GWAS on Calcific Aortic Valve Stenosis in Quebec (QUEBEC-CAVS)
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ABSTRACT: Calcific aortic valve stenosis (CAVS) is a common and life-threatening heart disease with no drug that can stop or delay its progression. A genome-wide association study (GWAS) on 1,009 cases and 1,017 ethnically-matched controls was performed to identify susceptibility genes for CAVS.
SECONDARY ACCESSION(S): PRJNA420787PRJNA420788
REPOSITORIES: dbGaP
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Project description:and with higher incidence if associated to bicuspid aortic valve (BAV) for unknown reasons. TAA is usually diagnosed fortuitously and the lack of effective drug therapy to delay progression and avoid dissection lies in the limited knowledge of pathophysiology. Objectives. We aimed to identify the molecular hallmarks that difference the aortic dilatation associated to bicuspid (BAV) and tricuspid aortic valve (TAV) patients while setting plasma diagnostic molecular panels valve-associated. Methods. Sporadic TAA patients and control subjects (n=91) were classified according to valve type (BAV, TAV). Vascular smooth muscle cells isolated from TAA patients’ aortas were firstly analyzed by mass spectrometry based high-throughput proteomics according to valve type. Extracellularly secreted proteins were secondly analyzed in plasma from TAA patients versus control subjects as diagnostic candidates. Results. Aneurysmal aortas from BAV patients showed a stress phenotype, weakened extracellular matrix interactions, DNA damage and affected protein homeostasis compared to TAV patients. Two plasma marker panels of sporadic TAA valveassociated were identified, showing significant correlation with aortic diameter for C1QTNF5, LAMA2, and SPARC proteins, in BAV patients, and for CP and FAP proteins, in TAV patients. Conclusions. The arterial wall of BAV patients shows a limited capacity to counteract drivers of sporadic TAA while resembling aged arteries.The molecular pathways identified here support the need of differential molecular diagnosis and therapeutic approaches for BAV and TAV patients.
2024-10-17 | PXD043062 | Pride
Project description:Aortic valve cell heterogeneity increases during Aortic Valve Stenosis (AVS) progression. We used single cell RNA sequencing (scRNA-seq) to characterize valve cell phenotype in AVS patients.
2024-12-01 | GSE273980 | GEO
Project description:GWAS on Calcific Aortic Valve Stenosis
| PRJNA420787 | ENA
Project description:GWAS on Calcific Aortic Valve Stenosis
| PRJNA420788 | ENA
Project description:Calcific Aortic Valve Disease (CAVD) is a common heart valve condition, often characterized by severe narrowing of the aortic valve. It lacks pharmaceutical treatments and typically requires aortic valve replacement surgery, imposing a significant burden on healthcare resources.This study reports the expression profile of circRNAs in the aortic valve tissues of CAVD patients and a normal control group (non-CAVD). We collected aortic valve tissue samples from three CAVD patients who underwent aortic valve replacement surgery due to severe aortic valve stenosis, as well as aortic valve samples from non-CAVD patients who either received heart transplant surgery (recipient heart) or had their aortic valve removed due to aortic dissection. Overall, our research reveals the significant role of circRNAs in the progression of CAVD. CircRNAs, a class of circular non-coding RNA molecules, are actively studied for their functions and regulatory mechanisms within cells. These findings contribute to a deeper understanding of the molecular mechanisms underlying CAVD, particularly the potential involvement of circRNAs in this disease.
2024-02-02 | GSE254393 | GEO
Project description:Aortic valve calcific disease (CAVD) is a common heart valve condition typically characterized by severe narrowing of the aortic valve. Our previous research has shown that circHIPK3 is downregulated in calcified aortic valve tissues and plays a role in regulating the progression of CAVD. To further investigate how circHIPK3 exerts its inhibitory effects on aortic valve calcification, we overexpressed circHIPK3 in aortic valve interstitial cells and conducted RNA-seq analysis, revealing that circHIPK3 regulates key factors in the Wnt signaling pathway. These findings contribute to a deeper understanding of the molecular mechanisms underlying CAVD, particularly the potential involvement of circRNAs in this disease.
2024-02-02 | GSE254394 | GEO
Project description:Purpose: Calcific aortic valve stenosis (AS) is a fatal disease with currently no medical therapy. Some genes were associated with AS, but the genetic architecture of the disease has yet to be discovered. The objective of this study was to combine genome-wide association studies (GWAS) and gene expression in human valve tissues to identify new susceptibility genes of AS. Methods: A meta-analysis was performed combining the results of two independent GWAS in 474 patients that underwent aortic valve replacement from Quebec city and 486 echocardiography cases from France. The controls consisted of 3,151 publically available individuals of European ancestry. Sixty-nine SNPs selected from the meta-analysis (p < 1 x 10-4) were followed-up for replication in a third cohort of 395 cases and 404 controls. Single marker and gene set association analyses were performed. The mRNA expression levels of susceptibility genes were evaluated in 19 human aortic valves with (n=9) and without (n=10) AS by RNA sequencing. Results: Single marker analysis identified 15 SNPs with p values lower than 1 x 10-6 in the meta-analysis near the FAR2 gene on chromosome 12. At the replication stage, none of these SNPs were confirmed and three other SNPs on chromosomes 2 and 5 reached p < 0.05. Gene set analysis revealed more meaningful association with the calcium signaling pathway enriched for genes mapped to disease-associated SNPs. Genes in this pathway including F2R, GNA14, HTR4, P2RX6, and TNNC1 were found differentially expressed in valves with and without AS. Conclusions: This integrative genomic study identified new AS susceptibility genes expressed in human valve tissue. Moderate but coordinated genetic association and expression patterns were observed for genes implicated in the calcium signaling pathway and may provide new therapeutic targets to treat this frequent and rising life-threatening disease. Samples of aortic valves were collected from 19 male patients undergoing aortic valve replacement surgery. RNA sequencing was performed using the Illumina Hiseq 2000. Three pairwise comparison among the two kind of valves were made.
2015-12-09 | E-GEOD-55492 | biostudies-arrayexpress
Project description:Aortic valve stenosis (AS) frequently causes heart disease in elderly patients and is characterized by a broad spectrum of hemodynamic phenotypes, some with life-threatening arrhythmias, and increased risk of death. The guideline for management of severe AS in patients is to improve quality of life by transaortic catheter-based valve replacement (TAVR). However, the mechanisms underlying different AS-associated hemodynamic phenotypes remain poorly understood. Proteome profiling by data-independent acquisition mass spectrometry in individual left-ventricular biopsies quantified 2.273 proteins. 160 showed statistically significant abundance changes in AS hearts compared to non-failing samples. Unbiased hierchical clustering identified four different proteotypes which broadly corresponded to hemodynamic phenotypes. As adult cardiomyocytes undergo distinct stages of subcellular remodeling, we used quantitative superresolution microscopy of candidate proteins in left-ventricular biopsies to determine the consequences of dyadic RyR2 protein changes on AS dysfunction in vivo.
2022-10-17 | PXD019594 | Pride
Project description:Calcific aortic valve disease (CAVD) is an slowly progressive calcification of heart valve which leads to aortic stenosis. The only existing treatment of CAVD is surgical replacment of calcified valve - development of anti-CAVD treatment is urgent task. For better understanding of molecular mechanisms of CAVD progression we performed proteomics analysis of osteogenic differentiation of human valve interstitial cells isolated from healthy humans or patients with CAVD.
2022-10-21 | PXD032212 | Pride
Project description:<p><strong>BACKGROUND:</strong> Calcific aortic valve stenosis (CAVS) is the most prevalent valvular heart disease in developed countries with significant morbidity and mortality. Given the poor understanding of the pathophysiological processes leading to CAVS, we utilized a joint non-targeted metabolomics and targeted lipidomics approach to better characterize the metabolic perturbations involved in its development and progression.</p><p><strong>METHODS:</strong> We collected human aortic valve tissue from 106 patients undergoing aortic valve replacement surgery. Our cohort represented aortic valvular hemodynamics from mild to severe aortic stenosis with varying degrees of valvular calcification.</p><p><strong>RESULTS:</strong> Seventy-two significantly differential (p<0.01) metabolites across different stages of CAVS severity were filtered and identified from the tissue metabolome. Each stage of valvular stenosis was characterized by a distinct metabolic signature. The top three perturbed metabolic pathways in the setting of CAVS involved glycerophospholipid metabolism, linoleic acid metabolism and primary bile acid biosynthesis. The lysophosphatidic acid species (LysoPA) exhibited significant (p<0.05) association with CAVS severity and were also found to select patients with accelerated rate of CAVS progression. Two LysoPA species namely, 18:2 LysoPA and 20:4 LysoPA, exhibited potential to serve as biomarkers of CAVS severity.</p><p><strong>CONCLUSIONS:</strong> The present study reports the largest and most comprehensive metabolomics analysis of human aortic valve stenosis that highlights the dysregulated LysoPA pathway involved in the pathogenesis of CAVS.</p>
2020-02-03 | MTBLS1267 | MetaboLights