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myocardial reperfusion injury

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https://www.readbyqxmd.com/read/28101408/in-vivo-visualization-and-ex-vivo-quantification-of-experimental-myocardial-infarction-by-indocyanine-green-fluorescence-imaging
#1
Dmitry Sonin, Garry Papayan, Evgeniia Pochkaeva, Svetlana Chefu, Sarkis Minasian, Dmitry Kurapeev, Jarle Vaage, Nickolay Petrishchev, Michael Galagudza
The fluorophore indocyanine green accumulates in areas of ischemia-reperfusion injury due to an increase in vascular permeability and extravasation of the dye. The aim of the study was to validate an indocyanine green-based technique of in vivo visualization of myocardial infarction. A further aim was to quantify infarct size ex vivo and compare this technique with the standard triphenyltetrazolium chloride staining. Wistar rats were subjected to regional myocardial ischemia (30 minutes) followed by reperfusion (n = 7)...
January 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28101167/protective-approaches-against-myocardial-ischemia-reperfusion-injury
#2
Xianchi Li, Min Liu, Rongrong Sun, Yi Zeng, Shuang Chen, Peiying Zhang
Myocardial ischemia-reperfusion is the leading cause for the events of cardiovascular disease, and is considered as a major contributor to the morbidity and mortality associated with coronary occlusion. The myocardial damage caused by ischemia-reperfusion injury constitutes the primary pathological manifestation of coronary artery disease. It results from the interaction between the substances that accumulate during ischemia and those that are delivered on reperfusion. The level of this damage can range from a small insult resulting in limited myocardial damage to a large injury culminating in myocyte death...
December 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28097005/the-cardioprotective-efficacy-of-tvp1022-against-ischemia-reperfusion-injury-and-cardiac-remodeling-in-rats
#3
Assaf Malka, Offir Ertracht, Noa Bachner-Hinenzon, Irina Reiter, Ofer Binah
Following acute myocardial infarction (MI), early and successful reperfusion is the most effective strategy for reducing infarct size and improving the clinical outcome. However, immediate restoration of blood flow to the ischemic zone results in myocardial damage, defined as "reperfusion-injury". Whereas we previously reported that TVP1022 (the S-isomer of rasagiline, FDA-approved anti-Parkinson drug) decreased infarct size 24 h post ischemia reperfusion (I/R) in rats, in this study we investigated the chronic cardioprotective efficacy of TVP1022 14 days post-I/R...
December 2016: Pharmacology Research & Perspectives
https://www.readbyqxmd.com/read/28096195/the-multifunctional-mitochondrial-epac1-controls-myocardial-cell-death
#4
Loubina Fazal, Marion Laudette, Sílvia Paula-Gomes, Sandrine Pons, Caroline Conte, Florence Tortosa, Pierre Sicard, Yannis Sainte-Marie, Malik Bisserier, Olivier Lairez, Alexandre Lucas, Jérôme Roy, Bijan Ghaleh, Jeremy Fauconnier, Jeanne Mialet-Perez, Frank Lezoualc'h
RATIONALE: Although the second messenger cyclic AMP (cAMP) is physiologically beneficial in the heart, it largely contributes to cardiac disease progression when dysregulated. Current evidence suggests that cAMP is produced within mitochondria. However, mitochondrial cAMP signaling and its involvement in cardiac pathophysiology are far from being understood. OBJECTIVE: To investigate the role of mitochondrial exchange protein directly activated by cAMP 1 (MitEpac1) in ischemia/reperfusion (I/R) injury...
January 17, 2017: Circulation Research
https://www.readbyqxmd.com/read/28093764/pre-ischemic-mitochondrial-substrate-constraint-by-inhibition-of-malate-aspartate-shuttle-preserves-mitochondrial-function-after-ischemia-reperfusion
#5
Nichlas Riise Jespersen, Takashi Yokota, Nicolaj Brejnholt Støttrup, Andreas Bergdahl, Kim Bolther Paelestik, Jonas Agerlund Povlsen, Flemming Dela, Hans Erik Bøtker
Mitochondrial dysfunction plays a central role in ischemia-reperfusion (IR) injury. The pre-ischemic administration of aminooxyacetate (AOA), an inhibitor of the malate-aspartate shuttle (MAS), provides cardioprotection against IR injury, but the underlying mechanism remains unknown. We hypothesized that a transient inhibition of the MAS during ischemia and early reperfusion could preserve mitochondrial function at later phase of reperfusion in IR-injured heart to the same extent as ischemic preconditioning (IPC), which is a well-validated cardioprotective strategy against IR injury...
January 17, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28093038/metabonomic-strategy-to-the-evaluation-of-chinese-medicine-salvia-miltiorrhiza-and-dalbergia-odorifera-interfering-myocardial-ischemia-reperfusion-injury-in-rats
#6
Fei Mu, Jialin Duan, Haixu Bian, Xiaohu Zhai, Peijin Shang, Rui Lin, Meina Zhao, Dongmei Hu, Ying Yin, Aidong Wen, Miaomiao Xi
Extract of Salvia miltiorrhiza and Dalbergia Odorifera (SM-DOO) has been traditionally used for the prevention and treatment of cardiovascular diseases. However, information regarding the pharmacodyamic material basis and potential mechanism remain unknown. Male Sprague-Dawley rats were divided into four groups: Sham, Model, Diltiazem and SM-DOO group, n=6. Rats were pretreated with homologous drugs for 7 days, then subjected to 30 min of ischemia followed by 180 min of reperfusion. Cardioprotection effects of SM-DOO on myocardial ischemia/reperfusion (MI/R) injury rats were examined by hemodynamic, infarct area, histopathology, biochemical indicators and western blot analysis...
January 16, 2017: Rejuvenation Research
https://www.readbyqxmd.com/read/28091727/intrinsic-cardiac-ganglia-and-acetylcholine-are-important-in-the-mechanism-of-ischaemic-preconditioning
#7
J M J Pickard, N Burke, S M Davidson, D M Yellon
This study aimed to investigate the role of the intrinsic cardiac nervous system in the mechanism of classical myocardial ischaemic preconditioning (IPC). Isolated perfused rat hearts were subjected to 35-min regional ischaemia and 60-min reperfusion. IPC was induced as three cycles of 5-min global ischaemia-reperfusion, and provided significant reduction in infarct size (IS/AAR = 14 ± 2% vs control IS/AAR = 48 ± 3%, p < 0.05). Treatment with the ganglionic antagonist, hexamethonium (50 μM), blocked IPC protection (IS/AAR = 37 ± 7%, p < 0...
March 2017: Basic Research in Cardiology
https://www.readbyqxmd.com/read/28090786/inorganic-nitrite-modulates-mirna-signatures-in-acute-myocardial-in-vivo-ischemia-reperfusion
#8
Ulrike B Hendgen-Cotta, Daniel Messiha, Sonja Esfeld, René Deenen, Tienush Rassaf, Matthias Totzeck
Acute myocardial infarction is the leading cause of mortality in the industrialized world. While it is essential to attempt an early reperfusion of ischemic myocardial territories, reperfusion itself adds damage to the heart, the ischemia-reperfusion (I/R) injury. Particularly the injury resulting from the very first minutes of reperfusion remains incompletely understood. MicroRNAs (miRNAs) are dynamic regulators in I/R injury. Nitric oxide (•NO) signaling, in turn, interacts with miRNA signaling. Our previous investigations showed that •NO signaling in I/R could be modulated by nitrite...
January 16, 2017: Free Radical Research
https://www.readbyqxmd.com/read/28090531/at-the-crossroads-from-bench-to-bedside-luteolin-is-a-promising-pharmacological-agent-against-myocardial-ischemia-reperfusion-injury
#9
COMMENT
Defeng Pan, Dongye Li
No abstract text is available yet for this article.
December 2016: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28087358/vascular-calcification-abrogates-the-nicorandil-mediated-cardio-protection-in-ischemia-reperfusion-injury-of-rat-heart
#10
Sriram Ravindran, Jeyashri Murali, Sunil Kumar Amirthalingam, Senthilkumar Gopalakrishnan, Gino A Kurian
The present study was aimed to determine the efficacy of nicorandil in treating cardiac reperfusion injury with an underlying co-morbidity of vascular calcification (VC). Adenine diet was used to induce VC in Wistar rat and the heart was isolated to induce global ischemia reperfusion (IR) by Langendorff method, with and without the nicorandil (7.5mg/kg) pre-treatment and compared with those fed on normal diet. The adenine-treated rats displayed abnormal ECG changes and altered mitochondrial integrity compared to a normal rat heart...
January 10, 2017: Vascular Pharmacology
https://www.readbyqxmd.com/read/28081514/role-of-mirna-1-in-regulating-connexin-43-in-ischemia-reperfusion-heart-injury-a-rat-model
#11
Bo Bian, Xue-Fang Yu, Guo-Qin Wang, Tian-Ming Teng
MiRNA-1 may participate in regulating ischemia-reperfusion injury (IRI) by affecting the expression and distribution of connexin 43 (Cx43). The aim of this study is to investigate miR-1 expression and its potential role in regulating Cx43 during ischemic postconditioning (IPOST) in a rat model. Fifty-five Wistar male rats were randomly divided into five groups: N, IR, IPOST, agomir-1, and antagomir-1 group. The hearts were perfused with the Langendorff system. The reperfusion arrhythmia (RA) and myocardial infarct size were observed and recorded...
January 3, 2017: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
https://www.readbyqxmd.com/read/28079888/antiphospholipid-antibodies-enhance-rat-neonatal-cardiomyocyte-apoptosis-in-an-in-vitro-hypoxia-reoxygenation-injury-model-via-p38-mapk
#12
Lauren T Bourke, Thomas McDonnell, James McCormick, Charis Pericleous, Vera M Ripoll, Ian Giles, Anisur Rahman, Anastasis Stephanou, Yiannis Ioannou
A significant amount of myocardial damage during a myocardial infarction (MI) occurs during the reperfusion stage, termed ischaemia/reperfusion (I/R) injury, and accounts for up to 50% of total infarcted tissue post-MI. During the reperfusion phase, a complex interplay of multiple pathways and mechanisms is activated, which ultimately leads to cell death, primarily through apoptosis. There is some evidence from a lupus mouse model that lupus IgG, specifically the antiphospholipid (aPL) antibody subset, is pathogenic in mesenteric I/R injury...
January 12, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28079228/attenuated-recovery-of-contractile-function-in-aging-hearts-following-global-ischemia-reperfusion-role-of-extracellular-hsp27-and-tlr4
#13
Lihua Ao, Yufeng Zhai, Chunhua Jin, Joseph C Cleveland, David A Fullerton, Xianzhong Meng
BACKGROUND: While cardiac functional recovery is attenuated in the elderly following cardiac surgery with obligatory global myocardial ischemia/reperfusion (I/R), the underlying mechanism remains incompletely understood. We observed previously that human and mouse myocardium releases heat shock protein (HSP) 27 during global I/R. Extracellular HSP27 induces myocardial inflammatory response and plays a role in post-ischemic cardiac dysfunction in adult mouse hearts. OBJECTIVE: This study was to determine the role of extracellular HSP27 and Toll-like receptor 4 (TLR4) in the attenuated functional recovery in aging mouse hearts following global I/R...
December 19, 2016: Molecular Medicine
https://www.readbyqxmd.com/read/28077321/camkii%C3%AE-subtypes-differentially-regulate-infarct-formation-following-ex-vivo-myocardial-ischemia-reperfusion-through-nf-%C3%AE%C2%BAb-and-tnf-%C3%AE
#14
Charles B B Gray, Takeshi Suetomi, Sunny Xiang, Erik A Blackwood, Christopher C Glembotski, Shigeki Miyamoto, B Daan Westenbrink, Joan Heller Brown
Deletion of Ca(2+)/calmodulin-dependent protein kinase II delta (CaMKIIδ) has been shown to protect against in vivo ischemia/reperfusion (I/R) injury. It remains unclear which CaMKIIδ isoforms and downstream mechanisms are responsible for the salutary effects of CaMKIIδ gene deletion. In this study we sought to compare the roles of the CaMKIIδB and CaMKIIδC subtypes and the mechanisms by which they contribute to ex vivo I/R damage. WT, CaMKIIδKO, and mice expressing only CaMKIIδB or δC were subjected to ex vivo global ischemia for 25min followed by reperfusion...
January 7, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28073832/reperfusion-therapy-with-recombinant-human-relaxin-2-serelaxin-attenuates-myocardial-infarct-size-and-nlrp3-inflammasome-following-ischemia-reperfusion-injury-via-enos-dependent-mechanism
#15
Juan Valle Raleigh, Adolfo G Mauro, Teja Devarakonda, Carlo Marchetti, Jun He, Erica Kim, Scott Filippone, Anindita Das, Stefano Toldo, Antonio Abbate, Fadi N Salloum
AIMS: The preconditioning-like infarct-sparing and anti-inflammatory effects of the peptide hormone relaxin following ischemic injury have been studied in the heart. Whether reperfusion therapy with recombinant human relaxin-2, serelaxin, reduces myocardial infarct size and attenuates the subsequent NLRP3 inflammasome activation leading to further loss of functional myocardium following ischemia/reperfusion (I/R) injury is unknown. METHODS AND RESULTS: After baseline echocardiography, adult male wild-type C57BL or eNOS knockout mice underwent myocardial infarction (MI) by coronary artery ligation for 30 min followed by 24 h reperfusion...
January 10, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28072597/reperfusion-injury-in-st-segment-elevation-myocardial-infarction-the-final-frontier
#16
Gjin Ndrepepa, Roisin Colleran, Adnan Kastrati
ST-segment elevation myocardial infarction is a major cause of morbidity and mortality worldwide. Reperfusion injury (RI) following the opening of an occluded coronary artery mitigates the effect of reperfusion by further accentuating ischemic damage and increasing infarct size. Experimental studies have shown that nearly 50% of final infarct size is attributable to RI, an elusive phenomenon that remains resistant to treatment. This review proposes a hypothesis to explain the failure of strategies that have been used in an attempt to prevent RI...
January 7, 2017: Coronary Artery Disease
https://www.readbyqxmd.com/read/28071786/functional-and-cardioprotective-effects-of-simultaneous-and-individual-activation-of-protein-kinase-a-and-epac
#17
Igor Khaliulin, Mark Bond, Andrew F James, Zara Dyar, Raheleh Amini, Jason L Johnson, M-Saadeh Suleiman
BACKGROUND AND PURPOSE: Myocardial cAMP elevation confers cardioprotection against ischaemia/reperfusion (I/R) injury. cAMP activates two independent signalling pathways, PKA and Epac. This study investigated the cardiac effects of activating PKA and/or Epac and their involvement in cardioprotection against I/R. EXPERIMENTAL APPROACH: Hearts extracted from male rats were used either for determination of PKA and PKC activation or perfused in the Langendorff mode for either cardiomyocytes isolation or used to monitor functional activity at basal levels and after 30 min global ischaemia and 2 h reperfusion...
January 10, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28068632/hydroxysafflor-yellow-a-cardioprotection-in-ischemia-reperfusion-i-r-injury-mainly-via-akt-hexokinase-ii-independent-of-erk-gsk-3%C3%AE-pathway
#18
Jia Min, Cui Wei
Hydroxysafflor yellow A (HSYA) is the main active component of Carthamus tinctorius L which has been used for hundreds of years in Chinese folk medicine in the treatment cardiovascular disease. This study was designed to investigate whether HSYA exerts cardioprotection in ischemia-reperfusion (I/R) injury heart and the mechanisms involved. The protective effect and mechanisms in myocardial ischemia reperfusion injury of HSYA was evaluated by hypoxia-recover (H/R) injury cell model which induced by hypoxia and recovered with oxygen in H9c2 cells...
January 6, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28065491/meta-analysis-of-randomized-trials-on-remote-ischemic-conditioning-during-primary-percutaneous-coronary-intervention-in-patients-with-st-segment-elevation-myocardial-infarction
#19
Ayman Elbadawi, Le Dung Ha, Ahmed S Abuzaid, Gabriele Crimi, Muhammad S Azzouz
Ischemia/reperfusion injury adversely affects the final infarct size (IS) after primary percutaneous coronary intervention (PCI) in patients with ST-segment elevation myocardial infarction (STEMI). Few studies have evaluated the role of remote ischemic conditioning (RIC) in reducing ischemia/reperfusion injury. However, the results of these studies were not consistent, and an overview of overall effectiveness of this technique in patients with STEMI is lacking. We conducted this meta-analysis to evaluate the available evidence in literature regarding the application of RIC in patients with STEMI who underwent primary PCI...
December 21, 2016: American Journal of Cardiology
https://www.readbyqxmd.com/read/28065445/colin-trial-value-of-colchicine-in-the-treatment-of-patients-with-acute-myocardial-infarction-and-inflammatory-response
#20
Mariama Akodad, Benoît Lattuca, Nicolas Nagot, Vera Georgescu, Mathilde Buisson, Jean-Paul Cristol, Florence Leclercq, Jean-Christophe Macia, Richard Gervasoni, Thien-Tri Cung, Stéphane Cade, Frédéric Cransac, Jessica Labour, Anne-Marie Dupuy, François Roubille
BACKGROUND: Inflammation is involved during acute myocardial infarction, and could be an interesting target to prevent ischaemia-reperfusion injuries. Colchicine, known for its pleiotropic anti-inflammatory effects, could decrease systemic inflammation in this context. AIMS: To evaluate the impact of colchicine on inflammation in patients admitted for ST-segment elevation myocardial infarction (STEMI). METHODS: All patients admitted for STEMI with one of the main coronary arteries occluded, and successfully treated with percutaneous coronary intervention, were included consecutively...
January 3, 2017: Archives of Cardiovascular Diseases
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