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Antithrombin

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https://www.readbyqxmd.com/read/29784539/revisiting-antithrombin-in-health-and-disease-congenital-deficiencies-and-genetic-variants-and-laboratory-studies-on-%C3%AE-and-%C3%AE-forms
#1
REVIEW
Jean Amiral, Jerard Seghatchian
Antithrombin [AT] is the main inhibitor for activated plasma coagulation serine esterases, inhibiting thrombin, Factors Xa and IXa, but also Factors XIIa, XIa, VIIa, kallicrein, and plasmin. Its activity is highly enhanced by heparin, through binding to the pentasaccharide sequences, for inhibition of all coagulation proteases, except thrombin, which inhibition requires its additional binding to the heparin polysaccharide chain. However, AT is the major inhibitor of thrombin in the blood circulation. Congenital or acquired deficiencies of AT expose affected patients to an increased risk of developing unprovoked and recurrent thrombo-embolic diseases...
April 19, 2018: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/29782332/detection-of-high-risk-thrombophilia-with-an-automated-global-test-the-coagulation-inhibitor-potential-assay
#2
Barbara Réger, Hajna Losonczy, Ágnes Nagy, Ágnes Péterfalvi, Réka Mózes, László Pótó, Nelli Farkas, Gábor L Kovács, Attila Miseta, Alizadeh Hussain, Orsolya Tóth
: The diagnosis of thrombophilia is a cost-consuming and time-consuming process, as each defect should be separately investigated. The Coagulation Inhibitor Potential (CIP) assay is a promising new global test, sensitive for most of the hereditary thrombophilias, developed for manual methodology. We adapt the original method to an optical coagulation analyser. By this automation, the test will be easier, faster and more precise, and it also allows carrying out 18 measurements simultaneously. The CIP assay was performed in 126 healthy subjects and 193 patients with different types of hereditary thrombophilia conditions...
May 17, 2018: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/29777813/polyphenolic-polysaccharide-conjugates-from-flowers-and-fruits-of-single-seeded-hawthorn-crataegus-monogyna-jacq-chemical-profiles-and-mechanisms-of-anticoagulant-activity
#3
Izabela Pawlaczyk-Graja
The polyphenolic-polysaccharide conjugates were isolated from flowers and fruits of medicinal plant Crataegus monogyna Jacq. (Lindm.) by the alkaline extraction, followed by neutralization, partitioning with organic solvents and dialysis against water. The isolates from flowers as well as from fruits were homogenous macromolecular compounds, with a molecular weight over 760 × 103  g/mol and 970 × 103  g/mol, respectively, what was assessed in HPGPC analysis. Both products were characterized spectrophotometrically, and by GLC-MS, FT-IR and NMR techniques...
May 16, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29769259/novel-therapeutics-for-hemophilia-and-other-bleeding-disorders
#4
Michael U Callaghan, Robert Sidonio, Steven W Pipe
Hemophilia and von Willebrand disease are the most common congenital bleeding disorders. Treatment for these disorders has focused on replacement of the missing coagulation factor to prevent or treat bleeding. New technologies and insights into hemostasis have driven the development of many promising new therapies for hemophilia and von Willebrand disease. Emerging bypass agents including zymogen-like factor IXa and Xa molecules are in development and a bispecific antibody, emicizumab, demonstrated efficacy in a phase III trial in people with hemophilia A and inhibitors...
May 16, 2018: Blood
https://www.readbyqxmd.com/read/29769125/observational-study-of-coagulation-activation-in-early-breast-cancer-development-of-a-prognostic-model-based-on-data-from-the-real-world-setting
#5
Chiara Mandoj, Laura Pizzuti, Domenico Sergi, Isabella Sperduti, Marco Mazzotta, Luigi Di Lauro, Antonella Amodio, Silvia Carpano, Anna Di Benedetto, Claudio Botti, Francesca Ferranti, Anna Antenucci, Maria Gabriella D'Alessandro, Paolo Marchetti, Silverio Tomao, Giuseppe Sanguineti, Antonio Giordano, Marcello Maugeri-Saccà, Gennaro Ciliberto, Laura Conti, Patrizia Vici, Maddalena Barba
BACKGROUND: Cancer and coagulation activation are tightly related. The extent to which factors related to both these pathologic conditions concur to patient prognosis intensely animates the inherent research areas. The study herein presented aimed to the development of a tool for the assessment and stratification of risk of death and disease recurrence in early breast cancer. METHODS: Between 2008 and 2010, two hundreds thirty-five (N: 235) patients diagnosed with stage I-IIA breast cancer were included...
May 16, 2018: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29765291/the-potential-close-future-of-hemophilia-treatment-gene-therapy-tfpi-inhibition-antithrombin-silencing-and-mimicking-factor-viii-with-an-engineered-antibody
#6
REVIEW
Wolfgang Korte, Lukas Graf
Summary Hemophilia is one of the best researched monogenic diseases. Hemophilia A will affect approximately 1:5,000 male live births. In recent decades, great progress has been made with the introduction of recombinant proteins in the 1990s for therapy and prophylaxis, securing adequate availability and, with the introduction of the prophylaxis concept, reducing the negative impact of hemophilia on morbidity (especially arthropathy). Despite this progress, there are still challenges to overcome to secure adequate prophylaxis and treatment: for the time being, causal pharmacological hemophilia prophylaxis and therapy requires repeated i...
April 2018: Transfusion Medicine and Hemotherapy
https://www.readbyqxmd.com/read/29761839/effects-of-plasma-transfusions-on-antithrombin-levels-after-paediatric-liver-transplantation
#7
D Arni, B E Wildhaber, V McLin, P C Rimensberger, M Ansari, P Fontana, O Karam
BACKGROUND AND OBJECTIVES: Thrombotic complications affect 3-10% of patients after liver transplantation (LT), leading to potentially life-threatening complications. In the days following LT, antithrombin (AT) is decreased longer than pro-coagulant factors, thus favouring a pro-thrombotic profile. Plasma transfusions are given empirically in some centres to correct AT levels following LT. We assessed the effect of plasma transfusion on AT levels after paediatric LT. MATERIALS AND METHODS: Prospective single-centre observational study in 20 consecutive paediatric LT recipients over a 24-month period...
May 15, 2018: Vox Sanguinis
https://www.readbyqxmd.com/read/29747524/congenital-thrombophilia-in-patients-with-superior-mesenteric-venous-thrombosis-or-portal-vein-thrombosis
#8
Ikejiri Makoto, Masanobu Usui, Hideo Wada, Takeshi Matsumoto, Kohshi Ohishi, Akihiro Shindo, Yoshiki Yamashita, Kaname Nakatani, Shigehisa Tamaki, Hidekazu Tomimoto, Shuji Isaji
We explored the relationship between abdominal vein thromboses, including portal vein thrombosis (PVT) and superior mesenteric vein thrombosis (SMVT), and thrombophilia. The frequency of thrombophilia, such as antithrombin (AT), protein C (PC), or protein S (PS) gene mutations, was examined in 21 patients with PVT, 6 patients with SMVT, and 6 patients with both PVT and SMVT. Low levels of AT, PC, or PS were frequently detected in patients with PVT or mesenteric vein thrombosis, and 4 mutations in the PS gene, 3 mutations in the PC gene, and 2 mutations in AT the gene were detected...
January 1, 2018: Clinical and Applied Thrombosis/hemostasis
https://www.readbyqxmd.com/read/29746945/activation-of-coagulation-and-endothelium-with-concurrent-impairment-of-anticoagulant-mechanisms-in-patients-with-typhoid-fever
#9
Hanna K de Jong, Chris M Parry, Thomas W van der Vaart, Liesbeth M Kager, Stannie J van den Ende, Rapeephan R Maude, Lalith Wijedoru, Aniruddha Ghose, Mohammed U Hasan, Mohammed A Hossain, Arjan M Dondorp, Steve Baker, M Abul Faiz, Joost C M Meijers, W Joost Wiersinga
OBJECTIVES: Typhoid fever caused by Salmonella Typhi remains a major burden worldwide. Gastrointestinal bleeding can be seen in up to 10 percent of patients and may be fatal. The coagulopathy, which may be the driver of this severe complication in patients with typhoid fever, however is ill defined. The aim of this study was to evaluate the activation of coagulation, anticoagulation, and fibrinolysis in patients with acute typhoid fever. METHODS: . Parameters of coagulation and fibrinolysis were measured in 28 hospitalized patients with culture-confirmed or PCR-confirmed typhoid fever and compared to 38 age- and sex-matched healthy volunteers...
May 7, 2018: Journal of Infection
https://www.readbyqxmd.com/read/29746315/antithrombin-during-extracorporeal-membrane-oxygenation-in-adults-national-survey-and-retrospective-analysis
#10
Giacomo E Iapichino, Alessandro Protti, Davide T Andreis, Mauro Panigada, Andrea Artoni, Cristina Novembrino, Antonio Pesenti, Luciano Gattinoni
The impact of antithrombin replacement during extracorporeal membrane oxygenation (ECMO) in adults remains unclear. This work comprises a survey, showing that antithrombin is routinely supplemented in many Italian ECMO-Centers, and a retrospective analysis on 66 adults treated with veno-venous ECMO and unfractionated heparin at our Institution. Twenty-four to 72 h after the beginning of ECMO, antithrombin activity was ≤70% in 47/66 subjects and activated partial thromboplastin time (aPTT) ratio was <1...
May 8, 2018: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29737537/genetic-polymorphisms-in-the-fvii-gene-is-associated-with-lower-extremity-deep-venous-thrombosis-a-case-control-study
#11
Jian-Wei Liu, Dong-Qiong Chen
This study aims to explore the associations between FVII gene polymorphisms (R353Q, 5'F7, and -402G/A) and lower extremity deep venous thrombosis (LEDVT) in a Chinese Han population. LEDVT patients (153) and healthy people (174) were, respectively, as case and control groups and evaluated related biochemical indicators. Gene polymorphisms of R353Q, 5'F7, and -402G/A of FVII, serum FVII level, antithrombin activity, plasma fibrinogen content, and plasma D-dimer (D-D) level were determined by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP), ELISA, chromogenic substrate assay, coagulating assay, and Immunoturbidimetry assay, respectively...
May 8, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29733637/anticoagulant-properties-of-poly-sodium-2-acrylamido-2-methylpropanesulfonate-based-di-and-triblock-polymers
#12
Bartlomiej Kalaska, Kamil Kamiński, Joanna Miklosz, Keita Nakai, Shin-Ichi Yusa, Dariusz Pawlak, Maria Nowakowska, Andrzej Mogielnicki, Krzysztof Szczubiałka
Di- and triblock copolymers with low dispersity of molecular weight were synthesized using radical addition-fragmentation chain transfer polymerization. The copolymers contained anionic poly(sodium 2-acrylamido-2-methylpropanesulfonate) (PAMPS) block as an anticoagulant component. The block added to lower the toxicity was either poly(ethylene glycol) (PEG) or poly(2-(methacryloyloxy)ethyl phosphorylcholine) (PMPC). The polymers prolonged clotting times both in vitro and in vivo. The influence of the polymer architecture and composition on the efficacy of anticoagulation and safety parameters was evaluated...
May 7, 2018: Biomacromolecules
https://www.readbyqxmd.com/read/29725383/therapeutic-effect-of-radiofrequency-ablation-on-children-with-supraventricular-tachycardia-and-the-risk-factors-for-postoperative-recurrence
#13
Chunli Li, Libo Jia, Zhenzhou Wang, Ling Niu, Xinjiang An
The present study investigated the therapeutic effect of radiofrequency ablation on children with supraventricular tachycardia (SVT), and explored the risk factors for postoperative recurrence. A total of 312 patients with pediatric SVT were selected in the Affiliated Children's Hospital of Xuzhou Medical University from April, 2011 to March, 2017. All the patients were subjected to radiofrequency ablation, and clinical data were retrospectively analyzed. Tilt table test was performed before and after treatment, and heart rate, systolic and diastolic blood pressure before and after treatment were compared...
May 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29724819/establishing-the-transient-mass-balance-of-thrombosis-from-tissue-factor-to-thrombin-to-fibrin-under-venous-flow
#14
Shu Zhu, Jason Chen, Scott L Diamond
OBJECTIVE: We investigated the coregulation of thrombin and fibrin as blood flows over a procoagulant surface. APPROACH AND RESULTS: Using microfluidic perfusion of factor XIIa-inhibited human whole blood (200 s- 1 wall shear rate) over a 250-μ long patch of collagen/TF (tissue factor; ≈1 molecule per μm2 ) and immunoassays of the effluent for F1.2 (prothrombin fragment 1.2), TAT (thrombin-antithrombin complex), and D-dimer (post-end point plasmin digest), we sought to establish the transient mass balance for clotting under venous flow...
May 3, 2018: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/29720864/role-of-thrombophilia-in-splanchnic-venous-thrombosis-in-acute-pancreatitis
#15
Sobur Uddin Ahmed, Surinder S Rana, Jasmina Ahluwalia, Neelam Varma, Ravi Sharma, Rajesh Gupta, Mandeep Kang
Background: Splanchnic venous thrombosis (SVT) is a common vascular complication of acute pancreatitis (AP). We conducted this study to prospectively investigate the frequency, risk factors, and extent of SVT in patients with AP and to evaluate the role of thrombophilia in its causation. Methods: Patients with AP presenting between January 2015 and June 2016 were prospectively evaluated with contrast-enhanced computed tomography (CT) for the presence of SVT. These patients underwent a detailed analysis of coagulation parameters...
May 2018: Annals of Gastroenterology: Quarterly Publication of the Hellenic Society of Gastroenterology
https://www.readbyqxmd.com/read/29720054/newly-proposed-sepsis-induced-coagulopathy-precedes-international-society-on-thrombosis-and-haemostasis-overt-disseminated-intravascular-coagulation-and-predicts-high-mortality
#16
Toshiaki Iba, Makoto Arakawa, Marcello Di Nisio, Satoshi Gando, Hideaki Anan, Koichi Sato, Yutaka Ueki, Jerrold H Levy, Jecko Thachil
BACKGROUND: Disseminated intravascular coagulation (DIC) has been recognized as an urgent and critical condition in patients with sepsis. Therefore, unfamiliar and time-consuming tests or a complex scoring system are not suitable for diagnosis. Sepsis-induced coagulopathy (SIC), a newly proposed category delineated by a few global coagulation tests, has been established as an early warning sign for DIC. The purpose of this study was to elucidate the characteristics of SIC, especially in relation to the score of the International Society on Thrombosis and Haemostasis (ISTH) for overt DIC...
January 1, 2018: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/29708897/conservative-management-of-neonatal-cerebral-sinovenous-thrombosis-with-coexisting-thrombophilia
#17
Vidushi Khatri, Anthony K C Chan, Nina Stein, Bosco Paes, Mihir Bhatt
: Neonatal cerebral sinovenous thrombosis (CSVT) comprises approximately 50% of all pediatric-related CSVT. Although guidelines support anticoagulation in pediatric CSVT, the role of anticoagulation in neonatal CSVT remains controversial. This case report details the course of a neonate diagnosed with extensive CSVT and concurrent bilateral thalamic and intraventricular hemorrhage. Due to existing hemorrhage at the time of diagnosis, anticoagulation therapy was not administered. Despite coexisting protein C and antithrombin deficiency, CSVT resolved spontaneously, and neurodevelopmental follow-up after 13 years suggests a good prognosis...
April 27, 2018: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/29708875/detecting-molecular-forms-of-antithrombin-by-lc-mrm-ms-defining-the-measurands
#18
L Renee Ruhaak, Fred P H T M Romijn, Nico P M Smit, Arnoud van der Laarse, Mervin M Pieterse, Moniek P M de Maat, Fred J L M Haas, Cornelis Kluft, Jean Amiral, Piet Meijer, Christa M Cobbaert
BACKGROUND: Antithrombin (AT) is a critical regulator of coagulation, and its overall activity is typically measured using functional tests. A large number of molecular forms of AT have been identified and each individual carries multiple molecular proteoforms representing variable activities. Conventional functional tests are completely blind for these proteoforms. A method that ensures properly defined measurands for AT is therefore needed. We here assess whether mass spectrometry technology, in particular multiple reaction monitoring (MRM), is suitable for the quantification of AT and the qualitative detection of its molecular proteoforms...
May 1, 2018: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/29704446/decreased-protein-c-function-predicts-mortality-in-patients-with-cirrhosis
#19
A G Patil, C Bihari, H D Shewade, N Nigam, S K Sarin
INTRODUCTION: Protein C (PrC), a physiological anticoagulant, regulates inflammation and cell death and has known predictive/therapeutic roles in sepsis. Accumulating evidences suggest plasma hypercoagulability results in progression of fibrosis and formation of microclots causing end-organ dysfunction. We investigated a possible association between natural anticoagulants-PrC, protein S (PrS) and antithrombin III (AT)-and clinical outcomes in cirrhotics. METHODS: Functional PrC, PrS and AT were analysed in 515 cirrhotic patients and compared with 229 noncirrhotics...
April 28, 2018: International Journal of Laboratory Hematology
https://www.readbyqxmd.com/read/29701427/heparin-resistance-during-surgical-resection-of-inferior-vena-cava-and-right-atrial-tumor-thrombus-a-case-report
#20
Maria Beatriz Bello Dias, J Mendes, J Gouveia, C Pestana, J Bismarck
Heparin resistance is the failure of unusually high doses of heparin to achieve a target activated clotting time (ACT). We present the case of a 47-year-old female patient, ASA 2, who was diagnosed with a neuroendocrine retroperitoneal tumor with thrombus in the left renal vein, inferior vena cava and right atrium. General and cardiothoracic surgeons collaborated to remove the tumor under cardiopulmonary bypass. Heparin resistance was considered and treated with 1000 UI of antithrombin III concentrate. The authors review the mechanisms and management of this entity...
July 2017: Revista Portuguesa de Cirurgia Cardio-torácica e Vascular
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