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Low molecular weight heparin

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https://www.readbyqxmd.com/read/29149067/the-hmgb1-rage-pro-inflammatory-axis-in-the-human-placenta-modulating-effect-of-low-molecular-weight-heparin
#1
Cristian Zenerino, Anna Maria Nuzzo, Domenica Giuffrida, Marilisa Biolcati, Alessandra Zicari, Tullia Todros, Alessandro Rolfo
We evaluated whether physiological and pre-eclamptic (PE) placentae, characterized by exacerbated inflammation, presented alterations in pro-inflammatory High Mobility Group Box 1 (HMGB1) and its Receptor of Advanced Glycation End products (RAGE) expression. Moreover, we investigated, in physiological placental tissue, the ability of Low Molecular Weight Heparin (LMWH) to modify HMGB1 structural conformation thus inhibiting RAGE binding and HMGB1/RAGE axis inflammatory activity. HMGB1, RAGE, IL-6 and TNFα (HMGB1/RAGE targets) mRNA expression were assessed by Real Time PCR...
November 17, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29147591/upper-limb-deep-vein-thrombosis-in-patient-with-hemophilia-a-and-heterozygosity-for-prothrombin-g20210a-a-case-report-and-review-of-the-literature
#2
Fares Darawshy, Yosef Kalish, Issam Hendi, Ayman Abu Rmelieh, Tawfik Khoury
Deep vein thrombosis (DVT) is a rare disease in patients with hemophilia A. We report a case of 22-year-old male with severe hemophilia A who presented to the emergency room with 5-day history of right arm pain that was attributed initially to bleeding event. In the absence of external signs of bleeding or hematoma and normal hemoglobin level, we suspected an underlying DVT. Doppler ultrasonography of the right upper limb revealed thrombosis of the subclavian vein and this was confirmed by CT venography. The d-dimer level was normal and investigations for prothrombotic state revealed heterozygosity for prothrombin G20210A mutation...
2017: Case Reports in Hematology
https://www.readbyqxmd.com/read/29147525/multi-component-hybrid-hydrogels-understanding-the-extent-of-orthogonal-assembly-and-its-impact-on-controlled-release
#3
Vânia M P Vieira, Laura L Hay, David K Smith
This paper reports self-assembled multi-component hybrid hydrogels including a range of nanoscale systems and characterizes the extent to which each component maintains its own unique functionality, demonstrating that multi-functionality can be achieved by simply mixing carefully-chosen constituents. Specifically, the individual components are: (i) pH-activated low-molecular-weight gelator (LMWG) 1,3;2,4-dibenzylidenesorbitol-4',4''-dicarboxylic acid (DBS-COOH), (ii) thermally-activated polymer gelator (PG) agarose, (iii) anionic biopolymer heparin, and (iv) cationic self-assembled multivalent (SAMul) micelles capable of binding heparin...
October 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/29145319/primary-myelofibrosis-and-pregnancy-outcomes-after-low-molecular-weight-heparin-administration-a-case-report-and-literature-review
#4
Roxana Elena Bohîlţea, Monica Mihaela Cîrstoiu, Crîngu Antoniu Ionescu, Emilia Niculescu-Mizil, Ana Maria Vlădăreanu, Irina Voican, Mihai Dimitriu, Natalia Turcan
RATIONALE: Primary myelofibrosis is encountered with the myeloproliferative diseases and is the least prevalent among women of childbearing age. The prognosis is guided by pancytopenia, leukemic transformation and thrombosis which are the dominant complications. PATIENT CONCERNS: Data regarding protocol management during pregnancy in the context of myelofibrosis are insufficient. Fewer than ten cases have been described until now and half of this cases have resulted in fetal death due to placental infarction during the second and third trimesters...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29142871/cavernous-sinus-thrombosis-following-dental-extraction-a-rare-case-report-and-forgotten-entity
#5
Karun Aggarwal, Sanjay Rastogi, Atul Joshi, Ashish Kumar, Archana Chaurasia, Rajat Prakash
Prior to the advent of efficacious antimicrobial agents, the mortality rate from cavernous sinus thrombosis (CST) was effectively 100%. There have been very few reports of CST associated with tooth extraction. A 40-year-old female presented to the emergency room with swelling over the right side of the face and history of extraction in the upper right region by an unregistered dental practitioner. The patient presented with diplopia, periorbital ecchymosis, and chemosis of the right eye. A computed tomography scan revealed venous dilatation of the right superior ophthalmic vein...
October 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/29137835/venous-thromboembolism-risk-and-prophylaxis-in-the-portuguese-hospital-care-setting-the-arte-study
#6
Daniel Ferreira, Joaquim Abreu de Sousa, Paulo Felicíssimo, Ana França
INTRODUCTION: Venous thromboembolism (VTE) is a relatively common complication during hospital stay and determination of VTE risk is critical to choosing the best prophylactic strategy for each patient. OBJECTIVES: In the present study we studied the risk profile for VTE in hospitalized patients in a group of hospitals in Portugal. METHODS: Based on an open cohort of 4248 patients hospitalized in surgical, internal medicine, orthopedic or oncology departments, we determined thromboembolic risk at admission by applying a new score, modified from the Caprini and Khorana scores...
November 11, 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/29135051/low-molecular-weight-heparin-and-aspirin-exacerbate-human-endometrial-endothelial-cell-responses-to-antiphospholipid-antibodies
#7
Zola Chihombori Quao, Mancy Tong, Elena Bryce, Seth Guller, Lawrence W Chamley, Vikki M Abrahams
PROBLEM: Women with antiphospholipid antibodies (aPL) are at risk for pregnancy complications despite treatment with low molecular weight heparin (LMWH) or aspirin (ASA). aPL recognizing beta2 glycoprotein I can target the uterine endothelium, however, little is known about its response to aPL. This study characterized the effect of aPL on human endometrial endothelial cells (HEECs), and the influence of LMWH and ASA. METHOD OF STUDY: HEECs were exposed to aPL or control IgG, with or without low-dose LMWH and ASA, alone or in combination...
November 14, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/29133856/therapeutic-targeting-of-extracellular-dna-improves-the-outcome-of-intestinal-ischemic-reperfusion-injury-in-neonatal-rats
#8
Michael Boettcher, Georg Eschenburg, Stefan Mietzsch, Miguel Jiménez-Alcázar, Michaela Klinke, Deirdre Vincent, Bastian Tiemann, Robert Bergholz, Konrad Reinshagen, Tobias A Fuchs
Thrombosis and inflammation cooperate in the development of intestinal infarction. Recent studies suggest that extracellular DNA released by damaged cells or neutrophils in form of extracellular traps (NETs) contributes to organ damage in experimental models of ischemia-reperfusion injury. Here we compared the therapeutic effects of targeting fibrin or extracellular DNA in intestinal infarction after midgut volvulus in rats. Following iatrogenic midgut volvulus induction for 3 hours, we treated animals with a combination of tissue plasminogen activator (tPA) and low molecular weight heparin (LMWH) to target fibrin or with DNase1 to degrade extracellular DNA...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29131355/interaction-of-albumins-and-heparinoids-investigated-by-affinity-capillary-electrophoresis-and-free-flow-electrophoresis
#9
Mona Mozafari, Sami El Deeb, Friederike Krull, Robert Wildgruber, Gerhard Weber, Christian G Reiter, Hermann Wätzig
A fast and precise affinity capillary electrophoresis (ACE) method has been applied to investigate the interactions between two serum albumins (HSA and BSA) and heparinoids. Furthermore, different free flow electrophoresis methods were developed to separate the species which appears owing to interaction of albumins with pentosan polysulfate sodium (PPS) under different experimental conditions. For ACE experiments, the normalized mobility ratios (∆R/Rf ), which provided information about the binding strength and the overall charge of the protein-ligand complex, were used to evaluate the binding affinities...
November 13, 2017: Electrophoresis
https://www.readbyqxmd.com/read/29126891/early-real-world-experience-with-direct-oral-anticoagulants-in-the-treatment-of-intermediate-high-risk-acute-pulmonary-embolism
#10
Sónia Martins Santos, Susana Cunha, Rui Baptista, Sílvia Monteiro, Pedro Monteiro, Francisco Gonçalves, Mariano Pêgo
INTRODUCTION: Intermediate-high risk pulmonary embolism (IHR-PE) has a poor prognosis, but is under-represented in trials of direct oral anticoagulants (DOACs) in venous thromboembolic disease (VTE). We aimed to assess whether the administration of DOACs was equivalent to the conventional (CONV) treatment of low-molecular weight heparin bridged with warfarin for treating IHR-PE. METHODS: We conducted a retrospective cohort study including 59 consecutive patients admitted with IHR-PE and followed for up to three months after discharge...
November 7, 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/29121251/protective-effect-of-fgf-2-and-low-molecular-weight-heparin-protamine-nanoparticles-on-radiation-induced-healing-impaired-wound-repair-in-rats
#11
Jun Kinoda, Masayuki Ishihara, Shingo Nakamura, Masanori Fujita, Koichi Fukuda, Yoko Sato, Hidetaka Yokoe
We examined the effectiveness of localized administration of fibroblast growth factor-2 containing low-molecular-weight heparin/protamine nanoparticles (FGF-2&LMWH/P NPs) on apoptosis in vivo and on healing of radiation-induced skin injury in a rat model. FGF-2 binds onto LMWH/P NPs, which can significantly enhance and stabilize FGF-2 as a local carrier. X-irradiation at a dose of 25 Gy was administered to the lower part of the back (using a lead sheet with two holes) 1 h before the administration of FGF-2&LMWH/P NPs...
November 7, 2017: Journal of Radiation Research
https://www.readbyqxmd.com/read/29112901/novel-method-for-the-determination-of-average-molecular-weight-of-natural-polymers-based-on-2d-dosy-nmr-and-chemometrics-example-of-heparin
#12
Yulia B Monakhova, Bernd W K Diehl, Tung X Do, Margit Schulze, Steffen Witzleben
Apart from the characterization of impurities, the full characterization of heparin and low molecular weight heparin (LMWH) also requires the determination of average molecular weight, which is closely related to the pharmaceutical properties of anticoagulant drugs. To determine average molecular weight of these animal-derived polymer products, partial least squares regression (PLS) was utilized for modelling of diffused-ordered spectroscopy NMR data (DOSY) of a representative set of heparin (n=32) and LMWH (n=30) samples...
November 4, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29112899/authentication-of-animal-origin-of-heparin-and-low-molecular-weight-heparin-including-ovine-porcine-and-bovine-species-using-1d-nmr-spectroscopy-and-chemometric-tools
#13
Yulia B Monakhova, Bernd W K Diehl, Jawed Fareed
High resolution (600MHz) nuclear magnetic resonance (NMR) spectroscopy is used to distinguish heparin and low-molecular weight heparins (LMWHs) produced from porcine, bovine and ovine mucosal tissues as well as their blends. For multivariate analysis several statistical methods such as principal component analysis (PCA), factor discriminant analysis (FDA), partial least squares - discriminant analysis (PLS-DA), linear discriminant analysis (LDA) were utilized for the modeling of NMR data of more than 100 authentic samples...
October 27, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29112549/european-guidelines-on-perioperative-venous-thromboembolism-prophylaxis-patients-with-preexisting-coagulation-disorders-and-after-severe-perioperative-bleeding
#14
Aamer Ahmed, Sibylle Kozek-Langenecker, François Mullier, Sue Pavord, Cedric Hermans
: In patients with inherited bleeding disorders undergoing surgery, we recommend assessment of individual risk for venous thromboembolism, taking into account the nature of the surgery and anaesthetic, type and severity of bleeding disorder, age, BMI, history of thrombosis, the presence of malignancy and other high-risk comorbidities. Venous thromboembolism risk should be balanced against the increased bleeding risk associated with anticoagulant use in patients with known bleeding disorders (Grade 1C). In these patients undergoing major surgery, we recommend against routine postoperative use of pharmacological thromboprophylaxis, especially for patients with haemophilia A and B (Grade 1B)...
November 6, 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/29112548/european-guidelines-on-perioperative-venous-thromboembolism-prophylaxis-aspirin
#15
Jean-Yves Jenny, Ingrid Pabinger, Charles Marc Samama
: There is a good rationale for the use of aspirin in venous thromboembolism prophylaxis in some orthopaedic procedures, as already proposed by the 9th American College of Chest Physicians' guidelines (Grade 1C). We recommend using aspirin, considering that it may be less effective than or as effective as low molecular weight heparin for prevention of deep vein thrombosis and pulmonary embolism after total hip arthroplasty, total knee arthroplasty and hip fracture surgery (Grade 1C). Aspirin may be less effective than or as effective as low molecular weight heparins for prevention of deep vein thrombosis and pulmonary embolism after other orthopaedic procedures (Grade 2C)...
November 6, 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/29112546/european-guidelines-on-perioperative-venous-thromboembolism-prophylaxis-surgery-in-the-obese-patient
#16
Linas Venclauskas, Almantas Maleckas, Juan I Arcelus
: A systematic literature search was performed and patients were selected as obese patients undergoing bariatric surgery or obese patients undergoing nonbariatric surgical procedures. In addition, patients were stratified according to low risk of venous thromboembolism and high risk of venous thromboembolism (age >55 years, BMI >55 kg m, history of venous thromboembolism, venous disease, sleep apnoea, hypercoagulability or pulmonary hypertension). Prophylaxis of venous thromboembolism was analysed depending on the type of modality: compression devices of the lower extremities (including intermittent pneumatic compression and graduated compression stockings), pharmacological prophylaxis or inferior vena cava filters...
November 6, 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/29112545/european-guidelines-on-perioperative-venous-thromboembolism-prophylaxis-intensive-care
#17
Jacques Duranteau, Fabio Silvio Taccone, Peter Verhamme, Walter Ageno
: Venous thromboembolism is a common and potentially life-threatening complication that occurs in 4 to 15% of patients admitted to ICUs despite the routine use of pharmacological prophylaxis. We therefore recommend an institution-wide protocol for the prevention of venous thromboembolism (Grade 1B). The routine use of ultrasonographic screening for deep vein thrombosis is not recommended when thromboprophylactic measures are in place (Grade 1B), as the detection of asymptomatic deep vein thrombosis may prompt therapeutic anticoagulation that may increase bleeding risk but has no proven reduction of clinically significant thrombotic events...
November 6, 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/29112544/european-guidelines-on-perioperative-venous-thromboembolism-prophylaxis-day-surgery-and-fast-track-surgery
#18
Linas Venclauskas, Juan V Llau, Jean-Yves Jenny, Per Kjaersgaard-Andersen, Øivind Jans
: In recent years, day surgery and fast-track surgery have experienced a continuous increase in volume. Many procedures are now performed on an outpatient protocol, including general, orthopaedic, oncological, reconstructive or vascular surgery. The management of these patients is safe, but the incidence of venous thromboembolism in this population remains unknown. Several risk factors can be identified and stratified derived from studies of inpatient surgical management (e.g. Caprini score). Recommendations for thromboprophylaxis should be tailored from the assessment of both personal and procedure-related risk factors, although with a lack of evidence for application in outpatient management...
November 6, 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/29112542/european-guidelines-on-perioperative-venous-thromboembolism-prophylaxis-neurosurgery
#19
David Faraoni, Raquel Ferrandis, William Geerts, Matthew D Wiles
: Although there are numerous publications addressing venous thromboembolism and its prevention in neurosurgery, there are relatively few high-quality studies to guide decisions regarding thromboprophylaxis. In patients undergoing craniotomy, we recommend that if intermittent pneumatic compression (IPC) is used, it should be applied before the surgical procedure or on admission (Grade 1C). In craniotomy patients at particularly high risk for venous thromboembolism, we suggest considering the initiation of mechanical thromboprophylaxis with IPC preoperatively with addition of low molecular weight heparin (LMWH) postoperatively when the risk of bleeding is presumed to be decreased (Grade 2C)...
November 6, 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/29111221/portomesentric-and-splenic-vein-thrombosis-pmsvt-after-bariatric-surgery-a-systematic-review-of-110-patients
#20
Saeed Shoar, Alan A Saber, Rebecca Rubenstein, Saeed Safari, Stacy A Brethauer, Hassan Al-Thani, Armand P Asarian, Ali Aminian
BACKGROUND: Portomesenteric and splenic vein thrombosis (PMSVT) is a rare but potentially serious complication after bariatric surgery. No study has systematically analyzed its incidence and risk factors. OBJECTIVES: To pool the data regarding PMSVT after bariatric surgery and determine its incidence and risk factors. METHODS: A meta-analysis and systematic review was conducted to retrieve studies on PMSVT after bariatric surgery. RESULTS: A total of 41 eligible studies including 110 patients with postbariatric PMSVT were enrolled; the estimated incidence rate based on 13 studies was ...
September 14, 2017: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
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