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https://www.readbyqxmd.com/read/28822963/%C3%AE-1a-subtype-adrenergic-agonist-therapy-for-failing-right-ventricle
#1
Patrick M Cowley, Guan-Ying Wang, Sunil K Joshi, Philip M Swigart, David H Lovett, Paul C Simpson, Anthony J Baker
Failure of the right ventricle (RV) is a serious disease with a poor prognosis and limited treatment options. Signaling by α1-adrenergic receptors (α1-ARs), in particular the α1A-subtype, mediate cardioprotective effects in multiple heart failure models. Recent studies show that chronic treatment with the α1A-subtype agonist A61603 improves function and survival in a model of LV failure. The goal of this study was to determine if chronic A61603 treatment is beneficial in a RV failure model. We used tracheal instillation of the fibrogenic antibiotic bleomycin in mice to induce pulmonary fibrosis, pulmonary hypertension, and RV failure within 2 wk...
August 19, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28822701/clinical-applications-of-biomarkers-in-atrial-fibrillation
#2
REVIEW
Kay-Won Chang, Jonathan C Hsu, Avinash Toomu, Sutton Fox, Alan S Maisel
While biomarkers have greatly impacted the diagnosis and management of myocardial infarction and heart failure, the use of biomarkers has been slow to permeate management of atrial fibrillation. Guideline recommendations on the use of biomarkers in atrial fibrillation were virtually non-existent until the 2016 European Society of Cardiology guidelines on atrial fibrillation offered a class IIb recommendation to consider using biomarkers such as high sensitivity troponin and natriuretic peptide to further refine stroke and bleeding risk in atrial fibrillation patients...
August 16, 2017: American Journal of Medicine
https://www.readbyqxmd.com/read/28822614/heterogeneity-in-a-large-pedigree-with-danon-disease-implications-for-pathogenesis-and-management
#3
Jonathan C P Roos, Matthew J Daniels, Elizabeth Morris, Hanna I Hyry, Timothy M Cox
BACKGROUND: Danon disease is an X-linked disturbance of autophagy manifesting with cognitive impairment and disordered heart and skeletal muscle. After a period of relative stability, patients deteriorate rapidly and may quickly become ineligible for elective heart transplantation - the only life-saving therapy. METHODS: We report a large pedigree with diverse manifestations of Danon disease in hemizygotes and female heterozygotes. RESULTS: Malignant cardiac arrhythmias requiring amiodarone treatment induced thyroid disease in two patients; intractable thyrotoxicosis, which enhances autophagy, caused the death of a 21year-old man...
June 21, 2017: Molecular Genetics and Metabolism
https://www.readbyqxmd.com/read/28820802/antioxidation-role-of-different-lateral-stellate-ganglion-block-in-isoproterenol-induced-acute-myocardial-ischemia-in-rats
#4
Na Wei, Meng Chi, Lin Deng, Guonian Wang
BACKGROUND AND OBJECTIVES: To determine whether stellate ganglion block (SGB) treatment exerts protective effects against isoproterenol (ISO)-induced acute myocardial ischemia (AMI) due to its antioxidant effects, we aimed to evaluate the protective effects of different lateral SGB agents on the tissue antioxidant status in ISO-induced AMI in male Sprague-Dawley rats. METHODS: The AMI model received an acute ISO overdose to make cardiac ischemia damage at a single dose of 110 mg/kg injected subcutaneously into the rats...
September 2017: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/28818210/clinical-use-of-high-sensitivity-cardiac-troponin-in-patients-with-suspected-myocardial-infarction
#5
REVIEW
Raphael Twerenbold, Jasper Boeddinghaus, Thomas Nestelberger, Karin Wildi, Maria Rubini Gimenez, Patrick Badertscher, Christian Mueller
High-sensitivity cardiac troponin (hs-cTn) assays have been used clinically by thousands of physicians in many countries throughout the world since their clinical introduction 7 years ago. In the early diagnosis of myocardial infarction (MI), beyond doubt, the most important indication of hs-cTn assays, these simple, inexpensive, and highly reproducible tools complement detailed clinical assessment including chest pain characteristics and the electrocardiogram. Hs-cTn assays for the first time allowed the precise quantification of cardiomyocyte injury around the 99th percentile and thereby substantially increased the accuracy of MI detection from blood obtained at presentation to the emergency department (ED)...
August 22, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28817660/cited4-is-related-to-cardiogenic-induction-and-maintenance-of-proliferation-capacity-of-embryonic-stem-cell-derived-cardiomyocytes-during-in-vitro-cardiogenesis
#6
Junichiro Miake, Tomomi Notsu, Katsumi Higaki, Kyoko Hidaka, Takayuki Morisaki, Kazuhiro Yamamoto, Ichiro Hisatome
Cardiac progenitor cells have a limited proliferative capacity. The CREB-binding protein/p300-interacting transactivator, with the Glu/Asp-rich carboxy-terminal domain (Cited) gene family, regulates gene transcription. Increased expression of the Cited4 gene in an adult mouse is associated with exercise-induced cardiomyocyte hypertrophy and proliferation. However, the expression patterns and functional roles of the Cited4 gene during cardiogenesis are largely unknown. Therefore, in the present study, we investigated the expression patterns and functional roles of the Cited4 gene during in vitro cardiogenesis...
2017: PloS One
https://www.readbyqxmd.com/read/28815273/micro-versus-nano-sized-molecularly-imprinted-polymers-in-maldi-tof-mass-spectrometry-analysis-of-peptides
#7
Lucia Cenci, Maddalena Bertolla, Andrea Anesi, Emmanuele Ambrosi, Graziano Guella, Alessandra Maria Bossi
The integration of molecularly imprinted polymers (MIPs) with MALDI-TOF mass spectrometry (MS) combines MIP selectivity with MS sensitivity. Whether the size of the MIP material-micro versus nano-has an effect on the MS analysis was the object of the study. MIPs, targeting respectively the epitope peptide NR11 of cardiac troponin I and the peptide CK13 of human serum transferrin, were synthesized and characterized. The size-related performance of the MIP materials hyphenated with MALDI-TOF-MS analysis was studied by the incubation of the target peptide with the respective micro- or nano-MIP, followed by rinsing to remove non-specific deposition of the MIP to the MALDI target plate, co-crystallization with the organic matrix, and mass analysis...
August 16, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28814347/early-troponin-i-in-critical-illness-and-its-association-with-hospital-mortality-a-cohort-study
#8
Annemarie B Docherty, Malcolm Sim, Joao Oliveira, Michael Adlam, Marlies Ostermann, Timothy S Walsh, John Kinsella, Nazir I Lone
BACKGROUND: Troponin I (TnI) is frequently elevated in critical illness, but its interpretation is unclear. Our primary objectives in this study were to evaluate whether TnI is associated with hospital mortality and if this association persists after adjusting for potential confounders. We also aimed to ascertain whether addition of TnI to the Acute Physiological and Chronic Health Evaluation II (APACHE II) risk prediction model improves its performance in general intensive care unit (ICU) populations...
August 16, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28814234/biomarkers-of-cardiovascular-risk-in-haemodialysis-patients
#9
Beata Franczyk, Anna Gluba-Brzózka, Jacek Rysz
BACKGROUND: All stages of chronic kidney disease (CKD) are associated with increased risks of atherosclerosis and cardiovascular morbidity and mortality. According to studies, levels of copeptin, growth differentiation factor-15 (GDF-15) and heart fatty-acid binding protein (h-FABP) are increased in dialysis patients. MATERIALS: This study included 50 patients (19 women, 31 men) chronically undergoing haemodialysis. The concentration of markers: copeptin, GDF-15, h-FABP, troponin and serum creatine kinase MB (CKMB) were measured with the use of ELISA tests...
August 15, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28812383/evaluation-of-relationship-between-coronary-artery-status-evaluated-by-coronary-computed-tomography-angiography-and-development-of-cardiomyopathy-in-carbon-monoxide-poisoned-patients-with-myocardial-injury-a-prospective-observational-study
#10
Yong Sung Cha, Hyun Kim, Yoonsuk Lee, Woocheol Kwon, Jung-Woo Son, Hyun Youk, Hyung Il Kim, Oh Hyun Kim, Kyung Hye Park, Kyoung-Chul Cha, Kang Hyun Lee, Sung Oh Hwang
OBJECTIVES: Whether coronary artery changes are a main mechanism in the development of carbon monoxide (CO)-induced cardiomyopathy remains unknown. We investigated the effects of coronary artery stenosis on the presence or patterns of cardiomyopathy in CO-poisoned patients with myocardial injury defined as elevation of troponin I. MATERIALS AND METHODS: This prospective observational study collected data from consecutive patients who were diagnosed with CO poisoning and myocardial injury during the 24-month study period...
August 16, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28812367/the-usefulness-of-diffusion-weighted-magnetic-resonance-imaging-performed-in-the-acute-phase-as-an-early-predictor-of-delayed-neuropsychiatric-sequelae-in-acute-carbon-monoxide-poisoning
#11
Y S Kim, Y S Cha, M S Kim, H J Kim, Y S Lee, H Youk, H I Kim, O H Kim, K-C Cha, H Kim, K H Lee, S O Hwang
Delayed onset of neuropsychiatric symptoms after apparent recovery from acute carbon monoxide (CO) poisoning has been described as delayed neuropsychiatric sequelae (DNS). No previous study has determined whether early use of diffusion-weighted magnetic resonance imaging (DWI) can predict which patients will develop DNS in the acute CO poisoning. This retrospective observational study was performed on adult patients with acute CO poisoning consecutively treated over a 17-month period. All included patients with acute CO poisoning underwent DWI to evaluate brain injury within 72 h after CO exposure...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28811954/is-neutrophil-to-lymphocyte-ratio-a-predictor-of-coronary-artery-disease-in-western-indians
#12
Kamal Sharma, Alap K Patel, Komal H Shah, Ashwati Konat
INTRODUCTION: The current study was designed to evaluate the association of neutrophil-to-lymphocyte ratio (NLR) with coronary artery disease (CAD) presence. We also aimed to propose a suitable cut-off of NLR for diagnosis of CAD in Western Indians. METHODS: Total 324 patients undergoing coronary angiography were enrolled and were subdivided into two groups: group 1 (n = 99; population without CAD) and group 2 (n = 225; population with CAD). RESULTS: The results indicated significant (p < 0...
2017: International Journal of Inflammation
https://www.readbyqxmd.com/read/28811951/granulomatosis-with-polyangiitis-presenting-as-pyrexia-of-unknown-origin-leukocytosis-and-microangiopathic-haemolytic-anemia
#13
Sima Terebelo, Iona Chen
A 66-year-old woman presented to the Emergency Department with a florid sepsis-like picture, a two-week history of fever, relative hypotension with end organ ischemia (unexplained liver enzyme and troponin elevations), and nonspecific constitutional symptoms. She was initially found to have a urinary tract infection but, despite appropriate treatment, her fever persisted and her white blood cell count continued to rise. During her hospitalization the patient manifested leukocytosis to 47,000 WBC/μL, ESR 67 mm/hr (normal range 0-42 mm/hr), CRP 17...
2017: Case Reports in Rheumatology
https://www.readbyqxmd.com/read/28811941/seizure-associated-takotsubo-syndrome-a-rare-combination
#14
Htay Htay Kyi, Nour Aljariri Alhesan, Sunil Upadhaya, Samer Al Hadidi
Takotsubo cardiomyopathy (TC) is increasingly recognized in neurocritical care population especially in postmenopausal females. We are presenting a 61-year-old African American female with past medical history of epilepsy, bipolar disorder, and hypertension who presented with multiple episodes of seizures due to noncompliance with antiepileptic medications. She was on telemetry which showed ST alarm. Electrocardiogram (ECG) was ordered and showed ST elevation in anterolateral leads and troponins were positive...
2017: Case Reports in Cardiology
https://www.readbyqxmd.com/read/28811571/identification-of-a-gene-encoding-slow-skeletal-muscle-troponin-t-as-a-novel-marker-for-immortalization-of-retinal-pigment-epithelial-cells
#15
Takuya Kuroda, Satoshi Yasuda, Hiroyuki Nakashima, Nozomi Takada, Satoko Matsuyama, Shinji Kusakawa, Akihiro Umezawa, Akifumi Matsuyama, Shin Kawamata, Yoji Sato
Human pluripotent stem cells (hPSCs) are leading candidate raw materials for cell-based therapeutic products (CTPs). In the development of hPSC-derived CTPs, it is imperative to ensure that they do not form tumors after transplantation for safety reasons. Because cellular immortalization is a landmark of malignant transformation and a common feature of cancer cells, we aimed to develop an in vitro assay for detecting immortalized cells in CTPs. We employed retinal pigment epithelial (RPE) cells as a model of hPSC-derived products and identified a gene encoding slow skeletal muscle troponin T (TNNT1) as a novel marker of immortalized RPE cells by comprehensive microarray analysis...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28810994/comparison-of-point-of-care-versus-laboratory-troponin-testing-in-an-emergency-department-setting
#16
Michael Juliano, Courtney Wason
BACKGROUND: There have been concerns regarding troponin results accuracy between point-of-care (POC) testing preformed in an emergency department (ED) setting and laboratory testing. The purpose of this study was to compare the results of cardiac troponin I testing as concerns POC testing and laboratory analysis as a way to show that these results are interchangeable. METHODS: A retrospective chart review was performed from October 2012 through September 2013 to identify all patients who presented to the ED that received both a POC and laboratory troponin associated with the same blood draw...
July 2017: Military Medicine
https://www.readbyqxmd.com/read/28810624/high-mobility-group-box-1-protein-attenuates-myocardial-ischemia-reperfusion-injury-via-inhibition-of-the-p38-mitogen-activated-protein-kinase-signaling-pathway
#17
Yan-Hong Zhou, Qian-Feng Han, Lan-Hua Wang, Tao Liu, Xiao-Yan Meng, Lei Wu, Tai Li, Yue-Ru Jiao, Heng-Chen Yao, De-Yong Zhang
The present study aimed to determine the effects of high mobility group box 1 protein (HMGB1) on myocardial ischemia reperfusion (I/R) injury in rats following acute myocardial ischemia and investigate the underlying molecular mechanisms of these effects. Male Wistar rats were randomly divided into the following groups (n=10/group): Sham operation; I/R; HMGB50 (50 ng/kg HMGB1 before I/R); HMGB100 (100 ng/kg HMGB1 before I/R); and HMGB200 (200 ng/kg HMGB1 before I/R). Serum cardiac troponin I (cTnI), interleukin (IL)-6 and tumor necrosis factor (TNF)-α levels were subsequently measured...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28810581/protective-effect-of-glycyrrhizin-on-myocardial-ischemia-reperfusion-injury-induced-oxidative-stress-inducible-nitric-oxide-synthase-and-inflammatory-reactions-through-high-mobility-group-box-1-and-mitogen-activated-protein-kinase-expression
#18
Xiangna Cai, Xin Wang, Jilin Li, Shuying Chen
Glycyrrhizin, which is a type of perennial leguminous caudex, has been used in various Asian countries, including P.R. China, India and Japan, for thousands of years. The present study was designed to investigate the protective effect of glycyrrhizin on myocardial ischemia/reperfusion (I/R) injury through oxidative stress, inducible nitric oxide synthase (iNOS), and inflammatory reactions via high-mobility group box 1 (HMGB1) and mitogen-activated protein kinase (MAPK) expression. Sprague-Dawley rats were divided into five groups: Sham; myocardial I/R injury + non-treated; myocardial I/R injury + 2 mg/kg glycyrrhizin; myocardial I/R injury + 4 mg/kg glycyrrhizin; and myocardial I/R injury + 10 mg/kg glycyrrhizin...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28810547/salvianolic-acid-a-protects-against-myocardial-ischemia-reperfusion-injury-by-reducing-platelet-activation-and-inflammation
#19
Xiaoling Yuan, Yijia Xiang, Ning Zhu, Xuyong Zhao, Shiyong Ye, Peng Zhong, Chunlai Zeng
The aim of the present study was to investigate the protective effect of salvianolic acid A (SAA) on myocardial ischemia/reperfusion injury in rats. SAA (10 mg/kg) or Tirofiban (60 µg/kg) was administered to rats by jugular vein injection 10 min before the initiation of reperfusion. After 3 h of reperfusion, platelet aggregation was measured using an aggregometer and levels of nitric oxide (NO) were detected using an ultraviolet spectrophotometer. Serum levels of cardiac troponin T (cTnT), creatine kinase isoenzyme MB (CK-MB), p-selectin, interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α) were also measured 3 and 24 h after reperfusion...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28808841/prognostic-significance-of-myocardial-energy-expenditure-and-myocardial-efficiency-in-patients-with-heart-failure-with-reduced-ejection-fraction
#20
Mehmet S Cetin, Elif H Ozcan Cetin, Ugur Canpolat, Hatice Sasmaz, Ahmet Temizhan, Sinan Aydogdu
In heart failure with reduced ejection fraction (HFrEF) patients, myocardial blood flow (MBF), myocardial energy expenditure (MEE), myocardial efficiency has been poorly evaluated because of the necessity of invasive procedures in the determination of these parameters. Transthoracic echocardiography (TTE) can provide reliable data for MEE, MBF (via coronary sinus (CS) flows). Also, myocardial efficiency can be evaluated by the MEE to MBF ratio. We aim to assess MBF, MEE and energy efficiency and the prognostic value of these parameters in HFrEF...
August 14, 2017: International Journal of Cardiovascular Imaging
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