Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA258502 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR1554360.fastq.gz | Fastqsanger.gz | |||
| SRR1554361.fastq.gz | Fastqsanger.gz | |||
| SRR1554362.fastq.gz | Fastqsanger.gz | |||
| SRR1554363.fastq.gz | Fastqsanger.gz | |||
| SRR1554364.fastq.gz | Fastqsanger.gz |
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Project description:Rationale: We previously demonstrated that the transcription factor Sox6 regulates skeletal muscle biology by determining myofiber composition and muscle performance. Although the role of Sox6 and Sox5, its closest paralog, has not been ascertained in the heart, genome-wide association studies linked both Sox5 and Sox6 to cardiovascular disease. Objective: This study identifies the role of Sox5 and Sox6 in the adult mammalian heart under normal and stress conditions. Methods and Results: Using Sox5 and Sox6 cardiac-specific and Sox5 conduction system-specific knockout mice, we investigated the role of the two transcription factors in the heart under normal conditions and during cardiac stress. Sox5/6-deficient (DKO) mice displayed blunted cardiac contractility, which was present in Sox5 but not Sox6 single KO mice. DKO mice had a mild reduction in blood pressure, and conduction-specific knockout of Sox5 resulted in a reduced heart rate at baseline. After cardiac pressure overload, DKO mice showed increased lethality compared to control mice and were more prone to develop heart failure. We performed RNA deep sequencing in ventricles from DKO and control mice to identify potential Sox5/6 target genes and found altered expression of genes encoding regulators of calcium handling and cation transporters. Patch-clamping in isolated cardiomyocytes revealed shortened action potential duration in Sox5 KO cells. Conclusions: Unlike in skeletal muscle, our results suggest Sox5 but not Sox6 to be a major regulator of cardiac function and rhythm. Sox5 is essential to preserve cardiac function under normal conditions by maintaining contractility and to prevent cardiac failure after pressure overload.
2018-08-05 | GSE60538 | GEO
Project description:Mus musculus cardiac pressure overload
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Project description:IL-18 and Pressure Overload-induced Cardiac Hypertrophy
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Project description:Backgound: Cardiac pressure overload, for example in patients with aortic stenosis, induces irreversible damage in the myocardium leading to cardiac dysfunction, cardiomyocyte hypertrophy and interstitial fibrosis. We therefore hypothesized that insufficient cardiac regeneration might contribute to the progression of pressure overload dependent disease. Here, we aimed to elucidate whether pressure overload in the regenerative stage shortly after birth could lead to a more adaptive cardiac response than in the non-regenerative stage in mice.nTAC in the non-regenerative stage induced cardiac dysfunction, myocardial fibrosis and cardiomyocyte hypertrophy. In contrast, during induction of nTAC in the regenerative stage, cardiac function remained intact and this was associated with enhanced myocardial angiogenesis and innervation as well as increased cardiomyocyte proliferation, but neither hypertrophy nor fibrosis. Mechanistically, inhibition of cardiomyocyte proliferation and angiogenesis in nTAC in the regenerative phase by rapamycin triggered mortality and myocardial fibrosis, which both also similarly occurred upon inhibition of angiogenesis by PTK787, suggesting that both processes are essential for the adaptive cardiac response to nTAC. A comparative genome-wide transcriptomic analysis between hearts after nTAC in the regenerative versus the non-regenerative stage defined differentially expressed functional gene classes, and a related bioinformatics analysis suggested the transcription factor GATA4 as master regulator of the regenerative gene-program. Indeed, cardiomyocyte specific deletion of GATA4 converted the regenerative nTAC into a non-regenerative, maladaptive response.tablished a new model of neonatal pressure-overload in mice, which when applied in the regenerative postnatal stage, triggers a purely adaptive myocardial response. Employing this model to identify new regulators might lead to novel therapeutic strategies to combat pressure overload induced myocardial disease.
2019-07-26 | GSE121308 | GEO
Project description:Heart failure is a complex clinical syndrome characterized by insufficient cardiac function. It has been characterized that heart resident and infiltrated macrophages play important roles in the cardiac remodeling in response to cardiac pressure overload, however, role of T cells has not been well characterized. Here we show that CD8+T cell depletion resulted in the late stage heart protection, but induced cardioprotective hypertrophy at an early stage of heart failure caused by cardiac pressure overload. Single cell RNA sequencing analysis revealed that cardioprotective hypertrophy was characterized by an expression of mitochondrial genes and growth factor receptors genes. CD8+T cells regulated the conversion of cardiac-resident macrophages as well as infiltrated macrophages to cardioprotective macrophages which express growth factor genes including Areg, Osm and Csf1 at the early phase of cardiac pressure overload, which are essential for the myocardial adaptive response. Our results demonstrate a dynamic interplay between cardiac CD8+T cells and macrophages that is necessary for adaptation to cardiac stress, and they highlight the homeostatic functions of tissue macrophages.
2021-10-04 | GSE183024 | GEO
Project description:Differential gene expression in adrenal medulla after cardiac pressure overload
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Project description:Myocardial gene expression in response to pressure overload
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Project description:Gene and exon expression change in cardiac hypertrophy with pressure overload
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