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Aprotinin

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https://www.readbyqxmd.com/read/28298600/dengue-virus-ns2b-ns3-protease-inhibitors-exploiting-the-prime-side
#1
Kuan-Hung Lin, Akbar Ali, Linah Rusere, Djade I Soumana, Nese Kurt Yilmaz, Celia A Schiffer
The mosquito-transmitted dengue virus (DENV) infects millions of people in tropical and sub-tropical regions. Maturation of DENV particles requires proper cleavage of the viral polyprotein, including processing 8 of the 13 substrate cleavage sites by dengue NS2B-S3 protease. With no available direct-acting antiviral targeting DENV, NS2-S3 protease is a promising target for inhibitor design. Current design efforts focus on the nonprime side of the DENV protease active site, resulting in highly hydrophilic and nonspecific scaffolds...
March 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28263046/seizures-associated-with-tranexamic-acid-for-cardiac-surgery-a-meta-analysis-of-randomized-and-non-randomized-studies
#2
Hisato Takagi, Tomo Ando, Takuya Umemoto
BACKGROUND: We focused whether tranexamic acid (TXA) therapy for adult cardiac surgery is associated with an increase in the risk of seizures and performed a meta-analysis of randomized controlled trials (RCTs) and non-randomized observational studies. METHODS: MEDLINE and EMBASE were searched through December 2016 using PubMed and OVID. Eligible studies were RCTs and non-randomized observational studies of TXA versus control (no TXA, placebo, or active control such as low-dose TXA, aprotinin, and epsilon aminocaproic acid) enrolling adult patients undergoing cardiac surgery and reporting the postoperative incidence of seizures as an outcome...
March 6, 2017: Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/28221207/aprotinin-vs-tranexamic-acid-in-isolated-coronary-artery-bypass-surgery-a-large-multicentre-observational-study
#3
Elsa Deloge, Julien Amour, Sophie Provenchère, Bertrand Rozec, Bruno Scherrer, Alexandre Ouattara
BACKGROUND: Aprotinin appears to be more efficacious than lysine analogues to reduce bleeding and transfusion of blood products in high-transfusion-risk cardiac surgical patients. However, in isolated coronary artery bypass graft (CABG) surgery, the results from head-to-head trials remain less conclusive. OBJECTIVE: Our objective was to compare the efficacies and safety of aprotinin and tranexamic acid (TXA) in patients undergoing isolated on-pump CABG. DESIGN: A large multicentre before-and-after study pooling individual data from published trials and unpublished data from three other databases...
February 17, 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/28215980/a-special-article-following-the-relicence-of-aprotinin-injection-in-europe
#4
David Royston, Stefan De Hert, Jan van der Linden, Alexandre Ouattara, Kai Zacharowski
No abstract text is available yet for this article.
February 13, 2017: Anaesthesia, Critical Care & Pain Medicine
https://www.readbyqxmd.com/read/28166379/reference-values-for-rotational-thromboelastometry-rotem-in-clinically-healthy-cats
#5
Charlotte Marly-Voquer, Barbara Riond, Rahel Jud Schefer, Annette P N Kutter
OBJECTIVE: To establish reference intervals for rotational thromboelastometry (ROTEM) using feline blood. DESIGN: Prospective study. SETTING: University teaching hospital. ANIMALS: Twenty-three clinically healthy cats between 1 and 15 years. INTERVENTION: For each cat, whole blood was collected via jugular or medial saphenous venipuncture, and blood was placed into a serum tube, a tube containing potassium-EDTA, and tubes containing 3...
March 2017: Journal of Veterinary Emergency and Critical Care
https://www.readbyqxmd.com/read/28135202/using-a-radial-diffusion-method-to-investigate-the-role-of-plasmin-degradation-of-fibrin-in-a-physical-model-of-an-early-phase-wound
#6
Chima P Chukwuemeka, Jann Cupp, Jonathan R Sanders
BACKGROUND: Fibrin clot formation, which acts to stabilize a wound following injury, is among the key early aspects of dermal wound healing. This preliminary matrix is eventually degraded via a process known as fibrinolysis and replaced with a collagen-rich matrix that continues to be remodeled to minimize scarring. Disruptions in these carefully coordinated events lead to certain undesirable conditions such as fibrosis and the formation of abnormal scars that are associated with excess amounts of collagen...
January 23, 2017: Wounds: a Compendium of Clinical Research and Practice
https://www.readbyqxmd.com/read/28133791/the-effect-of-different-protease-inhibitors-on-stability-of-parathyroid-hormone-insulin-and-prolactin-levels-under-different-lag-times-and-storage-conditions-until-analysis
#7
Ozgur Baykan, Ali Yaman, Fethullah Gerin, Onder Sirikci, Goncagul Haklar
INTRODUCTION: Proteolytic cleavage through proteases affects peptide hormone levels, which is of particular significance when the time interval between sampling and analysis is prolonged. We evaluated the stability of parathyroid hormone, insulin, and prolactin molecules (i) with different protease inhibitors such as K2 EDTA, aprotinin, and protease inhibitor cocktail (PIC), (ii) with different lag times (6-72 hours), and (iii) under different storage temperatures (4°C vs room temperature [RT]) until analysis...
January 30, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28125808/coagulation-management-in-jersey-calves-an-ex-vivo-study
#8
Sabine Gröning, Judith Maas, Svenja van Geul, Rolf Rossaint, Ulrich Steinseifer, Oliver Grottke
OBJECTIVE: Jersey calves are frequently used as an experimental animal model for in vivo testing of cardiac assist devices or orthopedic implants. In this ex vivo study, we analyzed the coagulation system of the Jersey calves and the potential of human-based coagulation management to circumvent perioperative bleeding complications during surgery. Experimental Procedure: Blood from 7 Jersey calves was subjected to standard laboratory tests and thromboelastometry analysis. An ex vivo model of dilutional coagulopathy was used to study the effects of fibrinogen or prothrombin complex concentrate supplementation...
January 27, 2017: European Surgical Research. Europäische Chirurgische Forschung. Recherches Chirurgicales Européennes
https://www.readbyqxmd.com/read/28070896/tiny-protein-detection-using-pressure-through-solid-state-nanopores
#9
Ji Li, Rui Hu, Xiaoqing Li, Xin Tong, Dapeng Yu, Qing Zhao
Solid-state nanopore is a promising tool to detect proteins and its complexes. Small proteins (sub-35 kDa) translocate very fast which could not be detected by normal patch-clamp recording instrument due to low temporal resolution. We first introduce pressure into protein study and detection. The pressure-derived force, combined with the voltage bias, makes very tiny protein (MW < 6.5 kDa) detection possible. Capture rate for Aprotinin is enhanced five times more than that in traditional voltage-driven method by fine tuning of pressure and voltage...
January 9, 2017: Electrophoresis
https://www.readbyqxmd.com/read/27995367/paracoccidioides-brasiliensis-induces-cytokine-secretion-in-epithelial-cells-in-a-protease-activated-receptor-dependent-par-manner
#10
Priscila de Oliveira, Maria Aparecida Juliano, Aparecida Sadae Tanaka, Adriana Karaoglanovic Carmona, Saara Maria Batista Dos Santos, Bianca Carla Silva Campitelli de Barros, Paloma Korehisa Maza, Rosana Puccia, Erika Suzuki
Paracoccidioides brasiliensis is one of the etiological agents of the human systemic mycosis paracoccidioidomycosis. Protease-activated receptors (PARs) are expressed in many cell types and comprise a family of G protein-coupled receptors (PAR-1, PAR-2, and PAR-4), which may be activated by proteases secreted by several pathogens. In the present study, we showed that the pathogenic fungus P. brasiliensis secretes components that promote interleukin (IL)-6 and IL-8 secretion by the lung epithelial cell line A549...
December 19, 2016: Medical Microbiology and Immunology
https://www.readbyqxmd.com/read/27921033/new-tools-to-study-contact-activation
#11
Steffen Rosén
The recent availability of a sensitive chromogenic method approach for determination of FXIa activity has been explored for designing sensitive methods for FXIIa and kallikrein, both using FXa formation as the read-out. For both enzymes the assay range 1-10 nmol/L provides a resolution of about 0.8 absorbance units with a total assay time of about 20 min. For studies on activation kinetics, subsampling and extensive dilution can be performed in MES-bovine serum albumin (BSA) buffer pH 5.7 for quenching of enzyme activity and with ensuing determination of FXa generation in a chromogenic FXIa method...
2016: Frontiers in Medicine
https://www.readbyqxmd.com/read/27895370/lower-red-cell-transfusion-rates-with-use-of-tranexamic-acid-in-single-stage-bilateral-total-knee-arthroplasty-a-retrospective-audit
#12
Muhammad Aziz, Salman Bin Mahmood, Riaz Hussain Lakdawala, Tashfeen Ahmad
Bilateral total knee arthroplasty (BTKA) patients may require blood transfusion which has its risks. Anti-fibrinolytic drugs such as aprotinin, aminocaproic acid and tranexamic acid (TXA) have reduced transfusion requirements in major surgery. This retrospective audit was performed to assess effectiveness of TXA in reducing blood transfusion rate in single-stage sequential BTKA cases operated by a single surgeon. Records of 91 patients given TXA and 80 controls who were operated before 2012 and not given TXA were reviewed...
October 2016: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/27797450/s2-subsite-variations-between-human-and-mouse-enzymes-plasmin-factor-xia-kallikrein-elucidate-inhibition-differences-by-tissue-factor-pathway-inhibitor-2-domain1-wild-type-leu17arg-mutant-and-aprotinin
#13
K Vadivel, Y Kumar, G I Ogueli, S M Ponnuraj, P Wongkongkathep, J A Loo, M S Bajaj, S P Bajaj
Essentials Current antifibrinolytics - aminocaproic acid and tranexamic acid-can cause seizures or renal injury. KD1L17R -KT , aprotinin and tranexamic acid were tested in a modified mouse tail-amputation model. S2'-subsite variations between human and mouse factor XIa result in vastly different inhibition profiles. KD1L17R -KT reduces blood loss and D-dimer levels in mouse with unobserved seizures or renal injury. SUMMARY: Background Using tissue factor pathway inhibitor (TFPI)-2 Kunitz domain1 (KD1), we obtained a bifunctional antifibrinolytic molecule (KD1L17R -KT ) with C-terminal lysine (kringle domain binding) and P2'-residue arginine (improved specificity towards plasmin)...
December 2016: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/27772757/recombinant-tissue-plasminogen-activator-enhances-microparticle-release-from-mouse-brain-derived-endothelial-cells-through-plasmin
#14
Marie Garraud, Kahina Khacef, Anne-Clémence Vion, Claire Leconte, Min Yin, Jean-Marie Renard, Catherine Marchand-Leroux, Chantal M Boulanger, Isabelle Margaill, Virginie Beray-Berthat
Thrombolysis with recombinant tissue plasminogen activator (rt-PA) is currently the only approved pharmacological strategy for acute ischemic stroke. However, rt-PA exhibits vascular toxicity mainly due to endothelial damage. To investigate the mechanisms underlying rt-PA-induced endothelial alterations, we assessed the role of rt-PA in the generation of endothelial microparticles (EMPs), emerging biological markers and effectors of endothelial dysfunction. The mouse brain-derived endothelial cell line bEnd...
November 15, 2016: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/27749350/spine-surgery-and-blood-loss-systematic-review-of-clinical-evidence
#15
Dafna Willner, Valeria Spennati, Shelly Stohl, Giulia Tosti, Simone Aloisio, Federico Bilotta
Spine surgery has been growing rapidly as a neurosurgical operation, with an increase of 220% over a 15-year period. Intraoperative blood transfusion is a major outcome determinant of spine procedures. Various approaches, including pharmacologic and nonpharmacologic therapies, have been tested to decrease both intraoperative and postoperative blood loss. The aim of this systematic review is to report clinical evidence on the relationship between intraoperative blood loss (primary outcome) and on transfusion requirements and postoperative complications (secondary outcomes) in patients undergoing spine surgery...
November 2016: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/27705885/the-preanalytical-stability-of-glucagon-as-measured-by-liquid-chromatography-tandem-mass-spectrometry-and-two-commercially-available-immunoassays
#16
Jaimini Cegla, Ben J Jones, James Howard, Richard Kay, Colin S Creaser, Stephen R Bloom, Tricia M Tan
BACKGROUND: One of the main challenges in the measurement of glucagon is the premise that it is unstable in human plasma. Traditionally, protease inhibitors have been used to prevent its degradation; however, their use is controversial. Here, we investigated the optimal method of sample collection for glucagon, with measurement by liquid chromatography tandem mass spectrometry (LC-MS/MS) and two commercially available immunoassays. METHODS: Blood from healthy fasting volunteers (n = 10) was processed under a variety of preanalytical conditions including collection in EDTA vs...
October 4, 2016: Annals of Clinical Biochemistry
https://www.readbyqxmd.com/read/27704740/correlation-of-glypican-4-level-with-basal-active-glucagon-like-peptide-1-level-in-patients-with-type-2-diabetes-mellitus
#17
Sang Ah Lee, Gwanpyo Koh, Suk Ju Cho, So Yeon Yoo, Sang Ouk Chin
BACKGROUND: Previous studies have reported that glypican-4 (GPC4) regulates insulin signaling by interacting with insulin receptor and through adipocyte differentiation. However, GPC4 has not been studied with regard to its effects on clinical factors in patients with type 2 diabetes mellitus (T2DM). We aimed to identify factors associated with GPC4 level in T2DM. METHODS: Between January 2010 and December 2013, we selected 152 subjects with T2DM and collected serum and plasma into tubes pretreated with aprotinin and dipeptidyl peptidase-4 inhibitor to preserve active gastric inhibitory polypeptide (GIP) and glucagon-like peptide 1 (GLP-1)...
September 2016: Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27693206/randomized-evidence-for-reduction-of-perioperative-mortality-an-updated-consensus-process
#18
Giovanni Landoni, Antonio Pisano, Vladimir Lomivorotov, Gabriele Alvaro, Ludhmila Hajjar, Gianluca Paternoster, Caetano Nigro Neto, Nicola Latronico, Evgeny Fominskiy, Laura Pasin, Gabriele Finco, Rosetta Lobreglio, Maria Luisa Azzolini, Giuseppe Buscaglia, Alberto Castella, Marco Comis, Adele Conte, Massimiliano Conte, Francesco Corradi, Erika Dal Checco, Giovanni De Vuono, Marco Ganzaroli, Eugenio Garofalo, Gordana Gazivoda, Rosalba Lembo, Daniele Marianello, Martina Baiardo Redaelli, Fabrizio Monaco, Valentina Tarzia, Marta Mucchetti, Alessandro Belletti, Paolo Mura, Mario Musu, Giovanni Pala, Massimiliano Paltenghi, Vadim Pasyuga, Desiderio Piras, Claudio Riefolo, Agostino Roasio, Laura Ruggeri, Francesco Santini, Andrea Székely, Luigi Verniero, Antonella Vezzani, Alberto Zangrillo, Rinaldo Bellomo
OBJECTIVE: Of the 230 million patients undergoing major surgical procedures every year, more than 1 million will die within 30 days. Thus, any nonsurgical interventions that help reduce perioperative mortality might save thousands of lives. The authors have updated a previous consensus process to identify all the nonsurgical interventions, supported by randomized evidence, that may help reduce perioperative mortality. DESIGN AND SETTING: A web-based international consensus conference...
August 2, 2016: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/27677178/plasmin-a-modulator-of-immune-function
#19
Dominik F Draxler, Maithili Sashindranath, Robert L Medcalf
Plasmin is the effector protease of the fibrinolytic system, well known for its involvement in fibrin degradation and clot removal. However, plasmin is also recognized as a potent modulator of immunological processes by directly interacting with various cell types including leukocytes (monocytes, macrophages, and dendritic cells) and cells of the vasculature (endothelial cells, smooth muscle cells) as well as soluble factors of the immune system and components of the extracellular matrix. In fact, the removal of misfolded proteins and maintenance of tissue homeostasis seem to be major physiological functions of plasmin...
March 2017: Seminars in Thrombosis and Hemostasis
https://www.readbyqxmd.com/read/27671279/efficacy-of-antifibrinolytic-agents-on-surgical-bleeding-and-transfusion-requirements-in-spine-surgery-a-meta-analysis
#20
REVIEW
Guang Li, Tian-Wei Sun, Gan Luo, Chao Zhang
PURPOSE: Spine surgery is usually associated with large amount of blood loss and blood transfusion. Excessive blood loss may cause hypotension, inadequate oxygenation of organs, necessitate allogeneic blood transfusion, and spinal epidural hematoma formation. Aprotinin, TXA, and EACA are antifibrinolytics currently offered as prophylactic agents to reduce surgery-associated blood loss. The purpose of this study was to assess the efficacy of using antifibrinolytic agents in reducing blood loss and blood transfusions in spine surgery...
January 2017: European Spine Journal
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