keyword
MENU ▼
Read by QxMD icon Read
search

Blood clotting factors

keyword
https://www.readbyqxmd.com/read/28723699/intraoperative-bleeding-in-patients-with-osteogenesis-imperfecta-type-iii-treated-by-fassier-duval-femoral-rodding-analysis-of-risk-factors
#1
Pietro Persiani, Maria V Pesce, Lorena Martini, Filippo M Ranaldi, Patrizia D'Eufemia, Anna Zambrano, Mauro Celli, Ciro Villani
The surgical treatment of osteogenesis imperfecta (OI) is negatively influenced by clinical features such as osteoporosis, limb deformities and bone changes caused by bisphosphonate therapy. Blood loss during femoral nailing surgeries in patients with OI is a serious problem. Platelet anomalies have been associated with an elevation of the serum pyrophosphate originating from the platelets during clotting, even if the causality with the platelet dysfunction has not yet been established. To identify predictive risk factors regarding intraoperative bleeding, a retrospective analysis was conducted on 23 patients aged between 6 and 13 years, affected by OI type III, who were treated to correct femoral deformities or to perform an osteosynthesis for femoral shaft fractures, using the Fassier-Duval telescopic nail...
July 18, 2017: Journal of Pediatric Orthopedics. Part B
https://www.readbyqxmd.com/read/28716745/gut-derived-endotoxin-stimulates-factor-viii-secretion-from-endothelial-cells-implications-for-hypercoagulability-in-cirrhosis
#2
Carnevale Roberto, Raparelli Valeria, Nocella Cristina, Bartimoccia Simona, Novo Marta, Severino Anna, De Falco Elena, Cammisotto Vittoria, Pasquale Chiara, Crescioli Clara, Sili Scavalli Antonio, Riggio Oliviero, Basili Stefania, Violi Francesco
BACKGROUND & AIMS: Patients with cirrhosis display enhanced blood levels of factor VIII, which may result in harmful activation of the clotting system; however, the underlying mechanism is unknown. METHODS: We performed a cross-sectional study in cirrhotic patients (n=61) and matched controls (n=61) comparing blood levels of factor VIII, von Willebrand factor (vWf), lipopolysaccharide (LPS) and positivity for Escherichia Coli DNA. Furthermore, we performed an in-vitro study to investigate if LPS, in a range of concentration similar to that found in the peripheral circulation of cirrhotic patients, was able to elicit factor VIII secretion from human umbilical vein endothelial cells (HUVEC)...
July 14, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28715312/new-directions-for-treating-bleeding-disorders-from-tests-for-platelet-strength-to-malleable-hydrogel-research-is-advancing-understanding-diagnosis-and-treatment-of-this-difficult-condition
#3
Mary Bates
Most people don't worry about small cuts or wounds, because their bodies form clots to stop the bleeding. This process, called coagulation or hemostasis, requires certain blood cells, platelets, and protein clotting factors to interact correctly and form a clot to stanch the bleeding and begin repair of the damaged blood vessel.
July 2017: IEEE Pulse
https://www.readbyqxmd.com/read/28713010/hemolectin-expression-reveals-functional-heterogeneity-in-honey-bee-apis-mellifera-hemocytes
#4
Erika Gábor, Gyöngyi Cinege, Gábor Csordás, Tibor Török, Katalin Folkl-Medzihradszky, Zsuzsanna Darula, István Andó, Éva Kurucz
The identification of molecular markers considerably facilitated the classification and functional analysis of blood cell types. Apis mellifera hemocytes have been classified by morphological criteria and lectin binding properties; however, the use of molecular markers has been minimal. Here we describe a monoclonal antibody to a non-phagocytic subpopulation of A. mellifera hemocytes and to a constituent of the hemolymph clot. We demonstrate that the antibody identifies the A. mellifera hemolectin, a protein carrying human von Willebrand factor homology domains, characteristic of proteins involved in blood coagulation and platelet aggregation in mammals...
July 13, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28698680/activated-monocytes-enhance-platelet-driven-contraction-of-blood-clots-via-tissue-factor-expression
#5
Alina D Peshkova, Giang Le Minh, Valerie Tutwiler, Izabella A Andrianova, John W Weisel, Rustem I Litvinov
Platelet-driven reduction in blood clot volume (clot contraction or retraction) has been implicated to play a role in hemostasis and thrombosis. Although these processes are often linked with inflammation, the role of inflammatory cells in contraction of blood clots and thrombi has not been investigated. The aim of this work was to study the influence of activated monocytes on clot contraction. The effects of monocytes were evaluated using a quantitative optical tracking methodology to follow volume changes in a blood clot formed in vitro...
July 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28693686/the-correlation-of-indices-in-r-teg-with-intra-operative-blood-loss-in-neurosurgical-patients
#6
Zhang Xue, Yu Xuerong, Huang Yuguang
Objective Intra-operative coagulopathy has a close relationship with blood loss and the prognosis of patients. Rapid-thrombelastography (r-TEG) is a comprehensive assessment of coagulation abnormalities and also an effective way for constructing blood transfusion. This study attempts to investigate the correlation of r-TEG indices with intra-operative hemorrhage.Methods Patients who underwent transphenoidal hypophysectomy and craniotomy from January 15 to April 30, 2013 in Peking Union Medical College hospital were recruited...
June 10, 2017: Chinese Medical Sciences Journal, Chung-kuo i Hsüeh K'o Hsüeh Tsa Chih
https://www.readbyqxmd.com/read/28688133/in-silico-evaluation-of-limited-blood-sampling-strategies-for-individualized-recombinant-factor-ix-prophylaxis-in-hemophilia-b-patients
#7
T Preijers, H C A M Hazendonk, K Fijnvandraat, F W G Leebeek, M H Cnossen, R A A Mathôt
BACKGROUND: Patients with severe hemophilia B regularly administer prophylactic intravenous doses of clotting factor IX (FIX) concentrate to maintain a trough level of at least 0.01 IUmL(-1) in order to prevent joint bleeds. Assessment of individual pharmacokinetic (PK) parameters allows individualization of the recombinant FIX (rFIX) dose. AIM: This in silico study aims to evaluate the predictive performance of limited sampling strategies (LSSs) with 1 to 3 samples to estimate individual PK parameters of rFIX...
July 8, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28687225/screening-cleavage-of-factor-xiii-v34x-activation-peptides-by-thrombin-mutants-a-strategy-for-controlling-fibrin-architecture
#8
Madhavi A Jadhav, Whitney N Goldsberry, Sara E Zink, Kelsey N Lamb, Katelyn E Simmons, Carmela M Riposo, Boris A Anokhin, Muriel C Maurer
In blood coagulation, thrombin converts fibrinogen into fibrin monomers that polymerize into a clot network. Thrombin also activates Factor XIII by cleaving the R37-G38 peptide bond of the Activation Peptide (AP) segment. The resultant transglutaminase introduces covalent crosslinks into the fibrin clot. A strategy to modify clot architecture would be to design FXIII AP sequences that are easier or more difficult to be thrombin-cleaved thus controlling initiation of crosslinking. To aid in this design process, FXIII V34X (28-41) activation peptides were kinetically ranked for cleavage by wild-type thrombin and several anticoagulant mutants...
July 4, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28686711/co-ordinated-spatial-propagation-of-blood-plasma-clotting-and-fibrinolytic-fronts
#9
Ansar S Zhalyalov, Mikhail A Panteleev, Marina A Gracheva, Fazoil I Ataullakhanov, Alexey M Shibeko
Fibrinolysis is a cascade of proteolytic reactions occurring in blood and soft tissues, which functions to disintegrate fibrin clots when they are no more needed. In order to elucidate its regulation in space and time, fibrinolysis was investigated using an in vitro reaction-diffusion experimental model of blood clot formation and dissolution. Clotting was activated by a surface with immobilized tissue factor in a thin layer of recalcified blood plasma supplemented with tissue plasminogen activator (TPA), urokinase plasminogen activator or streptokinase...
2017: PloS One
https://www.readbyqxmd.com/read/28684417/noncanonical-proteolytic-activation-of-human-prothrombin-by-subtilisin-from-bacillus-subtilis-may-shift-the-procoagulant-anticoagulant-equilibrium-toward-thrombosis
#10
Giulia Pontarollo, Laura Acquasaliente, Daniele Peterle, Ilaria Artusi, Vincenzo De Filippis
Blood coagulation is a finely regulated physiological process culminating with the factor Xa (FXa)-mediated conversion of the prothrombin (ProT) zymogen to active αthrombin (αT). In the prothrombinase complex on the platelet surface, FXa cleaves ProT at Arg271, generating the inactive precursor prethrombin-2 (Pre2), which is further attacked at Arg320-Ile321 to yield mature αT. Whereas the mechanism of physiological ProT activation has been elucidated in great detail, little is known about the role of bacterial proteases, possibly released in the bloodstream during infection, in inducing blood coagulation by direct proteolytic ProT activation...
July 6, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28683377/association-of-the-f13a1-val34leu-polymorphism-and-recurrent-pregnancy-loss-a-meta-analysis
#11
Jae Hyun Jung, Jae-Hoon Kim, Gwan Gyu Song, Sung Jae Choi
OBJECTIVE: Factor XIII (FXIII) plays role in stabilizing the linkage between fibrins during blood clotting and has been implicated in recurrent pregnancy loss (RPL). The relationship between the Val34Leu polymorphism in F13A1, which encodes the enzymatic subunit of FXIII, and RPL is unclear. The aim of this meta-analysis was to evaluate the association betweenF13A1 Val34Leu and the risk of RPL. STUDY DESIGN: We performed a meta-analysis of 11 studies involving 1092 cases and 678 controls using published literature from PubMed and Embase...
June 23, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28682477/preclinical-safety-and-efficacy-of-andexanet-alfa-in-animal-models
#12
G Lu, S J Hollenbach, D C Baker, S Tan, A Hutchaleelaha, J T Curnutte, P B Conley
BACKGROUND: Andexanet is a recombinant modified form of factor Xa (FXa), designed to bind to and reverse the anticoagulant activity of FXa inhibitors. OBJECTIVES: To evaluate the ability of andexanet to reverse the anticoagulant activity of rivaroxaban, and assess its pharmacokinetics (PK) and toxicity in animal models. METHODS: The effects of andexanet on blood loss, anti-FXa activity, rivaroxaban unbound plasma concentrations, and other coagulation parameters were assessed in a rabbit liver laceration 'treatment' model...
July 6, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28681632/graft-product-for-autologous-peripheral-blood-stem-cell-transplantation-enhances-thrombin-generation-and-expresses-procoagulant-microparticles-and-tissue-factor
#13
Fatoumata Sidibe, Anastasia Spanoudaki, Valerie Vanneaux, Elisabeth Mbemba, Jerome Larghero, Patrick Van Dreden, Jean-Pierre Lotz, Ismail Elalamy, Annette K Larsen, Grigoris T Gerotziafas
The beneficial effect of autologous peripheral blood stem cell transplantation (APBSCT) may be compromised by acute vascular complications related to hypercoagulability. We studied the impact of graft product on thrombin generation of normal plasma and the expression of tissue factor (TF) and procoagulant platelet-derived procoagulant microparticles (Pd-MPs) in samples of graft products. Graft products from 10 patients eligible for APBSCT were mixed with platelet-poor plasma (PPP) or platelet-rich plasma (PRP) from healthy volunteers and assessed for in vitro thrombin generation...
January 1, 2017: Clinical and Applied Thrombosis/hemostasis
https://www.readbyqxmd.com/read/28672932/intravascular-application-of-electrocautery-in-a-rabbit-model-of-abdominal-aortic-endarterectomy
#14
Chuan Wang, Yi Xin, Na Li, Diankun Li, Jingxing Li, Chengxiong Gu
Effective therapies for preventing perioperative complications such as thrombosis and inflammation after coronary endarterectomy (CE) are lacking. Electrocoagulation electrotomes have been routinely used in surgery for their cutting, clotting, and hemostatic properties. As strong flattening tools, their electrocautery function may prevent mechanical intimal-adventitial injury to arterial circulation and attenuate stenosis. The present study investigated the effects of intravascular application of electrocautery on ameliorating inflammation and thrombosis in a rabbit model of abdominal aortic endarterectomy...
July 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28671597/precipitation-and-neutralization-of-heparin-from-different-sources-by-protamine-sulfate
#15
John Hogwood, Barbara Mulloy, Elaine Gray
Current therapeutic unfractionated heparin available in Europe and US is of porcine mucosal origin. There is now interest, specifically in the US, to use bovine mucosa as an additional source for the production of heparin. The anticoagulant action of heparin can be neutralized by protamine sulfate, and in this study the ability of protamine to bind and neutralize the anticoagulant activities of heparin from porcine mucosa, bovine mucosa and bovine lung were assessed. Protamine sulfate was able to bind and precipitate similar amounts of heparins from different sources on a mass basis...
July 2, 2017: Pharmaceuticals
https://www.readbyqxmd.com/read/28661939/interactions-of-%C3%AE-amyloid-peptide-with-fibrinogen-and-coagulation-factor-xii-may-contribute-to-alzheimer-s-disease
#16
Hyung J Ahn, Zu-Lin Chen, Daria Zamolodchikov, Erin H Norris, Sidney Strickland
PURPOSE OF REVIEW: To review the evidence that the Alzheimer peptide β-amyloid interacts with the blood coagulation system and influences the pathophysiology of the disease. RECENT FINDINGS: β-amyloid can interact with fibrinogen and blood coagulation factor XII and trigger ischemia and inflammation. SUMMARY: β-amyloid interacts with fibrinogen and factor XII. These interactions can lead to increased clotting, abnormal clot formation, persistent fibrin deposition, and generation of proinflammatory molecules...
June 28, 2017: Current Opinion in Hematology
https://www.readbyqxmd.com/read/28655899/peptides-derived-from-marcks-block-coagulation-complex-assembly-on-phosphatidylserine
#17
Noah Kastelowitz, Ryo Tamura, Abimbola Onasoga, Timothy J Stalker, Ormacinda R White, Peter N Brown, Gary L Brodsky, Lawrence F Brass, Brian R Branchford, Jorge Di Paola, Hang Yin
Blood coagulation involves activation of platelets and coagulation factors. At the interface of these two processes resides the lipid phosphatidylserine. Activated platelets expose phosphatidylserine on their outer membrane leaflet and activated clotting factors assemble into enzymatically active complexes on the exposed lipid, ultimately leading to the formation of fibrin. Here, we describe how small peptide and peptidomimetic probes derived from the lipid binding domain of the protein myristoylated alanine-rich C-kinase substrate (MARCKS) bind to phosphatidylserine exposed on activated platelets and thereby inhibit fibrin formation...
June 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28652948/streptococcus-mutans-a-potential-risk-factor-in-recurrent-hemorrhagic-stroke
#18
Tarek R Mansour, Yasaman Alam, Layth Dahbour, Ahmed Alnemari, Mouhammad Jumaa, Jason L Schroeder
Stroke is the fifth leading cause of death and is responsible for approximately nine percent of all deaths worldwide. Cases of Streptococcus mutans (S. mutans)-induced intracerebral hemorrhage as a result of bloodstream infections have seldom been reported. New reports show that bacteria with specific collagen binding proteins (CBPs), such as the Cnm type produced by S. mutans, may inhibit platelet aggregation and cause bleeding. In this article, we report on a 62-year-old man with a recent history of left frontal intracerebral hemorrhage (ICH) who presented to the emergency department after a fall due to suspected seizure while in rehabilitation...
May 19, 2017: Curēus
https://www.readbyqxmd.com/read/28651441/the-effect-of-ex-vivo-factor-xiii-supplementation-on-clot-formation-in-blood-samples-from-cardiac-and-scoliosis-surgery-patients
#19
Caroline Shams Hakimi, Malin S Carling, Emma C Hansson, Helena Brisby, Camilla Hesse, Vladimir Radulovic, Anders Jeppsson
Excessive perioperative bleeding remains a substantial problem. Factor XIII (FXIII) contributes to clot stability, and it has therefore been suggested that supplementation with FXIII concentrate may improve perioperative hemostasis. We evaluated the effects of increasing doses of FXIII, alone or in combination with fibrinogen or platelet concentrate, in blood samples from 2 considerably different groups of surgical patients: cardiac and scoliosis surgery patients. Whole-blood samples were collected immediately after operation from cardiac and scoliosis surgery patients...
January 1, 2017: Clinical and Applied Thrombosis/hemostasis
https://www.readbyqxmd.com/read/28651073/hemophilia-a-inhibitor-treatment-the-promise-of-engineered-t-cell-therapy
#20
REVIEW
Kalpana Parvathaneni, Maha Abdeladhim, Kathleen P Pratt, David W Scott
Hemophilia A is a bleeding disorder caused by mutations in the gene encoding factor VIII (FVIII), a cofactor protein that is essential for normal blood clotting. Approximately, 1 in 3 patients with severe hemophilia A produce neutralizing antibodies (inhibitors) that block its biologic function in the clotting cascade. Current efforts to eliminate inhibitors consist of repeated FVIII injections under what is termed an "ITI" protocol (Immune Tolerance Induction). However, this method is extremely costly and approximately 30% of patients undergoing ITI do not achieve peripheral tolerance...
June 9, 2017: Translational Research: the Journal of Laboratory and Clinical Medicine
keyword
keyword
120134
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"