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Peripheral blood whole transcriptome in patients with acute myocardial infarction and at follow-up

ABSTRACT: Peripheral blood whole transcriptome in patients with acute myocardial infarction and at follow-up

PROVIDER: PRJNA508391 | ENA |

REPOSITORIES: ENA

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Peripheral blood whole transcriptome in patients with acute myocardial infarction and at follow-up

Project description:There is an unmet need to develop new strategies to improve risk stratification in patients with myocardial infarction and to identify new targets for intervention. The aim of this study was to establish the unbiased peripheral blood whole transcriptome response in myocardial infarction, and to correlate it with clinical characteristics and outcome. RNA expression was determined in the acute phase of MI and at follow-up, and related to clinical phenotype and outcome.

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Project description:Despite a substantial progress in diagnosis and therapy, acute myocardial infarction (MI) is a major cause of mortality in the general population. A novel insight into the pathophysiology of myocardial infarction obtained by studying gene expression should help to discover novel biomarkers of MI and to suggest novel strategies of therapy. The aim of our study was to establish gene expression patterns in leukocytes from acute myocardial infarction patients. ST-segment elevation myocardial infarction alters expression of several groups of genes. On admission, several genes and pathways that could be directly or indirectly linked with lipid/glucose metabolism, platelet function and atherosclerotic plaque stability were affected (signaling of PPAR, IL-10, IL-6). Analysis at discharge highlighted specific immune response (upregulation of immunoglobulins). Highly significant and substantial upregulation of SOCS3 and FAM20 genes expression in the first 4-6 days of myocardial infarction in all patients is the most robust observation of our work Twenty-eight patients with ST-segment elevation myocardial infarction (STEMI) were included. The blood was collected on the 1st day of myocardial infarction, after 4-6 days, and after 6 months. Control group comprised 14 patients with stable coronary artery disease (CAD), without history of myocardial infarction. Gene expression analysis was performed with Affymetrix GeneChipM-BM-. Human Gene 1.0 ST microarrays and GCS3000 TG system.

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miRNA analysis of neonatal mice hearts after myocardial infarction

Project description:Myocardial regeneration capacity declines during the first week after birth and is linked to the adaptation to oxidative metabolism. Utilizing this regenerative window, we characterized the transcriptomic changes in myocardial injury in 1-day-old regeneration-competent and 7-day-old regeneration-compromised mice. The mice were either sham-operated or received left anterior descending coronary artery ligation to induce myocardial infarction and acute ischemic heart failure. Myocardial tissue samples were collected after 3- and 21-day follow-up period. Whole transcriptome and miRNA NGS data was analyzed. We identified specific time-dependent transcription factors and networks contributing to both regeneration competence and failure.

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Transcriptional profiling of left ventricle and peripheral blood cells in rats with post-myocardial infarction

Project description:Myocardial infarction (MI) often results in left ventricular (LV) remodeling followed by heart failure (HF). It is of great clinical importance to understand the molecular mechanisms that trigger transition from compensated LV injury to HF and to identify relevant diagnostic biomarkers. In this study, we performed transcriptional profiling of LVs in rats with a wide range of experimentally induced infarct sizes and of peripheral blood mononuclear cells (PBMCs) in animals that developed HF. We used microarrays to investigate gene expression in the left ventricle (LV) accompanying myocardial infarction and concomitant heart failure (HF) in a well validated model of post-infarcted heart failure and to evaluate their reflection in peripheral blood mononuclear cells (PBMCs) Myocardial infarction (MI) was induced in male Wistar rats by ligation of the proximal left coronary artery. The sham-operated group (control group) was subjected to the same protocol, except that the suture was not tied around the proximal left coronary artery. Sham-operated rats (n=6) and rats with small (n=6), moderate (n=6), and large (n=5) MI size were included into the experiment two months after the operation. Then, left ventricules and blood samples were obtained for RNA extraction and hybridization on Affymetrix microarrays. Microarrays were used to compare the LV and PBMCs transcriptomes of control and experimental animals. The development of heart failure was estimated by echocardiography and catheterization.

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