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https://www.readbyqxmd.com/read/29049684/coagulation-profile-in-open-and-video-assisted-thoracoscopic-lobectomies-a-cohort-study
#1
Thomas Decker Christensen, Henrik Vad, Søren Pedersen, Peter B Licht, Mads Nybo, Kåre Hornbech, Nora Elisabeth Zois, Anne-Mette Hvas
OBJECTIVES: Lung cancer patients are perceived to have a relatively high risk of venous thromboembolic events due to an activation of the coagulation system. In terms of activation of the coagulation system, the difference between video-assisted thoracoscopic surgery (VATS) and open lobectomies for primary lung cancer has not been investigated. The aim of this study was to compare the impact on the coagulation system in patients undergoing curative surgery for primary lung cancer by either VATS or open lobectomies...
October 16, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29040837/grape-intake-reduces-thrombin-generation-and-enhances-plasma-fibrinolysis-potential-role-of-circulating-procoagulant-microparticles
#2
Concetta T Ammollo, Fabrizio Semeraro, Rosa Anna Milella, Donato Antonacci, Nicola Semeraro, Mario Colucci
Phytochemicals contained in grapes down-regulate several prothrombotic pathways in vitro. We evaluated the effect of grape consumption on coagulation and fibrinolysis in healthy volunteers. Thirty subjects were enrolled: 20 were given grape (5 g/kg body weight/day for 3 weeks), while 10 served as controls. Blood samples were taken at baseline (T0), at the end of the grape diet (T1) and after 4-week wash-out (T2). Grape intake caused a significant decrease of the procoagulant and inflammatory responses of whole blood and/or mononuclear cells to bacterial lipopolysaccharide at both T1 and T2...
September 1, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29035738/thrombin-activatable-fluorescent-peptide-incorporated-gold-nanoparticles-for-dual-optical-computed-tomography-thrombus-imaging
#3
Sung-Pil Kwon, Sangmin Jeon, Sung-Hoon Lee, Hong Yeol Yoon, Ju Hee Ryu, Dayil Choi, Jeong-Yeon Kim, Jiwon Kim, Jae Hyung Park, Dong-Eog Kim, Ick Chan Kwon, Kwangmeyung Kim, Cheol-Hee Ahn
Thrombosis is an important pathophysiologic phenomenon in various cardiovascular diseases, which can lead to oxygen deprivation and infarction of tissues by generation of a thrombus. Thus, direct thrombus imaging can provide beneficial in diagnosis and therapy of thrombosis. Herein, we developed thrombin-activatable fluorescent peptide (TAP) incorporated silica-coated gold nanoparticles (TAP-SiO2@AuNPs) for direct imaging of thrombus by dual near-infrared fluorescence (NIRF) and micro-computed tomography (micro-CT) imaging, wherein TAP molecules were used as targeted thrombin-activatable peptide probes for thrombin-specific NIRF imaging...
October 9, 2017: Biomaterials
https://www.readbyqxmd.com/read/29032977/analysis-of-factor-xia-factor-ixa-and-tissue-factor-activity-in-burn-patients
#4
Jeffrey W Shupp, Shannon M Prior, Daniel Y Jo, Lauren T Moffatt, Kenneth G Mann, Saulius Butenas
INTRODUCTION: An elevated procoagulant activity observed in trauma patients is, in part, related to tissue factor (TF) located on blood cells and microparticles. However, analysis of trauma patient plasma indicates that there are other contributor(s) to the procoagulant activity. We hypothesize that factor (F)XIa and FIXa are responsible for an additional procoagulant activity in burn patients. METHODS: Multiple time-point plasma samples from 56 burn patients (total number of samples was 471; up to 20 time-points/patient collected in 3 weeks following admission) were evaluated in a thrombin generation assay using inhibitory antibodies to TF, FIXa and FXIa...
October 9, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/29032523/thrombin-generation-test-as-a-marker-for-high-risk-venous-thrombosis-pregnancies
#5
Bérangère S Joly, Bénédicte Sudrié-Arnaud, Virginie Barbay, Jeanne-Yvonne Borg, Véronique Le Cam Duchez
Pregnancy is a well-established risk factor for venous thromboembolism and is associated with a state of hypercoagulability. The use of sensitive and specific biological markers to predict risk factors for thrombosis is essential during pregnancy. Our objective was to investigate the usefulness of thrombin generation test (TGT) as a marker to predict the risk of thrombosis in high risk venous thrombosis (HRVT) pregnancies compared to normal pregnancies. This retrospective study enrolled 134 women with HRVT pregnancies, 78 of whom had monozygotic, spontaneous and untreated pregnancies and formed the study group...
October 14, 2017: Journal of Thrombosis and Thrombolysis
https://www.readbyqxmd.com/read/29030565/proteolytic-signatures-define-unique-thrombin-derived-peptides-present-in-human-wound-fluid-in-vivo
#6
Rathi Saravanan, Sunil S Adav, Yeu Khai Choong, Mariena J A van der Plas, Jitka Petrlova, Sven Kjellström, Siu Kwan Sze, Artur Schmidtchen
The disease burden of failing skin repair and non-healing ulcers is extensive. There is an unmet need for new diagnostic approaches to better predict healing activity and wound infection. Uncontrolled and excessive protease activity, of endogenous or bacterial origin, has been described as a major contributor to wound healing impairments. Proteolytic peptide patterns could therefore correlate and "report" healing activity and infection. This work describes a proof of principle delineating a strategy by which peptides from a selected protein, human thrombin, are detected and attributed to proteolytic actions...
October 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29027774/rational-approach-to-transfusion-in-liver-transplantation
#7
Fuat H Saner, Lasitha Abeysundara, Matthias Hartmann, Susan V Mallett
For over 50 years patients with liver cirrhosis were considered to be at markedly increased risk of bleeding. This dogma was seemingly supported by abnormalities in standard laboratory tests (SLTs), such as the prothrombin time, that were interpreted as indicating a bleeding diathesis. However, publications from the last decade have revealed SLTs to be poor predictors of bleeding and it is now understood that stable patients with cirrhosis have a rebalanced haemostatic system and preserved thrombin generation...
October 12, 2017: Minerva Anestesiologica
https://www.readbyqxmd.com/read/29024684/duplex-quadruplex-oligonucleotides-role-of-the-duplex-domain-in-the-stabilization-of-a-new-generation-of-highly-effective-anti-thrombin-aptamers
#8
Irene Russo Krauss, Valeria Napolitano, Luigi Petraccone, Romualdo Troisi, Vera Spiridonova, Carlo Andrea Mattia, Filomena Sica
Recently, mixed duplex/quadruplex oligonucleotides have attracted great interest for use as biomedical aptamers. In the case of anti-thrombin aptamers, the addition of duplex-forming sequences to a G-quadruplex module identical or very similar to the best-known G-quadruplex of the Thrombin Binding Aptamer (HD1) results in new or improved biological properties, such as higher activity or different recognition properties with respect to HD1. Remarkably, this bimodular fold was hypothesized, based on its sequence, for the only anti-thrombin aptamer in advanced clinical trial, NU172...
October 9, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29022492/platelet-aggregation-impacts-thrombin-generation-assessed-by-calibrated-automated-thrombography
#9
Mélusine Didelot, Clémence Docq, Denis Wahl, Patrick Lacolley, Véronique Regnault, Jérémy Lagrange
A calibrated automated thrombogram (CAT) is performed usually with human platelet-free plasma (PFP) but may be more relevant with platelet-rich plasma (PRP). In this case, platelets are not stimulated by subendothelial molecules like collagen. Our aim was to assess the consequence of strong (collagen) or weak (ADP) induction of platelet release and aggregation on thrombin generation. Platelet aggregation in PRP was triggered with 10 µg/mL collagen or 10 µM ADP using a lumi-aggregometer. Thrombin generation curves were monitored by CAT in different conditions: PRP, PRP with activated platelets (actPRP), aggregated PRP (agPRP), aggregated platelets resuspended in autologous PFP (resPRP), PFP and PFP obtained after aggregation (agPFP)...
October 12, 2017: Platelets
https://www.readbyqxmd.com/read/29021229/in-vivo-generated-thrombin-and-plasmin-do-not-activate-the-complement-system-in-baboons
#10
Ravi S Keshari, Robert Silasi, Cristina Lupu, Fletcher B Taylor, Florea Lupu
Sepsis concurrently activate both coagulation and complement systems. While complement activation by bacteria is well-documented, work in mice and in vitro suggests that coagulation proteases can directly cleave complement proteins. We aimed to determine if generation of coagulation proteases in vivo can activate the complement cascade in two highly coagulopathic models. We compared temporal changes in activation biomarkers of coagulation (thrombin-antithrombin, TAT), fibrinolysis (plasmin-antiplasmin, PAP) and complement (C3b, C5a, C5b-9) in baboons infused with factor Xa and phospholipids (FXa/PCPS) vs...
October 11, 2017: Blood
https://www.readbyqxmd.com/read/29020675/increased-platelet-monocyte-interaction-in-stable-copd-in-the-absence-of-platelet-hyper-reactivity
#11
Floor E Aleva, Godfrey Temba, Quirijn de Mast, Sami O Simons, Philip G de Groot, Yvonne F Heijdra, André J A M van der Ven
BACKGROUND: Chronic obstructive pulmonary disease (COPD) is well known for its cardiovascular co-morbidities. Increased platelet-monocyte interaction is found in COPD and may reflect altered platelet function and a potential role for anti-platelet therapy. OBJECTIVES: The objectives were to investigate platelet-monocyte interaction, platelet activation and reactivity and plasmatic coagulation in stable COPD. METHODS: Platelet-monocyte interaction and platelet activation were determined by flow cytometry in 30 stable COPD patients and 25 controls...
October 12, 2017: Respiration; International Review of Thoracic Diseases
https://www.readbyqxmd.com/read/28993777/the-procoagulant-activity-of-apoptotic-cells-is-mediated-by-interaction-with-factor-xii
#12
Aizhen Yang, Fengwu Chen, Chao He, Junsong Zhou, Yi Lu, Jihong Dai, Raymond B Birge, Yi Wu
Apoptotic cells, by externalizing phosphatidylserine (PS) as a hallmark feature, are procoagulant. However, the mechanism by which apoptotic cells activate coagulation system remains unknown. Intrinsic coagulation pathway is initiated by coagulation factor XII (FXII) of contact activation system. The purpose of this study was to determine whether FXII is involved in procoagulant activity of apoptotic cells. Using western blotting and chromogenic substrate assay, we found that incubation with apoptotic cells, but not with viable cells, resulted in rapid cleavage and activation of FXII in the presence of prekallikrein and high molecular weight kininogen (HK), other two components of contact activation system...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28991281/trombosis-venosa-espl%C3%A3-cnica-como-manifestaci%C3%A3-n-inicial-de-mielofibrosis-primaria
#13
Gregorio Campos-Cabrera, Virginia Campos-Cabrera, Salvador Campos-Cabrera, José-Luis Campos-Villagómez, Alejandra Romero-González
other: Las neoplasias mieloproliferativas (NMP) son alteraciones crónicas de las células madre hematopoyéticas clonales caracterizadas por una mayor producción de granulocitos, glóbulos rojos o plaquetas. Una de las principales complicaciones de las NMP es la aparición de problemas trombóticos venosos y arteriales causados por un aumento en la agregación plaquetaria y la generación de trombina. Se evaluaron 11 casos de mielofibrosis primaria (MP), de los cuales dos debutaron con trombosis venosa esplácnica (TVE)...
2017: Revista de Investigación Clínica; Organo del Hospital de Enfermedades de la Nutrición
https://www.readbyqxmd.com/read/28984010/safety-and-dose-dependency-of-eptacog-beta-activated-in-a-dose-escalation-study-of-non-bleeding-congenital-haemophilia-a-or-b-patients-with-or-without-inhibitors
#14
J Ducore, J B Lawrence, M Simpson, L Boggio, A Bellon, J Burggraaf, J Stevens, M Moerland, J Frieling, J Reijers, M Wang
INTRODUCTION: Varying initial doses of activated eptacog beta (recombinant human FVIIa, rhFVIIa) may provide therapeutic options when treating bleeding in patients with congenital haemophilia who have developed inhibitory antibodies to factor VIII (FVIII) or factor IX (FIX). This study evaluated escalated doses of a new rhFVIIa product as a prelude to selecting the doses for clinical efficacy evaluation in haemophilia patients. AIM: To assess the safety, pharmacokinetics, and laboratory pharmacodynamics of 3 doses of rhFVIIa in non-bleeding patients with congenital haemophilia A or B with or without inhibitors...
October 5, 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/28981954/differential-effect-of-the-ultra-low-dose-and-standard-estrogen-plus-dydrogesterone-therapy-on-thrombin-generation-and-fibrinolysis-in-postmenopausal-women
#15
Magdalena Piróg, Robert Jach, Olga Kacalska-Janssen
INTRODUCTION: The objective was to estimate the effects of different doses of oral hormone therapy (HT) on thrombin generation and fibrinolytic activity in postmenopausal women after 12-months treatment. MATERIAL AND METHODS: Thrombin generation, fibrinolysis activators and inhibitors were determined before, and after 12-months treatment. Participants (180) were assigned (1:1:1) as follows: 1) standard HT group, 17β-estradiol (1 mg/d) with dydrogesterone (5 mg/d); 2) ultra-low-dose HT group, 17β-estradiol (0...
October 5, 2017: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/28981200/soluble-fibrin-causes-an-acquired-platelet-glycoprotein-vi-signaling-defect-implications-for-coagulopathy
#16
Mei Yan Lee, Christopher C Verni, Bradley A Herbig, Scott L Diamond
BACKGROUND: In coagulopathic blood, circulating thrombin may drive platelet dysfunction. METHODS/RESULTS: Using calcium dye-loaded platelets, the effect of thrombin exposure and soluble fibrin generation on subsequent platelet GPVI function was investigated. Exposure of apixaban-treated platelet-rich plasma (12% PRP) to thrombin (1-10 nM), but not ADP or thromboxane mimetic U46619 exposure, dramatically blocked subsequent GPVI activation by convulxin, collagen-related peptide, or fibrillar collagen...
October 5, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28981184/soluble-fibrin-going-for-six
#17
Samantha J Montague
Coagulopathy commonly arises in patients following traumatic injury and is a major clinical burden [1]. Trauma-induced coagulopathy (TIC) is a multi-factorial condition associated with increased thrombin generation, coagulation factor consumption and activation of fibrinolytic pathways, leading to increased generation of plasmin, fibrin and fibrin degradation products, including D-dimers [1-3]. TIC also affects platelet function, where trauma patients can present with a hypofunctional platelet phenotype even with normal platelet count, which predicts mortality and poor patient outcome [4-7]...
October 5, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28980454/incidence-risk-factors-and-outcomes-of-central-venous-catheter-related-thromboembolism-in-breast-cancer-patients-the-caveccas-study
#18
Philippe Debourdeau, Marc Espié, Sylvie Chevret, Joseph Gligorov, Antoine Elias, Pierre François Dupré, Kristell Desseaux, Issa Kalidi, Stephane Villiers, Sylvie Giachetti, Corinne Frere, Dominique Farge
Previous epidemiologic studies investigating central venous catheter (CVC)-related venous thromboembolism (CRT) were conducted in heterogenous cancer populations and data in breast cancer (BC) remain limited. To investigate the Doppler ultrasound (DUS)-CRT incidence, risk factors and outcomes in BC, we designed a prospective, multicenter cohort of nonmetastatic invasive BC patients undergoing insertion of a CVC for chemotherapy. All patients underwent double-blind DUS before, 7, 30, and 90 days after CVC insertion and a 6 months clinical follow-up...
October 4, 2017: Cancer Medicine
https://www.readbyqxmd.com/read/28970801/polyphosphate-in-neonates-less-shedding-from-platelets-and-divergent-prothrombotic-capacity-due-to-lower-tfpi-levels
#19
Axel Schlagenhauf, Harald Haidl, Sina Pohl, Eva-Christine Weiss, Bettina Leschnik, Siegfried Gallistl, Wolfgang Muntean
Background: The neonatal hemostatic system exhibits a fragile balance featuring lower levels of clotting factors as well as inhibitors. Neonatal platelets show in-vitro hypoaggregability, but neonates exhibit well-functioning primary and secondary hemostasis despite this impairment. Recently, polyphosphate shed by activated platelets has been shown to induce a prothrombotic shift on the plasmatic coagulation system of adults. The impact of platelet derived polyphosphate might differ in neonates due to aforementioned peculiarities...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28969597/the-effect-of-regional-citrate-anti-coagulation-on-the-coagulation-system-in-critically-ill-patients-receiving-continuous-renal-replacement-therapy-for-acute-kidney-injury-an-observational-cohort-study
#20
Richard Fisher, Katie Lei, Mike J Mitchell, Gary W Moore, Helen Dickie, Linda Tovey, Siobhan Crichton, Marlies Ostermann
BACKGROUND: Regional anticoagulation with citrate is the recommended first line treatment for patients receiving continuous renal replacement therapy (CRRT). There is wide variability in filter patency which may be due to differences in patient characteristics and local practice. It is also possible that citrate has effects on primary and secondary haemostasis, fibrinolysis and platelet function that are still unknown. The primary aim of the study is to describe the effect of citrate on coagulation and fibrinolysis pathways in both the patient and the haemodialysis circuit...
October 2, 2017: BMC Nephrology
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