Project description:In this placebo-controlled randomized controlled trial, we tested whether remote ischemic preconditioning (RIPC) elicited by four 5-minute cycles of 300 mmHg of cuff inflation/deflation of the lower limb would reduce myocardial necrosis in isoflurane-anesthetized patients undergoing on-pump coronary artery bypass graft surgery. Secondary outcomes were the perioperative release of the biomarkers NTproBNP, hsCRP, S100, atrial transcriptional profiles, and short- and long-term clinical outcomes. RIPC with concomitantly applied isoflurane did not affect the release of biomarkers or clinical outcome. NTproBNP release correlated with isoflurane- but not RIPC-induced transcriptional changes.
Project description:In this placebo-controlled randomized controlled trial, we tested whether remote ischemic preconditioning (RIPC) elicited by four 5-minute cycles of 300 mmHg of cuff inflation/deflation of the lower limb would reduce myocardial necrosis in isoflurane-anesthetized patients undergoing on-pump coronary artery bypass graft surgery. Secondary outcomes were the perioperative release of the biomarkers NTproBNP, hsCRP, S100, atrial transcriptional profiles, and short- and long-term clinical outcomes. RIPC with concomitantly applied isoflurane did not affect the release of biomarkers or clinical outcome. NTproBNP release correlated with isoflurane- but not RIPC-induced transcriptional changes. For eleven randomly selected patients from each group (RIPC/CTL=no RIPC) two atrial samples were collected, one at the time of cannulation (T1) and one fifteen min after releasing the cross clamp (T2). The samples were immediately frozen in liquid nitrogen and later used for RNA isolation and subsequent microarray hybridization. Gene-level analysis was performed. the results of exon-level analysis will be published separately (only preliminary results available so far).
Project description:Anesthetic gases elicit organ protection in patients undergoing coronary artery bypass graft (CABG) surgery. This study aimed at identifying myocardial transcriptional phenotypes and anesthetic-induced changes in gene expression to predict cardiovascular biomarkers and cardiac function after off-pump CABG. Keywords: cardiac surgery, anesthetics
Project description:To investigate changes in cardiac transcription profiles caused by on-pump cardiac surgery, we collected myocardial samples, prior and after grafting, from patients undergoing on-pump coronary artery bypass grafting with cardiopulmonary bypass and cardiac arrest. The transcriptional profile of the mRNA in these samples was measured with gene array technology. Changes in transcriptional profiles can be correlated with the stress response of heart to surgery, cardiopulmonary bypass and cardiac arrest. Keywords: human, cardiac, CABG coronary surgery, gene expression, cardiopulmonary bypass. Myocardial samples were collected, prior and after grafting, from patients undergoing on-pump coronary artery bypass grafting with cardiopulmonary bypass and cardiac arrest.
Project description:Anesthetic gases elicit organ protection in patients undergoing coronary artery bypass graft (CABG) surgery. This study aimed at identifying myocardial transcriptional phenotypes and anesthetic-induced changes in gene expression to predict cardiovascular biomarkers and cardiac function after off-pump CABG. Experiment Overall Design: Patients scheduled for off-pump CABG were randomized into a group with the anesthetic gas sevoflurane (n=10) or the intravenous anesthetic propofol (n=10). Atrial samples were collected at the beginning and end of bypass surgery to determine gene expression profiles.
Project description:H3K9me2 ChIP-Seq of cardiac biopsies from the area at at risk and remote myocardium of mice subjected to ischemic preconditioning. Mice were subjected to ischemic preconditioning (IPC) through reversible ligation of the left coronary artery or a sham procedure. The procedure consisted of 5 minutes of ischemia followed by 5 minutes of reperfusion, repeated 4 times and then followed by a 30 minute reperfusion period. Biopsies were taken from the area at risk (AAR) and remote myocardium (RM) from six IPC mice
Project description:Microarray profiling of cardiac biopsies from the area at at risk and remote myocardium of mice subjected to ischemic preconditioning. Mice were subjected to ischemic preconditioning (IPC) through reversible ligation of the left coronary artery or a sham procedure. The procedure consisted of 4 minutes of ischemia followed by 4 minutes of reperfusion, repeated 4 times and then followed by a 30 minute reperfusion period. Biopsies were taken from the area at risk (AAR) and remote myocardium (RM) from two IPC mice and two sham control mice.
Project description:To investigate changes in cardiac transcription profiles caused by on-pump cardiac surgery, we collected myocardial samples, prior and after grafting, from patients undergoing on-pump coronary artery bypass grafting with cardiopulmonary bypass and cardiac arrest. The transcriptional profile of the mRNA in these samples was measured with gene array technology. Changes in transcriptional profiles can be correlated with the stress response of heart to surgery, cardiopulmonary bypass and cardiac arrest. Keywords: human, cardiac, CABG coronary surgery, gene expression, cardiopulmonary bypass.
Project description:This SuperSeries is composed of the following subset Series: GSE12485: Changes in cardiac transcription profiles following off-pump coronary revascularization surgery GSE12486: Changes in cardiac transcription profiles following on-pump coronary artery bypass grafting Refer to individual Series
Project description:To investigate changes in cardiac transcription profiles caused by off-pump cardiac surgery, we collected myocardial samples, prior and after grafting, from patients undergoing off-pump coronary revascularization surgery. The transcriptional profile of the mRNA in these samples was measured with gene array technology. Changes in transcriptional profiles can be correlated with the stress response of heart to off-pump surgery. Keywords: human, cardiac, OPCAB coronary surgery, gene expression. Myocardial samples were collected, prior and after grafting, from patients undergoing off-pump coronary artery bypass grafting.