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An Anterior Second Heart Field Enhancer Regulates the Gene Regulatory Network of the Cardiac Outflow Tract

ABSTRACT: An Anterior Second Heart Field Enhancer Regulates the Gene Regulatory Network of the Cardiac Outflow Tract

PROVIDER: PRJNA944703 | ENA |

REPOSITORIES: ENA

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An Anterior Second Heart Field Enhancer Regulates the Gene Regulatory Network of the Cardiac Outflow Tract

Project description:To identify a functional gene regulatory network that orchestrate transcriptional programs to direct proper outflow tract development, we generated transgenic mice harboring a 226bp-deletion within a GATA-dependent, highly conserved cardiac enhancer region. We then performed gene expression profiling analysis using data obtained from RNA-seq of outflow tract in wildtype and homozygous mutant littermates at embryonic day 12.5.

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Project description:We have performed conditional inactivation of mef2c in the anterior heart field (AHF) of mice and observed a phenotypic spectrum of outflow tract anomalies in the conditional mutant hearts. In an effort to identify misregulated genes in the outflow tracts of the mutants, we have performed RNA-Seq on outflow tract samples dissected from E10.5 mutant and wild-type embryos.

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Project description:KMT2D is required in the cardiac mesoderm, anterior heart field precursors and cardiomyocytes. Kmt2d deletion in cardiac mesoderm (Mesp1Cre) is embryonic lethal at E10.5 and mutants have hypoplastic hearts; Kmt2d deletion in anterior heart field precursors (Mef2cAHF::Cre) deletion is embryonic lethal at E13.5 and mutants have defects in septation of outflow tract and interventricular septum (IVS); Kmt2d deletion in cardiomyocytes (Tnnt2::Cre) deletion is embryonic lethal at E14.5 and mutants have defects in IVS septation and compact myocardium. The goal of this study is to compare changes in gene expression in these Kmt2d conditional deletion mutants and understand common or distinct pathways dysregulated in absence of KMT2D. Whole genome gene expression analysis was performed on RNA isolated from control and mutant embryonic hearts (or right ventricles and outflow tract for anterior heart field deletion samples). Libraries were prepared using Illumina TruSeq Paired-End Cluster Kit v3, and sequenced with the Illumina HiSeq 2500 system for pair-ended 100 base pairs (PE 100 bp).

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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

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

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