Age-Dependent Transcriptional Alterations in Cardiac Endothelial Cells [scRNA-seq]
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ABSTRACT:
PROVIDER: PRJNA687689 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR13302415.fastq.gz | Fastqsanger.gz | |||
| SRR13302416.fastq.gz | Fastqsanger.gz | |||
| SRR13302417.fastq.gz | Fastqsanger.gz | |||
| SRR13302418.fastq.gz | Fastqsanger.gz | |||
| SRR13302419.fastq.gz | Fastqsanger.gz |
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Project description:Age-Dependent Transcriptional Alterations in Cardiac Endothelial Cells
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Project description:Purpose: The goal of this study is to determine alterations in heart endothelial cell transcripts and cell populations associated with aging. Methods: Endothelial single cell mRNA profiles of 3 month and 24 month old wild-type mice were generated by 10X Genomics Results: Using an optimized data analysis workflow, we mapped about 50 thousand reads per cell Conclusions: Our study represents the first analysis of aged cardiac endothelial cell transcriptomes using single cell RNA-seq technology, identifiying specific transcripts and cell populations affected by age.
2021-05-28 | GSE163822 | GEO
Project description:Purpose: The goal of this study is to determine alterations in heart endothelial cell transcripts associated with aging. This is accomplished by comparing endothelial transcriptomes from young and aged organs (heart, brain and kidney). Methods: Endothelial mRNA profiles of 3 month and 24 month old wild-type mice were generated by next generation sequencing using libraries generated via SmartSeq V4 chemistry (Takara) and sequenced on an HiSeq 2500 (Illuina). Tophat2 with default parameters was used to align the sequenced reads against the mouse genome using the GRCm38. HTSeq python software with default parameters was used to quantify the transcripts of the aligned reads using the corresponding GRCm38 gene annotation model from Ensembl. Results: Highly enriched populations of endothelial cells (ECs) isolated from the heart, brain and kidney of young (3 months) and old (24 months) C57/BL6 mice were profiled for RNA expression via bulk RNA sequencing. Approximately 700 cardiac endothelial transcripts significantly differ by age. Gene set enrichment analysis indicated similar patterns for cellular pathway perturbations. Receptor-ligand comparisons indicated parallel alterations in age-affected circulating factors and cardiac endothelial-expressed receptors. Single-cell RNA-seq analysis identified 9 distinct endothelial cell subtypes in the heart with an age-associated population shift observed for an Aplnr-enriched endothelial cell clusters. Conclusions: Gene and pathway enrichment analyses show that age-related transcriptional response of cardiac endothelial cells is distinct from that of endothelial cells derived from the brain or kidney vascular bed. Furthermore, single-cell analysis identified 9 distinct EC subtypes, and shows that Aplnr-enriched subtype is reduced with age in mouse heart. Finally, we identify age-dysregulated genes in specific aged cardiac endothelial subtypes.
2021-05-28 | GSE163821 | GEO
Project description:Age-Dependent Transcriptional Alterations in Cardiac Endothelial Cells [bulk RNA-seq]
| PRJNA687688 | ENA
Project description:Age-induced alterations of granulopoiesis generate atypical neutrophils that aggravate stroke pathology. [scRNA-Seq 2]
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Project description:Age-induced alterations of granulopoiesis generate atypical neutrophils that aggravate stroke pathology [scRNA-Seq 1]
| PRJNA730093 | ENA
Project description:Aging is a significant risk factor for cardiovascular disease. Despite the fact that endothelial cells play critical roles in cardiovascular function and disease, the molecular impact of aging on this cell population in many organ systems remains unknown. In this study, we sought to determine age-associated transcriptional alterations in cardiac endothelial cells. Highly enriched populations of endothelial cells (ECs) isolated from the heart, brain, and kidney of young (3 mo) and aged (24 mo) C57/BL6 mice were profiled for RNA expression via bulk RNA sequencing. Approximately 700 cardiac endothelial transcripts significantly differ by age. Gene set enrichment analysis indicated similar patterns for cellular pathway perturbations. Receptor-ligand comparisons indicated parallel alterations in age-affected circulating factors and cardiac endothelial-expressed receptors. Gene and pathway enrichment analyses show that age-related transcriptional response of cardiac endothelial cells is distinct from that of endothelial cells derived from the brain or kidney vascular bed. Furthermore, single-cell analysis identified nine distinct EC subtypes and shows that the Apelin Receptor-enriched subtype is reduced with age in mouse heart. Finally, we identify age-dysregulated genes in specific aged cardiac endothelial subtypes.
| S-EPMC8321782 | biostudies-literature
Project description:Insulin-like growth factor (IGF1R) signalling has been implicated to play an important role in regulation of cardiac growth, hypertrophy and contractile function, and has been linked to the development of age related congestive heart failure. Here we address the question to what extent cardiomyocyte specific IGF1 signalling is essential for maintenance of the structural and functional integrity of the adult murine heart. To investigate the effects of IGF1 signalling in the adult heart without confounding effects due to IGF1 over-expression or adaptation during embryonic and early post-natal development, we inactivated the IGF1R by a 4-hydroxy tamoxifen inducible Cre recombinase in adult cardiac myocytes. Efficient inactivation of the IGF1R (iCMIGF1RKO) as assessed by Western analysis and real-time PCR went along with reduced IGF1-dependent AKT and GSK3β-phosphorylation. Functional analysis by conductance manometry and magnetic resonance imaging (MRI) revealed no functional alterations in young adult iCMIGF1RKO mice (age 3 month). However, when induced in aged mice (11 month) diastolic cardiac function was depressed. To address the question if insulin signalling might compensate for the defective IGF1R signalling we inactivated β-cells by streptozotocin. However, the diabetes associated functional depression was similar in controls and iCMIGF1RKO mice. Similarly, analysis of the cardiac gene expression profile on 44K microarrays did not reveal activation of overt adaptive processes. Endogenous IGF1 receptor signalling is required for conservation of cardiac function of the aging heart, but not for the integrity of cardiac structure and function of young hearts. Four samples of each group: the control group, positive for Cre recombinase, but negative for the floxed IGF-1R and the experimental group with double transgenic mice (merCremer/+ IGFloxP/IGFloxP).
2012-07-31 | E-GEOD-32936 | biostudies-arrayexpress
Project description:VEGF family members are important regulators of vascular functions. Promoting VEGFA signalling in aged mice has been shown to delay various aging phenotypes and extend the survival of aged mice. Although there is profound knowledge on functions of VEGFA, VEGFB has not been investigated in the context of cardiac aging. Our RNA data of aged mouse hearts revealed significant downregulation of Vegfb in the heart, specifically in endothelial cells and cardiomyocytes, while VEGFB expression was reduced in endothelial cells, fibroblasts and cardiomyocytes in aged human hearts. By contrast, VEGFB expression was exclusively reduced in cardiomyocytes of patients with cardiac hypertrophy. Hence, we investigated whether Vegfb gene therapy can revert age-dependent cardiac pathologies. We overexpressed Vegfb186, the soluble VEGFB isoform, via AAV9 vector transduction into 18-month-old C57Bl/6J male mice. AAV9-Vegfb treatment prevented progression age-related diastolic dysfunction and decreased cardiac fibrosis. We further found a rescue of aging-related left ventricular denervation in the hearts of AVV9-Vegfb treated old mice which was associated with an increase in heart rate variability. However, heart to body weight ratio and cardiomyocyte hypertrophy were increased in the AAV9-Vegfb treated mouse hearts, without alteration of cardiac systolic or diastolic function. Histological and transcriptomic analyses revealed that VEGFB186 induces compensatory cardiac hypertrophy which was accompanied by a rescued length-width-ratio, reduced fibrosis and the absence of cardiac inflammation. Cardiac single-nuclei RNA sequencing further suggested that AAV9-Vegfb treatment affects cardiac hypertrophy putatively via STAT3 which was validated in vitro. In conclusion, our data reveals that Vegfb overexpression partially reverses pathological alterations in the aging heart. Despite the overall improvement of the age-related cardiac phenotype, the AAV9-Vegfb-mediated induced cardiac hypertrophy which might reflect protective hypertrophy.
2024-11-30 | E-MTAB-14595 | biostudies-arrayexpress
Project description:As we age, structural changes contribute to progressive decline in organ function, which in the heart acts through poorly characterized mechanisms. Utilizing the rapidly aging fruit fly model with its significant homology to the human cardiac proteome, we found that cardiomyocytes exhibit progressive loss of Lamin C (mammalian Lamin A/C homologue) with age. Unlike other tissues and laminopathies, we observe decreasing nuclear size, while nuclear stiffness increases. Premature genetic reduction of Lamin C phenocopies aging’s effects on the nucleus, and subsequently decreases heart contractility and sarcomere organization. Surprisingly, Lamin C reduction downregulates myogenic transcription factors and cytoskeletal regulators, possibly via reduced chromatin accessibility. Subsequently, we find an adult-specific role for cardiac transcription factors and show that maintenance of Lamin C sustains their expression and prevents age-dependent cardiac decline. Our findings are conserved in aged non-human primates and mice, demonstrating age-dependent nuclear remodeling is a major mechanism contributing to cardiac dysfunction.
2022-11-01 | GSE185967 | GEO