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Infarction size

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https://www.readbyqxmd.com/read/29166724/-beneficial-effects-of-schisandrin-b-on-the-cardiac-structure-and-function-in-a-mice-model-of-myocardial-infarction
#1
P S Chen, J Liu, H Y Meng, P Wu, Z J Yang
Objective: To investigate whether Schisandrin B (Sch B) could improve cardiac structure and function in myocardial infarction (MI) mice and related mechanisms. Methods: Male C57BL/6J mice were randomized into sham (n=8), MI+ Sch B (n=24, 80 mg·kg(-1)·d(-1) per gavage) or MI+ vehicle (n=24, equal volume). After treatment for 3 weeks, cardiac function was detected by echocardiography measurement.Infarction size was measured by Evans blue and TTC staining.HE and Masson trichrome staining were used to observe the myocardial inflammation, structure and fibrosis...
November 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/29166703/in-hospital-outcomes-in-invasively-managed-acute-myocardial-infarction-patients-who-receive-morphine
#2
Cian P McCarthy, Vijeta Bhambhani, Eugene Pomerantsev, Jason H Wasfy
OBJECTIVE: We aimed to analyze the association between morphine and in-hospital outcomes in invasively managed ST elevation myocardial infarction (STEMI) and non-ST elevation acute coronary syndrome (NSTE-ACS) patients. BACKGROUND: Morphine is commonly used for analgesia in the setting of acute coronary syndromes (ACS); however, recently its utility in ACS has come under closer scrutiny. METHODS: We identified all STEMI and NSTE-ACS patients undergoing coronary angiogram +/- percutaneous intervention between January 2009 and July 2016 in our center and recorded patient characteristics and inpatient outcomes...
November 22, 2017: Journal of Interventional Cardiology
https://www.readbyqxmd.com/read/29166571/protective-cerebrovascular-effects-of-hydroxysafflor-yellow-a-hsya-on-ischemic-stroke
#3
Yang Sun, Dong-Ping Xu, Zhen Qin, Peng-Yuan Wang, Bo-Han Hu, Jian-Guang Yu, Yong Zhao, Ben Cai, Yong-Ling Chen, Min Lu, Jian-Guo Liu, Xia Liu
The purpose of the present work was designed to explore protective cerebrovascular effects of hydroxysafflor yellow A (HSYA), and provide preclinical efficacy and mechanism data for its possible application in patients with cerebral ischemia. The protective effect of HSYA on ischemic stroke was evaluated by infarct sizes and neurological scores in Sprague-Dawley (SD) rats with middle cerebral artery occlusion (MCAO). Cerebrovascular permeability was detected by Evans blue dye leakage in MCAO rats. Cerebral blood flow, as well as blood pressure and heart rate were monitored using flow probes in Beagle dogs...
November 19, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29166459/could-infarct-location-predict-the-long-term-functional-outcome-in-childhood-arterial-ischemic-stroke
#4
Mauricio López-Espejo, Marta Hernández-Chávez
OBJECTIVE: To explore the influence of infarct location on long-term functional outcome following a first-ever arterial ischemic stroke (AIS) in non-neonate children. METHOD: The MRIs of 39 children with AIS (median age 5.38 years; 36% girls; mean follow-up time 5.87 years) were prospectively evaluated. Infarct location was classified as the absence or presence of subcortical involvement. Functional outcome was measured using the modified Rankin scale (mRS) for children after the follow-up assessment...
October 2017: Arquivos de Neuro-psiquiatria
https://www.readbyqxmd.com/read/29166391/early-kinetics-of-serum-interleukine-17a-and-infarct-size-in-patients-with-reperfused-acute-st-elevated-myocardial-infarction
#5
Thomas Bochaton, Nathan Mewton, NDieme Thiam, Fabien Lavocat, Delphine Baetz, Nathalie Dufay, Cyril Prieur, Eric Bonnefoy-Cudraz, Pierre Miossec, Michel Ovize
BACKGROUND: Recently, it was shown that interleukin-17A (IL-17A) is involved in the pathophysiology of reperfusion injury and associated with infarct size (IS) in experimental models of myocardial infarction. Our aim was to evaluate whether the IL-17A serum level and the IL-17A active fraction was correlated with IS in humans. METHODS: 101 patients presenting with a ST-elevated Myocardial Infarction (STEMI) referred for primary percutaneous coronary intervention (PPCI) and 10 healthy controls were included...
2017: PloS One
https://www.readbyqxmd.com/read/29163339/predictors-of-infarct-growth-in-patients-with-large-vessel-occlusion-treated-with-endovascular-therapy
#6
Claus Z Simonsen, Irene K Mikkelsen, Sanja Karabegovic, Pia Kjaer Kristensen, Albert J Yoo, Grethe Andersen
Introduction: Endovascular therapy (EVT) is now evidence based in anterior circulation stroke caused by large vessel occlusion. Outcome is related to infarct size, but data on predictors of infarct growth is limited. We analyzed our cohort of EVT treated patients primarily selected by magnetic resonance imaging (MRI) to examine predictors of infarct growth and the association between infarct size and outcome. Methods: We identified 342 patients with anterior circulation stroke from 2004 to 2014 in our prospectively collected EVT database...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29163033/phosphorylation-at-s153-as-a-functional-switch-of-phosphatidylethanolamine-binding-protein-1-in-cerebral-ischemia-reperfusion-injury-in-rats
#7
Zhong Wang, Jiyuan Bu, Xiyang Yao, Chenglin Liu, Haitao Shen, Xiang Li, Haiying Li, Gang Chen
This study aimed to estimate the role of phosphatidylethanolamine binding protein 1 (PEBP1) in cerebral ischemia-reperfusion (I/R) injury and the underlying mechanisms. Middle cerebral artery occlusion/reperfusion (MCAO/R) model in adult male Sprague Dawley rats (250-280 g) were established and cultured neurons were exposed to oxygen-glucose deprivation/reoxygenation (OGD/R) to mimic I/R injury in vitro. Expression vectors encoding wild-type PEBP1 and PEBP1 with Ser153Ala mutation (S153A), PEBP1 specific siRNAs, and human recombinant PEBP1 (rhPEBP1) were administered intracerebroventricularly...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/29162747/therapeutic-effect-of-a-novel-wnt-pathway-inhibitor-on-cardiac-regeneration-after-myocardial-infarction
#8
Chunyu Zeng, Dezhong Yang, Wenbin Fu, Liangpeng Li, Xuewei Xia, Qiao Liao, Rongchuan Yue, Hongmei Chen, Xiongwen Chen, Songzhu An, Wei Eric Wang
After myocardial infarction (MI), the heart is difficult to repair because of great loss of cardiomyoctyes and lack of cardiac regeneration. Novel drug candidates that aim at reducing pathological remodeling and stimulating cardiac regeneration are highly desirable. In this study, we identified if and how a novel porcupine inhibitor CGX1321 influenced MI and cardiac regeneration. Permanent ligation of left anterior descending (LAD) coronary artery was performed in mice to induce MI injury. Cardiac function was measured by echocardiography, infarct size was examined by TTC staining...
November 21, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/29160120/oral-administration-of-a-novel-lipophilic-ppar%C3%AE-agonist-is-not-neuroprotective-after-rodent-cerebral-ischemia
#9
Samuel Knauss, Matthias Endres, Florian Blaschke, Claudia Hindinger, Alexander Kunz
Peroxisome proliferator-activated receptors are regulators of inflammatory signaling. This has fostered hope that PPAR agonists might have neuroprotective potential. We hypothesized that PPARδ activation by the novel orally administered lipophilic PPARδ agonist SAR145 may improve short- and long-term outcome after focal brain ischemia. We induced ischemia by transient filamentous middle cerebral artery occlusion (MCAo) in 227 C57BL/6 mice and administered SAR145 in varying doses and time windows post-injury...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29159980/role-of-pi3k-in-myocardial-ischaemic-preconditioning-mapping-pro-survival-cascades-at-the-trigger-phase-and-at-reperfusion
#10
Xavier Rossello, Jaime A Riquelme, Sean M Davidson, Derek M Yellon
The Reperfusion Injury Salvage Kinase (RISK) pathway is considered the main pro-survival kinase cascade mediating the ischaemic preconditioning (IPC) cardioprotective effect. To assess the role of PI3K-Akt, its negative regulator PTEN and other pro-survival proteins such as ERK and STAT3 in the context of IPC, C57BL/6 mouse hearts were retrogradely perfused in a Langendorff system and subjected to 4 cycles of 5 min. ischaemia and 5 min. reperfusion prior to 35 min. of global ischaemia and 120 min. of reperfusion...
November 20, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29159507/stat3-as-a-common-signal-of-ischemic-conditioning-a-lesson-on-rigor-and-reproducibility-in-preclinical-studies-on-cardioprotection
#11
Petra Kleinbongard, Andreas Skyschally, Sabine Gent, Marion Pesch, Gerd Heusch
Ischemic conditioning before (ischemic preconditioning, IPC) or after (ischemic postconditioning, POCO) sustained myocardial ischemia/reperfusion (I/R), induced locally or remotely from the heart (remote IPC, RIPC), reduces infarct size. However, none of the identified signaling steps of ischemic conditioning was robust across models and species to be successfully translated to humans. In prior separate studies in pigs, activation of signal transducer and activator of transcription 3 (STAT3) was causal for infarct size reduction by IPC, POCO, and RIPC but it remains unclear whether or not STAT3 is truly a common denominator of cardioprotective signaling...
November 20, 2017: Basic Research in Cardiology
https://www.readbyqxmd.com/read/29158839/characterization-of-cardiac-dynamics-in-an-acute-myocardial-infarction-model-by-four-dimensional-optoacoustic-and-magnetic-resonance-imaging
#12
Hsiao-Chun Amy Lin, Xosé Luís Déan-Ben, Ivana Ivankovic, Melanie A Kimm, Katja Kosanke, Helena Haas, Reinhard Meier, Fabian Lohöfer, Moritz Wildgruber, Daniel Razansky
Extraction of murine cardiac functional parameters on a beat-by-beat basis is limited with the existing imaging modalities due to insufficient three-dimensional temporal resolution. Faster volumetric imaging methods enabling in vivo characterization of functional parameters are poised to advance cardiovascular research and provide a better understanding of the mechanisms underlying cardiac diseases. We present a new approach based on analyzing contrast-enhanced optoacoustic (OA) images acquired at high volumetric frame rate without using cardiac gating or other approaches for motion correction...
2017: Theranostics
https://www.readbyqxmd.com/read/29153575/persistent-iron-within-the-infarct-core%C3%A2-after-st-segment-elevation-myocardial-infarction-implications-for-left-ventricular-remodeling-and-health%C3%A2-outcomes
#13
Jaclyn Carberry, David Carrick, Caroline Haig, Nadeem Ahmed, Ify Mordi, Margaret McEntegart, Mark C Petrie, Hany Eteiba, Stuart Hood, Stuart Watkins, Mitchell Lindsay, Andrew Davie, Ahmed Mahrous, Ian Ford, Naveed Sattar, Paul Welsh, Aleksandra Radjenovic, Keith G Oldroyd, Colin Berry
OBJECTIVES: This study sought to determine the incidence and prognostic significance of persistent iron in patients post-ST-segment elevation myocardial infarction (STEMI). BACKGROUND: The clinical significance of persistent iron within the infarct core after STEMI complicated by acute myocardial hemorrhage is poorly understood. METHODS: Patients who sustained an acute STEMI were enrolled in a cohort study (BHF MR-MI [Detection and Significance of Heart Injury in ST Elevation Myocardial Infarction])...
November 10, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29153151/what-is-the-best-st-segment-recovery-parameter-to-predict-clinical-outcome-and-myocardial-infarct-size-amplitude-speed-and-completeness-of-st-segment-recovery-after-primary-percutaneous-coronary-intervention-for-st-segment-elevation-myocardial-infarction
#14
Wichert J Kuijt, Cindy L Green, Niels J W Verouden, Joost D E Haeck, Dan Tzivoni, Karel T Koch, Gregg W Stone, Alexandra J Lansky, Samuel Broderick, Jan G P Tijssen, Robbert J de Winter, Matthew T Roe, Mitchell W Krucoff
AIMS: ST-segment recovery (STR) is a strong mechanistic correlate of infarct size (IS) and outcome in ST-segment elevation myocardial infarction (STEMI). Characterizing measures of speed, amplitude, and completeness of STR may extend the use of this noninvasive biomarker. METHODS AND RESULTS: Core laboratory continuous 24-h 12-lead Holter ECG monitoring, IS by single-photon emission computed tomography (SPECT), and 30-day mortality of 2 clinical trials of primary percutaneous coronary intervention in STEMI were combined...
November 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29151151/long-term-treatment-of-diabetic-rats-with-vanadyl-sulfate-or-insulin-attenuate-acute-focal-cerebral-ischemia-reperfusion-injury-via-their-antiglycemic-effect
#15
Hossein Ahmadi-Eslamloo, Gholam Abbas Dehghani, Seyed Mostafa Shid Moosavi
It is well-known that patients with diabetes mellitus have worse clinical outcomes following acute ischemic stroke. The intensifying effects of diabetes on ischemic brain injury have been shown to be mostly due to hyperglycemia, rather than the lack of insulin direct effects on brain. It is also well-approved that vanadium compounds have insulin-like and anti-diabetic effects, and the present study was designed to compare the protective effects of diabetes treatment with vanadium or insulin on ischemic/reperfused brain injury...
November 19, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/29147910/therapeutic-activities-of-dj-1-and-its-binding-compounds-against-neurodegenerative-diseases
#16
Masatoshi Inden, Daijiro Yanagisawa, Masanori Hijioka, Hiroyoshi Ariga, Yoshihisa Kitamura
Parkinson's disease (PD) is a progressive neurodegenerative disorder that is primarily characterized by the degeneration of dopaminergic neurons in the nigrostriatal pathway. Loss-of-function mutations in the gene encoding PARK7/DJ-1 were identified in familial PD. Wild-type DJ-1 acts as an oxidative stress sensor in neural cells. Previously, we identified binding compounds of DJ-1, including UCP0045037/compound A, UCP0054278/compound B, and compound-23 (comp-23), by in silico virtual screening. These compounds prevented oxidative stress-induced dopaminergic neuronal death and restored locomotion defects in animal models of PD...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29142492/early-changes-in-platelet-size-and-number-in-patients-with-acute-coronary-syndrome
#17
Zora Sušilović Grabovac, Darija Baković, Mislav Lozo, Irena Pintarić, Željko Dujić
A strong relationship exists between acute coronary syndrome (ACS) and platelets (PLTs) volume. Mean platelet volume (MPV) is a parameter of PLT functions and a marker for increased PLT activation. The aim of this study was to determine early changes in number of total PLT and MPV in different manifestation of ACS and to find out predictive value of MPV in the spectrum of ACS. This was a prospective study. One hundred thirty-four ACS patients were enrolled, 76 of them finished the study. PLT and MPV in patients with unstable angina, non-ST elevation, and ST elevation myocardial infarctions were determined on arrival and 1, 3, 72 hours, and 7 days after the admission to hospital...
December 2017: International Journal of Angiology: Official Publication of the International College of Angiology, Inc
https://www.readbyqxmd.com/read/29142491/impact-of-remote-ischemic-postconditioning-during-primary-percutaneous-coronary-intervention-on-left-ventricular-remodeling-after-anterior-wall-st-segment-elevation-myocardial-infarction-a-single-center-experience
#18
Ayman Elbadawi, Omar Awad, Ramy Raymond, Haytham Badran, Ahmad E Mostafa, Marwan Saad
The role of remote ischemic postconditioning (RIPostC) in improving left ventricular (LV) remodeling after primary percutaneous coronary intervention (PCI) is not well established. To determine the efficacy and safety of RIPostC in improving LV remodeling and cardiovascular outcomes after primary PCI for anterior ST-elevation myocardial infarction (STEMI). Seventy-one patients with anterior STEMI were randomized to primary PCI with RIPostC protocol ( n  = 36) versus conventional primary PCI ( n  = 35)...
December 2017: International Journal of Angiology: Official Publication of the International College of Angiology, Inc
https://www.readbyqxmd.com/read/29142025/cardioprotection-of-dapagliflozin-and-vildagliptin-in-cardiac-reperfusion-injury-rats
#19
Pongpan Tanajak, Piangkwan Sa-Nguanmoo, Sivaporn Sivasinprasan, Savitree Thummasorn, Natthaphat Siri-Angkul, Siriporn Chattipakorn, Nipon Chattipakorn
Sodium-glucose cotransporter 2 inhibitor (SGLT2-i) effects on cardiac ischemia/reperfusion (I/R) injury are unclear. Unlike SGLT2-i, dipeptidyl peptidase 4 inhibitors (DPP4-i) have shown effective cardioprotection in cardiac I/R injury. We aimed to investigate whether SGLT2-i reduces myocardial dysfunction and myocardial injury to a greater extent than DPP4-i in obese-insulin resistant rats with/without cardiac I/R injury. The high fat (HF) diet induced obese-insulin resistant rats were divided into 4 groups and received the following treatments for 28 days: vehicle (HFV); vildagliptin at a dosage of 3 mg/kg/day (HFVil); dapagliflozin at a dosage of 1 mg/kg/day (HFDa); and combination drugs (HFDaVil)...
November 15, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/29141547/cardioprotective-effects-of-serca2a-overexpression-against-ischemia-reperfusion-induced-injuries-in-rats
#20
Yan Jian, Li-Li Tian, Lin-Hui Wang, Xiao-Dong Zhao, Jing-Wei Chen, Koji Murao, Wei Zhu, Liang Dong, Guo-Qing Wang, Wan-Ping Sun, Guo-Xing Zhang
AIMS: The aim of the present study is to assess how genetically increased Sarcoplasmic reticulum Ca2+-ATPase (Serca2a) expression affects cardiac injury after ischemia/reperfusion (I/R) exposure and the related mechanisms involved. METHODS AND RESULTS: Rats were subjected to left anterior descending coronary artery (LAD) occlusion for 30 min followed by a 24-hour reperfusion. Cardiac function analysis revealed that cardiac function dramatically improved in Serca2a transgenic rats (Serca2aTG) rats compared to wild type (WT) rats...
November 10, 2017: Current Gene Therapy
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