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Coagulation Factor Concentrates

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https://www.readbyqxmd.com/read/28632435/relative-effects-of-plasma-fibrinogen-concentrate-and-factor-xiii-on-rotem-coagulation-profiles-in-an-in-vitro-model-of-massive-transfusion-in-trauma
#1
David E Schmidt, Märit Halmin, Agneta Wikman, Anders Östlund, Anna Ågren
Massive traumatic haemorrhage is aggravated through the development of trauma-induced coagulopathy, which is managed by plasma transfusion and/or fibrinogen concentrate administration. It is yet unclear whether these treatments are equally potent in ensuring adequate haemostasis, and whether additional factor XIII (FXIII) administration provides further benefits. In this study, we compared ROTEM whole blood coagulation profiles after experimental massive transfusion with different transfusion regimens in an in vitro model of dilution- and transfusion-related coagulopathy...
June 20, 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/28632184/crude-fucoidan-extracts-impair-angiogenesis-in-models-relevant-for-bone-regeneration-and-osteosarcoma-via-reduction-of-vegf-and-sdf-1
#2
Fanlu Wang, Harald Schmidt, Dijana Pavleska, Thees Wermann, Andreas Seekamp, Sabine Fuchs
The marine origin polysaccharide fucoidan combines multiple biological activities. As demonstrated by various studies in vitro and in vivo, fucoidans show anti-viral, anti-tumor, anti-oxidant, anti-inflammatory and anti-coagulant properties, although the detailed molecular action remains to be elucidated. The aim of the present study is to assess the impact of crude fucoidan extracts, on the formation of vascular structures in co-culture models relevant for bone vascularization during bone repair and for vascularization processes in osteosarcoma...
June 20, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28624906/pathogen-reduction-inactivation-of-products-for-the-treatment-of-bleeding-disorders-what-are-the-processes-and-what-should-we-say-to-patients
#3
Giovanni Di Minno, David Navarro, Carlo Federico Perno, Mariana Canaro, Lutz Gürtler, James W Ironside, Hermann Eichler, Andreas Tiede
Patients with blood disorders (including leukaemia, platelet function disorders and coagulation factor deficiencies) or acute bleeding receive blood-derived products, such as red blood cells, platelet concentrates and plasma-derived products. Although the risk of pathogen contamination of blood products has fallen considerably over the past three decades, contamination is still a topic of concern. In order to counsel patients and obtain informed consent before transfusion, physicians are required to keep up to date with current knowledge on residual risk of pathogen transmission and methods of pathogen removal/inactivation...
June 18, 2017: Annals of Hematology
https://www.readbyqxmd.com/read/28604815/temperature-sensitive-liposomes-combined-with-thermal-ablation-effects-of-duration-and-timing-of-heating-in-mathematical-models-and-in-vivo
#4
Christian Rossmann, M A McCrackin, Kent E Armeson, Dieter Haemmerich
BACKGROUND: Temperature sensitive liposomes (TSL) are nanoparticles that rapidly release the contained drug at hyperthermic temperatures, typically above ~40°C. TSL have been combined with various heating modalities, but there is no consensus on required hyperthermia duration or ideal timing of heating relative to TSL administration. The goal of this study was to determine changes in drug uptake when heating duration and timing are varied when combining TSL with radiofrequency ablation (RF) heating...
2017: PloS One
https://www.readbyqxmd.com/read/28599038/albumin-for-prehospital-fluid-resuscitation-of-hemorrhagic-shock-in-tactical-combat-casualty-care
#5
Nicholas M Studer, Michael D April, F Bowling, Paul D Danielson, Andrew P Cap
Optimal fluid resuscitation on the battlefield in the absence of blood products remains unclear. Contemporary Combat medics are generally limited to hydroxyethyl starch or crystalloid solutions, both of which present significant drawbacks. Obtaining US Food and Drug Administration (FDA)-approved freeze-dried plasma (FDP) is a top casualty care research priority for the US Military. Interest in this agent reflects a desire to simultaneously expand intravascular volume and address coagulopathy. The history of FDP dates to the Second World War, when American expeditionary forces used this agent frequently...
2017: Journal of Special Operations Medicine: a Peer Reviewed Journal for SOF Medical Professionals
https://www.readbyqxmd.com/read/28594458/concizumab-an-anti-tissue-factor-pathway-inhibitor-antibody-induces-increased-thrombin-generation-in-plasma-from-haemophilia-patients-and-healthy-subjects-measured-by-the-thrombin-generation-assay
#6
E K Waters, J Sigh, U Friedrich, I Hilden, B B Sørensen
AIMS: Concizumab, a humanized monoclonal antibody against tissue factor pathway inhibitor (TFPI), is being developed as a subcutaneously (s.c.) administered treatment for haemophilia. It demonstrated a concentration-dependent procoagulant effect in functional TFPI assays; however, global haemostatic assays, such as the thrombin generation assay (TGA), offer a more complete picture of coagulation. We investigated how concizumab affects thrombin generation following ex vivo spiking in plasma from haemophilia patients using the TGA, and if the assay can detect the effect of multiple s...
June 8, 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/28582640/the-causes-of-thrombocytopenia-after-transcatheter-aortic-valve-implantation
#7
Maciej Mitrosz, Remigiusz Kazimierczyk, Bozena Sobkowicz, Ewa Waszkiewicz, Pawel Kralisz, Marek Frank, Jaroslaw Piszcz, Marzenna Galar, Slawomir Dobrzycki, Wlodzimierz J Musial, Tomasz Hirnle, Karol A Kaminski, Agnieszka M Tycinska
INTRODUCTION: Even though thrombocytopenia following transcatheter aortic valve implantation (TAVI) has been described, further investigation of this phenomenon is needed. AIMS: To determine which factors may explain the fall in platelet count that occurs after implantation of a TAVI device, including markers of platelet and blood coagulation activation. MATERIAL AND METHODS: 32 patients without previous indications for dual antiplatelet therapy (mean age 78...
May 26, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28580443/reduced-prothrombinase-inhibition-by-tissue-factor-pathway-inhibitor-contributes-to-the-factor-v-leiden-hypercoagulable-state
#8
Jeremy P Wood, Lisa M Baumann Kreuziger, Paul E R Ellery, Susan A Maroney, Alan E Mast
Activated factor V (FVa) and factor X (FXa) form prothrombinase, which converts prothrombin to thrombin. The α isoform of tissue factor (TF) pathway inhibitor (TFPI) dampens early procoagulant events, partly by interacting with FV. FV Leiden (FVL) is the most common genetic thrombophilia in Caucasians. Thrombosis risk is particularly elevated in women with FVL taking oral contraceptives, which produce acquired TFPIα deficiency. In mice, FVL combined with 50% reduction in TFPI causes severe thrombosis and perinatal lethality...
February 14, 2017: Blood Advances
https://www.readbyqxmd.com/read/28570146/recombinant-c1-esterase-inhibitor-reduces-cytokine-storm-in-an-ex-vivo-whole-blood-model
#9
Vladimir A Bobkov, Roman V Tikhonov, Alexander M Shuster, Dmitry A Poteryaev, Veronika N Bade
C1 esterase inhibitor (C1INH) is an abundant component of blood plasma (the average concentration is 250 mg/L); it is known to be involved in several biological processes, for instance, in the regulation of the coagulation system, adhesion of leukocytes on endothelial cells, and in the regulation of complement and kallikrein cascades. Lately, the role of C1INH in immunomodulation has gained considerable attention. We used an ex vivo whole blood model to examine the influence of C1INH and its mutated variants on the inflammatory cytokines interleukin (IL)-6, tumor necrosis factor-α (TNFα), and IL-1β...
June 1, 2017: Journal of Interferon & Cytokine Research
https://www.readbyqxmd.com/read/28570120/characterization-of-the-coagulation-profile-in-children-with-liver-disease-and-extrahepatic-portal-vein-obstruction-or-shunt
#10
William Beattie, Maria Magnusson, Winita Hardikar, Paul Monagle, Vera Ignjatovic
INTRODUCTION: Chronic liver disease causes a disruption of procoagulant and anticoagulant factors, resulting in a fragile state, prone to increased rates of both bleeding and thrombosis. Currently, there is limited literature describing the changes observed in pediatric liver disease and extrahepatic portal vein obstruction or shunt. This study aimed to describe the changes that occur in children with chronic liver disease and extrahepatic portal vein obstruction or shunt. MATERIALS AND METHODS: We measured the concentration and activity of key procoagulant and anticoagulant factors in children with liver disease, children with extrahepatic portal vein obstruction or shunt, and healthy children...
June 1, 2017: Pediatric Hematology and Oncology
https://www.readbyqxmd.com/read/28561744/synthesis-and-thrombin-factor-xa-and-u46619-inhibitory-effects-of-non-amidino-and-amidino-n%C3%A2-thiophenecarbonyl-and-n%C3%A2-tosylanthranilamides
#11
Soo Hyun Lee, Wonhwa Lee, ThiHa Nguyen, Il Soo Um, Jong-Sup Bae, Eunsook Ma
Thrombin (factor IIa) and factor Xa (FXa) are key enzymes at the junction of the intrinsic and extrinsic coagulation pathways and are the most attractive pharmacological targets for the development of novel anticoagulants. Twenty non-amidino N²-thiophencarbonyl- and N²-tosyl anthranilamides 1-20 and six amidino N²-thiophencarbonyl- and N²-tosylanthranilamides 21-26 were synthesized to evaluate their activated partial thromboplastin time (aPTT) and prothrombin time (PT) using human plasma at a concentration of 30 µg/mL in vitro...
May 31, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28558995/cellular-uptake-of-coagulation-factor-viii-elusive-role-of-the-membrane-binding-spikes-in-the-c1-domain
#12
Lydia Castro-Núñez, Johanna M Koornneef, Mariska G Rondaij, Esther Bloem, Carmen van der Zwaan, Koen Mertens, Alexander B Meijer, Henriet Meems
Low density lipoprotein receptor-related protein 1 (LRP1) is involved in the catabolism of many ligands, including factor VIII (FVIII) and alpha-2-macroglobulin (α2M). Transfer of FVIII to LRP1 is currently believed to be preceded by pre-concentration on the cell surface, by interacting with a so far unidentified component. In the present study, we used confocal microscopy and flow cytometry to compare endocytosis of FVIII and α2M using U87MG cells. The results show that α2M is rapidly internalized and does not compete for LRP1 mediated internalization of FVIII...
May 27, 2017: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/28558427/a-data-driven-approach-for-the-study-of-coagulation-phenomena-in-waste-lubricant-oils-and-its-relevance-in-alkaline-regeneration-treatments
#13
C T Pinheiro, V R Ascensão, M S Reis, M J Quina, L M Gando-Ferreira
Coagulation phenomena can occur in certain types of waste lubricant oils (WLO) during regeneration processes involving alkaline treatments, causing plant shutdowns. In this context, this study addresses the nature of the compounds responsible for the coagulation phenomena after the alkaline treatment. For such, an empirical test was developed to assess the coagulation behaviour of WLO, consisting in the addition of KOH to the WLO followed by heating under stirring conditions. This test was performed on 133 samples and four coagulation classes were identified: A; B1; B2 and C...
December 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28552062/discovery-of-chromen-7-yl-furan-2-carboxylate-as-a-potent-and-selective-factor-xia-inhibitor
#14
Rami Al-Horani, Ahmad J Obaidullah
Direct inhibition of coagulation factor XIa (FXIa) carries a significant promise for developing effective and safe anticoagulants. In this report, we studied 4-methyl-2-oxo-2H-chromen-7-yl furan-2-carboxylate 1, a coumarin derivative, for direct FXIa inhibition. This small molecule was found to inhibit FXIa with an IC50 value of 0.77 μM. Coumarin 1 also displayed a moderate-to-high selectivity for FXIa inhibition over other coagulation, digestive, and fibrinolysis serine proteases. Coumarin 1 selectively doubled APTT of human plasma at a concentration of 72 μM...
May 28, 2017: Cardiovascular & Hematological Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/28550640/endogenous-tissue-factor-pathway-inhibitor-in-vascular-smooth-muscle-cells-inhibits-arterial-thrombosis
#15
Jichun Yang, Kaiyue Jin, Jiajun Xiao, Jing Ma, Duan Ma
Tissue factor pathway inhibitor (TFPI) is the main inhibitor of tissue factor-mediated coagulation. TFPI is expressed by endothelial and smooth muscle cells in the vasculature. Endothelium-derived TFPI has been reported to play a regulatory role in arterial thrombosis. However, the role of endogenous TFPI in vascular smooth muscle cells (VSMCs) in thrombosis and vascular disease development has yet to be elucidated. In this TFPI(Flox) mice crossbred with Sma-Cre mice were utilized to establish TFPI conditional knockout mice and to examine the effects of VSMC-directed TFPI deletion on development, hemostasis, and thrombosis...
May 27, 2017: Frontiers of Medicine
https://www.readbyqxmd.com/read/28542848/change-of-transfusion-and-treatment-paradigm-in-major-trauma-patients
#16
P Stein, A Kaserer, K Sprengel, G A Wanner, B Seifert, O M Theusinger, D R Spahn
Trauma promotes trauma-induced coagulopathy, which requires urgent treatment with fixed-ratio transfusions of red blood cells, fresh frozen plasma and platelet concentrates, or goal-directed administration of coagulation factors based on viscoelastic testing. This retrospective observational study compared two time periods before (2005-2007) and after (2012-2014) the implementation of changes in trauma management protocols which included: use of goal-directed coagulation management; admission of patients to designated trauma centres; whole-body computed tomography scanning on admission; damage control surgery; permissive hypotension; restrictive fluid resuscitation; and administration of tranexamic acid...
May 23, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28537975/reduced-requirement-for-prothrombin-complex-concentrate-for-the-restoration-of-thrombin-generation-in-plasma-from-liver-transplant-recipients
#17
Ezeldeen Abuelkasem, Shaheer Hasan, Michael A Mazzeffi, Raymond M Planinsic, Tetsuro Sakai, Kenichi A Tanaka
BACKGROUND: Plasma transfusion remains the mainstay hemostatic therapy during liver transplantation (LT) in most countries. However, a large volume is required for plasma to achieve clinically relevant factor increases. Prothrombin complex concentrate (PCC) is a low-volume alternative to plasma in warfarin reversal, but its efficacy has not been well studied in LT. METHODS: Blood samples were collected from 28 LT patients at baseline (T0) and 30 minutes after graft reperfusion (T1)...
May 19, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28537561/prediction-of-acute-pancreatitis-in-the-earliest-stages-role-of-biochemical-parameters-and-histopathological-changes
#18
Jacek Baj, Elżbieta Radzikowska, Marcin Maciejewski, Andrzej Dąbrowski, Kamil Torres
For many years, there has been a search for a set of biochemical parameters that could facilitate the assessment of severity, prognosis, and administration of early and appropriate treatment in acute pancreatitis. Administration of treatment within the first 48 hours since admission is associated with many problems of distinguishing patients with a mild form of acute pancreatitis (AP) from those with a severe form of acute pancreatitis. STUDY AIM: To assess the relationship between the extent of change in the concentration of 10 selected biochemical indicators: amylase, lipase, total bilirubin, creatinine, uric acid, aspartate transaminase, alanine transaminase, glucose, magnesium, and iron and histopathological lesions in the pancreas within 2 and 6 hours since induction of AP...
April 30, 2017: Polski Przeglad Chirurgiczny
https://www.readbyqxmd.com/read/28534860/hemophilia-care-in-the-pediatric-age
#19
REVIEW
Marta Bertamino, Francesca Riccardi, Laura Banov, Johanna Svahn, Angelo Claudio Molinari
Hemophilia is the most common of the severe bleeding disorders and if not properly managed since early infancy can lead to chronic disease and lifelong disabilities. However, it enjoys the most efficacious and safe treatment among the most prevalent monogenic disorders. Hemophilia should be considered in the neonatal period in the case of unusual bleeding or in the case of positive family history. Later, hemophilia should be suspected mainly in males because of abnormal bruising/bleeding or unusual bleeding following invasive procedures-for example, tonsillectomy or circumcision...
May 19, 2017: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/28534833/coagulating-colubrids-evolutionary-pathophysiological-and-biodiscovery-implications-of-venom-variations-between-boomslang-dispholidus-typus-and-twig-snake-thelotornis-mossambicanus
#20
Jordan Debono, James Dobson, Nicholas R Casewell, Anthony Romilio, Bin Li, Nyoman Kurniawan, Karine Mardon, Vera Weisbecker, Amanda Nouwens, Hang Fai Kwok, Bryan G Fry
Venoms can deleteriously affect any physiological system reachable by the bloodstream, including directly interfering with the coagulation cascade. Such coagulopathic toxins may be anticoagulants or procoagulants. Snake venoms are unique in their use of procoagulant toxins for predatory purposes. The boomslang (Dispholidus typus) and the twig snakes (Thelotornis species) are iconic African snakes belonging to the family Colubridae. Both species produce strikingly similar lethal procoagulant pathologies. Despite these similarities, antivenom is only produced for treating bites by D...
May 19, 2017: Toxins
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