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https://www.readbyqxmd.com/read/28340300/synthesis-of-3-o-sulfated-oligosaccharides-to-understand-the-relationship-between-structures-and-functions-of-heparan-sulfate
#1
Zhangjie Wang, Po-Hung Hsieh, Yongmei Xu, David Thieker, Evangeline Juan En Chai, Shaoshuai Xie, Brian Cooley, Robert Woods, Lianli Chi, Jian Liu
The sulfation at the 3-OH position of glucosamine is an important modification in forming structural domains for heparan sulfate to enable its biological functions. Seven 3-O-sulfotransferase isoforms in the human genome are involved in the biosynthesis of 3-O-sulfated heparan sulfate. As a rare modification present in heparan sulfate, the availability of 3-O-sulfated oligosaccharides is very limited. Here, we report the use of a chemoenzymatic synthetic approach to synthesize six 3-O-sulfated oligosaccharides, including three hexasaccharides and three octasaccharides...
March 24, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28335566/profiling-and-preparation-of-metabolites-from-pyragrel-in-human-urine-by-online-solid-phase-extraction-coupled-with-high-performance-liquid-chromatography-tandem-mass-spectrometry-followed-by-a-macroporous-resin-based-purification-approach
#2
Xin Zhao, Jingjing Jiang, Guang Yang, Jie Huang, Guoping Yang, Guangwei He, Zhaoxing Chu, Taijun Hang, Guorong Fan
Pyragrel, a new anticoagulant drug, is derived from the molecular combination of ligustrazine and ferulic acid. Pyragrel showed significant inhibitory activity against platelet aggregation induced by adenosine diphosphate (ADP), and had been approved for a phase I clinical trial by CFDA. To characterize the metabolites of Pyragrel in human urine after intravenous administration, a reliable online solid-phase extraction couple with high performance liquid chromatography tandem mass spectrometry (online SPE-HPLC-MS(n)) method was conceived and applied...
March 21, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28330690/subclinical-leaflet-thrombosis-in-surgical-and-transcatheter-bioprosthetic-aortic-valves-an-observational-study
#3
Tarun Chakravarty, Lars Søndergaard, John Friedman, Ole De Backer, Daniel Berman, Klaus F Kofoed, Hasan Jilaihawi, Takahiro Shiota, Yigal Abramowitz, Troels H Jørgensen, Tanya Rami, Sharjeel Israr, Gregory Fontana, Martina de Knegt, Andreas Fuchs, Patrick Lyden, Alfredo Trento, Deepak L Bhatt, Martin B Leon, Raj R Makkar
BACKGROUND: Subclinical leaflet thrombosis of bioprosthetic aortic valves after transcatheter valve replacement (TAVR) and surgical aortic valve replacement (SAVR) has been found with CT imaging. The objective of this study was to report the prevalence of subclinical leaflet thrombosis in surgical and transcatheter aortic valves and the effect of novel oral anticoagulants (NOACs) on the subclinical leaflet thrombosis and subsequent valve haemodynamics and clinical outcomes on the basis of two registries of patients who had CT imaging done after TAVR or SAVR...
March 19, 2017: Lancet
https://www.readbyqxmd.com/read/28327887/oral-anticoagulation-in-primary-care
#4
J Altirriba, P Aparicio
Oral anticoagulant therapy is currently widespread in the population and primary care plays an important role in its control in Spain. Younger populations, such as those in prisons, often require this treatment for reasons other than atrial fibrillation, often in relation to valvular or congenital or acquired hypercoagulability situations. The possibility of obtaining the INR by portable coagulometers has allowed primary care physicians to tackle the indication of this therapy and the control of these patients in coordination with haematology services...
June 2017: Revista Española de Sanidad Penitenciaria
https://www.readbyqxmd.com/read/28326589/risk-of-myocardial-infarction-in-patients-with-atrial-fibrillation-using-vitamin-k-antagonists-aspirin-or-direct-acting-oral-anticoagulants
#5
Leo M Stolk, Frank de Vries, Chiel Ebbelaar, Anthonius de Boer, Tom Schalekamp, Patrick Souverein, Arina Ten Cate-Hoek, Andrea M Burden
AIM: Direct-acting oral anticoagulants (DOACs) have become available for the prevention of stroke in patients with atrial fibrillation (AF). Conflicting results have been published on the risk of acute myocardial infarction (AMI) with the use of DOACs in comparison with vitamin K antagonists (VKAs). The objective of the present study was to evaluate the risk of AMI in patients with AF who are exposed to either VKAs, DOACs or low-dose (< 325 mg) aspirin. METHODS: We conducted a population-based cohort study using data from the Clinical Practice Research Datalink (2008-2014)...
March 22, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28325458/chronic-subdural-hematoma-icu-management
#6
REVIEW
Jeremy T Ragland, Kiwon Lee
Patients with cSDH presenting with new or worsening neurological deficits, especially if they are debilitating and adversely affecting quality of life require urgent medical and surgical attention. Neurological and neurosurgical critical care team need to stabilize the patient by reversing any underlying coagulopathy states in order to prevent further hematoma expansion.In the event of brain herniation and presumed ICP elevation and CPP compromise, step-wise ICP management should be instituted promptly.Seizure prophylaxis treatment is reasonable...
April 2017: Neurosurgery Clinics of North America
https://www.readbyqxmd.com/read/28324091/association-between-dabigatran-vs-warfarin-and-risk-of-osteoporotic-fractures-among-patients-with-nonvalvular-atrial-fibrillation
#7
Wallis C Y Lau, Esther W Chan, Ching-Lung Cheung, Chor Wing Sing, Kenneth K C Man, Gregory Y H Lip, Chung-Wah Siu, Joanne K Y Lam, Alan C H Lee, Ian C K Wong
Importance: The risk of osteoporotic fracture with dabigatran use in patients with nonvalvular atrial fibrillation (NVAF) is unknown. Objective: To investigate the risk of osteoporotic fracture with dabigatran vs warfarin in patients with NVAF. Design, Setting, and Participants: Retrospective cohort study using a population-wide database managed by the Hong Kong Hospital Authority. Patients newly diagnosed with NVAF from 2010 through 2014 and prescribed dabigatran or warfarin were matched by propensity score at a 1:2 ratio with follow-up until July 31, 2016...
March 21, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28321560/may-thurner-syndrome-old-acquaintance-new-perspective-case-report
#8
Anja Boc, Vinko Boc, Matija Kozak
May-Thurner syndrome (MTS) results from a frequent anatomic variant in which compression of the left common iliac vein between the body of the fifth lumbar vertebra and the pulsating right common iliac artery can cause deep venous thrombosis (DVT) of the left lower limb. While anticoagulation remains the mainstay treatment of acute DVT, catheter-directed thrombolysis combined with stenting provides a safe and effective method for relieving acute symptoms and preventing postthrombotic syndrome in patients with MTS...
March 20, 2017: Wiener Klinische Wochenschrift
https://www.readbyqxmd.com/read/28316437/a-comparative-study-showing-the-potency-of-anti-c3d-and-anti-immunoglobulin-g-in-polyspecific-anti-human-globulin-using-fresh-and-cryopreserved-red-blood-cells
#9
Kanchan Ahuja, Ranjan Kumar Satapathy, Garima Gulati, Surinder Singh
BACKGROUND: The antiglobulin test is used to determine red blood cells (RBCs) having surface-bound immunoglobulin G (IgG) and/or complement (C3b, C3d, C4b, and C4d) free in serum or attached to antigens on RBCs. In such circumstances, the quality of the anti-human globulin (AHG) which is used in routine cross-match/indirect agglutination test plays a vital role in blood transfusion medicine. For potency testing of polyspecific AHG, it is recommended by the Food and Drug Administration and the Centre for Biologics Evaluation and Research to use fresh O +ve RBCs within 1 hr of collection for sensitization with anti-C3d...
January 2017: Asian Journal of Transfusion Science
https://www.readbyqxmd.com/read/28314985/the-role-of-new-oral-anticoagulants-in-orthopaedics-an-update-of-recent-evidence
#10
REVIEW
Dimitrios V Papadopoulos, Ioannis Kostas-Agnantis, Ioannis Gkiatas, Andreas G Tsantes, Panagiota Ziara, Anastasios V Korompilias
Rivaroxaban, dabigatran, apixaban and edoxaban are the four available new oral anticoagulants (NOAC) which are currently approved for venous thromboembolism prophylaxis after total hip and knee replacement. Large phase 3 and phase 4 studies comparing NOAC with low molecular weight heparins have shown similar results regarding the efficacy and safety of these two categories of anticoagulants. Management of bleeding complications is a matter of great significance. Three reversal agents have been developed: idarucizumab, andexanet alfa and ciraparantag...
March 17, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28303970/transient-desialylation-in-combination-with-a-novel-antithrombin-deficiency-causing-a-severe-and-recurrent-thrombosis-despite-anticoagulation-therapy
#11
Nuria Revilla, María Eugenia de la Morena-Barrio, Antonia Miñano, Raquel López-Gálvez, Mara Toderici, José Padilla, Ángel García-Avello, María Luisa Lozano, Dirk J Lefeber, Javier Corral, Vicente Vicente
An in-depth focused study of specific cases of patients with recurrent thrombosis may help to identify novel circumstances, genetic and acquired factors contributing to the development of this disorder. The aim of this study was to carry out a detailed and sequential analysis of samples from a patient suffering from early and recurrent venous and arterial thrombosis. We performed thrombophilic tests, biochemical, functional, genetic and glycomic analysis of antithrombin and other plasma proteins. The patient carried a new type I antithrombin mutation (p...
March 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28302715/late-thrombosis-of-a-mitral-bioprosthetic-valve-with-associated-massive-left-atrial-thrombus
#12
Preetham Muskula, Rigoberto Ramirez, A Michael Borkon, Michael L Main
An 84-year-old man presented 5 years following bioprosthetic mitral valve replacement with three months of worsening dyspnea on exertion. A new mitral stenosis murmur was noted on physical examination, and an electrocardiogram revealed newly recognized atrial fibrillation. Severe mitral stenosis (mean gradient = 13 mmHg) was confirmed by transthoracic echocardiography. Transesophageal echocardiography revealed markedly thickened mitral bioprosthetic leaflets with limited mobility, and a massive left atrial thrombus (> 4 cm in diameter) (see Figures 1A-D, and video files 1-4)...
March 16, 2017: Echo Research and Practice
https://www.readbyqxmd.com/read/28301908/identification-of-cost-saving-opportunities-for-the-use-of-antithrombin-iii-in-adult-and-pediatric-patients
#13
Alana Ciolek, John Lindsley, Jessica Crow, Kristen Nelson-McMillan, David Procaccini
Thrombate III is a human plasma-derived antithrombin III (AT-III) often utilized in patients on extracorporeal membrane oxygenation (ECMO) with suspected AT-III-mediated heparin resistance. It is supplied as 500-U and 1000-U vials, costing US$4.66 per unit. Literature is limited in describing the clinical value of AT-III in relation to its high cost. The primary objective was to determine conditions of use and associated cost of potentially unnecessary utilization of AT-III at The Johns Hopkins Hospital. Secondary objectives included evaluating the effect of AT-III on anticoagulation parameters and the overall cost utilized and wasted on AT-III...
January 1, 2017: Clinical and Applied Thrombosis/hemostasis
https://www.readbyqxmd.com/read/28298666/bivalirudin-as-an-alternative-anticoagulant-for-cardiopulmonary-bypass-during-adult-cardiac-surgery-a-change-in-practice
#14
Peter Gatt, Samuel Anthony Galea, Walter Busuttil, Charles Grima, Jeffrey Muscat, Yvette Farrugia
The referral of patients for open heart surgery, presenting with a history of heparin hypersensitivity instigated a multidisciplinary effort to find an alternative anticoagulant to heparin. The various options mentioned in the literature call for changes in the routine practice of open heart surgery on cardiopulmonary bypass. These changes involve mostly the perfusion setup and conduct on bypass and to a lesser extent the anesthetic and surgical practice. Nevertheless, the different professions involved in the cardiac surgical firm discussed the proposed changes in a multidisciplinary effort...
March 2017: Journal of Extra-corporeal Technology
https://www.readbyqxmd.com/read/28296630/effective-prevention-for-portal-venous-system-thrombosis-after-splenectomy-a-meta-analysis
#15
Xiao Zhang, Yadong Wang, Miao Yu, Jinzhao Huang, Dongfeng Deng, Huanzhou Xue
PURPOSE: Portal venous system thrombosis (PVST) is a common and potentially life-threatening complication of splenectomy for portal hypertension due to cirrhosis. METHODS: A meta-analysis was conducted to study the necessity of pharmacologic prophylaxis of PVST after splenectomy and how to select the feasible treatment method. Articles were searched through the PubMed, EMBASE, Cochrane Library databases, and CNKI. RESULTS: Overall, 404 articles were initially identified, and 11 of them were eligible...
March 2017: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/28295882/identifying-atrial-fibrillation-in-outpatients-initiating-oral-anticoagulants-based-on-medico-administrative-data-results-from-the-french-national-healthcare-databases
#16
Cécile Billionnet, François Alla, Éric Bérigaud, Antoine Pariente, Géric Maura
PURPOSE: Identifying atrial fibrillation (AF) in outpatients treated with oral anticoagulants (OACs) from claims databases is challenging when the outpatient indication is not available, as OACs are also prescribed for deep vein thrombosis/pulmonary embolism (DVT/PE) that may be treated in the ambulatory setting. An algorithm was developed to identify AF in outpatients initiating OAC from medico-administrative data. METHODS: Among patients initiating OAC in 2013 in the French healthcare databases, those treated for orthopaedic indications were excluded...
March 14, 2017: Pharmacoepidemiology and Drug Safety
https://www.readbyqxmd.com/read/28295638/effect-of-direct-oral-anticoagulants-on-the-risk-of-delayed-bleeding-after-gastric-endoscopic-submucosal-dissection
#17
Toshiyuki Yoshio, Hideomi Tomida, Ryuichiro Iwasaki, Yusuke Horiuchi, Masami Omae, Akiyoshi Ishiyama, Toshiaki Hirasawa, Yorimasa Yamamoto, Tomohiro Tsuchida, Junko Fujisaki, Takuya Yamada, Eiji Mita, Tomoyuki Ninomiya, Kojiro Michitaka, Masahiro Igarashi
OBJECTIVES: Anticoagulants are used to prevent thromboembolic event. Direct oral anticoagulants (DOACs) are our new choice; however, their effect on the bleeding risk for endoscopic treatment has not been reported. We aimed to assess the clinical effect of DOACs compared to warfarin for gastric endoscopic submucosal dissection (ESD). METHODS: We retrospectively studied 97 patients on anticoagulants treated 108 gastric neoplasms with ESD in three referral institutes...
March 10, 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/28293797/comparative-risk-of-major-bleeding-with-new-oral-anticoagulants-noacs-and-phenprocoumon-in-patients-with-atrial-fibrillation-a-post-marketing-surveillance-study
#18
Stefan H Hohnloser, Edin Basic, Michael Nabauer
BACKGROUND: Non-vitamin K antagonist oral anticoagulants (NOACs) are at least as effective and safe as vitamin K antagonists (VKAs) for stroke prevention in atrial fibrillation (AF). All pivotal trials have compared NOACs to warfarin. However, other VKAs are commonly used, for instance phenprocoumon. PATIENTS AND METHODS: A retrospective cohort study using a German claims database assessed the comparative risks of bleeding leading to hospitalization during therapy with NOACs and phenprocoumon in AF patients...
March 14, 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/28293127/care-pathways-in-thrombosis-management-the-innovate-peer-to-peer-educational-initiative
#19
REVIEW
Raj K Patel
CONTEXT: Anticoagulant options for the management of venous thromboembolism (VTE) now include the non-vitamin K antagonist oral anticoagulants (NOACs). The safe and effective integration of these agents into routine clinical practice within different health care settings presents common challenges. Bayer AG created the INternational Network fOr Venous and Arterial Thrombosis Excellence in practice (INNOVATE) program as a professional education network to foster best practice in thrombosis management in the NOAC era...
2017: Advances in Medical Education and Practice
https://www.readbyqxmd.com/read/28290837/-the-choice-of-anticoagulant-therapy-in-patients-with-non-valvular-atrial-fibrillation-and-chronic-kidney-disease
#20
N A Koziolova, E A Polyanskaya, I I Kolegova
The review shows the prevalence of atrial fibrillation (AF) in patients with chronic kidney disease (CKD), depending on the severity of the disease. Patients with non-valvular AF and CKD have a significantly increased risk of both bleeding and thromboembolic complications, and death from all causes. Evaluation of the results of randomized clinical trials (RCTs), meta-analyzes of RCTs demonstrated the advantages of the new oral anticoagulants (NOAC), such as dabigatran, rivaroxaban, apixaban, compared with warfarin in reducing the risk of bleeding in patients with AF and CKD in predialysis stage...
January 2017: Kardiologiia
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