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The analysis of differential gene expression after remote ischemic preconditioning of renal ischemia reperfusion injury

ABSTRACT: To investigate the mechanism by which ischemic preconditioning (IPC) produces tissue tolerance to renal ischemia reperfusion injury in a pig model

ORGANISM(S): Sus scrofa

PROVIDER: GSE72646 | GEO | 2016/09/02

SECONDARY ACCESSION(S): PRJNA294587

REPOSITORIES: GEO

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The analysis of differential gene expression after remote ischemic preconditioning of renal ischemia reperfusion injury

Project description:To investigate the mechanism by which ischemic preconditioning (IPC) produces tissue tolerance to renal ischemia reperfusion injury in a pig model 15 female Yorkshire pigs were divided into three groups: 1: no IPC and 90 minutes warm ischemia; 2: remote IPC with an early window followed by 90 min warm ischemia; 3: remote IPC with a late window followed by warm ischemia 24 hrs later. Kidney tissues were obtained after 72 hours.

2016-09-02 | E-GEOD-72646 | biostudies-arrayexpress

small RNA-Seq of rat kidney in a model of ischemic preconditioning/ischemia-reperfusion injury

Project description:Ischemic preconditioning is effective in limiting subsequent ischemic acute kidney injury in experimental models. microRNAs are an important class of post-transcriptional regulator and show promise as biomarkers of kidney injury. An evaluation was performed of the time- and dose-dependent effects of ischemic preconditioning in a rat model of functional (bilateral) ischemia-reperfusion injury. A short, repetitive sequence of ischemic preconditioning resulted in optimal protection from subsequent ischemia-reperfusion injury. A detailed characterization of microRNA expression in ischemic preconditioning/ischemia-reperfusion injury was performed by small RNA-Seq.

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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.

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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

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Vascular Permeability and Apoptosis are Separable Processes in Retinal Ischemia-Reperfusion Injury

Project description:Effects of Ischemic Preconditioning, Bevacizumab and Etanercept Ischemia and reperfusion injury provides an acute model of ischemic retinopathy that includes neurodegeneration and VEGF-dependent vascular permeability and is amenable to rapid drug testing. The distinct effects of ischemic preconditioning and bevacizumab demonstrate that the apoptotic and vascular responses to ischemia may be separated and that VEGF expression is not neuroprotective following ischemic-reperfusion. Using transient ischemia followed by reperfusion (IR) to model ischemic retinal disease, this study compares the effects of ischemic preconditioning (IPC) and therapies targeting vascular endothelial growth factor (VEGF) and tumor necrosis factor α (TNFα) on retinal apoptosis, vascular permeability and mRNA biomarker expression. Only the Ischemic Preconditioning (not Bevacizumab and Etanercept treated samples) were hybridized to arrays. Study contains 6 replicates of control and 6 IP treated retinal samples.

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Global Gene Expression in Deceased Donor Liver Transplantation with Ischemic Preconditioning

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Ischemic Pre- and Post Conditioning has pronounced effects on Gene Expression Profiles in the Rat Liver after Ischemia/Reperfusion

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2011-09-30 | E-GEOD-24430 | biostudies-arrayexpress

Global Gene Expression in Deceased Donor Liver Transplantation with Ischemic Preconditioning

Project description:The clear benefits of ischemic preconditioning (IPC) in reducing ischemia reperfusion injury (IRI) remain indistinct in human liver transplantation. To further understand the mechanistic aspects of IPC in human deceased donor liver transplantation (DDLT), we performed microarray analyses to determine global gene expression profiles associated with IPC administration. Donor and recipient characteristics in both groups were comparable. Clinical data from our study subset and larger trial were similar. IPC increased expression of 10 transcripts at either time point with roles in: antioxidant defenses, immunological response, lipid biosynthesis, and xenobiotic metabolism. IPC decreased the expression of 1 cell development related transcript. Conclusions: 1) IPC in DDLT increased the expression of antioxidant transcripts similar to studies in animal IPC, anesthetic, and remote IPC. 2) IPC increased expression of lipogenic transcripts, which may be relevant to the clinically observed increased IRI in our IPC group. 3) Our microarray findings support our clinical observations and are compatible with the varied outcomes of hepatic IPC studies in human liver transplantation. We conducted a nested sub-study in 12/101 subjects enrolled in a prospective randomized trial of 10 min IPC in DDLT during 2003-2006. Liver biopsies were performed at the end of cold storage and at 90 minutes after allograft reperfusion. Six biopsy pairs from both IPC and No IPC (STD) groups within a narrow donor risk index range were selected. Total RNA was extracted and hybridized with Affymetrix GeneChip Human Gene 1.0 ST Array. IPC effects were examined by comparing IPC vs. STD at both time points. Transcripts whose expression changed 2-fold with p<0.05 were considered significant.

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