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Antithrombin 3

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https://www.readbyqxmd.com/read/28060970/-evaluation-of-oral-anticoagulation-with-rivaroxaban-in-patients-with-new-onset-non-valvular-atrial-fibrillation
#1
Víctor Neira, Ramón Corbalán, Jaime Pereira, Olga Panes, Bernardita Garayar, Andrés Aizman, Silvana Llevaneras, Luis Villarroel
BACKGROUND: Atrial fibrillation (AF) generates a hypercoagulable state with an increased thrombin generation and raised levels of thrombin-antithrombin complexes, which results in a high risk of stroke and thromboembolism. AIM: To evaluate the anticoagulant effect of rivaroxaban by anti-Xa factor activity and its correlation with thrombin-antithrombin complexes, thrombin generation and prothrombin time in patients newly diagnosed with non-valvular AF. PATIENTS AND METHODS: Prospective study in patients with indication of anticoagulation...
September 2016: Revista Médica de Chile
https://www.readbyqxmd.com/read/28052306/laboratory-monitoring-of-parenteral-direct-thrombin-inhibitors
#2
Elizabeth M Van Cott, A Joshua Roberts, William E Dager
Argatroban and bivalirudin are parenteral direct inhibitors of the activity of thrombin, but, unlike heparin, can inhibit both soluble as well as clot-bound thrombin. These agents do not require antithrombin as a cofactor for activity. The parenteral direct thrombin inhibitors (DTIs) can be used in a variety of settings, including heparin-induced thrombocytopenia (HIT) or an allergy to heparin, and patients requiring anticoagulation for an invasive cardiovascular intervention. Both agents have a relatively short half-life in patients without organ system failure and are typically administered by continuous infusion...
January 4, 2017: Seminars in Thrombosis and Hemostasis
https://www.readbyqxmd.com/read/28039291/can-recombinant-human-thrombomodulin-increase-survival-among-patients-with-severe-septic-induced-disseminated-intravascular-coagulation-a-single-centre-open-label-randomised-controlled-trial
#3
Akiyoshi Hagiwara, Noriko Tanaka, Tatsuki Uemura, Wataru Matsuda, Akio Kimura
OBJECTIVE: To determine whether treatment with recombinant human thrombomodulin (rhTM) increases survival among patients with severe septic-induced disseminated intravascular coagulation (DIC). DESIGN: Single-centre, open-label, randomised controlled trial. SETTING: Single tertiary hospital. PARTICIPANT: 92 patients with severe septic-induced DIC. INTERVENTIONS: Patients with DIC scores ≥4, as defined by the Japanese Association of Acute Medicine, were diagnosed with DIC...
December 30, 2016: BMJ Open
https://www.readbyqxmd.com/read/28038749/structure-and-anticoagulant-property-of-a-sulfated-polysaccharide-isolated-from-the-green-seaweed-monostroma-angicava
#4
Na Li, Xue Liu, Xiaoxi He, Shuyao Wang, Sujian Cao, Zheng Xia, Huali Xian, Ling Qin, Wenjun Mao
An anticoagulant-active polysaccharide PF2 was extracted with boiling water from the green seaweed Monostroma angicava, further purified by anion-exchange and size-exclusion chromatography. PF2 was a rhamnan-type sulfated polysaccharide with molecular weight of about 88.1kDa. Results of chemical and spectroscopic analyses demonstrated that PF2 consisted of→3)-α-l-Rhap-(1→ and →2)-α-l-Rhap-(1→residues, with partially branches at C-2 of→3)-α-l-Rhap-(1→residues. Sulfate groups were substituted at C-3 of →2)-α-l-Rhap-(1→ residues...
March 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28007564/structural-analysis-of-heparin-derived-3-o-sulfated-tetrasaccharides-antithrombin-binding-site-variants
#5
Yin Chen, Lei Lin, Isaac Agyekum, Xing Zhang, Kalib St Ange, Yanlei Yu, Fuming Zhang, Jian Liu, I Jonathan Amster, Robert J Linhardt
Heparin is a polysaccharide that is widely used as an anticoagulant drug. The mechanism for heparin's anticoagulant activity is primarily through its interaction with a serine protease inhibitor, antithrombin III (AT), that enhances its ability to inactivate blood coagulation serine proteases, including thrombin (factor IIa) and factor Xa. The AT-binding site in the heparin is one of the most well-studied carbohydrate-protein binding sites and its structure is the basis for the synthesis of the heparin pentasaccharide drug, fondaparinux...
December 20, 2016: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/27995727/kinetic-analysis-and-binding-studies-of-a-new-recombinant-human-factor-viia-for-treatment-of-haemophilia
#6
J Grandoni, G Perret, C Forier
INTRODUCTION/AIM: LR769 is a new second-generation recombinant human Factor VIIa (rhFVIIa) developed for haemophilia treatment. We determined enzymatic properties of LR769 and its interaction with antithrombin, tissue factor, platelets and endothelial protein C receptor (EPCR), compared with NovoSevenRT. METHODS: Kinetic enzyme assays and active site titration were used for enzymatic studies. Surface Plasmon Resonance (SPR) was used for determination of binding constants...
December 19, 2016: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/27995667/liver-dysfunction-in-women-with-pregnancy-induced-antithrombin-deficiency
#7
Mamoru Morikawa, Kosuke Kawabata, Emi Kato-Hirayama, Yasunari Oda, Hiroto Ueda, Soromon Kataoka, Takashi Yamada, Kazuhiko Okuyama, Kazuo Sengoku, Hisanori Minakami
AIM: The aim of this study was to determine whether women with pregnancy-induced antithrombin deficiency (PIATD) had higher risk of liver dysfunction in the absence of thrombocytopenia. METHODS: We carried out a retrospective observational study at five centers in all 129 women with incidentally found PIATD among 5249 maternities and 129 control women without PIATD matched for number of fetuses and gestational week at delivery. PIATD was diagnosed in women with antenatal antithrombin (AT) activities of ≤75% followed by a further decrease to ≤65% peripartum...
December 19, 2016: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/27993201/antithrombin-iii-improved-neutrophil-extracellular-traps-in-lung-after-the-onset%C3%A2-of%C3%A2-endotoxemia
#8
Michiko Ishikawa, Hayato Yamashita, Nobuki Oka, Takahiro Ueda, Keisuke Kohama, Atsunori Nakao, Joji Kotani
BACKGROUND: Coagulation and inflammation are closely linked during acute inflammatory conditions, such as sepsis. Antithrombin (AT) is an anticoagulant that also has anti-inflammatory activities. The effects of therapeutically administering AT III after the onset of endotoxemia or sepsis were not clear. Here, we studied the effects of administering AT III after inducing lethal endotoxemia in mice. METHODS: Mice were injected intraperitoneally with lipopolysaccharide (LPS) to induce endotoxemia...
February 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/27968853/predominant-mutations-in-a-hotspot-of-serpinc1-associated-with-venous-thromboembolism-in-the-chinese-population-a-case-control-study
#9
Liang Tang, Wei Zeng, Qing-Yun Wang, Mara Toderici, Maria Eugenia de la Morena-Barrio, Javier Corral, Yu Hu
BACKGROUND: Antithrombin plays a key anticoagulant role. The prevalence of antithrombin deficiency is thought to be very low in patients with thromboembolism. However, increasing evidence suggests that antithrombin deficiency may be underestimated. We aimed to uncover predominant mutations in SERPINC1 in the Chinese population. METHODS: In this case-control study, we selected individuals with venous thromboembolism from the biobank of Hubei Clinical Research Center of Thrombosis and Haemostasis in China and controls from the same area and the same time period...
October 2016: Lancet
https://www.readbyqxmd.com/read/27914214/antithrombin-improves-the-maternal-and-neonatal-outcomes-but-not-the-angiogenic-factors-in-extremely-growth-restricted-fetuses-at-28-weeks-of-gestation
#10
Midori Fujisaki, Ken Furuta, Masanao Ohhashi, Seishi Furukawa, Yuki Kodama, Yasuyuki Kawagoe, Hiroshi Sameshima, Tsuyomu Ikenoue
AIMS: Severe preterm fetal growth restriction (FGR) remote from term is problematic. We aimed to investigate the effect of maternally-administered antithrombin on maternal and neonatal outcomes. A prospective, one-arm, pilot study was performed in 14 women with severe FGR (≤5th centile) at <28 weeks of gestation, without hypertensive disorders. Maternal plasma concentrations of soluble Feline McDonough Sarcoma (FMS)-like trypsin kinase-1 (sFlt-1) and placental growth factor (PlGF) were measured and categorized into three groups: group 1; low sFlt-1 and high PlGF, group 2; moderate sFlt-1 and low PlGF, and group 3; high sFlt-1 and low PlGF...
December 3, 2016: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/27906452/primary-prophylaxis-for-venous-thromboembolism-in-ambulatory-cancer-patients-receiving-chemotherapy
#11
REVIEW
Marcello Di Nisio, Ettore Porreca, Matteo Candeloro, Michele De Tursi, Ilaria Russi, Anne Ws Rutjes
BACKGROUND: Venous thromboembolism (VTE) often complicates the clinical course of cancer. The risk is further increased by chemotherapy, but the trade-off between safety and efficacy of primary thromboprophylaxis in cancer patients treated with chemotherapy is uncertain. This is the second update of a review first published in February 2012. OBJECTIVES: To assess the efficacy and safety of primary thromboprophylaxis for VTE in ambulatory cancer patients receiving chemotherapy compared with placebo or no thromboprophylaxis...
1, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27898408/sulodexide-protects-contrast-induced-nephropathy-in-sprague-dawley-rats
#12
Qing Zhao, Jianyong Yin, Zeyuan Lu, Yiwei Kong, Guangyuan Zhang, Binghui Zhao, Feng Wang
BACKGROUND: Sulodexide is a powerful antithrombin agent with reno-protective property. However, whether it has beneficial effects on Contrast-Induced Nephropathy (CIN) remained elusive. In the current study, we evaluated the therapeutic effects of Sulodexide on CIN and investigated the potential mechanisms. METHODS: CIN model was induced by intravenous injection of indomethacin, followed by Ioversol and L-NAME. Sprague-Dawley rats were divided into 4 groups: control group, CIN group, CIN+vehicle group (CIN rats pretreated with vehicle) and CIN+ Sulodexide (CIN rats pretreated with Sulodexide)...
2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/27894965/an-application-of-mass-spectrometry-for-quality-control-of-biologicals-highly-sensitive-profiling-of-plasma-residuals-in-human-plasma-derived-immunoglobulin
#13
Franck Limonier, Katleen Van Steendam, Geneviève Waeterloos, Koen Brusselmans, Myriam Sneyers, Dieter Deforce
: Thromboembolic events (TEE) associated to trace amounts of plasmatic activated coagulation factor XI (FXIa) in administrated immunoglobulin (Ig) have recently raised concerns and hence there is a need for highly sensitive profiling of residual plasma source proteins. This study aims to consider LC-ESI-QTOF data-dependent acquisition in combination with sample fractionation for this purpose. Sample fractionation proved mandatory to enable identification of plasma residuals. Two approaches were compared: Ig depletion with protein G - protein A affinity chromatography and low-abundant protein enrichment with a combinatorial peptide ligand library (ProteoMiner™, Bio-Rad)...
January 30, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/27859427/citrate-buffered-dialysis-solution-citrasate-allows-avoidance-of-anticoagulation-during-intermittent-hemodiafiltration-at-the-cost-of-decreased-performance-and-systemic-biocompatibility
#14
Pavlina Richtrova, Jan Mares, Lukas Kielberger, Ladislav Trefil, Jaromir Eiselt, Tomas Reischig
Reportedly, citrate-based dialysis solution enables heparin dose tapering or even complete exclusion, particularly in postdilution hemodiafiltration (HDF). The aim of the study was to verify this strategy in predilution setting and to assess its short-term safety, efficacy, and biocompatibility. Ten regular hemodialysis patients were assigned to predilution HDF on acetate- and citrate-based dialysis solutions (0.8 mmol/l trisodium citrate) at random order. Acetate HDF was performed using routine dose of heparin while citrate HDF was heparin free...
November 10, 2016: Artificial Organs
https://www.readbyqxmd.com/read/27810279/synthesis-and-characterisation-of-magnetised-dacron-heparin-composite-employed-for-antithrombin-affinity-purification
#15
Aurenice Arruda Dutra das Mercês, Ricardo de Souza Silva, Karciano José Santos Silva, Jackeline da Costa Maciel, Givanildo Bezerra Oliveira, Davian Martinez Buitrago, José Albino Oliveira de Aguiar, Luiz Bezerra de Carvalho-Júnior
Human antithrombin is a blood derivative widely used in the treatment of coagulation dysfunction. Affinity chromatography using heparin (HEP) derivatives is usually used for antithrombin purification. In this study, an affinity procedure based on a magnetic Dacron-HEP composite is proposed. Dacron was firstly converted to Dacron-hydrazide and magnetised by co-precipitation with of Fe(2+)/Fe(3+) (mDAC). HEP was activated by carbodiimide and N-hydroxysuccinimide and covalently linked to mDAC (mDAC-HEP). EDX and infrared spectra analyses confirmed each synthesis step of mDAC-HEP...
December 1, 2016: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/27806995/septic-porcine-blood-does-not-further-activate-coagulation-during-in-vitro-membrane-oxygenation
#16
Christian Bleilevens, Oliver Grottke, Sabine Groening, Markus Honickel, Rüdger Kopp, Smriti Singh, Jutta Arens, Rolf Rossaint
OBJECTIVES: For patients with a severe acute respiratory distress syndrome (ARDS), extracorporeal membrane oxygenation (ECMO) represents a life-saving measure. Frequently, patients with severe ARDS also show signs of severe sepsis. As blood contact with the membrane oxygenator surface leads to adverse effects due to insufficient biocompatibility partly caused by activation of platelets, coagulation factors and leucocytes, we hypothesized that these adverse effects would be amplified if septic blood in a preactivated state came into contact with the membrane oxygenator...
November 2, 2016: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/27799851/low-molecular-weight-heparin-can-benefit-women-with-recurrent-pregnancy-loss-and-sole-protein-s-deficiency-a-historical-control-cohort-study-from-taiwan
#17
Ming-Ching Shen, Wan-Ju Wu, Po-Jen Cheng, Gwo-Chin Ma, Wen-Chu Li, Jui-Der Liou, Cheng-Shyong Chang, Wen-Hsiang Lin, Ming Chen
BACKGROUND: Heritable thrombophilias are assumed important etiologies for recurrent pregnancy loss. Unlike in the Caucasian populations, protein S and protein C deficiencies, instead of Factor V Lieden and Prothrombin mutations, are relatively common in the Han Chinese population. In this study we aimed to investigate the therapeutic effect of low molecular weight heparin upon women with recurrent pregnancy loss and documented protein S deficiency. METHODS: During 2011-2016, 68 women with recurrent pregnancy loss (RPL) and protein S deficiency (both the free antigen and function of protein S were reduced) were initially enrolled...
2016: Thrombosis Journal
https://www.readbyqxmd.com/read/27786603/effects-of-clopidogrel-therapy-on-whole-blood-platelet-aggregation-the-plateletworks%C3%A2-assay-and-coagulation-parameters-in-cats-with-asymptomatic-hypertrophic-cardiomyopathy-a-pilot-study
#18
M L den Toom, M W van Leeuwen, V Szatmári, E Teske
BACKGROUND: Although scientific evidence is limited, clopidogrel is frequently used as prophylaxis for arterial thromboembolism in cats with hypertrophic cardiomyopathy (HCM). OBJECTIVES: Evaluating effects of clopidogrel therapy in asymptomatic cats with HCM on (1) conventional whole blood aggregation (WBA), (2) alternative platelet aggregation assessed with tubes of the Plateletworks® assay and (3) standard coagulation parameters. ANIMALS AND METHODS: Prospective, randomized, double-blind, placebo-controlled pilot study...
December 2017: Veterinary Quarterly
https://www.readbyqxmd.com/read/27771726/gram-negative-pneumonia-alters-large-vein-cell-adhesion-molecule-profile-and-potentiates-experimental-stasis-venous-thrombosis
#19
Andrea T Obi, Elizabeth Andraska, Yogendra Kanthi, Catherine E Luke, Megan Elfline, Suresh Madathilparambil, Teruna J Siahaan, Farouc A Jaffer, Thomas W Wakefield, Krishnan Raghavendran, Peter K Henke
BACKGROUND/AIMS: Pneumonia is a significant risk factor for the development of venous thrombosis (VT). Cell-adhesion molecules (CAMs) are linked to the pathogenesis of both pneumonia and VT. We hypothesized that remote infection would confer a prothrombogenic milieu via systemic elevation of CAMs. METHODS: Lung injury was induced in wild-type (C57BL/6) mice by lung contusion or intratracheal inoculation with Klebsiella pneumoniae or saline controls. K. pneumoniae-treated mice and controls additionally underwent inferior vena cava (IVC) ligation to generate VT...
2016: Journal of Vascular Research
https://www.readbyqxmd.com/read/27766527/high-prevalence-of-congenital-thrombophilia-in-patients-with-pregnancy-related-or-idiopathic-venous-thromboembolism-pulmonary-embolism
#20
Makoto Ikejiri, Hideo Wada, Norikazu Yamada, Maki Nakamura, Naoki Fujimoto, Kaname Nakatani, Akimasa Matsuda, Yosihito Ogihara, Takeshi Matsumoto, Yuki Kamimoto, Tomoaki Ikeda, Naoyuki Katayama, Masaaki Ito
Congenital thrombophilia which is characterized by deficiencies in proteins such as antithrombin (AT), protein C (PC) and protein S (PS), is a major cause of venous thromboembolism (VTE). A total of 130 patients with VTE were evaluated for congenital thrombophilia based on the activity of AT, PC, or PS. Fifteen VTE patients with congenital AT deficiency (11.5 %), 16 with congenital PC deficiency (12.3 %) and eight with congenital PS deficiency (6.2 %) were diagnosed using DNA analysis. The frequency of congenital AT deficiency was significantly higher in subjects with pregnancy-related and idiopathic VTE than in those with VTE due to other causes, and congenital PC and PS deficiency were frequently associated with idiopathic VTE...
October 20, 2016: International Journal of Hematology
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