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Coagulation, hemostasis

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https://www.readbyqxmd.com/read/29350493/bleeding-and-thrombotic-complications-of-pediatric-liver-transplant
#1
Alexandra J Borst, Debra L Sudan, Laura A Wang, Michael J Neuss, Jennifer A Rothman, Thomas L Ortel
BACKGROUND: Pediatric patients undergoing liver transplant are at significant risk for bleeding and thrombotic complications due to the complex nature of rebalanced hemostasis in patients with liver disease. METHODS/OBJECTIVES: We reviewed records of 92 pediatric liver and multivisceral transplant cases at Duke University Medical Center between January 2009 and December 2015. The goal was to define the nature and incidence of bleeding and thrombotic complications in this cohort and define potential risk factors...
January 19, 2018: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/29340130/mechanism-action-of-platelets-and-crucial-blood-coagulation-pathways-in-hemostasis
#2
REVIEW
Mercy Halleluyah Periayah, Ahmad Sukari Halim, Arman Zaharil Mat Saad
Blood is considered to be precious because it is the basic necessity for health; our body needs a steady provision of oxygen, supplied via blood, to reach billions of tissues and cells. Hematopoiesis is the process that generates blood cells of all lineages. However, platelets are the smallest blood component produced from the very large bone marrow cells called megakaryocytes and they play a fundamental role in thrombosis and hemostasis. Platelets contribute their hemostatic capacity via adhesion, activation and aggregation, which are triggered upon tissue injury, and these actions stimulate the coagulation factors and other mediators to achieve hemostasis...
October 1, 2017: International Journal of Hematology-oncology and Stem Cell Research
https://www.readbyqxmd.com/read/29337700/increased-resistance-to-tissue-plasminogen-activator-induced-fibrinolysis-in-healthy-subjects-from-thailand
#3
Nathan J White, Nicholas Taflin, Esther B Lim, Osaree Akaraborworn
: There is significant variability in blood coagulation among world populations. In particular, there may exist important differences in regulation of the fibrinolytic system in Asian populations that contribute to diseases of thrombosis and hemostasis. To investigate this issue, we compared fibrinogen concentration, plasma clot formation, and fibrinolytic resistance of healthy Asian subjects from Hat Yai, Songkhla, Thailand (Thai) vs. healthy North American subjects from Seattle, Washington, USA (SEA). Citrated plasma samples were obtained from healthy adult volunteers...
January 13, 2018: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/29337125/facilitating-hemostasis-after-proximal-aortic-surgery-results-of-the-protect-trial
#4
Ali Khoynezhad, Jacob DelaRosa, Marc R Moon, William T Brinkman, Richard B Thompson, Nimesh D Desai, S Chris Malaisrie, Leonard N Girardi, Joseph E Bavaria, T Brett Reece
BACKGROUND: This study intended to evaluate the safety and hemostatic efficacy of a novel vascular sealant (Tridyne™ , Neomend, Inc., Irvine, CA) compared to an accepted adjunctive hemostatic agent applied to aortotomy and sutures lines in cardiovascular surgery. METHODS: Subjects undergoing aortic valve replacement, ascending aortic replacement and/or aortic root replacement were randomized 2:1 to Tridyne™ (n =107) or Gelfoam®+ (Gelfoam®+, Baxter Healthcare Corp...
January 11, 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29332812/thrombodynamics-a-new-global-coagulation-test-measurement-of-heparin-efficiency
#5
Elena I Sinauridze, Tatiana A Vuimo, Ivan D Tarandovskiy, Ruzanna A Ovsepyan, Stepan S Surov, Natalia G Korotina, Ilya I Serebriyskiy, Maxim M Lutsenko, Alexander L Sokolov, Fazoil I Ataullakhanov
The actual coagulation status may be reliably measured using only highly sensitive global functional tests; however, they are not numerous and all of them have disadvantages. Thrombodynamics (TD), a novel global coagulation test, is sensitive to hypo- and hypercoagulable states. The main properties of this test were investigated, and its capabilities for hemostasis analysis were verified through pharmacodynamic monitoring of the most widely used anticoagulants, heparins. The anticoagulant effects in the plasma of donors (n = 20) and patients after hip replacement (n = 20) spiked with unfractionated heparin or enoxaparin were measured in vitro to eliminate the influence of pharmacokinetic factors...
April 1, 2018: Talanta
https://www.readbyqxmd.com/read/29329473/intrabiliary-argon-plasma-coagulation-hemostasis-by-direct-cholangioscopy-for-a-tricky-post-ercp-bleeding
#6
Andrea Anderloni, Francesco Auriemma, Alessandro Fugazza, Roberta Maselli, Alessandro Repici
No abstract text is available yet for this article.
January 12, 2018: Endoscopy
https://www.readbyqxmd.com/read/29324425/comparison-of-a-saline-coupled-bipolar-sealer-versus-traditional-electrosurgery-in-a-porcine-model-of-chronic-wound-healing
#7
Darvin J Griffin, Palaniswamy Vijay, Molly Speltz, Nicole Kirchhof, Joshua G Vose
OBJECTIVE: This study examines the healing dynamics of in vivo porcine muscle tissue wounds hemostatically treated with a saline-coupled bipolar tissue sealer (SCBS) compared with traditional electrosurgical (ES) coagulation. MATERIALS AND METHODS: Six cutaneous incisions were created on the dorsum of 28 adult male Yorkshire swine. The underlying muscle tissue was incised with a cold scalpel then treated with either SCBS (at 170 W) or traditional ES (at Coag 45 W)...
December 2017: Wounds: a Compendium of Clinical Research and Practice
https://www.readbyqxmd.com/read/29323190/angiopoietins-bind-thrombomodulin-and-inhibit-its-function-as-a-thrombin-cofactor
#8
Christopher Daly, Xiaozhong Qian, Carla Castanaro, Elizabeth Pasnikowski, Xiabo Jiang, Benjamin R Thomson, Susan E Quaggin, Nicholas Papadopoulos, Yang Wei, John S Rudge, Gavin Thurston, George D Yancopoulos, Samuel Davis
Angiopoietin-1 (Ang1) and Angiopoietin-2 (Ang2) are ligands for Tie2, an endothelial-specific receptor tyrosine kinase that is an essential regulator of angiogenesis. Here we report the identification, via expression cloning, of thrombomodulin (TM) as another receptor for Ang1 and Ang2. Thrombomodulin is an endothelial cell surface molecule that plays an essential role as a coagulation inhibitor via its function as a cofactor in the thrombin-mediated activation of protein C, an anticoagulant protein, as well as thrombin-activatable fibrinolysis inhibitor (TAFI)...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29321571/thrombin-fe3o4-nanoparticles-for-use-as-a-hemostatic-agent-in-internal-bleeding
#9
Emiliya M Shabanova, Andrey S Drozdov, Anna F Fakhardo, Ivan P Dudanov, Marina S Kovalchuk, Vladimir V Vinogradov
Bleeding remains one of the main causes of premature mortality at present, with internal bleeding being the most dangerous case. In this paper, magnetic hemostatic nanoparticles are shown for the first time to assist in minimally invasive treatment of internal bleeding, implying the introduction directly into the circulatory system followed by localization in the bleeding zone due to the application of an external magnetic field. Nanoparticles were produced by entrapping human thrombin (THR) into a sol-gel derived magnetite matrix followed by grinding to sizes below 200 nm and subsequent colloidization...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29321368/vkor-paralog-vkorc1l1-supports-vitamin-k-dependent-protein-carboxylation-in-vivo
#10
Julie Lacombe, Mark A Rishavy, Kathleen L Berkner, Mathieu Ferron
Vertebrates possess 2 proteins with vitamin K oxidoreductase (VKOR) activity: VKORC1, whose vitamin K reduction supports vitamin K-dependent (VKD) protein carboxylation, and VKORC1-like 1 (VKORC1L1), whose function is unknown. VKD proteins include liver-derived coagulation factors, and hemorrhaging and lethality were previously observed in mice lacking either VKORC1 or the γ-glutamyl carboxylase (GGCX) that modifies VKD proteins. Vkorc1-/- mice survived longer (1 week) than Ggcx-/- mice (midembryogenesis or birth), and we assessed whether VKORC1L1 could account for this difference...
January 11, 2018: JCI Insight
https://www.readbyqxmd.com/read/29317453/targeting-anticoagulant-protein-s-to-improve-hemostasis-in-hemophilia
#11
Raja Prince, Luca Bologna, Mirko Manetti, Daniela Melchiorre, Irene Rosa, Natacha Dewarrat, Silvia Suardi, Poorya Amini, José A Fernández, Laurent Burnier, Claudia Quarroz, Maria Desiré Reina Caro, Yasuhiro Matsumura, Johanna A Kremer Hovinga, John H Griffin, Hans-Uwe Simon, Lidia Ibba-Manneschi, François Saller, Sara Calzavarini, Anne Angelillo-Scherrer
Improved treatments are needed for hemophilia A and B, bleeding disorders affecting 400,000 people worldwide. We investigated whether targeting protein S could promote hemostasis in hemophilia by re-balancing coagulation. Protein S is an anticoagulant acting as cofactor for activated protein C and tissue factor pathway inhibitor (TFPI). This dual role makes PS a key regulator of thrombin generation. Here, we report that targeting protein S rebalances coagulation in hemophilia. Protein S gene targeting in hemophilic mice protected them against bleeding, especially when intra-articular...
January 9, 2018: Blood
https://www.readbyqxmd.com/read/29310703/management-of-persistent-epistaxis-using-floseal-hemostatic-matrix-vs-traditional-nasal-packing-a-prospective-randomized-control-trial
#12
Scott Murray, Adrian Mendez, Alexander Hopkins, Hamdy El-Hakim, Caroline C Jeffery, David W J Côté
BACKGROUND: Epistaxis is the most common emergent consultation to otolaryngology-head & neck surgery (OHNS) and with 60% of the population having experienced an episode and 1.6 in 10,000 requiring hospitalization in their lifetime. In preliminary studies Floseal® (Baxter, USA) Hemostatic Matrix has shown efficacy in up to 80% of persistent anterior epistaxis. We sought to evaluate the clinical efficacy and cost-effectiveness of Floseal® (Baxter, USA) compared to traditional nasal packing for persistent epistaxis...
January 8, 2018: Journal of Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/29296958/characterizing-the-o-glycosylation-landscape-of-human-plasma-platelets-and-endothelial-cells
#13
Sarah L King, Hiren J Joshi, Katrine T Schjoldager, Adnan Halim, Thomas D Madsen, Morten H Dziegiel, Anders Woetmann, Sergey Y Vakhrushev, Hans H Wandall
The hemostatic system comprises platelet aggregation, coagulation, and fibrinolysis, and is critical to the maintenance of vascular integrity. Multiple studies indicate that glycans play important roles in the hemostatic system; however, most investigations have focused on N-glycans because of the complexity of O-glycan analysis. Here we performed the first systematic analysis of native-O-glycosylation using lectin affinity chromatography coupled to liquid chromatography mass spectrometry (LC-MS)/MS to determine the precise location of O-glycans in human plasma, platelets, and endothelial cells, which coordinately regulate hemostasis...
February 28, 2017: Blood Advances
https://www.readbyqxmd.com/read/29276028/evaluation-for-effects-of-severe-acidosis-on-hemostasis-in-trauma-patients-using-thrombelastography-analyzer
#14
Xin Lv, Yong Mao, Zonghe Qin
OBJECTIVE: To investigate effects of metabolic acidosis on hemostasis function in trauma patients using thromboelastography analyzer. METHODS: 65 critically injured patients and 19 healthy volunteers were enrolled in the study. Three samples of whole blood were collected from each patient or healthy volunteer. These three samples were acidified with 50mmol/l phosphate-buffered saline (PBS) (pH5.8) or a neutral buffer (50mmol/l phosphate, pH7.4) and acidified blood sample with target pH of 6...
December 14, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29274910/disruption-of-liver-development-and-coagulation-pathway-by-ochratoxin-a-in-embryonic-zebrafish
#15
Ting-Shuan Wu, Yu-Ting Lin, Ying-Tzu Huang, Ya-Chih Cheng, Feng-Yih Yu, Biing-Hui Liu
Ochratoxin A (OTA) is a mycotoxin that is found in various food and feed products. The molecular mechanisms that are associated with OTA hepatotoxicity and teratogenicity have not been extensively elucidated in a developing organism. In this study, the transcriptomic profile of zebrafish embryos indicates that hemostasis and blood coagulation are the top two pathways affected by OTA. The treatment of embryos with OTA was able to decrease the expression of genes that encode coagulation factors and liver markers, including f7, f9b, cp and vtna...
December 21, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29249197/evaluation-of-the-hemocompatibility-of-rada-16-i-peptide
#16
Laleh Taghavi, Asieh Aramvash, Mansooreh Sadat Seyedkarimi, Narges Malek Sabet
RADA 16-I is an ionic self-assembling peptide that can form macroscopic scaffolds through β-sheet structures which are used in favor of cell growth and tissue engineering. This peptide has also the ability to stop bleeding effectively and quickly (∼20 seconds) when applied directly to the injuries. This study is focused on coagulation process, platelet aggregation, C3 and C4 concentrations, CBC counting, hemolysis, and white blood cell morphology tests to analyze hemocompatibility of RADA 16-I at different concentrations - 0...
January 1, 2017: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29247766/fibrin-based-delivery-strategies-for-acute-and-chronic-wound-healing
#17
P Heher, S Mühleder, R Mittermayr, H Redl, P Slezak
Fibrin, a natural hydrogel, is the end product of the physiological blood coagulation cascade and naturally involved in wound healing. Beyond its role in hemostasis, it acts as a local reservoir for growth factors and as a provisional matrix for invading cells that drive the regenerative process. Its unique intrinsic features do not only promote wound healing directly via modulation of cell behavior but it can also be fine-tuned to evolve into a delivery system for sustained release of therapeutic biomolecules, cells and gene vectors...
December 13, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29246902/identification-of-the-coagulation-factor-viia-integrin-binding-site-required-for-pro-angiogenic-par2-signaling
#18
Andrea S Rothmeier, Enbo Liu, Sagarika Chakrabarty, Jennifer Disse, Barbara M Mueller, Henrik Østergaard, Wolfram Ruf
The tissue factor (TF) pathway serves both hemostasis and cell signaling, but how cells control these divergent functions of TF remains incompletely understood. TF is the receptor and scaffold of coagulation proteases cleaving protease activated receptor (PAR) 2 that plays pivotal roles in angiogenesis and tumor development. Here we demonstrate that coagulation factor (F) VIIa elicits TF cytoplasmic domain-dependent pro-angiogenic cell signaling independent of the alternative PAR2 activator matriptase. We identify a Lys-Gly-Glu (KGE) integrin binding motif in the FVIIa protease domain that is required for association of the TF-FVIIa complex with the active conformer of integrin β1...
December 15, 2017: Blood
https://www.readbyqxmd.com/read/29239153/time-to-change-the-classical-vision-of-coagulation-in-liver-disease-from-the-balance-disequilibrium-to-the-systems-biology-network-modelling
#19
Annabel Blasi, Joan C Reverter
The longstanding dogma that patients with liver disease have a hemostasis related bleeding tendency is neglected from the last 10 years however, despite this tremendous change of paradigm no longer progress had been made in this field. A mathematical model is a description of a system using mathematical concepts and language. Mathematical models are able to analyze large amount of data and they can make predictions about behavior. Mathematical models are used in the social sciences, engineering as well as in medicine...
December 13, 2017: Minerva Anestesiologica
https://www.readbyqxmd.com/read/29224833/hemostasis-and-lipoprotein-indices-signify-exacerbated-lung-injury-in-tuberculosis-with-diabetes-comorbidity
#20
Zhengwei Dong, Jingyun Shi, Anca Dorhoi, Jie Zhang, Adiilah K Soodeen-Lalloo, Wenlin Chen, Hongyun Yin, Wei Sha, Weitong Li, Ruijuan Zheng, Zhonghua Liu, Hua Yang, Lianhua Qin, Jie Wang, Xiaochen Huang, Chunyan Wu, Stefan H E Kaufmann, Yonghong Feng
BACKGROUND: Exacerbated immunopathology is a frequent consequence of tuberculosis (TB) that is complicated by diabetes mellitus (DM), yet the underlying mechanisms are still poorly defined. METHODS: In the two groups of age- and gender-matched TB patients with (DM-TB) and without DM (NDM-TB), we microscopically evaluated the areas of caseous necrosis and graded the extent of perinecrotic fibrosis in lung biopsies from the sputum smear-negative (SN) patients. We scored acid-fast bacilli in smear-positive (SP) patients and compiled computed tomography data from both SN-TB and SP-TB patients...
December 7, 2017: Chest
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