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Cooperative and antagonistic roles for Irx3 and Irx5 in cardiac morphogenesis and postnatal physiology

ABSTRACT: Analysis of the roles of Irx3 and Irx5 transcription factors in mouse heart development and postnatal heart function. Results show that show that Irx3 and Irx5 have redundant function in the in the endocardium to regulate atrioventricular canal morphogenesis and outflow tract formation. A postnatal deletion of Irx3 and Irx5 surprisingly results in a restoration of the repolarization gradient that is altered in Irx5 mutant hearts, suggesting a model whereby postnatal Irx3 activity is normally repressed by Irx5.

ORGANISM(S): Mus musculus

PROVIDER: GSE38826 | GEO | 2012/06/20

SECONDARY ACCESSION(S): PRJNA169018

REPOSITORIES: GEO

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Cooperative and antagonistic roles for Irx3 and Irx5 in cardiac morphogenesis and postnatal physiology

Project description:Analysis of the roles of Irx3 and Irx5 transcription factors in mouse heart development and postnatal heart function. Results show that show that Irx3 and Irx5 have redundant function in the in the endocardium to regulate atrioventricular canal morphogenesis and outflow tract formation. A postnatal deletion of Irx3 and Irx5 surprisingly results in a restoration of the repolarization gradient that is altered in Irx5 mutant hearts, suggesting a model whereby postnatal Irx3 activity is normally repressed by Irx5. 4 genotypes were analyzed: Irx5+/- (3 samples), Irx3-/-;Irx5+/- (4 samples), Irx5-/- (3 samples), Irx5-/-;Irx3-/- (4 samples). The Irx5+/- samples are the reference.

2012-06-19 | E-GEOD-38826 | biostudies-arrayexpress

Tao et al. BioID of Irx3 and Irx5

Project description:This submission contains the mass spectrometry files for the manuscript by Tao et al. that describes the characterization of the two transcription factors Irx3 and Irx5 and their role in regulating sister chromatid segregation. This submission contains 8 DDA files for the following baits: BirA*-FLAG-Irx3, BirA*-FLAG-Irx5, BirA*-FLAG-GFP (control) and BirA* (control).

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Irx3 and Irx5 regulate hypothalamic postnatal neurogenesis and leptin sensitivity

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Project description:Irx3 and Irx5 are important for oocyte and follicle survival within the developing ovary, but their regulation had not been elucidated. Methods: XX and XY supporting cells of the gonad were FACS-purified at E13.5, and submitted to ChIP-seq for H3K27me3 and H3 as a means to normalize across cell populations. Results: We identified TCF/LEF-binding sequences within two distal enhancers of the IrxB locus that promote β-catenin responsive ovary expression. Meanwhile, Irx3 and Irx5 transcription is suppressed within the developing testis by the presence of H3K27me3 on these same sites.

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Circular chromatin conformation capture (4C-seq) experiments for viewpoints on the promoters of Rpgrip1l/Fto, Irx3, Irx5 and Irx6 in mouse hypothalamus

Project description:We performed 4C to analyze long-range interactions between the promoters of Rpgrip1l/Fto, Irx3, Irx5 and Irx6 and a region in the first intron of the FTO gene that has been associated with obesity. 3 whole mouse hypothalami were used to obtain the data.

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Irx3 and Irx5 regulate hypothalamic postnatal neurogenesis and leptin sensitivity (DROP-seq)

Project description:Irx3 and Irx5 regulate hypothalamic postnatal neurogenesis and leptin sensitivity (DROP-seq)

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Irx3 and Irx5 regulate hypothalamic postnatal neurogenesis and leptin sensitivity (10X Genomics scRNA-seq)

Project description:Irx3 and Irx5 regulate hypothalamic postnatal neurogenesis and leptin sensitivity (10X Genomics scRNA-seq)

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Cell type-specific epigenomic analysis in the developing heart

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Irx3 and Irx5 regulate hypothalamic postnatal neurogenesis and leptin sensitivity (DROP-seq)

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Cell type-specific epigenomic analysis in the developing heart

Project description:The molecular mechanisms governing heart development provide an important framework to understand congenital heart disease. The embryonic vertebrate heart tube develops an atrioventricular canal that divides the atrial and ventricular chambers, forms atrioventricular conduction tissue and organizes valve development. To better understand the molecular mechanism underlying atrioventricular canal versus chamber myocardium expression, a double-reporter transgenic mouse line was generated in which the expression of EGFP (green fluorescent protein) and Katushka (red fluorescent protein) are selectively expressed in the atrioventricular canal and in the chamber myocardium, respectively. We assessed the genome-wide H3K27ac pattern in isolated embryonic AV canal and in chamber cardiomyocytes, respectively. EGFP and Katushka-positive cells were purified by FACS and fixed. ChIP was performed with the truemicro ChIP (Diagenode) according to the manufacturer’s protocol using the H3K27ac antibody (abcam ab4729). Chipped DNA were subjected to library preparation using the 5500 Series SOLiD™ Systems ample preparation kit (Applied Biosystems) according to manufactures recommendations and sequenced using the 5500 wildfire system (SOLiD).

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