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Cardiac Organoids for Modeling Hypertrophic Cardiomyopathy

ABSTRACT: Cardiac Organoids for Modeling Hypertrophic Cardiomyopathy

PROVIDER: PRJNA1094569 | ENA |

REPOSITORIES: ENA

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Cardiac Organoids for Modeling Hypertrophic Cardiomyopathy

Project description:BACKGROUND: MYBPC3 is one of the most mutated gene known to cause hypertrophic cardiomyopathy (HCM). However, the molecular mechanisms of how mutations in MYBPC3 lead to the onset and progression of HCM are poorly understood. Thus, advancing in-vitro studies to define these mechanisms of mutations leading to HCM are still warranted. Thus, the primary objective of this study was to investigate the molecular mechanisms underlying the pathogenesis of HCM associated with MYBPC3 mutation utilizing isogenic human-induced pluripotent stem cell (hiPSC)-derived cardiac organoids (hCOs).

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Project description:Cardiac Organoids for Cardiomyopathy

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Human Hypertrophic Cardiomyopathy mRNA Profiling.

Project description:Cardiac biopsies were obtained from hypertrophic cardiomyopathy (HCM) patients and controls and subjected to mRNA profiling.

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Alteration in Tyrosine Phosphorylation of Cardiac Proteome and EGFR Pathway Contribute to Hypertrophic Cardiomyopathy

Project description:Alterations of serine/threonine phosphorylation of the cardiac proteome are a hallmark of heart failure. However, the contribution of tyrosine phosphorylation (pTyr) to the pathogenesis of cardiac hypertrophy remains unclear. We use global mapping to discover and quantify site-specific pTyr in two cardiac hypertrophic mouse models, i.e., cardiac overexpression of ErbB2 (TgErbB2) and myosin heavy chain R403Q (R403Q-aMyHC Tg), compared to control hearts. From this, there are significant phosphoproteomic alterations in TgErbB2 mice in right ventricular cardiomyopathy, hypertrophic cardiomyopathy (HCM), and dilated cardiomyopathy (DCM) pathways. On the other hand, R403Q-aMyHC Tg mice indicated that the EGFR1 pathway is central for cardiac hypertrophy, along with angiopoietin, ErbB, growth hormone, and chemokine signaling pathways activation. Surprisingly, most myofilament proteins have downregulation of pTyr rather than upregulation. Kinase-substrate enrichment analysis (KSEA) shows a marked downregulation of MAPK pathway activity downstream of k-Ras in TgErbB2 mice and activation of EGFR, focal adhesion, PDGFR, and actin cytoskeleton pathways. In vivo ErbB2 inhibition by AG-825 decreases cardiomyocyte disarray. Serine/threonine and tyrosine phosphoproteome confirms the above-described pathways and the effectiveness of AG-825 treatment. Thus, altered pTyr may play a regulatory role in cardiac hypertrophic models.

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Project description:This study used TMT-pro method to look for phosphoproteomic differences in heart tissue of patients with hypertrophic cardiomyopathy and controls

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MicroRNA Profiling of Surgical Myectomy Tissue from Patients with Hypertrophic Cardiomyopathy

Project description:Using a high-throughput gene expression profiling technology, we have illuminated novel potential microRNA (miRNA) components of the molecular disease process underlying human hypertrophic cardiomyopathy (HCM). It is hoped that this will fuel future research endeavors that will eventually uncover the role miRNAs may play in the phenotypic heterogeneity of the disease, and thus, provide potential tools for identifying patients with benign versus malignant forms of the disease. Case (n = 107)-Control (n=20) study comparing the microRNA transcriptome of cardiac tissues from patients with hypertrophic cardiomyopathy to the microRNA transcriptome of control donor cardiac tissues.

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Project description:Using a high-throughput gene expression profiling technology, we have been able to develop new hypotheses regarding the molecular pathogenic mechanisms of human hypertrophic cardiomyopathy (HCM). It is hoped that these hypotheses, among others generated by this data, will fuel future research endeavors that will uncover novel biomarkers, prognostic indicators, and therapeutic targets to improve our ability to diagnose, counsel, and treat patients with this highly heterogeneous and potentially life-threatening condition. Case-control study comparing the messenger RNA transcriptome of cardiac tissues from patients with hypertrophic cardiomyopathy to the transcriptome of control donor cardiac tissues.

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