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https://www.readbyqxmd.com/read/29040837/grape-intake-reduces-thrombin-generation-and-enhances-plasma-fibrinolysis-potential-role-of-circulating-procoagulant-microparticles
#1
Concetta T Ammollo, Fabrizio Semeraro, Rosa Anna Milella, Donato Antonacci, Nicola Semeraro, Mario Colucci
Phytochemicals contained in grapes down-regulate several prothrombotic pathways in vitro. We evaluated the effect of grape consumption on coagulation and fibrinolysis in healthy volunteers. Thirty subjects were enrolled: 20 were given grape (5 g/kg body weight/day for 3 weeks), while 10 served as controls. Blood samples were taken at baseline (T0), at the end of the grape diet (T1) and after 4-week wash-out (T2). Grape intake caused a significant decrease of the procoagulant and inflammatory responses of whole blood and/or mononuclear cells to bacterial lipopolysaccharide at both T1 and T2...
September 1, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29035463/effect-of-balanced-crystalloid-gelatin-and-hydroxyethyl-starch-on-coagulation-detected-by-rotational-thromboelastometry-in-vitro
#2
Silvie Sevcikova, Tomas Vymazal, Miroslav Durila
BACKGROUND: Fluid resuscitation with crystalloid and colloid solutions is a common treatment in perioperative medicine. However, a variety of unbalanced or balanced solutions are used in clinical practice and there is still vivid debate going on regarding selection of optimal fluid with minimal negative effect on coagulation to minimize bleeding and blood transfusion requirements. The aim of the study was to investigate adverse effects of balanced crystalloids and colloids on coagulation measured by thromboelastometry in vitro...
October 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/29035434/zebrafish-larvae-model-of-dilated-cardiomyopathy-induced-by-terfenadine
#3
Gyojeong Gu, Yirang Na, Hyewon Chung, Seung Hyeok Seok, Hae Young Lee
BACKGROUND AND OBJECTIVES: Dilated cardiomyopathy can be the end-stage of severe cardiac disorders and directly affects the cardiac muscle, inducing cardiomegaly and heart failure (HF). Although a wide variety of animal models are available to study dilated cardiomyopathy, there is no model to assess dilated cardiomyopathy with non-invasive, simple, and large screening methods. METHODS: We developed a dilated cardiomyopathy model in zebrafish larvae using short duration terfenadine, a known cardiotoxic drug that induces ventricular size dilation...
September 20, 2017: Korean Circulation Journal
https://www.readbyqxmd.com/read/29033767/hemorrhagic-cholecystitis-in-a-patient-on-maintenance-dialysis
#4
Masayuki Shishida, Masahiro Ikeda, Nozomi Karakuchi, Kosuke Ono, Naofumi Tsukiyama, Manabu Shimomura, Koichi Oishi, Kazuaki Miyamoto, Kazuhiro Toyota, Seiji Sadamoto, Tadateru Takahashi
The present paper describes a case of hemorrhagic cholecystitis in a patient on maintenance dialysis. The patient presented with right upper quadrant abdominal pain. Computed tomography revealed swelling of the gallbladder, high- and isodensity contents of the gallbladder, and high-density stone in the gallbladder neck. He was hospitalized for suspected acute cholecystitis. After hospitalization, his levels of total bilirubin, aspartate aminotransferase, and alanine aminotransferase increased. T2-weighted magnetic resonance imaging showed low-intensity contents expanded to include a wide area from the common bile duct to the cystic duct and gallbladder neck...
May 2017: Case Reports in Gastroenterology
https://www.readbyqxmd.com/read/29033524/influence-of-platelet-rich-fibrin-on-post-extraction-socket-healing-a-clinical-and-radiographic-study
#5
Ahmed Abdullah Alzahrani, Afraa Murriky, Sami Shafik
AIM: The aim of this study was to evaluate clinically and radiographically, extraction socket healing using autologous platelet rich fibrin (PRF). MATERIALS AND METHODS: Twenty-four subjects needing single tooth simple extractions were selected. Twenty-four extraction sockets were divided into test group (PRF, n = 12) and control group (blood clot, n = 12). PRF was prepared with blood drawn from individuals after extraction using standard technique. PRF was placed in test group sockets followed by pressure application and figure 8 sutures...
October 2017: Saudi Dental Journal
https://www.readbyqxmd.com/read/29032818/radiographic-histologic-and-biomechanical-evaluation-of-combined-application-of%C3%A2-platelet-rich-fibrin-with-blood-clot-in%C3%A2-regenerative-endodontics
#6
Ronghui Zhou, Yumin Wang, Yuemin Chen, Shuai Chen, Hongbing Lyu, Zhiyu Cai, Xiaojing Huang
INTRODUCTION: No in vivo study has been reported on the mechanical reinforcement of a tooth after regenerative endodontic treatment (RET). The present work aimed to evaluate the concurrent use of platelet-rich fibrin (PRF) with a blood clot (BC) in RET concerning periapical healing, root development, and tooth structural reinforcement. METHODS: In our study, 24 premolars from 3 beagle dogs were assigned into control, BC, and PRF + BC groups. Periapical healing was monitored with quantitative measurements of root elongation and thickening radiographically...
October 9, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29030495/intracavitary-ultrasound-icarus-a-neuroendoscopic-adaptation-of-intravascular-ultrasound-for-intracerebral-hemorrhage-evacuation
#7
Alexander G Chartrain, Danny Hom, Joshua B Bederson, J Mocco, Christopher Paul Kellner
Neurosurgeons performing intracerebral hemorrhage evacuation procedures have limited options for monitoring hematoma evacuation and assessing residual hematoma burden intraoperatively. Here, we report the successful neuroendoscopic adaptation of intravascular ultrasound, referred to here as intracavitary ultrasound (ICARUS), in two patients. Pre-evacuation ICARUS demonstrated dense hematomas in both patients. Post-evacuation ICARUS in patient 1 demonstrated significant reduction in clot burden and two focal hyperechoic regions consistent with pockets of hematoma not previously seen with the endoscope or burr hole ultrasound...
October 13, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29029707/epidemiology-pathophysiology-stratification-and-natural-history-of-pulmonary-embolism
#8
Nicholas J Giordano, Paul S Jansson, Michael N Young, Kaitlin A Hagan, Christopher Kabrhel
Pulmonary embolism (PE) is a common and potentially fatal form of venous thromboembolism that can be challenging to diagnose and manage. PE occurs when there is obstruction of the pulmonary vasculature and is a common cause of morbidity and mortality in the United States. A combination of acquired and inherited factors may contribute to the development of this disease and should be considered, since they have implications for both susceptibility to PE and treatment. Patients with suspected PE should be evaluated efficiently to diagnose and administer therapy as soon as possible, but the presentation of PE is variable and nonspecific so diagnosis is challenging...
September 2017: Techniques in Vascular and Interventional Radiology
https://www.readbyqxmd.com/read/29021846/the-influence-of-residual-apixaban-on-bleeding-complications-during-and-after-catheter-ablation-of-atrial-fibrillation
#9
Yutaro Mukai, Kyoichi Wada, Koji Miyamoto, Kazuki Nakagita, Mai Fujimoto, Kouichi Hosomi, Takeshi Kuwahara, Mitsutaka Takada, Kengo Kusano, Akira Oita
BACKGROUND: The periprocedural protocol for atrial fibrillation (AF) ablation commonly includes anticoagulation therapy. Apixaban, a direct oral anticoagulant, is currently approved for clinical use; however, little is known about the effects of residual apixaban concentration on bleeding complications during/after AF ablation. Therefore, we measured residual apixaban concentration by using mass spectrometry and examined the anticoagulant's residual effects on bleeding complications. METHODS: Fifty-eight patients (Mean age of 64...
October 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/29021578/strong-binding-of-platelet-integrin-%C3%AE-iib%C3%AE-3-to-fibrin-clots-potential-target-to-destabilize-thrombi
#10
Peter Höök, Rustem I Litvinov, Oleg V Kim, Shixin Xu, Zhiliang Xu, Joel S Bennett, Mark S Alber, John W Weisel
The formation of platelet thrombi is determined by the integrin αIIbβ3-mediated interactions of platelets with fibrinogen and fibrin. Blood clotting in vivo is catalyzed by thrombin, which simultaneously induces fibrinogen binding to αIIbβ3 and converts fibrinogen to fibrin. Thus, after a short time, thrombus formation is governed by αIIbβ3 binding to fibrin fibers. Surprisingly, there is little understanding of αIIbβ3 interaction with fibrin polymers. Here we used an optical trap-based system to measure the binding of single αIIbβ3 molecules to polymeric fibrin and compare it to αIIbβ3 binding to monomeric fibrin and fibrinogen...
October 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29020709/absorbaseal%C3%A2-vascular-closure-device-a-novel-device-for-hemostasis-following-interventional-peripheral-vascular-procedures
#11
Emily Benham, Koen Deloose, Joren Callaert, Marc Bosiers, Tiffany Cox, Amy Lincourt, B Todd Heniford
INTRODUCTION: Vascular closure devices (VCDs) are designed to achieve rapid hemostasis during percutaneous coronary and peripheral vascular procedures. Studies demonstrate that VCDs improve time to hemostasis (TTH) and time to ambulation (TTA) in comparison to standard manual compression. The available products, however, typically have 13-17 steps in their application, often require hemostatic collagen or other agents as part of the process, and can result in significant scarring at the puncture site that can impact future access...
October 12, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/29020506/potential-application-of-immobilized-streptokinase-extracted-from-streptococcus-equinus-vit_vb2
#12
B Vaishnavi, C Subathra Devi
Streptokinase purified from Streptococcus equinus VIT_VB2 isolated from bovine milk sample was immobilized in various solid supports namely entrapment in agarose gel, calcium alginate beads and gelatin gel by crosslinking with formaldehyde. Immobilization of streptokinase in calcium alginate beads showed maximum efficiency (81.8 ± 1.06%) when compared to entrapment with agarose gel (55.6 ± 2.17%) and cross-linked gelatin formaldehyde gel (71.0 ± 1.54%). The purified SK activity was expressed maximum in calcium alginate (1%) and gelatin gel (0...
October 11, 2017: Preparative Biochemistry & Biotechnology
https://www.readbyqxmd.com/read/29019885/two-incision-laparoscopic-appendectomy-for-a-severe-hemophilia-a-child-patient-with-coagulation-factor-vii-deficiency-case-report-and-review-of-literature
#13
Jin Peng He, Jie Xiong Feng
RATIONALE: The main complication of patients with severe hemophilia is recurrent bleeding events that usually affected musculoskeletal contractures. And replacement therapy methods were continuously improved to minimize adverse impacts brought by those complications. However, only several cases reported about the appendectomy for hemophilia A. We report a case of acute appendicitis treated by two-incision laparoscopy in a boy with hemophilia A and coagulation factor VII deficiency for the first time...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29019480/design-and-development-of-polysaccharide-hemostatic-materials-and-their-hemostatic-mechanism
#14
REVIEW
Xiao Yang, Wen Liu, Na Li, Mingshan Wang, Bin Liang, Ihsan Ullah, Agnaldo Luis Neve, Yakai Feng, Hao Chen, Changcan Shi
The formation of stable blood clots or hemostasis is essential to prevent major blood loss and death from excessive bleeding. However, the body's own coagulation process is not able to accomplish timely hemostasis without the assistance of hemostatic agents. For developing novel topical hemostatic agents, tissue adhesives and sealants, it is necessary to understand the coagulation process and the hemostasis mechanism of different materials. Among hemostatic materials, polysaccharides are naturally derived polymers having excellent biodegradable and biocompatible properties...
October 11, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/29018227/the-human-blood-parasite-schistosoma-mansoni-expresses-extracellular-tegumental-calpains-that-cleave-the-blood-clotting-protein-fibronectin
#15
Qiang Wang, Akram A Da'dara, Patrick J Skelly
Schistosomes are intravascular, parasitic flatworms that cause debilitating disease afflicting >200 million people. Proteins expressed at the host-parasite interface likely play key roles in modifying the worm's local environment to ensure parasite survival. Proteomic analysis reveals that two proteases belonging to the calpain family (SmCalp1 and SmCalp2) are expressed in the Schistosoma mansoni tegument. We have cloned both; while highly conserved in domain organization they display just 31% amino acid sequence identity...
October 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28994575/thrombin-activatable-microbubbles-as-potential-ultrasound-contrast-agents-for-the-detection-of-acute-thrombosis
#16
Jacques Lux, Alexander M Vezeridis, Kenneth Hoyt, Stephen Roy Adams, Amanda M Armstrong, Shashank R Sirsi, Robert Mattrey
Acute deep vein thrombosis (DVT) is the formation of a blood clot in the deep veins of the body that can lead to fatal pulmonary embolism. Acute DVT is difficult to distinguish from chronic DVT by ultrasound (US), the imaging modality of choice, and is therefore treated aggressively with anticoagulants, which can lead to internal bleeding. Here we demonstrate that conjugating perfluorobutane (PFB)-filled microbubbles (MBs) with thrombin-sensitive activatable cell-penetrating peptides (ACPP) could lead to the development of contrast agents that detect acute thrombosis with US imaging...
October 10, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28994570/clustering-of-cyclodextrin-functionalized-microbeads-by-an-amphiphilic-biopolymer-real-time-observation-of-structures-resembling-blood-clots
#17
Chandamany Arya, Camila A Saez Cabesas, Hubert Huang, Srinivasa R Raghavan
Colloidal particles can be induced to cluster by adding polymers in a process called bridging flocculation. For bridging to occur, the polymer must bind strongly to the surfaces of adjacent particles, such as via electrostatic interactions. Here, we introduce a new system where bridging occurs due to specific interactions between the side chains of an amphiphilic polymer and supramolecules on the particle surface. The polymer is a hydrophobically modified chitosan (hmC) while the particles are uniform polymeric microbeads (∼160 μm in diameter) made by a microfluidic technique and functionalized on their surface by α-cyclodextrins (CDs)...
October 10, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28992806/in-vitro-and-in-vivo-evaluation-of-the-duck-s-feet-collagen-sponge-for-hemostatic-applications
#18
Ye Been Seo, Ok Joo Lee, Md Tipu Sultan, Jung Min Lee, Ye Ri Park, Yeung Kyu Yeon, Ji Seung Lee, Young Jin Lee, Soon Hee Kim, Chan Hum Park
Recently different hemostatic agents have been developed, but most of them are ineffective in severe bleeding and expensive or cause safety concerns. In this study, we fabricated duck's feet collagen-based porous sponges and investigated its use as a hemostatic agent. We determined the sponge's physical and biological characteristics and compared with Avitene via scanning electron microscope analysis, water-uptake abilities and porosity test, and cytotoxicity assay. The duck's feet collagen/silk sponge showed a larger interconnected porous structure compared to others sponges...
October 2017: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/28992628/ultrastructural-confocal-and-viscoelastic-characteristics-of-whole-blood-and-plasma-after-exposure-to-cadmium-and-chromium-alone-and-in-combination-an-ex-vivo-study
#19
Chantelle Venter, Hester Magdalena Oberholzer, Janette Bester, Mia-Jeanne van Rooy, Megan Jean Bester
BACKGROUND/AIMS: Heavy metal pollution is increasing in the environment, contaminating water, food and air supplies. This can be linked to many anthropogenic activities. Heavy metals are absorbed through the skin, inhalation and/or orally. Irrespective of the manner of heavy metal entry in the body, the blood circulatory system is potentially the first to be affected following exposure and adverse effects on blood coagulation can lead to associated thrombotic disease. Although the plasma levels and the effects of cadmium (Cd) and chromium (Cr) on erythrocytes and lymphocytes have been described, the environmental exposure to heavy metals are not limited to a single metal and often involves metal mixtures, with each metal having different rates of absorption, different cellular, tissue, and organ targets...
October 9, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28992468/dronedarone-exerts-anticoagulant-and-antiplatelet-effects-independently-of-its-antiarrhythmic-actions
#20
M Urooj Zafar, Carlos G Santos-Gallego, Donald A Smith, Jonathan L Halperin, Juan J Badimon
BACKGROUND AND AIMS: Dronedarone reduced the rate of stroke and transient ischemic attack in patients with paroxysmal atrial fibrillation (AF) in the ATHENA trial. This cannot be explained by its antiarrhythmic effect alone and may involve alternative mechanisms. This study aimed to investigate any direct effect of dronedarone on blood thrombogenicity, independent of its antiarrhythmic effects. METHODS: Blood samples from patients with cardiovascular disease (n = 30) taking no anticoagulant or antiplatelet medication except aspirin were incubated with dronedarone's active metabolite (SR35021A) at 66 ng/ml (am-L) and 119 ng/ml (am-H), i...
September 28, 2017: Atherosclerosis
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