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Antithrombin 3

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https://www.readbyqxmd.com/read/28229161/high-levels-of-latent-antithrombin-in-plasma-from-patients-with-antithrombin-deficiency
#1
María de la Morena-Barrio, Edna Sandoval, Pilar Llamas, Ewa Wypasek, Mara Toderici, José Navarro-Fernández, Agustín Rodríguez-Alen, Nuria Revilla, Raquel López-Gálvez, Antonia Miñano, José Padilla, Belén de la Morena-Barrio, Jorge Cuesta, Javier Corral, Vincente Vincente
Antithrombin is an anticoagulant serpin that efficiently inhibits multiple procoagulant proteases. The cost for the structural flexibility required for this function is the vulnerability to mutations that impact its folding pathway. Most conformational mutations identified in serpins cause polymerisation. Only three mutations in SERPINC1 affecting two residues have been found to favour transformation to the latent conformation of antithrombin, another hyperstable non-anticoagulant form with strong antiangiogenic activity that constitutes 3 % of plasma antithrombin in healthy subjects...
February 23, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28226363/coagulation-profile-in-patients-with-different-etiologies-for-cushing-syndrome-a-prospective-observational-study
#2
Amit Tirosh, Maya Lodish, Charalampos Lyssikatos, Elena Belyavskaya, Richard A Feelders, Constantine A Stratakis
Previous studies reported a higher prevalence of venous-thromboembolic events among patients with Cushing disease (CD) compared to those with ACTH-independent Cushing syndrome (CS) from adrenal sources. The objective of the current study was to evaluate the coagulation profile of patients with CS from different etiologies. A prospective observational study was conducted at a clinical research center. The study included adult patients admitted for evaluation of suspected CS (n=85), that were divided into 3 groups: CD (n=22), ACTH-independent CS from an adrenal tumor/hyperplasia (adrenal CS, n=21), and a control group consisting of subjects with negative screening for CS (rule-out CS, n=42)...
February 22, 2017: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
https://www.readbyqxmd.com/read/28220452/antithrombin-use-and-28-day-in-hospital-mortality-among-severe-burn-patients-an-observational-nationwide-study
#3
Takashi Tagami, Hiroki Matsui, Yuuta Moroe, Reo Fukuda, Ami Shibata, Chie Tanaka, Kyoko Unemoto, Kiyohide Fushimi, Hideo Yasunaga
BACKGROUND: Previous studies have suggested that antithrombin may be beneficial for treating coagulopathy in patients with severe burns. However, robust evidence for this idea is lacking. We examined the hypothesis that antithrombin may be effective in treating patients with severe burns. METHODS: We performed propensity score-matched analyses of the nationwide administrative Japanese Diagnosis Procedure Combination inpatient database. We identified patients with severe burns (burn index ≥ 10) who were recorded in the database from 1 July 2010 to 31 March 2013...
December 2017: Annals of Intensive Care
https://www.readbyqxmd.com/read/28197274/early-changes-in-the-antithrombin-and-thrombin-antithrombin-complex-in-patients-with-paroxysmal-atrial-fibrillation
#4
Mariya Negreva, Svetoslav Georgiev, Krasimira Prodanova, Julia Nikolova
BACKGROUND: Data on coagulation changes in paroxysmal atrial fibrillation (PAF) are scarce. The aim of this study was to examine plasma antithrombin (AT) levels and activity as well as thrombin-antithrombin (TAT) complex levels in the early hours of the clinical manifestation of PAF. METHODS: Fifty-one patients (26 men and 25 women; mean age 59.84 ± 1.60 years) were consecutively selected with PAF duration < 24 hours, and 52 controls (26 men and 26 women; mean age 59...
June 2016: Cardiology Research
https://www.readbyqxmd.com/read/28196919/estimates-of-within-subject-biological-variation-of-protein-c-antithrombin-protein-s-free-protein-s-activity-and-activated-protein-c-resistance-in-pregnant-women
#5
Ann H Kristoffersen, Per H Petersen, Thomas R Raas, Sverre Sandberg
BACKGROUND: In pregnancy, interpretation of results from coagulation parameters can be difficult because of the procoagulant physiological changes. The aim of this study was to describe the course of 5 coagulation parameters (thrombophilia markers) in healthy pregnancies, and to estimate and compare the within-subject biological variation (CVI) of these parameters in healthy pregnant and nonpregnant women. METHODS: Blood samples were obtained every 4th week during pregnancy and 3 samples after delivery in 20 healthy women and every 4th week during 40 weeks in 19 healthy nonpregnant women...
February 14, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/28174134/whole-exome-sequencing-reveals-severe-thrombophilia-in-acute-unprovoked-idiopathic-fatal-pulmonary-embolism
#6
Matt Halvorsen, Ying Lin, Barbara A Sampson, Dawei Wang, Bo Zhou, Lucy S Eng, Sung Yon Um, Orrin Devinsky, David B Goldstein, Yingying Tang
BACKGROUND: Acute unprovoked idiopathic fatal pulmonary embolism (IFPE) causes sudden death without an identifiable thrombogenic risk. We aimed to investigate the underlying genomic risks of IFPE through whole exome sequencing (WES). METHODS: We reviewed 14years of consecutive out-of-hospital fatal pulmonary embolism records (n=1478) from the ethnically diverse population of New York City. We selected 68 qualifying IFPE cases for WES. We compared the WES data of IFPE cases to those of 9332 controls to determine if there is an excess of rare damaging variants in the genome using ethnicity-matched controls in collapsing analyses...
January 31, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28164577/clinical-and-experimental-analysis-of-platelet-micro-particles-inducing-thrombosis-after-coronary-stenting
#7
Muyesai Nijiati, Abulijiang Saidaming, Adelijiang Tuohuti, Li Guoqing, Du Rong
BACKGROUND: A limited number of reports are analyzing the etiology and the mechanism of coronary heart disease by examining the source cells of micro particles (MPs) in coronary heart disease patients with percutaneous coronary intervention (PCI). This study aims to explore the circulating platelet micro particles (PMPs) content variation in the blood stream and the mechanism of MPs-inducing thrombosis in patients operated with coronary stenting, with the intent to analyze the impact of PMPs on thrombosis and in-stent restenosis...
September 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28150310/plasma-treated-with-amotosalen-and-ultraviolet-a-light-retains-activity-for-hemostasis-after-5-days-post-thaw-storage-at-1-to-6-o-c
#8
Anna Erickson, Katie Waldhaus, Tovo David, Norman Huang, Salvador Rico, Laurence Corash, Nina Mufti, Richard J Benjamin
BACKGROUND: Plasma thawed and stored at 1 to 6(°) C for up to 5 days (thawed plasma [TP]) provides rapid availability in emergencies and reduces plasma waste, but it carries risks of coagulation factor loss or activation, bacterial outgrowth, and viral contamination. We characterized changes in amotosalen/ultraviolet A (UVA) light pathogen-reduced, fresh-frozen plasma (FFP) and plasma frozen within 24 hours (PF24) with post-thaw storage. STUDY DESIGN AND METHODS: Amotosalen/UVA light-treated FFP and PF24 were thawed after approximately 3 to more than 12 months of frozen storage and held at 1 to 6(°) C for 5 days...
February 1, 2017: Transfusion
https://www.readbyqxmd.com/read/28134019/superficial-vein-thrombosis-in-non-varicose-veins-of-the-lower-limbs-and-thrombophilia
#9
Gabriella Lucchi, Salvino Bilancini, Sandro Tucci, Massimo Lucchi
Objectives Superficial vein thrombosis in non-varicose veins of the lower limbs is rather frequent and may be underestimated. This study aims to evaluate the prevalence of inherited or acquired thrombophilia in a sample of outpatients with the disease. Method An observational study was conducted on 73 consecutive superficial vein thrombosis patients tested for inherited or acquired thrombophilia. Results Sixty of 73 patients with superficial vein thrombosis completed the testing protocol, while 13 dropped out; 46 of 60 patients were found to have a thrombophilia (76...
January 1, 2017: Phlebology
https://www.readbyqxmd.com/read/28121368/pharmacokinetics-and-pharmacodynamics-of-single-doses-of-rivaroxaban-in-obese-patients-before-and-after-bariatric-surgery
#10
Dino Kröll, Guido Stirnimann, Andreas Vogt, Desirée Lin Lee Lai, Yves Michael Borbély, Julia Altmeier, Sabine Schädelin, Daniel Candinas, Lorenzo Alberio, Philipp C Nett
AIMS: Venous thromboembolism is an important cause of postoperative morbidity and mortality in bariatric surgery. Studies of direct oral anticoagulants (DOACs) are not available in this surgical field. The objective of this phase 1 clinical trial was to investigate pharmacokinetic and pharmacodynamic (PK/PD) parameters of rivaroxaban in bariatric patients. METHODS: In this single-centre study, obese patients received single oral doses of rivaroxaban (10 mg) one day before and three days after bariatric surgery...
January 25, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28106177/construction-and-characterisation-of-a-heparan-sulphate-heptasaccharide-microarray
#11
Jianhong Yang, Po-Hung Hsieh, Xinyue Liu, Wen Zhou, Xing Zhang, Jing Zhao, Yongmei Xu, Fuming Zhang, Robert J Linhardt, Jian Liu
A targeted heptasaccharide library was synthesised to prepare a heparan sulphate (HS) microarray. The array was probed with two glycan-binding proteins, HS 3-O-sulphotransferase 1 and antithrombin, demonstrating the binding selectivity between HS and proteins. The HS microarray technique will accelerate the understanding of the structure and function relationships of HS.
January 20, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28060970/-evaluation-of-oral-anticoagulation-with-rivaroxaban-in-patients-with-new-onset-non-valvular-atrial-fibrillation
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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