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PRDM16 Functions as A Compact Myocardium-Enriched Transcription Factor Required to Maintain Compact Myocardial Cardiomyocyte Identity in Left Ventricle (bulk RNA-seq)

ABSTRACT: Gene expression profiling in whole heart, left ventricle (LV) and right ventricle (RV) of WT and Prdm16 conditional knockout (Prdm16cKO) mouse (Prdm16flox/flox; Xmlc2-Cre) at embryonic day 13.5 (E13.5).

ORGANISM(S): Mus musculus

PROVIDER: GSE179386 | GEO | 2021/12/20

REPOSITORIES: GEO

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PRDM16 Functions as A Compact Myocardium-Enriched Transcription Factor Required to Maintain Compact Myocardial Cardiomyocyte Identity in Left Ventricle (ChIP-seq)

Project description:Identification of genome-wide PRDM16 binding sites in E13.5 whole mouse heart, as well as in isolated left ventricle (LV) and right ventricle (RV).

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PRDM16 Functions as A Compact Myocardium-Enriched Transcription Factor Required to Maintain Compact Myocardial Cardiomyocyte Identity in Left Ventricle (Spatial Transcriptomics)

Project description:The loss of compact myocardial cardiomyocyte (compact CM) identity suggests that PRDM16 deficiency may dramatically alter the cellular composition in left ventricular (LV) compact myocardium. To test this hypothesis, we performed single-cell RNA-seq (scRNA-seq) to examine gene dysreulation in Prdm16cKO heart. We also performed Visium Spatial Transcriptomics (ST) to facilitate mapping CM clusters to their original locations in the heart. As a result, we were able to demonstrate gene misregulation in Prdm16cKO mouse mainly occurred in LV compact CM.

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PRDM16 Functions as A Compact Myocardium-Enriched Transcription Factor Required to Maintain Compact Myocardial Cardiomyocyte Identity in Left Ventricle (scRNA-seq)

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Genome-wide maps of PRDM16 binding sites and histone modifications [PRDM16 ChIP-Seq]

Project description:Identification of genome-wide PRDM16 binding, H3K27ac and H3K4me in WT and Prdm16 conditional knock-out (cKO) mouse (Emx1Ires-Cre; Prdm16flox/flox) at embryonic day 15.5.

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Project description:Identification of genome-wide PRDM16 binding, H3K27ac and H3K4me in WT and Prdm16 conditional knock-out (cKO) mouse (Emx1Ires-Cre; Prdm16flox/flox) at embryonic day 15.5.

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Genome-wide maps of PRDM16 binding sites and histone modifications [H3K27Ac ChIP-Seq]

Project description:Identification of genome-wide PRDM16 binding, H3K27ac and H3K4me in WT and Prdm16 conditional knock-out (cKO) mouse (Emx1Ires-Cre; Prdm16flox/flox) at embryonic day 15.5.

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Identifying gene expression profiles in hypoplastic left heart syndrome and age-matched normal controls

Project description:Affymetrix GeneChip Exon-1.0ST was used to study the differential gene profiles in RV (right ventricle) samples from neonates with HLHS (hypoplastic left heart syndrome) versus RV and LV (left ventricle) samples obtained from age-matched controls. Although few significant changes were observed in the genetic profiles between control LV and control RV, many genes passed the false discovery rate in comparing HLHS-RV to RV and LV control groups, with greater differential profiles noted between HLHS-RV and control RV.

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Cardiac mesenchymal stromal cells from right and left ventricles display different biological properties.

Project description:Aims. We sought to analyze the physiological differences of human C-MSC between the left ventricle (LV) versus the right ventricle (RV) . Methods and results. Autoptic cardiac specimens from LV and RV were obtained from healthy donors. Part was used for tissue sections; part was processed to obtain C-MSC. Isogenic LV and RV C-MSC were compared as for surface markers expression, cell proliferation/death ratio, differentiation capabilities and transcriptomics. Our results indicated a greater presence of C-MSC in RV vs. LV total tissue. Moreover, more cells can be obtained from RV than from LV after isolation procedures. LV and RV C-MSC are characterized by the expression of the same surface markers. Functional studies revealed RV-LV C-MSC comparable groth curves but higher apoptosis rate within the LV cells. Moreover, higher propensity of the RV to to collagen deposition was obseved. Transcriptome analysis confirmed differences in the expression of genes related to apoptosis regulation and extracellular matrix organization. Alongside, we unveiled further pathways specifically associated to LV or RV C-MSC. Conclusions. These results contribute to understand the role of RV and LV C-MSC in physiological condition. Moreover, the obtained information can unravel their differential contribution to RV or LV- specific pathologic scenarios. RNA-Seq allowed identifying novel differentially expressed genes in RV vs. LV cells, which might uncover unappreciated mechanisms underlying ventricle-specific C-MSC regulation.

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Transcriptome profiling of WT and Prdm16 mutant cells in embryonic mouse cerebral cortex.

Project description:Transcriptome profiling of radial glia, intermediate progenitors, and cortical neurons in WT and Prdm16 conditional knock-out (cKO) mouse (Emx1Ires-Cre; Prdm16flox/flox) at embryonic day 15.5.

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Identification of right heart-enriched genes in a murine model of chronic outflow tract obstruction

Project description:The right ventricle (RV) differs in several aspects from the left ventricle (LV) including its embryonic origin, physiological role and anatomical design. In contrast to LV hypertrophy, little is known about the molecular circuits, which are activated upon RV hypertrophy (RVH). We established a highly reproducible model of RVH in mice using pulmonary artery clipping (PAC), which avoids detrimental RV pressure overload and thus allows long-term survival of operated mice. Magnetic resonance imaging revealed pathognomonic changes with striking similarities to human congenital heart disease- or pulmonary arterial hypertension- patients. Comparative, microarray based transcriptome analysis of right- and left-ventricular remodeling identified distinct transcriptional responses to pressure-induced hypertrophy of either ventricle, which were mainly characterized by stronger transcriptional responses of the RV compared to the LV myocardium. Hierarchic cluster analysis revealed a RV- and LV-specific pattern of gene activity after induction of hypertrophy, however, we did not find evidence for qualitatively distinct regulatory pathways in RV compared to LV. Data mining of nearly three thousand RV-enriched genes under PAC disclosed novel potential (co)-regulators of long-term RV remodeling and hypertrophy. We reason that specific inhibitory mechanisms in RV restrict excessive myocardial hypertrophy and thereby contribute to its vulnerability to pressure overload. Alternative splicing and gene expression analysis during development of the heart and cardiomyoyte differentiation.

2011-07-07 | E-GEOD-30428 | biostudies-arrayexpress

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