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https://www.readbyqxmd.com/read/28633141/interaction-of-soluble-cxc-ligand-16-and-cardiac-injury-markers-in-hemodialysis-patients
#1
Wenjin Liu, Lulu Wang, Yongyue Wei, Xiurong Li, Chaoqing Gao, Jianmei Zhou, Liang Wang, Zhuxing Sun, Hong Chu, Youwei Bai, Junwei Yang
BACKGROUND: Recent data suggest that there is a pathogenic role for CXC ligand 16 (CXCL16) in cardiovascular diseases. Little is known about circulating CXCL16 in patients with kidney dysfunction. We explored the relationships of plasma CXCL16 with cardiac injury markers in a group of dialysis patients. METHODS: Plasma CXCL16 and C-reactive protein (CRP) were measured in 366 patients who were on maintenance hemodialysis. Cardiac injury was evaluated via measurements of the circulating B-type natriuretic peptide (BNP), N-terminal prohormone of brain natriuretic peptide (NT proBNP), Troponin I (TnI), and Troponin T (TnT)...
June 21, 2017: American Journal of Nephrology
https://www.readbyqxmd.com/read/28632960/snap-tag-based-subcellular-proteins-labeling-and-fluorescent-imaging-with-naphthalimides
#2
Chao Wang, Xinbo Song, Yi Xiao
Genetically encoded technologies provide methods for specific labeling and imaging of proteins, which is essential for the understanding of their subcellular localization and function. Herein, we employ naphthalimide, an efficient two-photon fluorophore, to develop O6-benzylguanine (BG) derivatives for specific labeling of subcellular proteins and fluorescent imaging through the SNAP-tag. The three naphthalimide-BG derivatives, TNI-BG, QNI-BG and ONI-BG are conveniently synthesized through modular "click chemistry" with high yields...
June 20, 2017: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/28624390/nkx2-5-enhances-the-efficacy-of-mesenchymal-stem-cells-transplantation-in-treatment-heart-failure-in-rats
#3
Bo Deng, Jin Xin Wang, Xing Xing Hu, Peng Duan, Lin Wang, Yang Li, Qing Lei Zhu
AIMS: The aim of this study is to determine whether Nkx2.5 transfection of transplanted bone marrow mesenchymal stem cells (MSCs) improves the efficacy of treatment of adriamycin-induced heart failure in a rat model. MAIN METHODS: Nkx2.5 was transfected in MSCs by lentiviral vector transduction. The expressions of Nkx2.5 and cardiac specific genes in MSCs and Nkx2.5 transfected mesenchymal stem cells (MSCs-Nkx2.5) were analyzed with quantitative real-time PCR and Western blot in vitro...
June 14, 2017: Life Sciences
https://www.readbyqxmd.com/read/28618428/the-impact-of-circulating-mitochondrial-dna-on-cardiomyocyte-apoptosis-and-myocardial-injury-after-tlr4-activation-in-experimental-autoimmune-myocarditis
#4
Bangwei Wu, Huanchun Ni, Jian Li, Xinyu Zhuang, Jinjin Zhang, Zhiyong Qi, Qiying Chen, Zhichao Wen, Haiming Shi, Xinping Luo, Bo Jin
BACKGROUND/AIMS: Mitochondrial DNA (mtDNA), acting as a newly found 'danger-associated molecular patterns' (DAMPs), is released into circulation upon tissue injury and performs as a considerable activator of inflammation and immune response. However, the role of circulating mtDNA in experimental autoimmune myocarditis (EAM) as well as Toll like receptor4 (TLR4) mediated cardiac inflammation and injury remains unknown. METHODS: A model of EAM was established in BALB/c mice by immunization with porcine cardiac myosin...
June 15, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28610961/histone-acetylation-favours-the-cardiovascular-commitment-of-adipose-tissue-derived-stromal-cells
#5
Elena De Falco, Antonella Bordin, Eleonora Scaccia, Francesca Pagano, Mohsen Ibrahim, Leonardo Schirone, Francesco Angelini, Silvia Palmerio, Michele Madonna, Luca Fianchini, Isotta Chimenti, Sebastiano Sciarretta, Giacomo Frati
BACKGROUND: Although adipose stromal cells (ASCs) retain the ability to transdifferentiate at low rate towards the cardiac lineage, the potential mechanisms underlying such process have still to be elucidated. METHODS: Since chromatin state modifications are involved in several processes regulating the cellular cell fate commitment, we aimed at evaluating the role of histone protein acetylation in the cardiovascular-like transdifferentiation of ASCs. RESULTS: We found a clear increase of histone 3 acetylation status paralleled by a significant upregulation of cardiac TnI gene expression, in ASCs treated with the conditioned medium of primary cardiomyocyte cell cultures for 72h...
June 2, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28588346/a-rational-adoption-of-the-high-sensitive-assay-for-cardiac-troponin-i-in-diagnostic-routine
#6
Antonio Croce, Pietro Brunati, Carlo Colzani, Riccardo Terramocci, Stefano Favero, Gabriele Bordoni, Claudio Galli
We describe the adoption of high sensitive troponin I (hsTnI) in clinical practice in two hospital settings in Italy. Samples from 426 consecutive patients (mean age 68.8 ± 17.0) admitted to the Emergency Department with a suspected acute coronary syndrome (ACS) have been tested at admittance and after 3 and 6 hours by contemporary TnI and hsTnI. Results have been compared to the final clinical diagnosis. Troponin was detectable in 68.6% by TnI and 89.9% by hsTnI. Since hsTnI has a lower threshold for females, 38/41 patients with positive values only by hsTnI were women...
2017: Disease Markers
https://www.readbyqxmd.com/read/28573785/biomarker-release-after-percutaneous-coronary-intervention-in-patients-without-established-myocardial-infarction-as-assessed-by-cardiac-magnetic-resonance-with-late-gadolinium-enhancement
#7
Rodrigo Morel Vieira de Melo, Whady Hueb, Cesar Higa Nomura, Expedito Eustáquio Ribeiro da Silva, Alexandre Volney Villa, Fernando Teiichi Costa Oikawa, Leandro Menezes Alves da Costa, Paulo Cury Rezende, Cibele Larrosa Garzillo, Eduardo Gomes Lima, Jose Antonio Franchini Ramires, Roberto Kalil Filho
OBJECTIVES: This study aimed to evaluate the amount and pattern of cardiac biomarker release after elective percutaneous coronary intervention (PCI) in patients without evidence of a new myocardial infarction (MI) after the procedure as assessed by cardiac magnetic resonance (CMR) with late gadolinium enhancement (LGE). BACKGROUND: The release of myocardial necrosis biomarkers after PCI frequently occurs. However, the correlation between biomarker release and the diagnosis of procedure-related MI type 4a has been controversial...
June 2, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28554556/dramatic-elevation-in-urinary-amino-terminal-titin-fragment-excretion-quantified-by-immunoassay-in-duchenne-muscular-dystrophy-patients-and-in-dystrophin-deficient-rodents
#8
Alan S Robertson, Mark J Majchrzak, Courtney M Smith, Robert C Gagnon, Nino Devidze, Glen B Banks, Sean C Little, Fizal Nabbie, Denise I Bounous, Janet DiPiero, Leslie K Jacobsen, Linda J Bristow, Michael K Ahlijanian, Stephen A Stimpson
Enzyme-linked and electrochemiluminescence immunoassays were developed for quantification of amino (N-) terminal fragments of the skeletal muscle protein titin (N-ter titin) and qualified for use in detection of urinary N-ter titin excretion. Urine from normal subjects contained a small but measurable level of N-ter titin (1.0 ± 0.4 ng/ml). A 365-fold increase (365.4 ± 65.0, P = 0.0001) in urinary N-ter titin excretion was seen in Duchene muscular dystrophy (DMD) patients. Urinary N-ter titin was also evaluated in dystrophin deficient rodent models...
July 2017: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/28535620/a-case-of-false-positive-troponin-i-in-a-patient-affected-by-cryoglobulinemic-vasculitis
#9
M Bellan, M Pirisi, G Bellomo, P P Sainaghi
Troponin I (TnI) false positive results have been reported in patients affected by immune disorders. We report the case of a 74-year-old woman affected by cryoglobulinemic vasculitis, admitted to the Emergency Room because of a lipotimic episode. A marked elevation of TnI plasma concentration was confirmed in multiple determinations, despite the absence of symptoms or electrocardiogram findings suggesting myocardial infarction. TnI plasma concentration was reported normal after re-testing with a different commercial kit...
May 22, 2017: Reumatismo
https://www.readbyqxmd.com/read/28534391/understanding-electron-transport-in-disk-shaped-triphenylene-tris-naphthaleneimidazole-s-through-structural-modification-and-theoretical-investigation
#10
Yue Zhang, David A Hanifi, M Paz Fernández-Liencres, Liana M Klivansky, Biwu Ma, Amparo Navarro, Yi Liu
Disk-shaped molecules with large aromatic π-surfaces are a class of organic semiconductors in which the charge-carrier transport properties could be greatly facilitated by preferred intermolecular stacking of the π-surfaces. The optical and electronic properties are not only determined by the core aromatic structure of these disk-shaped molecules but are also strongly dependent on the side chains, which directly impact the molecular self-assembly behavior in condensed phases. Triphenylene-tris(naphthaleneimidazole) (TP-TNI) is a recently reported n-type semiconductor featuring a large π-core and branched side chains, with an electron-transporting mobility reaching 10(-4) cm(2) V(-1) s(-1)...
June 2, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28533433/changes-in-the-dynamics-of-the-cardiac-troponin-c-molecule-explain-the-effects-of-ca-2-sensitizing-mutations
#11
Charles M Stevens, Kaveh Rayani, Gurpreet Singh, Bairam Lotfalisalmasi, D Peter Tieleman, Glen F Tibbits
Cardiac troponin C (cTnC) is the regulatory protein that initiates cardiac contraction in response to Ca(2+) TnC binding Ca(2+) initiates a cascade of protein-protein interactions that begins with the opening of the N-terminal domain of cTnC, followed by cTnC binding the Troponin I switch peptide (TnISW). We have evaluated, through isothermal titration calorimetry (ITC) and MD simulation, the effect of several clinically relevant mutations (A8V, L29Q, A31S, L48Q, Q50R and C84Y) on the Ca(2+) affinity, structural dynamics, and calculated interaction strengths between cTnC and each of Ca(2+) and TnISW Surprisingly the Ca(2+) affinity measured by ITC was only significantly affected by half of these mutations, with the exceptions of the L48Q, Q50R and C84Y mutants, which had an affinity 10-fold, 3-fold and 3-fold higher than wild-type, respectively...
May 22, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28533151/low-rates-of-androgen-deprivation-therapy-use-with-salvage-radiation-therapy-in-patients-with-prostate-cancer-after-radical-prostatectomy
#12
David D Yang, Vinayak Muralidhar, Brandon A Mahal, Michelle D Nezolosky, Shelby A Labe, Marie E Vastola, Ninjin Boldbaatar, Martin T King, Neil E Martin, Peter F Orio, Tni K Choueiri, Quoc-Dien Trinh, Robert B Den, Daniel E Spratt, Karen E Hoffman, Felix Y Feng, Paul L Nguyen
OBJECTIVE: The RTOG 9601 and GETUG-AFU 16 randomized controlled trials demonstrated that the addition of androgen deprivation therapy (ADT) to salvage radiation therapy (SRT) improves progression-free and, for RTOG 9601, overall survival. We examined national trends in the use of ADT with SRT. MATERIALS AND METHODS: Of the 484,009 patients in the National Cancer Database from 2004 to 2012 with localized or locally advanced prostate cancer treated with radical prostatectomy (RP), 4,200 men received SRT (≥6mo after surgery)...
May 19, 2017: Urologic Oncology
https://www.readbyqxmd.com/read/28525735/structure-based-rational-design-of-self-inhibitory-peptides-to-disrupt-the-intermolecular-interaction-between-the-troponin-subunits-c-and-i-in-neuropathic-pain
#13
Junmin Yu, Shilei Wang, Junjie Yu, Chuansheng Liu, Fenghe Xu, Shijie Wang, Yusheng Yi, Yanwei Yin
The troponin (Tn) is a ternary complex consisting of three subunits TnC, TnI and TnT; molecular disruption of the Tn complex has been recognized as an attractive strategy against neuropathic pain. Here, a self-inhibitory peptide is stripped from the switch region of TnI interaction interface with TnC, which is considered as a lead molecular entity and then used to generate potential peptide disruptors of TnC-TnI interaction based on a rational molecular design protocol. The region is a helical peptide segment capped by N- and C-terminal disorders...
May 3, 2017: Bioorganic Chemistry
https://www.readbyqxmd.com/read/28506648/antegrade-versus-continuous-retrograde-del-nido-cardioplegia-in-the-david-i-operation
#14
Xuan Jiang, Tianxiang Gu, Enyi Shi, Chun Wang, Zongyi Xiu, Guangwei Zhang
BACKGROUND: The efficacy of continuous retrograde del Nido cardioplegia for myocardial protection is still controversial. We hypothesised that antegrade and retrograde cardioplegia offer equivalent safety for myocardial protection in the David I procedure. METHODS: We retrospectively reviewed 33 patients undergoing the David I operation with antegrade or retrograde del Nido solution from June 2014 to January 2016. The outcomes were compared. The follow-up was 1 month to 15 months...
April 26, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28492423/a-survey-of-the-opinion-and-experience-of-uk-dentists-part-3-an-evidence-based-protocol-of-surgical-risk-management-strategies-in-the-mandible
#15
Cemal Ucer, Zehra Yilmaz, Edwin Scher, Jon Suzuki, Tara Renton
BACKGROUND: Implant surgery in the mandible can cause serious complications that can be life threatening. The incidence and cause of iatrogenic trigeminal nerve injury (TNI) related to dental implant surgery was investigated in a survey of the opinion and experience of the UK dentists and reported by the authors in part 1 of this series of articles. Part 2 reported on the risk assessment and management of implant-related inferior alveolar nerve (IAN), mental nerve (MN), and lingual nerve (LN) injuries...
May 10, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28480501/arterial-switch-operation-and-plasma-biomarkers-analysis-and-correlation-with-early-postoperative-outcomes
#16
Raffaele Giordano, Massimiliano Cantinotti, Luigi Arcieri, Vincenzo Poli, Vitali Pak, Bruno Murzi
The aims of our study were to describe plasma brain natriuretic peptide (BNP), Troponin I (TnI), and Cystatin C (Cys-C) concentration kinetics in the postoperative period after arterial switch operation in neonate, and to test the correlation between the plasma biomarkers and early clinical outcomes. We prospectively enrolled 29 neonates who underwent ASO. All patients received Custodiol cardioplegia. Blood samples were collected preoperatively (one day before) and in the ICU immediately after admission, and then 6, 12, 24, and 48 h after surgery...
May 8, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28469574/simvastatin-promotes-cardiac-myocyte-relaxation-in-association-with-phosphorylation-of-troponin-i
#17
David A MacDougall, Sara D Pugh, Harpreet S Bassi, Sabine Lotteau, Karen E Porter, Sarah Calaghan
The number of people taking statins is set to increase across the globe due to recent changes in prescription guidelines. For example, half the US population over 40 is now eligible for these drugs, whether they have high serum cholesterol or not. With such development in policy comes a stronger need for understanding statins' myriad of effects. Surprisingly little is known about possible direct actions of statins on cardiac myocytes, although claims of a direct myocardial toxicity have been made. Here, we determine the impact of simvastatin administration (40 mg/kg/day) for 2 weeks in normocholesterolemic rats on cardiac myocyte contractile function and identify an underlying mechanism...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28466882/asia-pacific-consensus-statement-on-the-optimal-use-of-high-sensitivity-troponin-assays-in-acute-coronary-syndromes-diagnosis-focus-on-hs-tni
#18
COMMENT
Jack Wei Chieh Tan, Carolyn S P Lam, Sazzli Shahlan Kasim, Tar Choon Aw, Joel M Abanilla, Wei-Ting Chang, Van Phuoc Dang, Maria Iboleon-Dy, Sari Sri Mumpuni, Arintaya Phommintikul, Manh Cuong Ta, Punkiat Topipat, Kai Hang Yiu, Louise Cullen
OBJECTIVE: High-sensitivity troponin (hs-Tn) assays need to be applied appropriately to improve diagnosis and patient outcomes in acute coronary syndromes (ACS). METHODS: Experts from Asia Pacific convened in 2015 to provide data-driven consensus-based, region-specific recommendations and develop an algorithm for the appropriate incorporation of this assay into the ACS assessment and treatment pathway. RESULTS: Nine recommendations were developed by the expert panel: (1) troponin is the preferred cardiac biomarker for diagnostic assessment of ACS and is indicated for patients with symptoms of possible ACS; (2) hs-Tn assays are recommended; (3) serial testing is required for all patients; (4) testing should be performed at presentation and 3 hours later; (5) gender-specific cut-off values should be used for hs-Tn I assays; (6) hs-Tn I level >10 times the upper limit of normal should be considered to 'rule in' a diagnosis of ACS; (7) dynamic change >50% in hs-Tn I level from presentation to 3-hour retest identifies patients at high risk for ACS; (8) where only point-of-care testing is available, patients with elevated readings should be considered at high risk, while patients with low/undetectable readings should be retested after 6 hours or sent for laboratory testing and (9) regular education on the appropriate use of troponin tests is essential...
2017: Heart Asia
https://www.readbyqxmd.com/read/28438640/neutralizing-il-6-reduces-heart-injury-by-decreasing-nerve-growth-factor-precursor-in-the-heart-and-hypothalamus-during-rat-cardiopulmonary-bypass
#19
Chi Cheng, Jun-Mei Xu, Tian Yu
AIMS: To investigate whether the expression of nerve growth factor precursor (proNGF) changes during cardiopulmonary bypass (CPB) and whether neutralizing interleukin-6 (IL-6) during CPB has cardiac benefits. MAIN METHODS: Thirty patients undergoing CPB were recruited and their serum proNGF and troponin-I (TNI) were detected. In addition, rats were divided into three groups: CPB group, CPB with cardiac ischemia-reperfusion (IR) group, and a control group. The pre-CPB standard deviation of N-N intervals (SDNN) and post-CPB SDNN were compared...
June 1, 2017: Life Sciences
https://www.readbyqxmd.com/read/28383401/establishment-of-a-reference-interval-for-high-sensitivity-cardiac-troponin-i-in-healthy-adults-from-the-sichuan-area
#20
Shunjun Li, Yue Zuo, Wenfang Huang
High-sensitivity cardiac troponin I (hs-cTnI) has been used in the diagnosis and risk stratification of acute myocardial infarction. However, there is no common consensus on an hs-cTnI reference interval for the Chinese population. The aim of this study was to describe the distribution of hs-TnI and establish the 99th percentile reference interval for hs-cTnI in healthy adults from the Sichuan area.Serum specimens were collected from 1485 healthy adults (731 men and 754 women ranging in age from 18 to 85 years) in Sichuan Provincial People's Hospital...
April 2017: Medicine (Baltimore)
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