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Intralipid protects the heart in late pregnancy against ischemia/reperfusion injury

ABSTRACT: The heart of late pregnant (LP) rodents is more prone to ischemia/reperfusion (I/R) injury compared to non-pregnant rodents. We hypothesized that Intralipid (ITLD) protects the heart in LP rodents against I/R injury. We performed genome-wide expression profiling to identify the underlying mechanisms. Female LP rat hearts were subjected to ischemia followed by reperfusion with vehicle or ITLD (one bolus of 5mg/kg).

ORGANISM(S): Rattus norvegicus

SUBMITTER: Georgios Kararigas

PROVIDER: E-GEOD-77698 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Intralipid protects the heart in late pregnancy against ischemia/reperfusion injury

Project description:The heart of late pregnant (LP) rodents is more prone to ischemia/reperfusion (I/R) injury compared to non-pregnant rodents. We hypothesized that Intralipid (ITLD) protects the heart in LP rodents against I/R injury. We performed genome-wide expression profiling to identify the underlying mechanisms.

2016-02-09 | GSE77698 | GEO

McDougal2017 - Metabolism in ischemic cardiomyocytes

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.

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Project description:Doxorubicin (DOXO), a chemotherapeutic drug, is cardiotoxic. We hypothesized that folic acid is an effective therapeutic agent in a mouse model of DOXO-induced cardiotoxicity. We performed genome-wide expression profiling to identify the underlying mechanisms. Male C57Bl6 2-mo old mice received DOXO (1x20 mg/kg, ip) or saline (sham). FA (10 mg/d) or placebo (plac) was administered 7d before DOXO administration until the end of the experiment (10d).

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2011-03-08 | E-MEXP-2971 | biostudies-arrayexpress

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Project description:Comparison of mouse left ventricular responses to oestrogen with control.

2014-04-10 | E-MEXP-3834 | biostudies-arrayexpress

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2019-04-30 | GSE9634 | GEO

Blockade of Wnt secretion by LGK974 after ischemia reperfusion injury

Project description:The LAD of C57BL6 mice were temporally occluded to induce ischemia-reperfusion injury of the heart. Mice received a daily dose of the porcupine inhibitor LGK974 starting directly after the surgery to prevent Wnt protein secretion. Control animals received a DMSO vehicle control. Hearts were extracted 48h after induction of ischemia-reperfusion injury. The infarcted area was identified and processed for RNAseq analysis.

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microRNA expression in heart tissue

Project description:Ischemia reperfusion (I/R) injury is an unavoidable event occurring during heart transplantation, leading to graft failures and lower long-term survival rate of the recipient. microRNAs are major regulators of genes. IR causes apoptosis/death of cardiomyocytes, resulting from up-regulation of apoptotic genes and down-regulation of anti-apoptotic genes which are regulated by microRNA. We used microarrays to detail the global programme of gene expression underlying cellularisation and identified distinct classes of up-regulated genes during this process. We perserved donor hearts with university of Wisconsin solution for 18h at 4C degree before being implanted into recipients to create ischemia reperfusion injury. The preserved hearts were implanted into a syngeneic recipient mice. 24h after transplantation, heart grafts were harvested for microRNA extraction.

2013-09-17 | E-GEOD-50885 | biostudies-arrayexpress

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

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