Project description:To study the protective effects of preoperative fasting against renal ischemia-reperfusion injury, young-lean as well as aged overweight mice were subjected to three days of fasting or ad libitum food consumption, and gene expressions in kidneys of male mice were analyzed 19 samples (5 young control, 4 young fasted, 5 aged control, 5 aged fasted), each from individual mice
Project description:To study the protective effects of preoperative fasting against renal ischemia-reperfusion injury, young-lean as well as aged overweight mice were subjected to three days of fasting or ad libitum food consumption, and gene expressions in kidneys of male mice were analyzed
Project description:Purpose: to reveal the myocardium transcriptomic profile shift pattern before/after Ischemia Reperfusion stress in young, aged, and Sesn2-knockout mice. The goals of this study are to compare the transcriptomic shift pattern among young, aged, and Sesn2-knockout to explore the caridoprotective mechanism of Sesn2 in Ischemia Reperfusion stress and the critical roles of Sesn2 in age-related adapting response to Ischemia Reperfusion stress. Methods: Myocardium transcriptome profiles of young (3-4 months) wild-type, aged (24-26 months) wild-type, and Sesn2-knockout (3-4 months) mice in normal physiological and Ischemia Reperfusion stressed conditions. Results: Sesn2 is critical to repress inflammation and maintain metabolic and mitochondria homeostasis in hearts under Ischemia Reperfusion stress, especially to aged hearts.
Project description:RNA microarray was performed to evaluate the efficacy of silicon nano-particles on renal transcriptomes of rats against ischemia reperfusion injury. We compared the transcriptomes of ischemia reperfusion injury model rats with or without oral administration of silicon nano-particles. We also tried to check whether the oral silicon nano-particles intake downregulated the biological processes related to oxidative stress.
Project description:To examine the age-related vulnerability to lung ischemia reperfusion injury, pulmonary gene expression profiles after lung ischemia reperfusion were compared between young and old mice.
Project description:Heart disease remains the leading cause of death globally. Although reperfusion following myocardial ischemia can prevent death by restoring nutrient flow, ischemia/reperfusion injury can cause significant heart damage. The mechanisms that drive ischemia/reperfusion injury are not well understood; currently, few methods can predict the state of the cardiac muscle cell and its metabolic conditions during ischemia. Here, we explored the energetic sustainability of cardiomyocytes, using a model for cellular metabolism to predict the levels of ATP following hypoxia. We modeled glycolytic metabolism with a system of coupled ordinary differential equations describing the individual metabolic reactions within the cardiomyocyte over time. Reduced oxygen levels and ATP consumption rates were simulated to characterize metabolite responses to ischemia. By tracking biochemical species within the cell, our model enables prediction of the cell’s condition up to the moment of reperfusion. The simulations revealed a distinct transition between energetically sustainable and unsustainable ATP concentrations for various energetic demands. Our model illustrates how even low oxygen concentrations allow the cell to perform essential functions. We found that the oxygen level required for a sustainable level of ATP increases roughly linearly with the ATP consumption rate. An extracellular O2 concentration of ~0.007 mM could supply basic energy needs in non-beating cardiomyocytes, suggesting that increased collateral circulation may provide an important source of oxygen to sustain the cardiomyocyte during extended ischemia. Our model provides a time-dependent framework for studying various intervention strategies to change the outcome of reperfusion.
Project description:Using renal ischemia-reperfusion injury as a model of acute kidney injury, we deteremined temporally-released miRNAs released in urinary exosomes during the injury
2019-01-05 | GSE124669 | GEO
Project description:Transcriptome Analysis of Renal Ischemia/Reperfusion Injury
