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https://www.readbyqxmd.com/read/28416406/acute-stroke-despite-dabigatran-anticoagulation-treated-with-idarucizumab-and-intravenous-tissue-plasminogen-activator
#1
David Bissig, Rashmi Manjunath, Brittany R Traylor, David P Richman, Kwan L Ng
Dabigatran is a direct thrombin inhibitor used to reduce the risk of stroke in patients with nonvalvular atrial fibrillation. For patients who present with an acute stroke despite dabigatran therapy, clinical data on the use of intravenous tissue plasminogen activator (IV-tPA) is limited. There is an anticipated increased risk of symptomatic intracranial hemorrhage (sICH) when using IV-tPA in patients on dabigatran therapy. In 2015, the humanized monoclonal antibody fragment idarucizumab was approved for rapid (minutes) reversal of anticoagulant effects of dabigatran...
April 14, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28415789/hmga2-translocation-induced-in-skin-tumorigenesis
#2
Yong Li, Xiang-Ying Pi, Kelsey Boland, Sonali Lad, Kelly Johnson, Catherine Verfaillie, Rebecca J Morris
Hmga2 protein, a transcription factor involved in chromatin architecture, is expressed chiefly during development, where it has many key biological functions. When expressed in adult tissues from in various organs, Hmga2 is always related to cancer development. The role of Hmga2 in skin tumorigenesis is, however, not yet understood. We demonstrated that Hmga2 can be found in non-transformed epidermis, specifically located to the membrane of keratinocytes (KCs) in epidermis. Ex vivo culture of KCs and development of skin carcinomas in DMBA and TPA mouse models was associated with translocation of the Hmga2 protein from the membrane into the nucleus, where Hmga2 induced its own expression by binding to the Hmga2 promoter...
March 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28413568/triphenylamine-based-push-pull-molecule-for-photovoltaic-applications-from-synthesis-to-ultrafast-device-photophysics
#3
Oleg V Kozlov, Xiaomeng Liu, Yuriy N Luponosov, Alexander N Solodukhin, Victoria Y Toropynina, Jie Min, Mikhail I Buzin, Svetlana M Peregudova, Christoph J Brabec, Sergei A Ponomarenko, Maxim S Pshenichnikov
Small push-pull molecules attract much attention as prospective donor materials for organic solar cells (OSCs). By chemical engineering, it is possible to combine a number of attractive properties such as broad absorption, efficient charge separation, and vacuum and solution processabilities in a single molecule. Here we report the synthesis and early time photophysics of such a molecule, TPA-2T-DCV-Me, based on the triphenylamine (TPA) donor core and dicyanovinyl (DCV) acceptor end group connected by a thiophene bridge...
March 30, 2017: Journal of Physical Chemistry. C, Nanomaterials and Interfaces
https://www.readbyqxmd.com/read/28412773/massive-subretinal-and-subretinal-pigment-epithelial-hemorrhage-displacement-with-perfluorocarbon-liquid-using-a-two-step-vitrectomy-technique
#4
Efrat Fleissig, Adiel Barak, Michaela Goldstein, Anat Loewenstein, Shulamit Schwartz
PURPOSE: The purpose of this study was to evaluate the efficacy and visual outcome of massive submacular hemorrhage (SMH) displacement with a planned two-step pars plana vitrectomy (PPV) using tissue plasminogen activator (tPA) and perfluorocarbon liquid (PFCL) tamponade. METHODS: A retrospective case series of patients with age related macular degeneration and SMH was used. All patients underwent a 23G PPV, subretinal tPA injection and a medium term PFCL tamponade...
April 15, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28408066/derivation-and-validation-of-a-scoring-system-for-intravenous-tissue-plasminogen-activator-use-in-asian-patients
#5
Leonard L L Yeo, Shih-Chao Chien, Jr-Rung Lin, Chia-Wei Liow, Jiann-Der Lee, Tsung-I Peng, Teoh Hock Luen, Vijay Sharma, Bernard Chan, Tsong-Hai Lee
BACKGROUND AND PURPOSE: As Chinese Asian populations have an increased risk of intracerebral hemorrhage (ICH) after intravenous tissue plasminogen activator (IV tPA), we aimed to design a rapid, clinically applicable risk scoring system to predict ICH and functional outcomes after IV tPA treatment in Asian ischemic stroke patients. METHODS: From January 2009 to December 2012, consecutive acute ischemic stroke patients treated with IV tPA recruited from the Stroke Registry in Chang Gung Healthcare System (SRICHS) in Taiwan and the National University Hospital of Singapore (NUHS) acute stroke database were used to create and validate a scoring system...
April 10, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28406749/nucleosome-repositioning-during-differentiation-of-a-human-myeloid-leukemia-cell-line
#6
Vladimir B Teif, Jan-Philipp Mallm, Tanvi Sharma, David B Mark Welch, Karsten Rippe, Roland Eils, Jörg Langowski, Ada L Olins, Donald E Olins
Cell differentiation is associated with changes in chromatin organization and gene expression. In this study, we examine chromatin structure following differentiation of the human myeloid leukemia cell line (HL-60/S4) into granulocytes with retinoic acid (RA) or into macrophage with phorbol ester (TPA). We performed ChIP-seq of histone H3 and its modifications, analyzing changes in nucleosome occupancy, nucleosome repeat length, eu-/heterochromatin redistribution and properties of epichromatin (surface chromatin adjacent to the nuclear envelope)...
March 4, 2017: Nucleus
https://www.readbyqxmd.com/read/28405804/cytoprotective-drug-tissue-plasminogen-activator-protease-interaction-assays-screening-of-two-novel-cytoprotective-chromones
#7
Paul A Lapchak, Jacqueline M Lara, Paul D Boitano
Tissue plasminogen activator (tPA) is currently used in combination with endovascular procedures to enhance recanalization and cerebral reperfusion and is also currently administered as standard-of-care thrombolytic therapy to patients within 3-4.5 h of an ischemic stroke. Since tPA is not neuroprotective or cytoprotective, adjuvant therapy with a neuroprotective or an optimized cytoprotective compound is required to provide the best care to stroke victims to maximally promote clinical recovery. In this article, we describe the use of a sensitive standardized protease assay with CH3SO2-D-hexahydrotyrosine-Gly-Arg-p-nitroanilide•AcOH, a chromogenic protease substrate that is cleaved to 4-nitroaniline (p-nitroaniline) and measured spectrophotometrically at 405 nm (OD405 nm), and how the assay can be used as an effective screening assay to study drug-tPA interactions...
April 12, 2017: Translational Stroke Research
https://www.readbyqxmd.com/read/28401413/concentration-dependent-approach-for-accurate-determination-of-two-photon-absorption-cross-section-of-fluorescent-dye-molecule
#8
Sandeep Kumar Maurya, Chayan Dutta, Debabrata Goswami
We have investigated the concentration dependent of two-photon induced fluorescence (TPIF) in methanolic solution of Rhodamine 6G and Rhodamine B dye using 120 fs laser pulses at 780 nm, 76 MHz repetition rate. TPIF study of these dyes was compared with their respective one photon fluorescence intensity. We have shown the effect of chopper on TPIF intensity from Rhodamine dyes, which have shown direct influence on the determined TPA Cross section of these dyes.
April 11, 2017: Journal of Fluorescence
https://www.readbyqxmd.com/read/28400900/conjugate-eye-deviation-on-ct-associated-with-worse-outcomes-despite-iv-thrombolysis
#9
Nirav H Shah, Nirav Bhatt, Anita Tipirneni, Diego Condes, Priyank Khandelwal, Jose G Romano
INTRODUCTION: Rapid stroke management has significant implications in patient outcomes. Ipsilateral computed tomography conjugate eye deviation (CT-CED) has been associated with worse outcomes but has never been evaluated as predictive of vascular occlusion. To test the hypothesis that CT-CED is a marker for vascular occlusion, we evaluated patients treated with intravenous tissue plasminogen activator (IV tPA). METHODS: We performed a retrospective analysis of patients with acute ischemic stroke treated with IV tPA at a large tertiary care hospital over an 18-month period...
April 2017: Neurohospitalist
https://www.readbyqxmd.com/read/28400899/how-a-ct-direct-protocol-at-an-american-comprehensive-stroke-center-led-to-door-to-needle-times-less-than-30-minutes
#10
Lisa M Caputo, Judd Jensen, Michelle Whaley, Mark J Kozlowski, Christopher V Fanale, Jeffrey C Wagner, Alessandro Orlando, David Bar-Or
BACKGROUND AND PURPOSE: The safety and efficacy of intravenous tissue plasminogen activator (IV tPA) following acute ischemic stroke (AIS) is dependent on its timely administration. In 2014, our Comprehensive Stroke Center designed and implemented a computed tomography-Direct protocol to streamline the evaluation process of suspected patients with AIS, with the aim of reducing door-to-needle (DTN) times. The objectives of our study were to describe the protocol development and implementation process, and to compare DTN times and symptomatic intracranial hemorrhage (sICH) rates before and after protocol implementation...
April 2017: Neurohospitalist
https://www.readbyqxmd.com/read/28399375/understanding-the-value-of-individualized-information-the-impact-of-poor-calibration-or-discrimination-in-outcome-prediction-models
#11
Natalia Olchanski, Joshua T Cohen, Peter J Neumann, John B Wong, David Kent
BACKGROUND: Risk prediction models allow for the incorporation of individualized risk and clinical effectiveness information to identify patients for whom therapy is most appropriate and cost-effective. This approach has the potential to identify inefficient (or harmful) care in subgroups at different risks, even when the overall results appear favorable. Here, we explore the value of personalized risk information and the factors that influence it. METHODS: Using an expected value of individualized care (EVIC) framework, which monetizes the value of customizing care, we developed a general approach to calculate individualized incremental cost effectiveness ratios (ICERs) as a function of individual outcome risk...
April 1, 2017: Medical Decision Making: An International Journal of the Society for Medical Decision Making
https://www.readbyqxmd.com/read/28395964/inertial-cavitation-ultrasound-with-microbubbles-improves-reperfusion-efficacy-when-combined-with-tissue-plasminogen-activator-in-an-in%C3%A2-vitro-model-of-microvascular-obstruction
#12
Akash Goyal, Francois T H Yu, Mathea G Tenwalde, Xucai Chen, Andrew Althouse, Flordeliza S Villanueva, John J Pacella
We have previously reported that long-tone-burst, high-mechanical-index ultrasound (US) and microbubble (MB) therapy can restore perfusion in both in vitro and in vivo models of microvascular obstruction (MVO). Addition of MBs to US has been found to potentiate the efficacy of thrombolytics on large venous thrombi; however, the optimal US parameters for achieving microvascular reperfusion of MVO caused by microthrombi, when combined with tissue plasminogen activator (tPA), are unknown. We sought to elucidate the specific effects of US, with and without tPA, for effective reperfusion of MVO in an in vitro model using both venous and arterial microthrombi...
April 7, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28395821/interactions-between-soluble-dietary-fibers-and-wheat-gluten-in-dough-studied-by-confocal-laser-scanning-microscopy
#13
Qian Li, Rui Liu, Tao Wu, Min Zhang
Four soluble dietary fiber (SDF) fractions characterized by major components of AXs, relatively narrow molecular weight distribution, different substituted ratio, and structure-sensitive parameter (ρ) were prepared from wheat bran. The fractions were added to wheat dough to determine the interactions between the dough's network and the SDF fractions relative to their physicochemical characteristics. Furthermore, a comprehensive study focusing on the dough texture characteristic, tensile properties, thermodynamic stability, and the microstructure was conducted by performing texture profile analysis (TPA), differential scanning calorimetry (DSC), and confocal laser scanning microscopy (CLSM) experiments...
May 2017: Food Research International
https://www.readbyqxmd.com/read/28394081/the-effect-of-low-level-laser-therapy-as-an-adjunct-to-non-surgical-periodontal-treatment-on-gingival-crevicular-fluid-levels-of-transforming-growth-factor-beta-1-tissue-plasminogen-activator-and-plasminogen-activator-inhibitor-1-in-smoking-and-non-smoking
#14
F Pamuk, M Lütfioğlu, A Aydoğdu, C Z Koyuncuoglu, E Cifcibasi, O S Badur
BACKGROUND AND OBJECTIVE: This study aimed to investigate the effects of low-level laser therapy (LLLT) as an adjunct to scaling and root planing (SRP) on smoking and non-smoking patients with chronic periodontitis. MATERIAL AND METHODS: The study was conducted using a split-mouth design with 30 patients with chronic periodontitis (15 smokers, 15 non-smokers) and 30 healthy individuals matched for age, sex and smoking status as controls. Groups were constituted as follows: Cp+SRP+Sham: non-smokers with chronic periodontitis treated with SRP; Cp+SRP+LLLT: non-smokers with chronic periodontitis treated with SRP+LLLT; SCp+SRP+Sham: smokers with chronic periodontitis treated with SRP; SCp+SRP+LLLT: smokers with chronic periodontitis treated with SRP+LLLT; C: control group comprised of periodontally healthy non-smokers; SC: control group comprised of periodontally healthy smokers...
April 10, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/28393614/current-and-future-perspectives-on-the-treatment-of-cerebral-ischemia
#15
REVIEW
Brandon R Christophe, Shyle H Mehta, Andrew L A Garton, Jonathan Sisti, E Sander Connolly
After heart disease and combined forms of cancer, stroke is the leading cause of death in the United States. Currently, tissue-plasminogen activator (tPA) thrombolysis is the only thrombolytic therapy that has been shown to improve patient outcome. Presently, the only antithrombotic drug treatment that has proven effective at improving acute ischemic stroke patient outcome is aspirin administration. Despite these studies, no clinical trials have yet demonstrated a reliably effective pharmacological treatment...
April 2017: Expert Opinion on Pharmacotherapy
https://www.readbyqxmd.com/read/28391833/selective-determination-of-aromatic-acids-by-new-magnetic-hydroxylated-mwcnts-and-mofs-based-composite
#16
Wen-Kui Li, Juan Chen, Hai-Xia Zhang, Yan-Ping Shi
A novel, efficient, and high-selectivity magnetic solid-phase extraction (MSPE) adsorbent based on Fe3O4 nanoparticles, hydroxylated multi-walled carbon nanotubes (MWCNTs-OH) and metal-organic frameworks (MOFs) was prepared and applied for trace aromatic acids determination in solid samples by applying a template-free in situ strategy. The morphology, configuration and magnetic behavior of the adsorbent were characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectra, and vibrating sample magnetometer (VSM)...
June 1, 2017: Talanta
https://www.readbyqxmd.com/read/28391831/pamam-dendrimers-a-multifunctional-nanomaterial-for-ecl-biosensors
#17
Sudeshna Chandra, Michael Mayer, Antje J Baeumner
Polyamido amine (PAMAM) dendrimers have been shown to function as electrochemiluminescence (ECL) co-reactant and have the inherent capability of improving immobilization of molecules on surfaces due to their dendritic structure. Here, we investigated the combination of both of these properties as the basis for biosensor development. Dendrimers with 5, 8, 10 and 16 terminal amine groups, respectively, were used. These were covalently coupled to biotin as model recognition site, and tagged with Ru(bpy)3(2+) via adsorption...
June 1, 2017: Talanta
https://www.readbyqxmd.com/read/28384594/vascular-closure-devices-in-stroke-patients-receiving-tissue-plasminogen-activator-a-retrospective-analysis-from-an-academic-tertiary-medical-center-and-a-teaching-community-hospital-stroke-database
#18
Mangaladevi S Patil, Mahesh V Jayaraman, Sun H Ahn
OBJECTIVES: To determine the safety and effectiveness of vascular closure devices in prevention of access site complications in acute stroke patient receiving intravenous (IV) and/or intra-arterial (IA) IV tissue plasminogen activator (tPA). PATIENTS AND METHODS: All patients with acute stroke onset treated with IV and/or IA tPA closed with vascular closure device and adult age (>18 years) were identified from an academic tertiary medical center and a teaching community hospital stroke database for 9 years (from March 2005 to June 2014)...
March 29, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28382920/surgical-treatment-of-a-proximal-diaphyseal-tibial-deformity-associated-with-partial-caudal-and-cranial-cruciate-ligament-deficiency-and-patella-baja
#19
S Vincenti, S Knell, A Pozzi
Caudal cruciate ligament injury can be a complication following tibial plateau leveling osteotomy (TPLO) (Slocum und Slocum, 1993) especially if the post-operative Tibial Plateau Angle (TPA) is less than 5 degree. We describe a case of negative TPA associated with partial cranial and caudal ligament rupture treated with a center of rotation of angulation (CORA) based cranial tibial opening wedge osteotomy and tibial tuberosity transposition. A 13 kg, mixed breed dog was presented for right pelvic limb lameness...
April 2017: Schweizer Archiv Für Tierheilkunde
https://www.readbyqxmd.com/read/28382372/mechanism-of-plasmin-generation-by-s100a10
#20
Victoria A Miller, Patricia A Madureira, Ain Adilliah Kamaludin, Jeffrey Komar, Vandna Sharma, Girish Sahni, Craig Thelwell, Colin Longstaff, David M Waisman
Plasminogen (Pg) is cleaved to form plasmin by the action of specific plasminogen activators such as the tissue plasminogen activator (tPA). Although the interaction of tPA and Pg with the surface of the fibrin clot has been well characterised, their interaction with cell surface Pg receptors is poorly understood. S100A10 is a cell surface Pg receptor that plays a key role in cellular plasmin generation. In the present report, we have utilised domain-switched/deleted variants of tPA, truncated plasminogen variants and S100A10 site-directed mutant proteins to define the regions responsible for S100A10-dependent plasmin generation...
April 6, 2017: Thrombosis and Haemostasis
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