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Whole heart transcriptional response to complete and epiblast-specfic deletion of Zic3 in 15.5 dpc mouse embryos

ABSTRACT: In order to better understand the molecular basis for the heart defects seen in Zic3 null and epiblast CKO embryos, we investigated whether complete or epiblast-specific deletion of Zic3 would impact later embryonic heart development at the transcriptional level by whole genome expression microarray.

ORGANISM(S): Mus musculus

PROVIDER: GSE41674 | GEO | 2012/12/12

SECONDARY ACCESSION(S): PRJNA177872

REPOSITORIES: GEO

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Whole heart transcriptional response to complete and epiblast-specfic deletion of Zic3 in 15.5 dpc mouse embryos

Project description:In order to better understand the molecular basis for the heart defects seen in Zic3 null and epiblast CKO embryos, we investigated whether complete or epiblast-specific deletion of Zic3 would impact later embryonic heart development at the transcriptional level by whole genome expression microarray. The whole heart was carefully dissected out from 15.5 dpc Zic3 +/y, Zic3 flox/y, Zic3 flox/y; Sox2-cre, and Zic3 -/y embryos, total RNAs were extracted and purified using RNeasy Mini Kit (QIAGEN). Spectrophotometry (NanoDrop-1000 Spectrophotometer, Thermo Fisher Scientific) and microfluidic electrophoresis (Experion Automated Electrophoresis System, Bio-Rad Laboratories) were used for RNA quality control. In vitro transcription was performed using Illumina TotalPrep RNA Amplification Kit (Applied Biosystems/Ambion). cRNAs were hybridized onto Illumina MouseWG-6 v2.0 Expression BeadChips (Illumina) per manufacturer’s instructions.

2012-12-12 | E-GEOD-41674 | biostudies-arrayexpress

ChIP-seq of Zic3 in ES-E14Tg2a embryonic stem cells after 2 days of differentiation to epiblast-like cells

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Project description:Identification of Zic3-dependent transcriptome at d1EpiLC and d2EpiLC. Gene expression was studied in the presence or absence of Zic3 (RNAi) in the Rex1GFPd2 mouse embryonic stem cell line (parental line; E14Tg2a) in d1- and d2-EpiLC differentiated states.

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Zic3 interacts with distant regulatory elements to regulate zebrafish developmental genes

Project description:Zic3 regulates early embryonic patterning in vertebrates. Its loss-of-function disrupts gastrulation, left-right patterning, and neurogenesis. We use the zebrafish as a model to study the developmental role of Zic3 in vivo. Using a combination of two genomics approaches – ChIP-seq and microarray, we identified Zic3 targets, which include genes from the Nodal and Wnt pathways, and show for the first time cis-regulation of these genes by Zic3 using in vivo enhancer assay. We uncovered a previously unrecognized link between Zic3 and the non-canonical Wnt pathway in gastrulation and left-right patterning, and identified neural pre-pattern genes as Zic3 targets during the early steps of neural induction. Zic3 preferably binds to distal intergenic regions, some of which contain evolutionarily conserved functional enhancers. Our study establishes the zebrafish as an excellent model for genome-wide study of a transcription factor in vivo.

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Zic3 ChIP-on-chip in mouse ES cells

Project description:The transcription factor Zic3 is required for maintenance of embryonic stem (ES) cell pluripotency (Lim LS et al, Mol Biol Cell. 2007;18:1348-1358). By genome-wide chromatin immunoprecipitation (ChIP-chip) in ES cells, we have identified 379 direct Zic3 targets, many of which are functionally associated with pluripotency, cell cycle, proliferation, oncogenesis and early embryogenesis.

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PLURIPOTENCY REGULATOR ZIC3 IS AN EARLY LINEAGE SPECIFIER

Project description:Sustained expression of the key pluripotency transcriptional regulators and proliferative factors is needed for the maintenance of embryonic stem cells and early progenitors of various lineages. Zic3 is one of those factors which has been shown to be important for embryonic stem cell pluripotency. Through combinatorial analysis of transcription factor binding sites and the corresponding gene-regulation, we show that Zic3 not only activates key pluripotency genes but also acts cooperatively with them in connecting important circuits of regulation in ES cell in proliferation and maintenance of early progenitors.

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Comparative analysis of gene expression in control and Zic3 knockdown mESCs differentiated to neurons

Project description:To determine the effct of Zic3 knockdown on the neural differentiation profile of mESCs

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