RNA-seq analysis of aortic heart valves in mice
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ABSTRACT:
PROVIDER: PRJNA422421 | ENA |
REPOSITORIES: ENA
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Project description:RNA sequencing was performed to compare the transcriptome of aortic valves among 4 mouse models: fibulin-4 (Fbln4; EFEMP2 gene) knockout in endothelial cells (EC) using Tie2Cre (ECKO), Fbln4 knockout in smooth muscle cells (SMC) using SM22Cre (SMKO), EC and SMC Fbln4 double knockout (DKO), and Fbln4loxp/+ and Fbln4+/+ with SM22Cre and/or Tie2Cre used as CTRL. At 2 months old, DKO mice showed significantly thickening aortic valve leaflets than other mouse models. Therefore, this experiment was used to investigate the function of Fbln4 in aortic valve development and Fbln4 role in EC. RNAseq analysis indicates differences in gene expression in aortic valves of DKO mice compared to other models, that is enriched with EndMT process and fibrosis progression.
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Project description:The objective of this study was to identify genes differentially expressed between calcified bicuspid aortic valves (BAV) and tricuspid valves with (TAVc) and without (TAVn) aortic valve stenosis. Ten human BAV and nine TAVc were collected from male who underwent primary aortic valve replacement. Eight TAVn were obtained from male who underwent heart transplantation. mRNA levels were measured using Illumina HumanHT-12 v4 Expression BeadChip and compared between valve groups.
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Project description:Aortic valves are collected from patients with severe aortic valve stenosis undergoing aortic valve replacement at the Institut universitaire de cardiologie et de pneumologie de Québec (IUCPQ), Quebec City, Canada. From this biobank collection, transcriptomic analyses from 240 aortic valves were performed. All valves were tricuspid and had a fibro-calcific remodeling score of 3 or 4. RNA was extracted from valve leaflets and gene expression evaluated using the Illumina HumanHT-12 v4 Expression BeadChip. The main objective of this study was to perform a large-scale expression quantitative trait loci (eQTL) mapping study on human aortic valves.
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Project description:RNA-seq on aortic valves from WT vs N1-haploinsufficient telomere-shortened (generation 2 Terc-/-) mice with either healthy AVs or AV stenosis treated with control solvent or XCT790
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Project description:We explored the hypothesis that Serotonin (5HT) receptor signaling, that can be enhanced with 5HT transporter blockade with Fluoxetine (Fluox), in the aortic valve may vary based upon the biomechanical activity of the aortic valve leaflet. We used Affymetrix microarrays to study gene expression profiling of Porcine Aortic Valves (PAV) incubated under organ culture conditions for 24 hours in either a static state or with 10% cyclic stretch, simulating physiologic leaflet motion. PAV in the bioreactor with or without stretch were exposed to 5HT along or the combination 5HT plus Fluox. Fresh porcine aortic valves were obtained from a local abattoir. The three leaflets were excised from each valve and a rectangular section of tissue 15x10 mm was isolated from the central region of each valve cusp. These samples were randomized and assigned to one of four groups. The experimental groups were: 1) Static conditions with no agents added; 2) Cyclic stretch conditions with no agents added; 3) Static conditions with 5HT plus Fluox added; and 4) Cyclic stretch conditions with 5HT plus Fluox added.
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