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CITE-Seq analysis of immune populations in paired human epicardial adipose tissue and right atrial appendage tissue samples

ABSTRACT: CITE-Seq analysis of immune populations in paired human epicardial adipose tissue and right atrial appendage tissue samples

PROVIDER: PRJNA1095988 | ENA |

REPOSITORIES: ENA

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CITE-Seq analysis of immune populations in paired human epicardial adipose tissue and right atrial appendage tissue samples

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Ischemic heart disease selectively modifies the right atrial appendage transcriptome

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Project description:Ischemic heart disease remains the leading cause of mortality and morbidity worldwide despite improved possibilities in medical care. Alongside interventional therapies, such as coronary artery bypass grafting (CABG), adjuvant tissue-engineered and cell-based treatments can provide regenerative improvement. Unfortunately, most of these advanced approaches require multiple lengthy and costly preparation stages without in turn delivering significant clinical benefit. Here, we investigated the effect of epicardial matrix patch-encased atrial appendage micrografts (AAMs) in a mouse model of myocardial infarction. The matrix-covered AAM patches salvaged the myocardium from infarction-induced functional tissue loss. Fibrosis was attenuated, and site-targeted proteomics revealed AAM patch-activated pathways for angiogenesis and cardiogenesis. The matrix component of the graft further supports functional myocardial recovery by ventricular unloading. The composite epicardial matrix graft encasing AAM micrografts delivers effects desirable for adjuvant cardiac therapy preserving functional cardiac tissue and restricting fibrosis after myocardial infarction.

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Project description:The goal of the present study is to determine the miRNA cargo present in epicardial extracellular vesicles. For that, epicardial cells and human primary epicardial cells were cultured. Conditioned media was isolated from mouse epicardial cells and human primary epicardial cells derived from right atrial appendages in two different states: “cobble” (inactive) cells and “spindle” (active) . RNA from EVs was isolated and sequenced to determine the miRNA content profile.

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The zebrafish heart harbors a thermogenic beige fat depot analog of human epicardial adipose tissue

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Ischemic heart disease selectively modifies the right atrial appendage transcriptome

Project description:Purpose: This study aims to identify IHD-associated signature RNAs from the atrial myocardium and evaluate their ability to reflect disease severity or cardiac surgery outcomes. Methods: We collected right atrial appendage (RAA) biopsies from 40 patients with invasive coronary angiography (ICA)-positive IHD undergoing coronary artery bypass surgery and from 8 patients ICA-negative for IHD (non-IHD) undergoing valvular surgery. Following RNA sequencing, RAA transcriptomes were analyzed against those 429 donors from the GTEx project without cardiac background. Results: The IHD transcriptome was characterized using repressed RNA expressions in pathways for cell–cell contacts and mitochondrial dysfunction. Specifically, we identified the increased expressions of the CSRNP3, FUT10, SHD, NAV2-AS4, and hsa-mir-181 genes to correlate with the complexity of coronary artery obstructions or with a functional cardiac benefit from bypass surgery. Conclusions: Our results provide an atrial myocardium–focused insight into IHD signature RNAs. The specific gene expression changes we characterized here pave the way for disease mechanism–based identification of biomarkers allowing for the early detection and treatment of IHD.

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Valvular heart disease and atrial fibrillation regulate microRNA expression profiles in left and right atria differently

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Novel Atherogenic Pathways from the Differential Transcriptiome Analysis of Diabetic Epicardial Adipose Tissue

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