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https://www.readbyqxmd.com/read/27919309/cost-utility-analysis-of-primary-prophylaxis-compared-with-on-demand-treatment-for-patients-with-severe-hemophilia-type-a-in-colombia
#1
Héctor Eduardo Castro Jaramillo, Mabel Moreno Viscaya, Aurelio E Mejia
OBJECTIVES: This article presents a cost-utility analysis from the Colombian health system perspective comparing primary prophylaxis to on-demand treatment using exogenous clotting factor VIII (FVIII) for patients with severe hemophilia type A. METHODS: We developed a Markov model to estimate expected costs and outcomes (measured as quality-adjusted life-years, QALYs) for each strategy. Transition probabilities were estimated using published studies; utility weights were obtained from a sample of Colombian patients with hemophilia and costs were gathered using local data...
December 6, 2016: International Journal of Technology Assessment in Health Care
https://www.readbyqxmd.com/read/27913070/basagran-%C3%A2-induces-developmental-malformations-and-changes-the-bacterial-community-of-zebrafish-embryos
#2
Jacinta M M Oliveira, Victor Galhano, Isabel Henriques, Amadeu M V M Soares, Susana Loureiro
This study aimed to assess the effects of Basagran(®) on zebrafish (Danio rerio) embryos. The embryos were exposed to Basagran(®) at concentrations ranging from 120.0 to 480.6 mg/L, and the effects on embryo development (up to 96 h) and bacterial communities of 96 h-larvae were assessed. The embryo development response was time-dependent and concentration-dependent (106.35 < EC50 < 421.58 mg/L). The sensitivity of embryo-related endpoints decreased as follows: blood clotting in the head and/or around the yolk sac > delay or anomaly in yolk sac absorption > change in swimming equilibrium > development of pericardial and/or yolk sac oedema > scoliosis...
November 29, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27909267/comparison-of-green-pit-viper-and-agkistrodon-halys-antivenom-in-inhibition-of-coagulopathy-due-to-trimeresurus-albolabris-venom-an-in-vitro-study-using-human-plasma
#3
S K Lam, S F Yip, P Crow, H T Fung, J Mh Cheng, K S Tan, O F Wong, D Yt Yeung, Y K Wong, K M Poon, G Ades
INTRODUCTION: There are two antivenoms that may be administered in Hong Kong following a bite by Trimeresurus albolabris: the green pit viper antivenom from the Thai Red Cross Society in Thailand and the Agkistrodon halys antivenom from the Shanghai Institute of Biological Products in China. Both are recommended by the Central Coordinating Committee of Accident and Emergency Services of the Hospital Authority for treating patients with a bite by Trimeresurus albolabris. The choice of which antivenom to use is based on physician preference...
December 2, 2016: Hong Kong Medical Journal, Xianggang Yi Xue za Zhi
https://www.readbyqxmd.com/read/27908894/contraction-of-blood-clots-is-impaired-in-acute-ischemic-stroke
#4
Valerie Tutwiler, Alina D Peshkova, Izabella A Andrianova, Dina R Khasanova, John W Weisel, Rustem I Litvinov
OBJECTIVE: Obstructive thrombi or thrombotic emboli are the pathogenic basis of ischemic stroke. In vitro blood clots and in vivo thrombi can undergo platelet-driven contraction (retraction), resulting in volume shrinkage. Clot contraction can potentially reduce vessel occlusion and improve blood flow past emboli or thrombi. The aim of this work was to examine a potential pathogenic role of clot contraction in ischemic stroke. APPROACH AND RESULTS: We used a novel automated method that enabled us to quantify time of initiation and extent and rate of clot contraction in vitro...
December 1, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/27908798/platelets-are-responsible-for-the-accumulation-of-%C3%AE-amyloid-in-blood-clots-inside-and-around-blood-vessels-in-mouse-brain-after-thrombosis
#5
Lilia Y Kucheryavykh, Josué Dávila-Rodríguez, David E Rivera-Aponte, Lidia V Zueva, A Valance Washington, Priscilla Sanabria, Mikhail Y Inyushin
INTRODUCTION: Platelets contain beta-amyloid precursor protein (APP) as well as Aβ peptide (Aβ) that can be released upon activation. During thrombosis, platelets are concentrated in clots and activated. METHODS: We used in vivo fluorescent analysis and electron microscopy in mice to determine to what degree platelets are concentrated in clots. We used immunostaining to visualize Aβ after photothrombosis in mouse brains. RESULTS: Both in vivo results and electron microscopy revealed that platelets were 300-500 times more concentrated in clots than in non-clotted blood...
November 28, 2016: Brain Research Bulletin
https://www.readbyqxmd.com/read/27900590/assessment-of-oxidative-nitrative-modifications-of-plasma-proteins-selected-rotem-parameters-and-kinetics-of-fibrinogen-polymerization-in-patients-with-multiple-myeloma-at-diagnosis
#6
W Nowak, J Treliński, K Chojnowski, J Matczak, M Robak, M Misiewicz, P Nowak
Patients with multiple myeloma (MM) are at increased risk of thrombosis. Growing evidence indicates that oxidative and nitrative modifications of proteins, including fibrinogen, may lead to changes in hemostasis. The study compares samples from patients with MM at diagnosis and healthy volunteers with regard to the oxidative/nitrative modifications of proteins, ROTEM and thrombin-catalyzed fibrin polymerization. The content of carbonyl groups in plasma proteins of patients with MM was significantly higher than in controls (2...
January 2017: Medical Oncology
https://www.readbyqxmd.com/read/27899993/predictive-value-of-microparticle-associated-tissue-factor-activity-for-permeability-glycoprotein-mediated-multidrug-resistance-in-cancer
#7
Antonio Angelini, Sebastiano Miscia, Maria Antonietta Centurione, Roberta Di Pietro, Lucia Centurione
Multidrug resistance (MDR) protein 1, which is also known as permeability glycoprotein (Pgp), and tissue factor (TF) are recurrently overexpressed on the surface of cancer cells, likely in response to stimuli such as chemotherapy. Microparticles (MPs) released from cancer cells into the bloodstream express tumour markers on their surface that may be useful as predictive biomarkers for evaluating disease progression. The present study measured the level of TF/factor VII (FVII)-dependent coagulation of MPs isolated from the plasma of cancer patients with various tumours, who were undergoing chemotherapy...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27899173/procoagulant-role-of-microparticles-in-routine-storage-of-packed-red-blood-cells-potential-risk-for-prothrombotic-post-transfusion-complications
#8
Htet Htet Aung, John-Paul Tung, Melinda M Dean, Robert L Flower, Natalie M Pecheniuk
During routine storage, packed red blood cells (PRBC) undergo biochemical and morphological changes including loss of red blood cell (RBC) membrane asymmetry and release of microparticles (MPs) bearing phosphatidylserine (PS), a procoagulant phospholipid. This study investigated the association between PRBC storage duration, MP profile and procoagulant activity. Leukodepleted PRBC-supernatant (PRBC-SN; n=13) was prepared at weekly intervals throughout storage. Phospholipid-dependent procoagulant activity, assessed using a factor X-activated clotting time (XACT) assay, decreased throughout storage (p<0...
November 26, 2016: Pathology
https://www.readbyqxmd.com/read/27898513/inhibition-of-plasmin-generation-in-plasma-by-heparin-low-molecular-weight-heparin-and-a-covalent-antithrombin-heparin-complex
#9
Gabriela M T Chang, Helen M Atkinson, Leslie R Berry, Anthony K C Chan
The clinical limitations of unfractionated heparin (UFH) and low molecular weight heparin (LMWH) led to the development of an antithrombin-heparin covalent complex (ATH), which displays superior anticoagulant abilities compared with UFH. A recent study investigating its interaction with fibrinolysis showed that ATH inhibited free and fibrin bound plasmin and decreased plasmin generation on fibrin clots. These studies were conducted using purified components and did not elucidate the interaction of ATH with plasmin in the presence of its natural inhibitors α2-antiplasmin (α2-AP) and α2-macroglobulin (α2-M)...
November 24, 2016: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/27895055/role-of-agents-for-reversing-the-effects-of-target-specific-oral-anticoagulants
#10
REVIEW
Tanya R Riley, Mary L Gauthier-Lewis, Chelsea K Sanchez, Janine S Douglas
PURPOSE: The available clinical data on target-specific oral anticoagulant (TSOAC) reversal agents that are currently in development or have been approved by the Food and Drug Administration (FDA) are reviewed. SUMMARY: The development of TSOACs such as dabigatran, rivaroxaban, edoxaban, and apixaban has presented benefits and new challenges. One of the main challenges associated with the use of TSOACs is the lack of suitable agent-specific reversal agents. Several treatment options for the management of life-threatening bleeding events associated with TSOAC use, such as fresh frozen plasma, prothrombin complex concentrates, and recombinant coagulation factor VIIa, have been used, with inconsistent results...
November 28, 2016: American Journal of Health-system Pharmacy: AJHP
https://www.readbyqxmd.com/read/27892731/is-arachidonic-acid-stimulation-really-a-test-for-the-response-to-aspirin-time-to-think-again
#11
Bartosz Olechowski, Alexander Ashby, Mark Mariathas, Vikram Khanna, Michael Mahmoudi, Nick Curzen
Platelets play a key role in pathogenesis of atherothrombosis. Activated platelets initiate thrombus formation. Antiplatelet therapy (APT) modifies these properties. APT involves aspirin. The existence of "aspirin resistance" is reported in many populations with cardiovascular disease. The prevalence of this phenomenon is highly variable, affecting more than 50% of patient subgroups in some papers. Areas covered: This review describes the prevalence of "aspirin resistance", analyses why there is so much apparent variation and addresses whether the commonly used tests of aspirin response are in fact accurately assessing its functional performance...
November 28, 2016: Expert Review of Cardiovascular Therapy
https://www.readbyqxmd.com/read/27891624/quarantine-versus-pathogen-reduced-plasma-coagulation-factor-content-and-rotational-thromboelastometry-coagulation
#12
Oliver M Theusinger, David Goslings, Jan-Dirk Studt, Brigitte Brand-Staufer, Burkhardt Seifert, Donat R Spahn, Beat M Frey
BACKGROUND: Different types of fresh-frozen plasma (FFP) exist, and the concentrations of plasma proteins vary between individuals and blood groups. Furthermore, processing may also influence the content. Quarantine-stored plasma (qFFP) and plasma that was pathogen-reduced using blood-safety (Intercept) technology (piFFP) were analyzed regarding procoagulant and anticoagulant hemostasis proteins, including endogenous thrombin (thrombin-generation) potential (ETP). MATERIALS AND METHODS: Thirty-five samples of each type of FFP were analyzed using only male Blood Group O donors...
November 27, 2016: Transfusion
https://www.readbyqxmd.com/read/27890816/pathophysiology-of-hemophilic-arthropathy-and-potential-targets-for-therapy
#13
REVIEW
Astrid E Pulles, Simon C Mastbergen, Roger E G Schutgens, Floris P J G Lafeber, Lize F D van Vulpen
Hemophilia is a congenital clotting factor deficiency characterized by spontaneous and trauma-related bleeding. Spontaneous bleeding shows a predilection for joints, and repeated hemarthroses lead to a disabling condition called hemophilic arthropathy. Treatment of this condition consists of preventing joint bleeding on the one hand and orthopedic surgery as a last resort on the other. Up till now, there is no disease modifying therapy available to fill the gap between these extremes. This review provides an overview of the pathogenesis of hemophilic arthropathy in order to identify potential targets for therapy...
November 24, 2016: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/27886531/coagulation-and-sepsis
#14
REVIEW
Marcel Levi, Tom van der Poll
Severe sepsis is almost invariably associated with systemic activation of coagulation. There is ample evidence that demonstrates a wide-ranging cross-talk between hemostasis and inflammation, which is probably implicated in the pathogenesis of organ dysfunction in patients with sepsis. Inflammation not only leads to initiation and propagation of coagulation activity, but coagulation also markedly influences inflammation. Molecular mechanisms that play a role in inflammation-induced effects on coagulation have been recognized in much detail...
November 19, 2016: Thrombosis Research
https://www.readbyqxmd.com/read/27886084/intracranial-thrombus-morphology-and-composition-undergoes-time-dependent-changes-in-acute-ischemic-stroke-a-ct-densitometry-study
#15
Slaven Pikija, Jozef Magdic, Vladimir Trkulja, Peter Unterkreuter, Johannes Sebastian Mutzenbach, Helmut F Novak, Friedrich Weymayr, Larissa Hauer, Johann Sellner
The aim of our study was to assess whether cerebral artery clots undergo time-dependent morphological and compositional changes in acute ischemic stroke. We performed a retrospective chart review of patients admitted within 5 h from symptom onset to three European stroke centers and evaluated non-contrast-enhanced CT (NECT) for hyperdense artery signs (HAS) in 2565 scans. The occlusion site, density of HAS expressed in Hounsfield units (HU), area of HAS, and relative density (rHU) (HU clot/HU non-affected artery) were studied and related to time from symptom onset, clinical severity, stroke etiology, and laboratory parameters...
November 23, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27885044/blood-clotting-behavior-is-innately-modulated-in-ursus-americanus-during-early-and-late-denning-relative-to-summer-months
#16
Tinen L Iles, Timothy G Laske, David L Garshelis, Paul A Iaizzo
Remarkably, American black bears (Ursus Americanus) are capable of varying their heart rates to coincide with their breathing, creating pauses of 30 seconds or more, yet they do not appear to suffer from embolic events. We evaluated some features of the clotting cascade of black bears, providing novel insights on the underlying mechanisms they evoke for embolic protection during hibernation.We measured activated clotting times, prothrombin times, and activated partial thromboplastin times during early-denning (December), late-denning (March), and summer (August)...
November 24, 2016: Journal of Experimental Biology
https://www.readbyqxmd.com/read/27876806/a-randomised-controlled-trial-comparing-a-dietary-antiplatelet-the-water-soluble-tomato-extract-fruitflow-with-75%C3%A2-mg-aspirin-in-healthy-subjects
#17
N O'Kennedy, L Crosbie, H-J Song, X Zhang, G Horgan, A K Duttaroy
BACKGROUND/OBJECTIVES: Increasing numbers of food ingredients are gaining acknowledgement, via regulated health claims, of benefits to human health. One such is a water-soluble tomato extract, Fruitflow (FF), a dietary antiplatelet. We examined relative platelet responses to FF and to 75 mg aspirin (ASA) in healthy subjects. SUBJECTS/METHODS: A total of 47 healthy subjects completed a double-blinded randomised controlled trial following a crossover design. Acute and 7-day treatments with 75 mg ASA were compared with control with and without concomitant FF, over a 5-h timecourse...
November 23, 2016: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/27876598/antithrombotic-activity-of-batroxase-a-metalloprotease-from-bothrops-atrox-venom-in-a-model-of-venous-thrombosis
#18
Anna L Jacob-Ferreira, Danilo L Menaldo, Marco A Sartim, Thalita B Riul, Marcelo Dias-Baruffi, Suely V Sampaio
BACKGROUND: Snake venoms are great sources of bioactive molecules, which may be used as models for new drugs. Toxins that interfere in hemostasis have received considerable attention over the years. OBJECTIVES: This study aimed at the evaluation of the antithrombotic activity of Batroxase, a P-I metalloprotease from Bothrops atrox venom, in an animal model of venous thrombosis. METHODS: The antithrombotic activity of Batroxase was tested in vivo in a model based on two factors of the Virchow's Triad: blood flow alterations (partial stenosis of the inferior vena cava), and vessel wall injury (10% ferric chloride for 5min), in comparison with sodium heparin (positive control) and saline (negative control)...
November 19, 2016: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/27874202/defining-pollen-exposure-times-for-clinical-trials-of-allergen-immunotherapy-for-pollen-induced-rhinoconjunctivitis-an-eaaci-position-paper
#19
O Pfaar, K Bastl, U Berger, J Buters, M A Calderon, B Clot, U Darsow, P Demoly, S R Durham, C Galán, R Gehrig, R Gerth van Wijk, L Jacobsen, L Klimek, M Sofiev, M Thibaudon, K C Bergmann
BACKGROUND: Clinical efficacy of pollen allergen immunotherapy has been broadly documented in randomized controlled trials. The underlying clinical endpoints are analysed in seasonal time periods pre-defined on the basis of the background pollen concentration. However, any validated or generally accepted definition from academia or regulatory authorities for this relevant pollen-exposure intensity or period of time (season) is currently not available. Therefore, this Task Force initiative of the European Academy of Allergy and Clinical Immunology (EAACI) aimed to propose definitions based on expert-consensus...
November 22, 2016: Allergy
https://www.readbyqxmd.com/read/27874025/beyond-antibodies-development-of-a-novel-protein-scaffold-based-on-human-chaperonin-10
#20
Abdulkarim M Alsultan, David Y Chin, Christopher B Howard, Christopher J de Bakker, Martina L Jones, Stephen M Mahler
Human Chaperonin 10 (hCpn10) was utilised as a novel scaffold for presenting peptides of therapeutic and diagnostic significance. Molecular dynamic simulations and protein sizing analyses identified a peptide linker (P1) optimal for the formation of the quarternary hCpn10 heptamer structure. hCpn10 scaffold displaying peptides targeting Factor VIIa (CE76-P1) and CD44 (CP7) were expressed in E. coli. Functional studies of CE76-P1 indicated nanomolar affinity for Factor VIIa (3 nM) similar to the E-76 peptide (6 nM), with undetectable binding to Factor X...
November 22, 2016: Scientific Reports
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