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cardiac troponin T

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https://www.readbyqxmd.com/read/29227899/cardiac-troponins-and-nt-probnp-in-the-forensic-setting-overview-of-sampling-site-postmortem-interval-cardiopulmonary-resuscitation-and-review-of-the-literature
#1
Cristian Palmiere, Camilla Tettamanti, Alessandro Bonsignore, Francesco De Stefano, Jessica Vanhaebost, Guillaume Rousseau, Maria Pia Scarpelli, Daniel Bardy
The possible use of biochemical markers in the postmortem diagnosis of myocardial ischemia is well known in the forensic setting, though several issues have limited its widespread adoption. The study presented herein focuses of N-terminal pro-B-type natriuretic peptide, troponin T, and troponin I, and the possible influence due to sampling site chosen, postmortem interval elapsed, and cardiopulmonary resuscitation attempts. Comparisons were performed between antemortem serum levels of these markers and postmortem levels measured in pericardial fluid and postmortem serum samples obtained from different sampling sites (n=16)...
November 27, 2017: Forensic Science International
https://www.readbyqxmd.com/read/29226754/cardiac-troponins-25-years-on-the-stage-and-still-improving-their-clinical-value
#2
Aitor Alquézar-Arbé, Alessandro Sionis, Jorge Ordoñez-Llanos
Twenty-five years ago, non-isotopic immunoassays for measuring the cardiac specific isoforms of troponin I (cTnI) and T (cTnT) were developed. Both biomarkers radically changed the diagnosis, prognosis, and therapy indication of acute coronary syndromes (ACS) and, particularly, of myocardial infarction (MI). However, cardiac troponins (cTn) rapidly demonstrated their usefulness in other cardiac and non-cardiac conditions, a part of the ischemic coronary diseases. Consequently, the number of patients to be tested for cTn and the number of tests requested to clinical laboratories sharply increased...
December 11, 2017: Critical Reviews in Clinical Laboratory Sciences
https://www.readbyqxmd.com/read/29224368/immune-response-proteins-as-predictive-biomarkers-of-doxorubicin-induced-cardiotoxicity-in-breast-cancer-patients
#3
Li-Rong Yu, Zhijun Cao, Issam Makhoul, Jaclyn R Daniels, Suzanne Klimberg, Jeanne Y Wei, Jane Pf Bai, Jinong Li, Julia T Lathrop, Richard D Beger, Valentina K Todorova
Cancer treatment with doxorubicin (DOX) can induce cumulative dose-dependent cardiotoxicity. Currently, there are no specific biomarkers that can identify patients at risk during the initial doses of chemotherapy. The aim of this study was to examine plasma cytokines/chemokines and potential cardiovascular biomarkers for the prediction of DOX-induced cardiotoxicity. Plasma samples were collected before (T0), and after the first (T1) and the second (T2) cycles of DOX-based chemotherapy of 27 breast cancer patients, including five patients who presented with >10% decline of left ventricular ejection fraction (LVEF), five patients with LVEF decline of 5-10%, and 17 patients who maintained normal LVEF at the end of chemotherapy (240 mg/m2 cumulative dose of DOX from four cycles of treatment)...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/29221605/significance-of-high-sensitivity-troponin-t-after-elective-external-direct-current-cardioversion-for-atrial-fibrillation-or-atrial-flutter
#4
Ronstan Lobo, Allan S Jaffe, Ciara Cahill, Ophelia Blake, Syed Abbas, Thomas B Meany, Terrence Hennessy, Thomas J Kiernan
External transthoracic direct current (DC) cardioversion is a commonly used method of terminating cardiac arrhythmias. Previous research has shown that DC cardioversion resulted in myocardial injury as evidenced by increased levels of cardiac troponin, even though only minimally. Many of these studies were based on the outdated monophasic defibrillators and older, less sensitive troponin assays. This study aimed to assess the effect of external transthoracic DC cardioversion on myocardial injury as measured by the change in the new high-sensitivity cardiac troponin T (hs-cTnT) using the more modern biphasic defibrillators...
October 19, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/29218986/collection-method-of-sers-active-nanoparticles-for-sensitive-and-precise-measurements
#5
Javier T Garza, Gerard L Cote
Developing surface-enhanced Raman spectroscopy (SERS) based biosensors requires not only synthesizing SERS active nanoparticles or nanoprobes that produce intense signal but also collecting them in a consistent manner to obtain sensitive and precise measurements. Nanoprobes are commonly measured in solution; however, this approach has several disadvantages that can reduce sensitivity, such as probing only a small percentage of the nanoprobes present in the sample. In this work, a novel collection device was designed, built, and tested which consistently concentrates nanoprobes in a specific area to yield highly sensitive (femtomolar) and repeatable measurements...
December 8, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29217433/hypertrophic-cardiomyopathy-linked-mutation-in-troponin-t-causes-myofibrillar-disarray-and-pro-arrhythmic-action-potential-changes-in-human-ipsc-cardiomyocytes
#6
Lili Wang, Kyungsoo Kim, Shan Parikh, Adrian Gabriel Cadar, Kevin R Bersell, Huan He, Jose R Pinto, Dmytro O Kryshtal, Bjorn C Knollmann
BACKGROUND: Mutations in cardiac troponin T (TnT) are linked to increased risk of ventricular arrhythmia and sudden death despite causing little to no cardiac hypertrophy. Studies in mice suggest that the hypertrophic cardiomyopathy (HCM)-associated TnT-I79N mutation increases myofilament Ca sensitivity and is arrhythmogenic, but whether findings from mice translate to human cardiomyocyte electrophysiology is not known. OBJECTIVES: To study the effects of the TnT-I79N mutation in human cardiomyocytes...
December 4, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29216729/periostin-normalizes-levels-of-cardiac-markers-in-rats-with-experimental-isoproterenol-cardiotoxicity
#7
A K Devrim, M Sozmen, T Devrim, M Sudagidan, M Cinar, Y B Kabak
BACKGROUND: Although the molecular mechanism of cardiac healing is not fully understood, myocardial infarction is one of the most usual diagnoses in hospitalized patients in industrialized nations while periostin has been recently suggested to have a potential in tissue repairing following myocardial ischemia. OBJECTIVES: To investigate the effects of periostin on the levels of selected cardiac parameters (cardiac troponin I and T, creatine kinase and creatine kinase isoenzyme-MB), antioxidant/lipid peroxidation parameters (superoxide dismutase, catalase, and malondialdehyde), hepatic parameters (alkaline phosphatase, lactate dehydrogenase, aspartate and alanine transaminases) as well as lipids (total cholesterol, triglyceride, high, low and very‑low‑density lipoproteins) in a rat model of isoproterenol---induced myocardial injury...
2017: Bratislavské Lekárske Listy
https://www.readbyqxmd.com/read/29215470/invasive-assessment-of-microvascular-function-in-patients-with-valvular-heart-disease
#8
Takeshi Nishi, Hideki Kitahara, Saito Yuichi, Tomoko Nishi, Takashi Nakayama, Yoshihide Fujimoto, Goro Matsumiya, Yoshio Kobayashi
BACKGROUND: The aim of this study was to investigate microvascular function in patients with valvular heart disease (VHD), which causes chronic left ventricular volume and/or pressure overload, therefore change in coronary microvascular hemodynamics. PATIENTS AND METHODS: We prospectively enrolled 30 patients with VHD considered for surgery (10 aortic stenosis, 12 aortic regurgitation, and eight mitral regurgitation) and 30 controls. Intracoronary physiological assessments were performed in the unobstructed left anterior descending artery using a pressure-temperature sensor guidewire at rest and hyperemia...
December 5, 2017: Coronary Artery Disease
https://www.readbyqxmd.com/read/29210794/effect-of-remote-ischemic-preconditioning-on-outcomes-in-adult-cardiac-surgery-a-systematic-review-and-meta-analysis-of-randomized-controlled-studies
#9
Jianfeng Xie, Xiwen Zhang, Jingyuan Xu, Zhongheng Zhang, Nathan J Klingensmith, Songqiao Liu, Chun Pan, Yi Yang, Haibo Qiu
BACKGROUND: Remote ischemic preconditioning (RIPC) has been demonstrated to prevent organ dysfunction in cardiac surgery patients. However, recent large, prospective, multicenter, randomized controlled trials (RCTs) had controversial results. Thus, a meta-analysis of RCTs was performed to investigate whether RIPC can reduce the incidence of acute myocardial infarction (AMI), acute kidney injury (AKI), and mortality in adult cardiac surgery patients. METHODS: Study data were collected from Medline, Elsevier, Cochrane Central Register of Controlled Trials and Web of Science databases...
November 22, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29208425/serum-uric-acid-as-a-potential-marker-for-heart-failure-risk-in-men-on-antihypertensive-treatment-the-british-regional-heart-study
#10
S Goya Wannamethee, Olia Papacosta, Lucy Lennon, Peter H Whincup
The role of serum uric acid (SUA) as a prognostic marker for incident heart failure (HF) in hypertensive subjects is uncertain. We have prospectively examined the relationship between SUA and incident HF in 3440 men aged 60-79years separately in those on and not on antihypertensive treatment who were followed up for a mean period of 15years. Men on SUA lowering drugs and those with history of HF or myocardial infarction were excluded. There were 260 incident HF cases. The men were divided into three groups of SUA concentrations/levels (<350, 350-410 and >410μmol/L)...
November 28, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/29208259/the-role-of-a-novel-long-noncoding-rna-tuc40-in-cardiomyocyte-induction-and-maturation-in-p19-cells
#11
Huijuan Li, Li Jiang, Zhangbin Yu, Shuping Han, Xuehua Liu, Mengmeng Li, Chun Zhu, Lixing Qiao, Li Huang
BACKGROUND: In previous studies, TUC40-, a new long noncoding RNA, was found to be overexpressed in human ventricular septal defect (VSD) embryonic heart samples. In this article, we carried out experiments on the P19 cell line to elucidate the effects of TUC40- overexpression on cardiomyocyte development relevant to VSD pathogenesis. METHODS: We established the overexpression cell model by plasmid transfection, and explored the expression profile of Pbx1, the sense gene of TUC40-, and the marker genes of cardiomyocyte linage commitment (Nkx2...
December 2017: American Journal of the Medical Sciences
https://www.readbyqxmd.com/read/29207933/prognostic-factors-for-in-hospital-mortality-of-patients-hospitalized-for-acutely-decompensated-heart-failure
#12
Štefica Dvornik, Teodora Zaninović Jurjević, Nikolina Jurjević, Amalija Lekić, Luka Zaputović
Objectives Despite improved treatment during last 20 years, prognosis for patients hospitalized for acutely decompensated heart failure (ADHF) is poor and mortality rates reported for these patients are high. Laboratory results can assist clinicians in evaluation and triaging of patients on hospital admission, and are important for the medical decision-making and prognosis assessments. Recently, new guidelines for the diagnosis and treatment of acute and chronic HF patients were published introducing a new group of patients with mid-range left ventricular ejection fraction (LVEF)...
December 5, 2017: Acta Clinica Belgica
https://www.readbyqxmd.com/read/29207072/transcription-factor-tbx18-promotes-adult-rat-bone-mesenchymal-stem-cell-differentiation-to-biological-pacemaker-cells
#13
Yanjun Li, Mei Yang, Gege Zhang, Le Li, Bingjie Ye, Congxin Huang, Yanhong Tang
Bone mesenchymal stem cells (BMSCs) are currently considered the optimal stem cells for biological pacemaker cell transformation. The cardiac‑specific transcription factor T‑Box protein 18 (TBX18) is essential for sinoatrial node (SAN) formation, particularly formation of the head region that generates the electrical impulses that induce heart contraction. The present study aimed to confirm the effects of TBX18 on biological pacemaker differentiation of rat BMSCs. Flow cytometry was used to identify the surface markers of BMSCs, in order to acquire pure mesenchymal stem cells...
November 16, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29204182/baseline-type-2-diabetes-had-a-significant-association-with-elevated-high-sensitivity-cardiac-troponin-t-levels-in-chinese-community-dwelling-population-a-5-year-prospective-analysis
#14
Shihui Fu, Rongjie Jin, Leiming Luo, Ping Ye
Background: The present analysis was designed to investigate the association of type 2 diabetes (T2D) with high sensitivity cardiac troponin T (hs-cTnT) during the 5 years of follow-up, and explore which one of fasting blood glucose (FBG) and postprandial blood glucose (PBG) is a determinant of this association in Chinese community-dwelling population. Methods: This prospective community-based analysis was conducted based on 730 participants without coronary artery disease and hs-cTnT values ≥14 pg/mL receiving two measurements of hs-cTnT levels at baseline and follow-up of 5 years...
2017: Nutrition & Metabolism
https://www.readbyqxmd.com/read/29203590/a-first-in-human-phase-1-study-of-subcutaneous-outpatient-recombinant-human-il-15-rhil-15-in-adults-with-advanced-solid-tumors
#15
Jeffrey S Miller, Chihiro Morishima, Douglas G McNeel, Manish R Patel, Holbrook E Kohrt, John A Thompson, Paul M Sondel, Heather A Wakelee, Mary L Disis, Judith C Kaiser, Martin A Cheever, Howard Streicher, Stephen P Creekmore, Thomas A Waldmann, Kevin C Conlon
PURPOSE: Preclinical data established Interleukin-15 as a homeostatic factor and powerful stimulator of NK and CD8+ T cell function, the basis for clinical testing. EXPERIMENTAL DESIGN: A first-in-human outpatient phase I dose escalation trial of subcutaneous (SC) rhIL-15 was conducted in refractory solid tumor cancer patients. Therapy consisted of daily (Monday - Friday) SC injections of rhIL-15 for two consecutive weeks (10 total doses/cycle). Clinical response was assessed by RECIST...
December 4, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29203498/perioperative-myocardial-injury-after-noncardiac-surgery-incidence-mortality-and-characterization
#16
Christian Puelacher, Giovanna Lurati Buse, Daniela Seeberger, Lorraine Sazgary, Stella Marbot, Andreas Lampart, Jaqueline Espinola, Christoph Kindler, Angelika Hammerer, Esther Seeberger, Ivo Strebel, Karin Wildi, Raphael Twerenbold, Jeanne du Fay de Lavallaz, Luzius Steiner, Lorenz Gurke, Tobias Breidthardt, Katharina Rentsch, Andreas Buser, Danielle M Gualandro, Stefan Osswald, Christian Mueller
Background -Perioperative myocardial injury (PMI) seems to be a contributor to mortality after noncardiac surgery. Because the vast majority of PMIs are asymptomatic, PMI usually is missed in the absence of systematic screening. Methods -We performed a prospective diagnostic study enrolling consecutive patients undergoing noncardiac surgery who had a planned postoperative stay of ≥24 hours and were considered at increased cardiovascular risk. All patients received a systematic screening using serial measurements of high-sensitivity cardiac troponin T in clinical routine...
December 4, 2017: Circulation
https://www.readbyqxmd.com/read/29199427/predictive-value-of-routine-point-of-care-cardiac-troponin-t-measurement-for-prehospital-diagnosis-and-risk-stratification-in-patients-with-suspected-acute-myocardial-infarction
#17
Martin B Rasmussen, Carsten Stengaard, Jacob T Sørensen, Ingunn S Riddervold, Troels M Hansen, Matthias Giebner, Claus-Henrik Rasmussen, Hans E Bøtker, Christian J Terkelsen
OBJECTIVE: The purpose of this study was to determine the predictive value of routine prehospital point-of-care cardiac troponin T measurement for diagnosis and risk stratification of patients with suspected acute myocardial infarction. METHODS AND RESULTS: All prehospital emergency medical service vehicles in the Central Denmark Region were equipped with a point-of-care cardiac troponin T device (Roche Cobas h232) for routine use in all patients with a suspected acute myocardial infarction...
December 1, 2017: European Heart Journal. Acute Cardiovascular Care
https://www.readbyqxmd.com/read/29198992/cardiac-troponin-and-adverse-outcomes-in-atrial-fibrillation-a-meta-analysis
#18
REVIEW
Yichuan Fan, Xingzhi Zhao, Xiaodong Li, Nan Li, Xinhua Hu
BACKGROUND: The prognostic value of cardiac troponin elevation in atrial fibrillation (AF) is unclear. OBJECTIVE: To investigate the association of cardiac troponin elevation with adverse outcomes in AF by conducting a meta-analysis. METHODS: We systematically searched the PubMed and Embase databases until April 2017 for studies assessing the association of cardiac troponin-T (cTnT) or troponin-I (cTnI) elevation with adverse outcomes in AF...
November 30, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/29197871/carvedilol-and-cardiac-biomarkers-in-dialysis-patients-secondary-analysis-of-a-randomized-controlled-trial
#19
Matthew A Roberts, Darsy Darssan, Sunil V Badve, Robert P Carroll, Magid A Fahim, Brian A Haluska, Carmel M Hawley, Nicole M Isbel, Mark R Marshall, Elaine M Pascoe, Eugenie Pedagogos, Helen L Pilmore, Paul Snelling, Tony Stanton, Ken-Soon Tan, Andrew M Tonkin, Liza A Vergara, Francesco L Ierino
BACKGROUND/AIMS: Cardiac biomarkers are associated with cardiac abnormalities and adverse outcomes in dialysis patients. Our aim was to report the effect of the beta-blocker carvedilol on cardiac biomarkers in adult dialysis patients. METHODS: The Beta-Blocker to Lower Cardiovascular Dialysis Events Feasibility Study was a randomized controlled trial comparing carvedilol to placebo. Serum and plasma were collected before the run-in, then 6 and 12 months post-randomization to measure B-type Natriuretic Peptide (BNP), N-terminal BNP (NT-ProBNP), high-sensitivity cardiac troponins I (hs-TnI) and T (hs-TnT), and galectin-3...
December 4, 2017: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/29187460/adjuvant-breast-cancer-treatments-induce-changes-in-homoarginine-level-a-prospective-observational-study
#20
Hanna Aula, Tanja Skyttä, Suvi Tuohinen, Tiina Luukkaala, Mari Hämäläinen, Vesa Virtanen, Pekka Raatikainen, Eeva Moilanen, Pirkko-Liisa Kellokumpu-Lehtinen
AIM: To identify patients with breast cancer at risk for cardiotoxicity, we evaluated homoarginine (HA) behavior during adjuvant treatment. PATIENTS AND METHODS: Eighty-one patients received radiotherapy (RT) with or without endocrine treatment, and 19 received chemotherapy, RT and endocrine therapy. Serum HA, asymmetric dimethylarginine (ADMA) and high-sensitivity cardiac troponin T (hscTnT) were measured and echocardiography was performed before chemotherapy, and before and after RT...
December 2017: Anticancer Research
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