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Transcription profile of hearts extracted from zebrafish embryos treated with SU5402 at 48 hpf

ABSTRACT: Heart formation requires input from two populations of progenitor cells - the first and second heart fields - that differentiate at distinct times and create different cardiac components. The cardiac outflow tract (OFT) is built through recruitment of late-differentiating, second heart field (SHF) -derived cardiomyocytes to the arterial pole of the heart. Mechanisms responsible for selection of an appropriate number of OFT cells from the SHF remain unclear, although several lines of evidence emphasize the importance of FGF signaling in promoting this process. Here, we examine the impact of inhibition of FGF signaling on cardiac transcription profiles in an effort to identify genes operating downstream of FGF during OFT development.

ORGANISM(S): Danio rerio

PROVIDER: GSE55540 | GEO | 2014/05/12

SECONDARY ACCESSION(S): PRJNA239951

REPOSITORIES: GEO

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Transcription profile of hearts extracted from zebrafish embryos treated with SU5402 at 48 hpf

Project description:Heart formation requires input from two populations of progenitor cells - the first and second heart fields - that differentiate at distinct times and create different cardiac components. The cardiac outflow tract (OFT) is built through recruitment of late-differentiating, second heart field (SHF) -derived cardiomyocytes to the arterial pole of the heart. Mechanisms responsible for selection of an appropriate number of OFT cells from the SHF remain unclear, although several lines of evidence emphasize the importance of FGF signaling in promoting this process. Here, we examine the impact of inhibition of FGF signaling on cardiac transcription profiles in an effort to identify genes operating downstream of FGF during OFT development. We compared hearts from embryos treated with the FGFR inhibitor SU5402 to the hearts from sibling embryos treated with DMSO. Two replicates were performed.

2014-05-12 | E-GEOD-55540 | biostudies-arrayexpress

Global gene expression changes in E9.5 cardiopharyngeal mesoderm (CPM) of Chd7 mutants versus controls

Project description:To investigate the role of Chd7 in the CPM we performed RNA-seq on two microdissections from Mesp1-Cre; Chd7 fl/fl (referred to as cKO) and control (Mesp1-Cre) embryos. The first involved the distal pharyngeal apparatus, i.e. arches two through six including the dorsal pericardial wall (DPW) which encompasses the SHF before these cells migrate to the poles of heart. For simplicity we refer to this dissection as “SHF” (we use inverted commas in this denotation to recognise the presence of other cell types). The second microdissection included the cells that have entered the heart (i.e. SHF-derived outflow tract (OFT), right ventricle (RV) and parts of the atrium, and FHF-derived left ventricle and atria). The OFT and heart tissue was collected from the same embryos (labelled “HEART”).

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Pbx4 limits vertebrate heart size and promotes pharyngeal arch artery development through partitioning progenitor fates within the second heart field and restricting proliferation

Project description:Development of the vertebrate heart requires the appropriate integration of temporally-distinct differentiating progenitor populations. While factors that promote accrual of later-differentiating second heart field (SHF)-derived cells to the outflow tract (OFT) have been intensively investigated, few signals are understood that specifically restrict the size of the vertebrate OFT. Here, we show that improper specification and proliferation of SHF progenitors in zebrafish lazarus (lzr) mutants, which lack the transcription factor Pbx4, produces enlarged hearts with a specific increase in ventricular cardiomyocytes and smooth muscle cells within the OFT. Specifically, optogenetic lineage-tracing demonstrates Pbx4 initially promotes the proper partitioning of the SHF into anterior progenitors, which contribute to the OFT, and adjacent endothelial cell progenitors, which contribute to posterior pharyngeal arch arteries. Subsequently, Pbx4 also limits the size of the SHF through repressing SHF progenitor proliferation. Single-cell RNA sequencing of nkx2.5+ cells revealed that the enlarged SHF progenitor population within Pbx4-deficient embryos assimilates characteristics of normally distinct proliferative and more anterior, differentiated cardiomyocyte populations. Therefore, the generation of proper OFT size and great arteries in vertebrates requires Pbx-dependent stratification of unique progenitor differentiation states to facilitate homeotic-like transformations and limit progenitor production within the SHF.

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Nkx2.5 regulates Jarid2 during outflow tract morphogenesis

Project description:The transcription factor Nkx2.5 is required for specification of pharyngeal arch second heart field (SHF) progenitors that contribute to outflow tract (OFT) and right ventricle (RV) formation. Multiple sets of microarray data were analyzed to identify genes that are candidate targets of Nkx2.5 in the second heart field. These sets are: 1) publicly available data for cardiothoracic tissue from E9.5 Nkx2.5 wild-type, heterozygous and homozygous embryos; 2) an analysis of mouse E10.5 pharyngeal arch tissue; 3) an analysis of mouse E12.5 heart tissue; and 4) a temporal analysis of the cardiogenic cell line P19CL6. This combined analysis identified 11 genes (Lrrn1, Elovl2, Safb, Slc39a6, Khdrbs1, Hoxb4, Fez1, Ccdc117, Jarid2, Nrcam, and Enpp3) expressed in SHF-containing pharyngeal arch tissue whose regulation is dependent on Nkx2.5 expression. Refer to individual Series

2010-05-17 | E-GEOD-17936 | biostudies-arrayexpress

HDAC1-mediated repression of the retinoic acid-responsive gene ripply3 promotes second heart field development

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2019-05-11 | GSE126747 | GEO

ChIP-seq for Gata6 and histone H3K27Ac on mouse branchial arches at E11.5.

Project description:Gata6 ChIP-seq on mouse posterior branchial arches connected to outflow tract of the heart (PBA/OFT) at embryonic day (E) 11.5. H3K27Ac ChIP-seq on mouse second branchial arch (BA2) and posterior branchial arches connected to outflow tract of the heart (PBA/OFT) at embryonic day (E) 11.5.

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Nkx2.5 regulates Jarid2 during outflow tract morphogenesis

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Expression data from the neural crest cells isolated from mouse cardiac outflow tract at E10.5

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ChIP-seq for Pbx on mouse second and posterior branchial arches at E11.5

Project description:Pbx ChIP-seq on mouse second branchial arches, and posterior branchial arches connected to outflow tract of the heart (PBA/OFT) at embryonic day (E) 11.5.

2020-10-16 | E-MTAB-8608 | biostudies-arrayexpress

ChIP-seq for Meis on mouse branchial arches at E11.5

Project description:Meis ChIP-seq on mouse second branchial arch (BA2) and posterior branchial arches connected to outflow tract of the heart (PBA/OFT) at embryonic day (E) 11.5.

2017-09-25 | E-MTAB-5536 | biostudies-arrayexpress

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