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Clotting factors

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https://www.readbyqxmd.com/read/29156107/hemodynamic-force-triggers-rapid-netosis-within-sterile-thrombotic-occlusions
#1
X Yu, J Tan, S L Diamond
BACKGROUND: Neutrophil extracellular traps (NETs) are released when neutrophils encounter infectious pathogens, especially during sepsis. Additionally, NETosis occurs during venous and arterial thrombosis, disseminated intravascular coagulation, and trauma. OBJECTIVE: We tested if hemodynamic forces trigger NETosis during sterile thrombosis. METHODS: NETs were imaged with Sytox-green during microfluidic perfusion of Factor XIIa-inhibited or thrombin-inhibited human whole blood over fibrillar collagen (± tissue factor)...
November 20, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/29154788/a-multianalytical-approach-to-investigate-the-effect-of-nanofiltration-on-plasma-derived-factor-ix-clinical-lots
#2
Rosita Russo, Giuseppina Focà, Camilla Rega, Annamaria Sandomenico, Nunzianna Doti, Filippo Mori, Marcella Maddaluno, Claudio Farina, Menotti Ruvo, Angela Chambery
Plasma-derived proteins are a subset of relevant biotherapeutics also known as "well-characterized biologicals". They are enriched from plasma through several steps of physical and biochemical methodologies, reaching the regulatory accepted standards of safety, levels of impurities, activity and lot-to-lot consistency. Final products accepted for commercialization are submitted to tight analytical, functional and safety controls by a number of different approaches that fulfill the requirements of sensitivity and reliability...
November 14, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/29148431/comparative-efficacy-of-hemorrhage-control-of-a-novel-mesoporous-bioactive-glass-versus-two-commercial-hemostats
#3
Sara Pourshahrestani, Nahrizul Adib Bin Kadri, Ehsan Zeimaran, Nicola Gargiulo, Shani Samuel, Sangeetha Vasudevaraj Naveen, Khairunnisa Hasikin, Tunku Kamarul, Mark R Towler
Mesoporous bioactive glass containing 1% Ga2O3 (1%Ga-MBG) is attractive for hemorrhage control because of its surface chemistry which can promote blood-clotting. The present study compares this proprietary inorganic coagulation accelerator with two commercial hemostats, CeloxTM (CX) and QuikClot Advanced Clotting Sponge PlusTM (ACS+). The results indicate that the number of adherent platelets were higher on the 1%Ga-MBG and CX surfaces than ACS+ whereas a greater contact activation was seen on 1%Ga-MBG and ACS+ surfaces than CX...
November 17, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/29145340/open-repair-of-intraoperative-popliteal-artery-injury-during-total-knee-arthroplasty-in-a-patient-with-severe-hemophilia-a-a-case-report-and-literature-review
#4
Bin Feng, Ke Xiao, Jiang Shao, Yu Fan, Xisheng Weng
RATIONALE: Arterial injuries during total knee arthroplasty (TKA) though rare may occur. Hemophilia may further challenge the management of such injury. PATIENT CONCERNS: A 48-year-old male patient with severe hemophilia type A and stiff knee arthropathy underwent bilateral TKAs. Left popliteal artery injury was detected at the end of the left TKA. DIAGNOSES: Urgent angiography confirmed the diagnosis of the left popliteal artery transection...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29142987/prospective-study-of-routine-heparin-avoidance-hemodialysis-in-a-tertiary-acute-care-inpatient-practice
#5
Sami Safadi, Robert C Albright, John J Dillon, Amy W Williams, Fares Alahdab, Julie K Brown, Amanda L Severson, Walter K Kremers, Mary Ann Ryan, Marie C Hogan
Introduction: Extracorporeal circuit (EC) anticoagulation with heparin is a key advance in hemodialysis (HD), but anticoagulation is problematic in inpatients at risk of bleeding. We prospectively evaluated a heparin-avoidance HD protocol, clotting of the EC circuit (CEC), impact on dialysis efficiency, and associated risk factors in our acute care inpatients who required HD (January 17, 2014 to May 31, 2015). Methods: HD sessions without routine EC heparin were performed using airless dialysis tubing...
July 2017: KI Reports
https://www.readbyqxmd.com/read/29142540/clinical-audit-of-dengue-related-deaths-in-2011-mayo-hospital-lahore-pakistan
#6
Somia Iqtadar, Nabeel Akbar, Mehreen Mehmood, Sajid Abaidullah
Background and Objective: Dengue infection has evolved into an epidemic during last few years in Pakistan and has been associated with poor outcomes. Literature with respect to mortality risk factors in Dengue infection is not sufficient. This compelled us to conduct this study to find out major contributory factors to death in patients with dengue viral infection at one of Asia's ancient hospital setting with an aim to recognize complications at earliest and improve case management in future...
September 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/29137999/structural-and-functional-changes-of-fibrinogen-due-to-aging
#7
Nikola Gligorijević, Martina Zámorová Križáková, Ana Penezić, Jaroslav Katrlík, Olgica Nedić
Different factors affect coagulation process. Since fibrinogen is the main coagulation factor, the influence of aging on fibrinogen structure and function was investigated in this study. Fibrinogen was isolated from plasma obtained from healthy persons in the age range 21-83 and examined. Lectin microarray analysis demonstrated increased glycosylation of fibrinogen due to aging, with predominant increase in high-mannose or hybrid type N-glycans, as well as tri-/tetraantennary complex N-glycans with greater content of galactose and N-acetylglucosamine residues...
November 11, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29131074/tranexamic-acid-failed-to-reverse-the-anticoagulant-effect-and-bleeding-by-an-oral-direct-factor-xa-inhibitor-edoxaban
#8
Yuko Honda, Taketoshi Furugohri, Yoshiyuki Morishima
BACKGROUND/AIMS: Agents to reverse the anticoagulant effect of edoxaban, an oral direct factor Xa inhibitor, would be desirable in emergency situations. The aim of this study is to determine the effect of tranexamic acid, an antifibrinolytic agent, on the anticoagulant activity and bleeding by edoxaban in rats. METHODS: A supratherapeutic dose of edoxaban (3 mg/kg) was intravenously administered to rats. Three minutes after dosing, tranexamic acid (100 mg/kg) was given intravenously...
November 3, 2017: Pharmacology
https://www.readbyqxmd.com/read/29130005/a-case-of-haematometra-secondary-to-cervical-stenosis-after-vesicle-vaginal-fistula-surgical-repair
#9
Athanase Lilungulu, Willy Mwibea, Mzee Nassoro, Balthazar Gumodoka
Background. Haematometra is a rare postobstetrics fistula surgical repair outcome complication; however the condition can be misinterpreted especially in limited resource areas that lack routine ultrasound guidance and with a slowly progressed increase in size of abdomen accompanied with a history of amenorrhoea together with a history of having unprotective sexual intercourse which may increase the possibility of being controversial to full-term gravid uterus. The causes of haematometra might be either due to congenital abnormality of the vaginal canal or acquired iatrogenically...
2017: Case Reports in Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29127473/colorectal-cancer-and-thrombosis
#10
P A Rees, H W Clouston, S Duff, C C Kirwan
SIGNIFICANCE: Colorectal cancer (CRC), results in a hypercoagulable state which manifests clinically as venous thromboembolism (VTE), often presenting as a deep vein thrombosis (DVT) or pulmonary embolism (PE). The consequences of VTE in CRC can be devastating, resulting in long-term morbidity and are a frequent cause of death, even amongst those who would have otherwise had a favourable cancer prognosis. The incidence of VTE in all cancers is increasing, whilst the exact incidence of VTE in CRC is likely to be underestimated...
November 10, 2017: International Journal of Colorectal Disease
https://www.readbyqxmd.com/read/29126301/coagulation-testing-in-the-core-laboratory
#11
William E Winter, Sherri D Flax, Neil S Harris
Primary hemostasis begins with endothelial injury. VWF, produced by endothelial cells, binds to platelets and links them to subendothelial collagen. Platelet-derived ADP and thromboxane activate non-adhered platelets via their GPIIb/IIIa receptors, allowing these platelets to participate in platelet aggregation. Secondary hemostasis is initiated with the binding of factor VII to extravascular tissue factor (TF). Factors II, VII, IX and X are vitamin K-dependent factors. The role of vitamin K is to assist in the addition of gamma carboxylate groups to glutamic acids in the "GLA" domains of these factors...
November 8, 2017: Laboratory Medicine
https://www.readbyqxmd.com/read/29126055/estrogen-responsive-gene-networks-in-the-teleost-liver-what-are-the-key-molecular-indicators
#12
April Feswick, Kelly R Munkittrick, Christopher J Martyniuk
An overarching goal of environmental genomics is to leverage sensitive suites of markers that are robust and reliable to assess biological responses in a range of species inhabiting variable environments. The objective of this study was to identify core groups of transcripts and molecular signaling pathways that respond to 17alpha-ethylinestadiol (EE2), a ubiquitous estrogenic contaminant, using transcriptome datasets generated from six independent laboratories. We sought to determine which biomarkers and gene networks were those most robust and reliably detected in multiple laboratories...
October 31, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/29125171/nanomechanical-clinical-coagulation-diagnostics-and-monitoring-of-therapies
#13
Francesco Padovani, James Duffy, Martin Hegner
Clinical coagulation diagnostics often requires multiple tests. Coagulation times are a first indication of an abnormal coagulation process, such as a coagulation factor deficiency. To determine the specific deficient factor, additional immuno- and/or enzyme assays are necessary. Currently, every clinical laboratory has to normalize their assays (international normalized ratio, INR), and therefore, certain variability within the clinical analytics exists. We report a novel strategy for a quick, reliable and quantitative diagnosis of blood coagulation diseases (e...
November 10, 2017: Nanoscale
https://www.readbyqxmd.com/read/29125132/chitosan-inhibits-platelet-mediated-clot-retraction-increases-platelet-derived-growth-factor-release-and-increases-residence-time-and-bioactivity-of-platelet-rich-plasma-in-vivo
#14
Gabrielle Deprés-Tremblay, Anik Chevrier, Nicolas Tran-Khanh, Monica Nelea, Michael D Buschmann
Platelet-rich plasma (PRP) has been used to treat different orthopedic conditions, however, the clinical benefits of using PRP remain uncertain. Chitosan (CS)-PRP implants have been shown to improve meniscus, rotator cuff and cartilage repair in pre-clinical models. The purpose of this current study was to investigate in vitro and in vivo mechanisms of action of CS-PRP implants. Freeze-dried formulations containing 1% (w/v) CS (80% degree of deacetylation and number average molar mass 38 kDa), 1% (w/v) trehalose as a lyoprotectant and 42...
November 10, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/29124459/differences-in-clotting-parameters-between-species-for-preclinical-large-animal-studies-of-cardiovascular-devices
#15
Toshihide Mizuno, Tomonori Tsukiya, Yoshiaki Takewa, Eisuke Tatsumi
Several species of domestic animals are used in preclinical studies evaluating the safety and feasibility of medical devices; however, the relevance of animal models to human health is often not clear. The purpose of this study was to compare the clotting parameters of animal models to determine which animals most adequately mimic human clotting parameters. The clotting parameters of the different species were assessed in whole blood by in vitro thromboelastography using the clotting activators, such as tissue factor (extrinsic clotting screening test, EXTEM(®)) and partial thromboplastin phospholipid (intrinsic clotting screening test, IINTEM(®))...
November 9, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29118060/association-between-inflammatory-markers-and-progression-to-kidney-dysfunction-examining-different-assessment-windows-in-patients-with-type-1-diabetes
#16
Nathaniel L Baker, Kelly J Hunt, Danielle R Stevens, Gabor Jarai, Glenn D Rosen, Richard L Klein, Gabriel Virella, Maria F Lopes-Virella
OBJECTIVE: To determine whether biomarkers of inflammation and endothelial dysfunction are associated with the development of kidney dysfunction and the time frame of their association. RESEARCH DESIGN AND METHODS: Biomarkers were measured at four time points during 28 years of treatment and follow-up in patients with type 1 diabetes in the DCCT/EDIC cohort. In addition to traditional biomarkers of inflammation (C-reactive protein and fibrinogen), we measured interleukin-6 (IL-6) and soluble tumor necrosis factor receptors 1 and 2 (sTNFR-1/2), markers of endothelial dysfunction (soluble intracellular adhesion molecule-1, vascular cell adhesion molecule-1, and E-selectin [sE-selectin]), and fibrinolysis (total and active plasminogen activator inhibitor-1 [PAI-1])...
November 8, 2017: Diabetes Care
https://www.readbyqxmd.com/read/29117741/%C3%AE-thromboglobulin-may-not-reflect-platelet-activation-during-haemodialysis-with-the-hepran-membrane
#17
Solbjørg Sagedal, Leiv Sandvik, Olav Klingenberg, Per Morten Sandset
BACKGROUND: When blood passes through the extracorporeal circuit during haemodialysis (HD) undesirable effects including platelet degranulation and coagulation activation take place. β-thromboglobulin (β-TG) is a sensitive marker of platelet activation. The aim of this study was to investigate platelet degranulation and coagulation activation during HD with the heparin-coated dialysis membrane HeprAN. METHODS: Four HD sessions were evaluated in each of 12 chronic HD patients...
December 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/29117532/structure-mechanics-and-instability-of-fibrin-clot-infected-with-staphylococcus-epidermidis
#18
Tianhui Maria Ma, J Scott VanEpps, Michael J Solomon
Health care-associated infection, over half of which can be attributed to indwelling medical devices, is a strong risk factor for thromboembolism. Although most experimental models of medical device infection draw upon isolated bacterial biofilms, in fact there is no infection without host protein contribution. Here we study, to our knowledge, a new model for medical device infection-that of an infected fibrin clot-and show that the common blood-borne pathogen Staphylococcus epidermidis influences this in vitro model of a blood clot mechanically and structurally on both microscopic and macroscopic scales...
November 7, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/29111325/inhibition-of-tissue-factor-signaling-in-breast-tumour-xenografts-induces-widespread-changes-in-the-microrna-expression-profile
#19
Esterina D'Asti, G Mark Anderson, Janusz Rak
Tissue factor (TF) is a transmembrane receptor for coagulation factor VII/VIIa that is frequently overexpressed by cancer cells. The TF/VIIa complex acts as the main initiator of the clotting cascade in blood and a trigger of intracellular signaling that changes gene expression and the cellular phenotype. However, pathways mediating these changes are still poorly characterized and especially the impact of TF signals on regulatory microRNA (miR) networks in cancer remains unknown. We show that the monoclonal antibody that selectively neutralises the signaling (but not coagulant) function of human TF (CNTO 2559) inhibits progression of MDA-MB-231 breast cancer xenografts in mice and prolongs animal survival...
October 27, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29108898/thymidine-phosphorylase-a-potential-new-target-for-treating-cardiovascular-disease
#20
REVIEW
Wei Li, Hong Yue
We recently found that thymidine phosphorylase (TYMP), also known as platelet-derived endothelial cell growth factor, plays an important role in platelet activation in vitro and thrombosis in vivo by participating in multiple signaling pathways. Platelets are a major source of TYMP. Since platelet-mediated clot formation is a key event in several fatal diseases, such as myocardial infarction, stroke and pulmonary embolism, understanding TYMP in depth may lead to uncovering novel mechanisms in the development of cardiovascular diseases...
October 20, 2017: Trends in Cardiovascular Medicine
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