-well plates. Clones were expanded and characterized for Neo excision by PCR. Differentiation protocol: hESCs cultured on MEFs were grown until 90% confluency and differentiated into definitive endoderm (DE) by using a modified version of the DâAmour protocol (D'Amour et al., 2005). The first day of differentiation, hESCs were cultured in the presence of 100ng/ml human Activin A (Peprotech) and 25ng/ml Wnt3a (R&D systems) in RPMI medium (Life Technologies). The four following days 100ng/ml human Activin A was added together with 1x B27-insulin in RPMI medium (Life Technologies). To generate posterior foregut cells, DE cells were treated with 64 ng/ml bFGF for additional 12 days. To generate pancreatic endoderm cells, DE cells were first treated with 2uM retinoic acid (RA, Sigma Aldrich) in DMEM/F12 medium containing 1x B27 +insulin (Life Technologies) for three days and then finally treated with 64 ng/ml FGF2 in combination with 100 ng/ml Noggin for the remaining 9 days.
2017-04-05 | E-MTAB-5088 | biostudies-arrayexpress
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:Anterior foregut endoderm (AFE) gives rise to many tissue types of interest for therapeutic research including the esophagus, salivary glands, lung, thymus, parathyroid and thyroid. Despite its importance, only few reports describe the generation of AFE from pluripotent stem cells (PSCs) by directed differentiation. Here, we describe a novel protocol to derive a subdomain of AFE, identified by expression of Pax9, from PSCs using small molecules and chemically defined conditions. Generation of a reporter PSC line allows isolation and characterization of Pax9+ AFE cells. When transplanted in vivo, Pax9+ AFE can form several distinct types of complex anterior foregut epithelia including mucosal glands and stratified squamous epithelium. Finally, we show that the directed differentiation protocol can be used to generate AFE from DiGeorge Syndrome patient-specific human induced PSCs, thus creating a platform to produce anterior foregut derivatives for therapy and to enable the study of disorders of the AFE. Total RNA obtained from FACS purified from in vitro dervied mouse definitive endoderm, anterior foregut and ES cells. AFE cells were derived from a 129X1/SvJ background, DE cells from 129X1/SvJ x 129S1/SV-+p+Tyr- cKitlSl-J/+ (R1 ES cells) and non reporter ES cells from a 129P2/OlaHsd background.
2013-04-15 | E-GEOD-42139 | biostudies-arrayexpress
Project description:Genes induced in Xenopus foregut endoderm by mesoderm
| PRJNA168354 | ENA
Project description:Organoid models of early tissue development have been produced for the intestine, brain, kidney and other organs, but similar approaches for the heart have been lacking. Here we generate complex, highly structured, three-dimensional heart-forming organoids (HFOs) by embedding human pluripotent stem cell aggregates in Matrigel followed by directed cardiac differentiation via biphasic WNT pathway modulation with small molecules. HFOs are composed of a myocardial layer lined by endocardial-like cells and surrounded by septum-transversum-like anlagen; they further contain spatially and molecularly distinct anterior versus posterior foregut endoderm tissues and a vascular network. The architecture of HFOs closely resembles aspects of early native heart anlagen before heart tube formation, which is known to require an interplay with foregut endoderm development. We apply HFOs to study genetic defects in vitro by demonstrating that NKX2.5-knockout HFOs show a phenotype reminiscent of cardiac malformations previously observed in transgenic mice.
2020-12-17 | GSE150051 | GEO