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RNA sequencing of rodent myocardial tissue when subjected to a myocardial infarction (MI) or an MI and a surgical device (TRD) for 12 weeks.

ABSTRACT: Purpose: The goal of this study is to compare mRNA related cellular pathways associated with a myocardial infarction (MI) with a surgical device to prevent cardiac remodeling compared to an MI only Conclusions: RNA sequencing revealed an activation of multiple cellular pathways with the device group.

ORGANISM(S): Rattus norvegicus

PROVIDER: GSE149364 | GEO | 2020/11/30

REPOSITORIES: GEO

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RNA sequencing of rodent myocardial tissue when subjected to a myocardial infarction (MI) or an MI and a surgical device (TRD) for 12 weeks.

Project description:RNA sequencing of rodent myocardial tissue when subjected to a myocardial infarction (MI) or an MI and a surgical device (TRD) for 12 weeks.

| PRJNA628505 | ENA

mRNA Expression data from murine hearts subjected to ligation of the left anterior descending coronary artery (myocardial infarction, MI model) or sham surgery (SH)

Project description:The left anterior descending coronary artery permanent ligation model of myocardial infarction was used to study the time of day differences in genetic responses post-MI between sleep-time MI, wake-time MI, wake-sham and sleep-sham mouse hearts. The micorarray approach allows the investigation of gene expression changes of all genes in sleep-time MI vs. wake-time MI vs. sham hearts.

2018-08-06 | GSE71906 | GEO

Expression data for patients with myocardial infarction (MI) vs healthy patients

Project description:Myocardial infarction (MI) is one of the most severe manifestations of coronary artery disease (CAD) and the leading cause of death from non-infectious diseases worldwide. It is known, that the central component of CAD pathogenesis is a chronic vascular inflammation. However, the mechanisms underlying the changes that occur in T, B and NK-lymphocytes, monocytes and other immune cells during CAD and MI are still poorly understood. One of those pathogenic mechanisms might be the dysregulation of intracellular signaling pathways in the immune cells. In the present study we performed a transcriptome profiling in peripheral blood mononuclear cells of MI patients and healthy individuals. The machine learning algorithm was then used to search for MI-associated signatures, that could reflect the dysregulation of intracellular signaling pathways and be assisted in MI diagnosis and/or prognosis. ADAP2, KLRC1, MIR21, PDGFD and CD14 genes were identified as the most important signatures for the classification model with L1-norm penalty function. The classifier output quality was equal to 0.911 by Receiver Operating Characteristic metric on test data. These results were validated on two independent open GEO datasets.

2019-12-06 | GSE141512 | GEO

Identifying novel small RNA biomarkers for electrical and mechanical remodeling post-MI (myocardial infarction)

Project description:To identify novel small RNA biomarkers for electrical and mechanical remodeling post-MI

2018-10-27 | GSE121875 | GEO

Myocardial infarction (MI) primes autoreactive T cells through activation of dendritic cells

Project description:DC subsets of the murine healthy heart consisted of IRF8-dependent conventional (c)DC1, IRF4-dependent cDC2 and monocyte-derived DCs. In steady state, cardiac self-antigen α-myosin was presented in heart-draining mediastinal lymph node (mLN) by cDC1s, driving the proliferation of antigen-specific CD4+ TCR-M T cells, and their differentiation into Tregs. Following MI, all DC subsets infiltrated the heart, while only cDCs migrated to the mLN. Here, cDC2s induced TCR-M proliferation and differentiation into IL-17/IFNγ producing effector cells. Thus, cardiac specific autoreactive T cells get activated by mature DCs following myocardial infarction.

2017-03-15 | GSE94949 | GEO

Multi-omics profiling of mouse myocardial infarction

Project description:Myocardial infarction (MI), the most severe manifestation of coronary artery disease, is a multifactorial pathophysiologic process. Here, we constructed a MI mouse model through ligation of the proximal left anterior descending coronary artery. Then we detected and analysed multi-omics (transcriptome and proteome) at different time points (Control, 10 mininte, 1 hour, 6 hour, 24 hour and 72 hour) after MI. Immune-related pathway, pyroptosis pathway, and autophagy pathway r were significantly increased after MI.

2021-09-14 | GSE153494 | GEO

miRNA expression data from human myocardial infarction hearts

Project description:Sexual dimorphisms are well recognized in various cardiac diseases, including myocardial infarction (MI). MI develops later in women, but once established, it contributes more persistent symptoms and higher mortality than in men. Although mRNA-level sexual dimorphism of MI have been reported, whether miRNA transcriptome also confers such dimorphism remains unknown. Comprehensive understanding of the mRNA- and miRNA-level genetic programs underlying the heart sexual dimorphisms will expectedly improve clinical outcome by facilitating the development of gender specific treatment strategies. Here, by conducting miRNA microarray analysis of human MI samples, we set out to characterize the heart sexual dimorphisms at the level of miRNA transcriptome Human tissue samples, acquired during post-mortem examination and frozen in liquid nitrogen, were provided by the department of pathology, Tokyo Metropolitan Geriatric Hospital after the approval from the ethical committee. Age- and sex-matched cohorts were selected to compare healthy hearts to those with post-MI LV remodeling. Border zone for myocardial infarction was sampled. Total RNA was extracted using Sepasol solution (Sepasol-RNA I super G, nakalai tesque, Japan), and microarray analysis was performed using Affymetrix GeneChipÂ® miRNA 3.0 Arrays

2016-01-07 | E-GEOD-76591 | biostudies-arrayexpress

Spatially-targeted optical microproteomics timecourse of rat myocardial infarction

Project description:Myocardial infarction (MI) results from occlusion of blood supply to the heart muscle causing death of cardiac muscle cells. Following myocardial infarction (MI), scar formation acts to mechanically stabilise the injured heart to prevent rupture and death. While fibroblasts and macrophages are implicated in post-MI scar formation and maturation, their exact contributions to this process are poorly characterised, especially in the long-term (i.e., beyond 1-week post-MI). Here, we employ state-of-the-art spatially-targetted optical micro-proteomics (STOMP) to isolate proteomes of tissue fractions enriched for fibroblasts (sma+) and macrophages (cd68+) over a 6-week post-MI timecourse and compare them to whole-scar proteome. We illustrate dynamic, specific changes in sma- and cd68-enriched fraction protein composition over 1-6 weeks post-MI with some of these changes reflected in whole-infarct preparations. These results link specific cell populations to specific protein changes in whole infarct.

2023-10-31 | PXD034413 | Pride

Genome-wide analysis of gene expression in infarcted and non-infarcted left ventricle from NEIL3-deficient mice subjected to myocardial infarction

Project description:Myocardial infarction (MI) triggers a reparative response involving fibroblast proliferation and differentiation driving extracellular matrix modulation necessary to form a stabilizing scar. Recently, it was shown that a genetic variant of the base excision repair enzyme endonuclease VIII-like 3 (NEIL3) was associated with increased risk of MI in humans. Here, we report elevated myocardial NEIL3 expression in heart failure patients and marked myocardial upregulation of Neil3 following MI in mice, especially in a fibroblast-enriched cell fraction. Neil3-/- mice showed increased mortality after MI compared to WT, caused by myocardial rupture. Neil3-/- hearts displayed enrichment of mutations in genes involved in mitogenesis of fibroblasts and transcriptome analysis revealed dysregulated fibrosis. Correspondingly, proliferation of vimentin+ and aSMA+ (myo)fibroblasts was increased in Neil3-/- hearts following MI. We propose that NEIL3 operates in genomic regions crucial for regulation of cardiac fibroblast proliferation and thereby controls extracellular matrix modulation after MI.

2016-11-01 | GSE83350 | GEO

Gene expression data from myocardial infarction porcine samples

Project description:The use of cDNA microarrays has made it possible to analyze expression of thousands of genes simultaneously. We employed microarray gene expression profiling of porcine cDNA to compare myocardial gene expression in infarct core and remote myocardium at 1 week (n=3), 4 weeks (n=3), and 6 weeks (n=3) after surgically induced myocardial infarction (MI) and in sham-operated controls (n=3). More than 8,000 cDNA sequences were identified in myocardium that showed differential expression in response to MI. Different temporal and spatial patterns of gene expression were recognized in the infarct core tissue within this large set of data. Microarray gene profiling revealed candidate genes, some of them described for the first time, which elucidate changes in biological processes at different stages after MI. We evaluated temporal gene expression in a porcine model of myocardial infarction by microarray technology. Nine female pigs (Sus scrofa crossbreed Landrace x Large White) weighing 30-40 kg were subjected to experimental MI by a double-ligation of the first marginal branch of the circumflex artery. Animals were randomly sacrificed at 1 week (n=3), 4 weeks (n=3), or 6 weeks (n=3) after MI. Three paired myocardial samples from the infarct core and remote myocardium were analyzed at each time point. Myocardial samples from sham-operated animals (open-chest cardiac exposure without coronary artery ligation; n=3) were included as physiological controls.

2013-03-01 | E-GEOD-34569 | biostudies-arrayexpress

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