The complex genetics of hypoplastic left heart syndrome
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ABSTRACT:
PROVIDER: PRJNA311577 | ENA |
REPOSITORIES: ENA
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Project description:Congenital heart disease (CHD) is a prevalent birth defect affecting up to 1% of live births. While a genetic etiology is indicated by increased recurrence risk and association with chromosomal abnormalities, the genetics of CHD is poorly understood and likely complex. Here we show hypoplastic left heart syndrome (HLHS), a severe CHD with high morbidity/mortality, has a multigenic etiology. Analysis of 8 HLHS mutant mouse lines recovered from a large-scale mutagenesis screen showed no mutations are shared in common. In the *Ohia* mouse line, mutations in 2 genes, *Pcdha9*/*Sap130*, act synergistically to cause HLHS. Cardiomyocyte proliferation and differentiation defects likely act in concert with valve abnormalities to cause HLHS. Network analysis of mutations recovered in HLHS mice and 68 HLHS patients point to Notch signaling disruption, a pathway previously implicated in HLHS. These findings demonstrate large-scale mutagenesis is an effective systems approach for interrogating the complex genetics of human diseases. SUBMITTER_CITATION: Journal: Nature Genetics Title: The complex genetics of hypoplastic left heart syndrome Author names: Xiaoqin Liu1, Hisato Yagi1, Shazina Saeed1, Abha S. Bais1, George C. Gabriel1, Zhaohan Chen1, Kevin A. Peterson4, You Li1, Molly C. Schwartz1, William T. Reynolds1, Manush Saydmohammed1, Brian Gibbs1, Yijen Wu1, William Devine1, Bishwanath Chatterjee1, Nikolai T. Klena1, Dennis Kostka1, Karen L. de Mesy Bentley5, Madhavi K.Ganapathiraju2, Phillip Dexheimer11, Linda Leatherbury7, Omar Khalifa1, Anchit Bhagat1, Maliha Zahid1, William Pu8, Simon Watkins3, Paul Grossfeld9, Stephen Murray4, George A. Porter, Jr.6, Michael Tsang1, Lisa J.Martin10, D.Woodrow.Benson12, Bruce J. Aronow11, Cecilia W. Lo1
2017-04-13 | GSE77799 | GEO
Project description:Single cell transcriptome analysis was performed on one Hypoplastic Left Heart Synrome (HLHS) cell line and one control cell line.
2020-03-11 | GSE146763 | GEO
Project description:Congenital heart disease (CHD) is a prevalent birth defect affecting up to 1% of live births. While a genetic etiology is indicated by increased recurrence risk and association with chromosomal abnormalities, the genetics of CHD is poorly understood and likely complex. Here we show hypoplastic left heart syndrome (HLHS), a severe CHD with high morbidity/mortality, has a multigenic etiology. Analysis of 8 HLHS mutant mouse lines recovered from a large-scale mutagenesis screen showed no mutations are shared in common. In the *Ohia* mouse line, mutations in 2 genes, *Pcdha9*/*Sap130*, act synergistically to cause HLHS. Cardiomyocyte proliferation and differentiation defects likely act in concert with valve abnormalities to cause HLHS. Network analysis of mutations recovered in HLHS mice and 68 HLHS patients point to Notch signaling disruption, a pathway previously implicated in HLHS. These findings demonstrate large-scale mutagenesis is an effective systems approach for interrogating the complex genetics of human diseases.
2017-04-13 | GSE77798 | GEO
Project description:Hypoplastic Left Heart Syndrome Single Cell RNA Sequencing
| PRJNA611831 | ENA
Project description:Genetic Etiology of Hypoplastic Left Heart Syndrome (HLHS)
| PRJNA356955 | ENA
Project description:Complex molecular programs in specific cell lineages govern human heart development. Hypoplastic left heart syndrome (HLHS) is the most severe congenital heart defect encompassing a spectrum of left-ventricular hypoplasia occurring in association with outflow-tract obstruction. The current clinical paradigm assumes HLHS is largely of hemodynamic origin. Here, by combining whole-exome sequencing of 87 HLHS parent-offspring trios and transcriptome of cardiomycytes (CMs) from healthy and patient native ventricles at different stages of development we identified perturbations in coherent gene programs controlling ventricular muscle lineage development. Single-cell and 3D molecular/functional modeling with iPSCs demonstrated intrinsic defects in the cell-cycle/ciliogenesis/autophagy hub resulting in disrupted differentiation of early cardiac progenitor (CP) lineages and ultimate defective CM-subtype differentiation/maturation in HLHS. Moreover, premature cellcycle exit of ventricular CM prevents tissue response to cues of developmental growth leading to multinucleation/polyploidy, accumulation of DNA damage, exacerbated apoptosis, and eventually ventricle hypoplasia. Our results highlight how genetic heterogeneity in HLHS converges in perturbations of sequential cellular processes driving cardiogenesis and facilitate potential novel nodes for therapy beside surgical intervention.
2022-02-15 | PXD014812 | Pride
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.
2011-12-31 | GSE23959 | GEO
Project description: Not available
| S-EPMC5737968 | biostudies-literature
Project description:<p>To understand the genetic etiology of hypoplastic left heart syndrome (HLHS), patients with HLHS were consented and recruited, with blood drawn for DNA extraction and exome sequencing. Using the exome sequencing dataset obtained, rare coding sequence variants were recovered and enrichment analysis was carried out to identify genes and pathways that are likely to contribute to HLHS. </p>
| phs001256 | dbGaP
Project description:Hypoplastic left heart syndrome (HLHS) is one of the most devastating forms of congenital heart defects. Previous studies have only focused on intrinsic defects in the myocardium. However, this does not sufficiently explain the abnormal development of the cardiac valve, septum, and vasculature, which are known to originate from the endocardium. Here, using single-cell RNA profiling, induced pluripotent stem cells, and fetal heart tissue with an underdeveloped left ventricle, we identified a developmentally impaired endocardial cell population in HLHS. The intrinsic endocardial deficits contributed to abnormal endothelial to mesenchymal transition, NOTCH signaling, and extracellular matrix organization, all of which are key factors in valve formation. Consequentially, endocardial abnormalities conferred reduced proliferation and maturation of cardiomyocytes through a disrupted fibronectin-integrin interaction. Several known HLHS de novo mutations all contributed to the abnormal endocardial gene expression through the alteration of promoter/enhancer activities. These mechanistic discoveries provide an alternative angle for early intervention and heart regeneration in HLHS.
2020-08-17 | GSE138979 | GEO