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Tissue factor, coagulation

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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/28628602/procoagulant-activity-of-human-mesenchymal-stem-cells
#2
Barbara A Christy, Maryanne C Herzig, Robbie K Montgomery, Christopher Delavan, James A Bynum, Kristin M Reddoch, Andrew P Cap
BACKGROUND: Allogeneic mesenchymal stem cells (MSCs) show great potential for the treatment of military and civilian trauma based on their reduced immunogenicity and ability to modulate inflammation and immune function in the recipient. Although generally considered to be safe, MSCs express tissue factor (TF), a potent activator of coagulation. In the current study, we evaluated multiple MSC populations for tissue factor expression and procoagulant activity to characterize safety considerations for systemic use of MSCs in trauma patients who may have altered coagulation homeostasis...
July 2017: Journal of Trauma and Acute Care Surgery
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
#3
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/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
#4
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/28590380/surgical-treatment-for-hemophilic-pseudotumor-twenty-three-cases-with-an-average-follow-up-of-5-years
#5
Jiliang Zhai, Xisheng Weng, Baozhong Zhang, Yong Liu, Peng Gao, Yan-Yan Bian
BACKGROUND: Hemophilic pseudotumor (HPT) is a rare disease with many challenges. Only a few reports on surgical treatment for HPT have been published. METHODS: The cases of 23 patients with HPT who had surgical treatment from July 1996 to December 2014 were retrospectively reviewed. Demographic data, blood loss and transfusion during surgery, outcomes, and complications after surgery were analyzed. RESULTS: Eleven patients underwent HPT resection; 4 underwent HPT excision, allograft transplantation, and absorbable screw fixation; 3 had HPT resection and metallic internal fixation; 2 had HPT resection, autogenous fibular grafting, and absorbable screw fixation; 2 underwent curettage and bone-grafting; and 1 patient received above-the-knee amputation...
June 7, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28587383/mechanism-of-the-protective-effects-of-the-combined-treatment-with-rhynchophylla-total-alkaloids-and-sinapine-thiocyanate-against-a-prothrombotic-state-caused-by-vascular-endothelial-cell-inflammatory-damage
#6
Yunlun Li, Xinya Zhang, Wenqing Yang, Chao Li, Yanjun Chu, Haiqiang Jiang, Zhenzhen Shen
The aim of the present study was to investigate the effect and the underlying mechanism of the combined treatment of rhynchophylla total alkaloids (RTA) and sinapine thiocyanate for protection against a prothrombotic state (PTS) associated with the tumor necrosis factor-alpha (TNF-α)-induced inflammatory injury of vascular endothelial cells (VECs). A TNF-α-induced VEC inflammatory injury model was established, and cell morphology of VECs was evaluated using scanning electron microscopy. In addition, reverse transcription-quantitative polymerase chain reaction and western blot analysis were performed to examine the mRNA and protein expression of coagulation-related factors, including nuclear factor-κB (NF-κB), transforming growth factor-β1 (TGF-β1), tissue factor (TF), plasminogen activator inhibitor (PAI-1), protease-activation receptors (PAR-1) and protein kinase C (PKC-α) in VECs...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28581834/updates-on-smart-polymeric-carrier-systems-for-protein-delivery
#7
Ibrahim El-Sherbiny, Islam Khalil, Isra Ali, Magdi Yacoub
Smart materials are those materials that are responsive to chemical (organic molecules, chemical agents or specific agents), biochemical (protein, enzymes, growth factors, substrates or ligands), physical (electric field, magnetic field, temperature, pH, ionic strength or radiation) or mechanical (pressure or mechanical stress) signals. These responsive materials interact with the stimuli by changing their properties or conformational structures in a predictable manner. Recently, smart polymers have been utilized in various biomedical applications...
June 21, 2017: Drug Development and Industrial Pharmacy
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/28580033/dynamics-of-blood-flow-and-thrombus-formation-in-a-multi-bypass-microfluidic-ladder-network
#9
Jevgenia Zilberman-Rudenko, Joanna L Sylman, Hari H S Lakshmanan, Owen J T McCarty, Jeevan Maddala
The reaction dynamics of a complex mixture of cells and proteins, such as blood, in branched circulatory networks within the human microvasculature or extravascular therapeutic devices such as extracorporeal oxygenation machine (ECMO) remains ill-defined. In this report we utilize a multi-bypass microfluidics ladder network design with dimensions mimicking venules to study patterns of blood platelet aggregation and fibrin formation under complex shear. Complex blood fluid dynamics within multi-bypass networks under flow were modeled using COMSOL...
February 2017: Cellular and Molecular Bioengineering
https://www.readbyqxmd.com/read/28576714/alginate-microbeads-are-coagulation-compatible-while-alginate-microcapsules-activate-coagulation-secondary-to-complement-or-directly-through-fxii
#10
Caroline Gravastrand, Shamal Hamad, Hilde Fure, Bjørg Steinkjer, Liv Ryan, Josè Oberholzer, John D Lambris, Igor Lacík, Tom Eirik Mollnes, Terje Espevik, Ole-Lars Brekke, Anne Mari Rokstad
Alginate microspheres are presently under evaluation for future cell-based therapy. Their ability to induce harmful host reactions needs to be identified for developing the most suitable devices and efficient prevention strategies. We used a lepirudin based human whole blood model to investigate the coagulation potentials of alginate-based microspheres: alginate microbeads (Ca/Ba Beads), alginate poly-l-lysine microcapsules (APA and AP microcapsules) and sodium alginate-sodium cellulose sulfate-poly(methylene-co-cyanoguanidine) microcapsules (PMCG microcapsules)...
May 30, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28571619/elevated-nt-probnp-is-associated-with-unfavorably-altered-plasma-fibrin-clot-properties-in-atrial-fibrillation
#11
Paweł T Matusik, Patrycja S Matusik, Zdzisława Kornacewicz-Jach, Barbara Małecka, Andrzej Ząbek, Anetta Undas
BACKGROUND: Dense fibrin clot formation and hypofibrinolysis have been reported in atrial fibrillation (AF). It is unclear which factors affect fibrin clot properties in AF. METHODS AND RESULTS: We investigated plasma fibrin clot permeability (Ks), clot lysis time (CLT), endogenous thrombin potential (ETP) as well as other coagulation and fibrinolysis parameters along with N-terminal pro-B-type natriuretic peptide (NT-proBNP) in 160 AF patients (median age, 70.5years)...
May 16, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28570958/interplay-between-alternatively-spliced-tissue-factor-and-full-length-tissue-factor-in-modulating-coagulant-activity-of-endothelial-cells
#12
B Ünlü, V Y Bogdanov, H H Versteeg
BACKGROUND: Full length Tissue factor (flTF) is a key player in hemostasis and also likely contributes to venous thromboembolism (VTE), the third most common cardiovascular disease. flTF and its minimally coagulant isoform, alternatively spliced TF (asTF), have been detected in thrombi, suggesting participation of both isoforms in thrombogenesis, but data on participation of asTF in hemostasis is lacking. Therefore, we assessed the role of asTF in flTF cofactor activity modulation, using a co-expression system...
May 25, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28569922/thrombin-is-a-selective-inducer-of-heparanase-release-from-platelets-and-granulocytes-via-protease-activated-receptor-1
#13
Mifleh Tatour, Ma'anit Shapira, Elena Axelman, Shourouk Ghanem, Anat Keren-Politansky, Lilach Bonstein, Benjamin Brenner, Yona Nadir
Heparanase, known to be involved in angiogenesis and metastasis, was shown to form a complex with tissue factor (TF) and to enhance the generation of factor Xa. Platelets and granulocytes contain abundant amounts of heparanase that may enhance the coagulation system upon discharge. It was the aim of this study to identify the inducer and pathway of heparanase release from these cells. Platelets and granulocytes were purified from pooled normal plasma and were incubated with ATP, ADP, epinephrine, collagen, ristocetin, arachidonic acid, serotonin, LPS and thrombin...
June 1, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28569919/elevated-plasma-tfpi-activity-causes-attenuated-tf-dependent-thrombin-generation-in-early-onset-preeclampsia
#14
Karl Egan, Hugh O'Connor, Barry Kevane, Fergal Malone, Aine Lennon, Amani Al Zadjali, Sharon Cooley, Cathy Monteith, Patricia Maguire, Paulina Szklanna, Seamus Allen, Naomi McCallion, Fionnuala Ní Áinle
Early onset preeclampsia (EOP) is a pregnancy-specific proinflammatory disorder that is characterised by competing thrombotic and bleeding risks. It was the aim of this study to characterise thrombin generation, a major determinant of thrombotic and bleeding risk, in order to better understand the haemostatic balance in patients with EOP. Patients with EOP were recruited at the Rotunda Hospital, Dublin. Twenty-six cases of EOP were recruited over a 21-month period, out of 15,299 deliveries at the Rotunda. Blood samples were collected into sodium citrate plus corn trypsin inhibitor anticoagulated vacutainers, platelet-poor plasma was prepared, and calibrated automated thrombography was used to assess thrombin generation...
June 1, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28554592/progresses-in-understanding-trauma-induced-coagulopathy-and-the-underlying-mechanism
#15
REVIEW
Na Peng, Lei Su
Trauma-induced coagulopathy (TIC) is a clinical syndrome caused by imbalance between clotting, anti-coagulation and fibrinolysis resulting from multiple pathological factors such as hemorrhage and tissue injury in the early stage of trauma, and is closely related to the outcome of trauma patients. It is proved in growing evidence that the endogenous coagulation disturbance in trauma itself is the activating factor of TIC, rather than dilution or other acquired coagulopathy. Therefore, a thorough understanding of the molecular mechanisms in the pathogenesis and progression is crucial for effective prevention and treatment in patients with TIC...
May 10, 2017: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
https://www.readbyqxmd.com/read/28552727/disseminated-intravascular-coagulation-caused-by-moojenactivase-a-procoagulant-snake-venom-metalloprotease
#16
Marco A Sartim, Gabriel N Cezarette, Anna L Jacob-Ferreira, Fabiani G Frantz, Lucia H Faccioli, Suely V Sampaio
Snake venom toxins that activate coagulation factors are key players in the process of venom-induced coagulopathy, and account for severe clinical manifestations. The present study applies a variety of biochemical, hematological, and histopathological approaches to broadly investigate the intravascular and systemic effects of moojenactivase (MooA), the first described PIIId subclass metalloprotease isolated from Bothrops sp. venom that activates coagulation factors. MooA induced consumption coagulopathy with high toxic potency, characterized by prolongation of prothrombin and activated partial thromboplastin time, consumption of fibrinogen and the plasma coagulation factors X and II, and thrombocytopenia...
May 25, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28552561/fxii-promotes-proteolytic-processing-of-the-lrp1-ectodomain
#17
Lukasz Wujak, Christina Hesse, Katherina Sewald, Danny Jonigk, Peter Braubach, Gregor Warnecke, Hans-Gerd Fieguth, Armin Braun, Günter Lochnit, Philipp Markart, Liliana Schaefer, Malgorzata Wygrecka
BACKGROUND: Factor XII (FXII) is a serine protease that is involved in activation of the intrinsic blood coagulation, the kallikrein-kinin system and the complement cascade. Although the binding of FXII to the cell surface has been demonstrated, the consequence of this event for proteolytic processing of membrane-anchored proteins has never been described. METHODS: The effect of FXII on the proteolytic processing of the low-density lipoprotein receptor-related protein 1 (LRP1) ectodomain was tested in human primary lung fibroblasts (hLF), alveolar macrophages (hAM) and in human precision cut lung slices (hPCLS)...
August 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28551673/tissue-factor-expression-does-not-predict-mortality-in-breast-cancer-patients
#18
Simon F Stämpfli, Alexander Akhmedov, Silke Hausladen, Zsuzsanna Varga, Konstantin J Dedes, Jens Hellermann, Thomas F Lüscher, Glen Kristiansen, Felix C Tanner, Alexander Breitenstein
BACKGROUND: Tissue factor (TF), the trigger of coagulation, not only initiates thrombus formation, but also elicits tumor growth and invasion in breast cancer. However, the characterization of TF expression in breast cancer tissue and its prognostic value remain unclear. MATERIALS AND METHODS: Three hundred and three primary breast cancer specimens from the local tumor tissue database were immunostained for TF expression and evaluated semiquantitatively. Tumor characteristics (size, grade, nodal status, and ER expression) as well as patient's survival were assessed...
June 2017: Anticancer Research
https://www.readbyqxmd.com/read/28550640/endogenous-tissue-factor-pathway-inhibitor-in-vascular-smooth-muscle-cells-inhibits-arterial-thrombosis
#19
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/28545055/comparative-lytic-efficacy-of-rt-pa-and-ultrasound-in-porcine-versus-human-clots
#20
Shenwen Huang, Himanshu Shekhar, Christy K Holland
INTRODUCTION: Porcine thrombi are employed routinely in preclinical models of ischemic stroke. In this study, we examined the differential lytic susceptibility of porcine and human whole blood clots with and without the use of microbubbles and ultrasound (US) as an adjuvant. MATERIALS AND METHODS: An in vitro system equipped with time-lapse microscopy was used to evaluate recombinant tissue-plasminogen activator (rt-PA) lysis of porcine and human clots in the same species or cross species plasma...
2017: PloS One
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