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https://www.readbyqxmd.com/read/29352936/freeze-dried-chitosan-acetate-dressings-with-glycosaminoglycans-and-traxenamic-acid
#1
Francesca Saporito, Giuseppina Sandri, Silvia Rossi, Maria Cristina Bonferoni, Federica Riva, Lorenzo Malavasi, Carla Caramella, Franca Ferrari
Bleeding control plays an important role to increase survival in the early phase after a traumatic event. The aim of present work was the development of hemostatic sponge-like dressings based on chitosan, in association with glycosaminoglycans (GAG) (chondroitin sulfate or hyaluronic acid) and the improvement of their hemostatic performance by loading tranexamic acid (TA). The dressings were prepared by lyophilizazion and were characterized for mechanical, hydration, bioadhesion properties and morphology. Moreover, FTIR analysis was performed to understand the interactions between the different polyelectrolytes present in the dressings...
March 15, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29352906/preparation-of-composite-hydroxybutyl-chitosan-sponge-and-its-role-in-promoting-wound-healing
#2
Shihao Hu, Shichao Bi, Dong Yan, Zhongzheng Zhou, Guohui Sun, Xiaojie Cheng, Xiguang Chen
In this work, a composite sponge was produced by physically mixing hydroxybutyl chitosan with chitosan to form a porous spongy material through vacuum freeze-drying. Hydrophilic and macroporous composite hydroxybutyl chitosan sponge was developed via the incorporation of chitosan into hydroxybutyl chitosan. The composite sponge showed higher porosity (about 85%), greater water absorption (about 25 times), better softness and lower blood-clotting index (BCI) than those of chitosan sponge and hydroxybutyl chitosan sponge...
March 15, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29352439/single-incision-laparoscopic-transgastric-underrunning-and-closure-of-cameron-ulcers-in-acute-gastrointestinal-bleeding
#3
Chun Han Nigel Tan, Guowei Kim, Jimmy So, Asim Shabbir
INTRODUCTION: Endoscopic therapy remains the cornerstone of hemostasis for gastrointestinal bleeding. In situations where hemostasis cannot be achieved via endoscopic or radiological methods, surgery is necessary. Traditional open surgery for bleeding gastric ulcers can be very morbid and unsuitable especially in hemodynamically unstable patients in extremis. We describe a minimally invasive, transgastric approach for underrunning and closure of Cameron ulcers. METHODS: Our patient is a 75-year-old Chinese lady, who presented to the emergency department with fresh melena...
January 19, 2018: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/29350061/the-adverse-effects-of-environmental-noise-exposure-on-oxidative-stress-and-cardiovascular-risk
#4
Thomas Münzel, Mette Sørensen, Frank P Schmidt, Erwin Schmidt, Sebastian Steven, Swenja Kröller-Schön, Andreas Daiber
Epidemiological studies have provided evidence that traffic noise exposure is linked to cardiovascular diseases such as arterial hypertension, myocardial infarction and stroke. Noise is a non-specific stressor that activates the autonomous nervous system and endocrine signaling. According to the noise reaction model introduced by Babisch and colleagues, chronic low levels of noise can cause so called non-auditory effects, such as disturbances of activity, sleep and communication, which can trigger a number of emotional responses, including annoyance and subsequent stress...
January 19, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29346831/postoperative-reduction-of-intraventricular-hemorrhage-volume-single-versus-dual-catheter-drainage
#5
Syed Shahzad Hussain, Asif Raza, Saman Shahid, Hafiz Hamza Asif, Usman Ahmad, Naveed Ashraf
BACKGROUND/AIMS:  The use of single/dual external ventricular drains (EVD) for reducing intraventricular hemorrhage (IVH) is under investigation. A randomized controlled trial was conducted to compare postoperative reduction of IVH volume using single- and dual-catheter drainage in spontaneous IVH patients. We investigated factors that may influence an effective hematoma volume reduction by EVDs. MATERIALS AND METHODS:  The average cerebrospinal fluid (CSF) drainage volumes were analyzed...
January 18, 2018: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/29344582/factor-xiii-in-plasma-but-not-in-platelets-mediates-red-blood-cell-retention-in-clots-and-venous-thrombus-size-in-mice
#6
Sravya Kattula, James R Byrnes, Sara M Martin, Lori A Holle, Brian C Cooley, Matthew J Flick, Alisa S Wolberg
The transglutaminase factor XIII (FXIII) stabilizes clots against mechanical and biochemical disruption and is essential for hemostasis. In vitro and in vivo models of venous thrombosis demonstrate that FXIII mediates clot size by promoting red blood cell (RBC) retention. However, the key source of FXIII and whether FXIII activity can be reduced to suppress thrombosis without imposing deleterious hemostatic consequences are 2 critical unresolved questions. FXIII is present in multiple compartments, including plasma (FXIIIplasma) as a heterotetramer of A2 and B2 subunits and platelets (FXIIIplt) as an A2 homodimer...
January 9, 2018: Blood Advances
https://www.readbyqxmd.com/read/29344007/four-factor-prothrombin-complex-concentrate-improves-thrombin-generation-and-prothrombin-time-in-patients-with-bleeding-complications-related-to-rivaroxaban-a-single-center-pilot-trial
#7
Bettina Schenk, Stephanie Goerke, Ronny Beer, Raimund Helbok, Dietmar Fries, Mirjam Bachler
Background: Direct oral anticoagulants (DOACs) pose a great challenge for physicians in life-threatening bleeding events. The aim of this study was to test the efficacy of reversing the DOAC rivaroxaban using four-factor PCC (prothrombin complex concentrate), a non-specific reversing agent. Methods: Patients with life-threatening bleeding events during rivaroxaban treatment were included and administered 25 U kg-1 of PCC. Blood samples were collected immediately prior to as well as after PCC treatment at predefined time intervals...
2018: Thrombosis Journal
https://www.readbyqxmd.com/read/29342466/deep-vein-thrombosis-a-rare-cause-of-acute-testicular-pain-case-report-literature-review
#8
Adrián Amador Robayna, Jonathan Rodríguez Talavera, Begoña Ballesta Martínez, Javier Falcón Barroso, Almudena Carrión Valencia, Nuria Orribo Morales, Melania Santacruz Pérez, Jesús Monllor Gisbert
INTRODUCTION: Thrombosis is defined as the formation of a clot in a blood vessel that obstructs the flow of blood to the peripheral tissues. The incidence of thromboembolic disease ranges from 0.7 to 1.2% within urology. CASE REPORT: A 40-year-old warehouse worker male presented to the emergency department with worsening of a month's lasting scrotal pain. Physical examination showed the presence of an enlarged and painful left testicle with no other findings. Right testicle, penis and abdominal examination showed no abnormalities whatsoever...
January 17, 2018: Urologia Internationalis
https://www.readbyqxmd.com/read/29341135/phenolic-fractions-from-nine-trifolium-species-modulate-the-coagulant-properties-of-blood-plasma-in-vitro-without-cytotoxicity-towards-blood-cells
#9
Joanna Kolodziejczyk-Czepas, Malgorzata Sieradzka, Barbara Moniuszko-Szajwaj, Pawel Nowak, Wiesław Oleszek, Anna Stochmal
OBJECTIVE: The study covers an evaluation of the influence of extracts (1-50 μg/ml), isolated from aerial parts of nine Trifolium L. species (i.e. T. alexandrinum, T. fragiferum, T. hybridum, T. incarnatum, T. pallidum, T. pratense, T. resupinatum var. majus, T. resupinatum var. resupinatum and T. scabrum) on haemostatic properties of blood plasma. METHODS: The clot formation and fibrinolysis assay (CFF), blood clotting times, the extrinsic and intrinsic coagulation pathway-dependent polymerization of plasma fibrin were measured...
January 17, 2018: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/29338127/establishment-of-practical-recellularized-liver-graft-for-blood-perfusion-using-primary-rat-hepatocytes-and-liver-sinusoidal-endothelial-cells
#10
H Kojima, K Yasuchika, K Fukumitsu, T Ishii, S Ogiso, Y Miyauchi, R Yamaoka, T Kawai, H Katayama, E Y Yoshitoshi-Uebayashi, S Kita, K Yasuda, N Sasaki, J Komori, S Uemoto
Tissue decellularization produces a three-dimensional scaffold that can be potentially used to fabricate functional liver grafts following recellularization. An inappropriate cell distribution and clotting during blood perfusion hinder the practical use of recellularized livers. Here, we aimed to establish a seeding method for the optimal distribution of parenchymal and endothelial cells, and to evaluate the effect of liver sinusoidal endothelial cells (LSECs) in the decellularized liver. Primary rat hepatocytes and LSECs were seeded into decellularized whole-liver scaffolds via the biliary duct and portal vein, respectively...
January 16, 2018: American Journal of Transplantation
https://www.readbyqxmd.com/read/29337700/increased-resistance-to-tissue-plasminogen-activator-induced-fibrinolysis-in-healthy-subjects-from-thailand
#11
Nathan J White, Nicholas Taflin, Esther B Lim, Osaree Akaraborworn
: There is significant variability in blood coagulation among world populations. In particular, there may exist important differences in regulation of the fibrinolytic system in Asian populations that contribute to diseases of thrombosis and hemostasis. To investigate this issue, we compared fibrinogen concentration, plasma clot formation, and fibrinolytic resistance of healthy Asian subjects from Hat Yai, Songkhla, Thailand (Thai) vs. healthy North American subjects from Seattle, Washington, USA (SEA). Citrated plasma samples were obtained from healthy adult volunteers...
January 13, 2018: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/29336975/mechanical-and-biochemical-role-of-fibrin-within-a-venous-thrombus
#12
REVIEW
Anirudh Chandrashekar, Gurtej Singh, Jonah Garry, Nicholas Sikalas, Nicos Labropoulos
BACKGROUND: The physical properties of a venous thrombus are derived from molecular characteristics, including fibrin polymer diameter, density, branching, and cross-linking. Dense thrombi with thin, highly branched fibrin fibres and small pores in the meshwork have been observed to be more rigid, less permeable, and more resistant to lysis. The three dimensional fibrin meshwork acts as the main structure to entrap and capture erythrocytes, platelets and plasma components. Attached factors become integrated into the developing thrombus, co-localise with fibrin deposition and act in either a pro- or anticoagulant capacity...
January 12, 2018: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/29334429/superhydrophobic-superhydrophilic-janus-fabrics-reducing-blood-loss
#13
Tang Zhu, Junrong Wu, Ning Zhao, Chao Cai, Zhenchao Qian, Fangfang Si, Heng Luo, Jing Guo, Xuan Lai, Longquan Shao, Jian Xu
Hemostatic fabrics are most commonly used in baseline emergency treatment; however, the unnecessary blood loss due to the excessive blood absorption by traditional superhydrophilic fabrics is overlooked. Herein, for the first time, superhydrophobic/superhydrophilic Janus fabrics (superhydrophobic on one side and superhydrophilic on the other) are proposed: the superhydrophilic part absorbs water in the blood to expedite the clotting while the superhydrophobic part prevents blood from further permeating. Compared with the common counterparts, effective bleeding control with reducing blood loss more than 50% can be achieved while the breathability largely remain by using Janus fabrics...
January 15, 2018: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29332028/possible-erythrocyte-contributions-to-and-exacerbation-of-the-post-thrombolytic-no-reflow-phenomenon
#14
Shang-Jen Yu, James P Buerck, Edgar A O'Rear, Thomas L Whitsett
BACKGROUND: Reperfusion injury often occurs with therapeutic intervention addressing the arterial occlusions causing acute myocardial infarction and stroke. The no-reflow phenomenon has been ascribed to leukocyte plugging and blood vessel constriction in the microcirculation. OBJECTIVE: To assess possible red cell contributions to post thrombolytic no-reflow phenomenon. METHODS: Blood clots were formed by recalcifying 1 ml of citrated fresh human venous blood and then lysed by adding 1,000 units of streptokinase (SK) at several intervals within 1 hour...
January 11, 2018: Biorheology
https://www.readbyqxmd.com/read/29330877/characterization-of-biologic-response-modifiers-in-the-supernatant-of-conventional-refrigerated-and-cryopreserved-platelets
#15
Lacey Johnson, Shereen Tan, Emily Jenkins, Ben Wood, Denese C Marks
BACKGROUND: Alternatives to room temperature storage of platelets (PLTs) are of interest to support blood banking logistics. The aim of this study was to compare the presence of biologic response modifiers (BRMs) in PLT concentrates stored under conventional room temperature conditions with refrigerated or cryopreserved PLTs. STUDY DESIGN AND METHODS: A three-arm pool-and-split study was carried out using buffy coat-derived PLTs stored in 30% plasma/70% SSP+. The three matched treatment arms were as follows: room temperature (20-24°C), cold (2-6°C), and cryopreserved (-80°C with DMSO)...
January 12, 2018: Transfusion
https://www.readbyqxmd.com/read/29330124/manipulating-the-epigenome-for-the-treatment-of-disorders-with-thrombotic-complications
#16
REVIEW
Faith A A Kwa, Denise E Jackson
The haemostatic system is tightly regulated to maintain homeostasis to avoid unwanted bleeding or thrombotic complications. Recent research has highlighted the importance of epigenetic changes, such as DNA methylation, histone modifications, and miRNA-based mechanisms, that alter gene expression. This can give rise to dysregulated haemostatic or vascular expressed molecules contributing to the development of thrombotic complications. Targeting these epigenetic changes could provide a new avenue for the treatment of pathological blood clots...
January 9, 2018: Drug Discovery Today
https://www.readbyqxmd.com/read/29330022/extracellular-matrix-contribution-to-skin-wounds-re-epithelialization
#17
REVIEW
Patricia Rousselle, Marine Montmasson, Cécile Garnier
The ability of skin to act as a barrier is primarily determined by cells that maintain the continuity and integrity of skin and restore it after injury. Cutaneous wound healing in adult mammals is a complex multi-step process that involves overlapping stages of blood clot formation, inflammation, re-epithelialization, granulation tissue formation, neovascularization, and remodeling. Under favorable conditions, epidermal regeneration begins within hours after injury and takes several days until the epithelial surface is intact due to reorganization of the basement membrane...
January 9, 2018: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/29326163/lim-and-cysteine-rich-domains-1-is-required-for-thrombin-induced-smooth-muscle-cell-proliferation-and-promotes-atherogenesis
#18
Jagadeesh Janjanam, Baolin Zhang, Arul M Mani, Nikhlesh K Singh, James G Traylor, A Wayne Orr, Gadiparthi N Rao
Restenosis arises after vascular injury and is characterized by arterial wall thickening and decreased arterial lumen space. Vascular injury induces the production of thrombin, which in addition to its role in blood clotting, acts as a mitogenic and chemotactic factor. In exploring the molecular mechanisms underlying restenosis, here we identified LIM and cysteine-rich domains 1 (LMCD1) as a gene highly responsive to thrombin in human aortic smooth muscle cells (HASMCs). Of note, LMCD1 depletion inhibited proliferation of human but not murine vascular smooth muscle cells...
January 11, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29324883/masp-1-of-the-complement-system-enhances-clot-formation-in-a-microvascular-whole-blood-flow-model
#19
Lorenz Jenny, József Dobó, Péter Gál, Gábor Pál, Wilbur A Lam, Verena Schroeder
The complement and coagulation systems closely interact with each other. These interactions are believed to contribute to the proinflammatory and prothrombotic environment involved in the development of thrombotic complications in many diseases. Complement MASP-1 (mannan-binding lectin-associated serine protease-1) activates coagulation factors and promotes clot formation. However, this was mainly shown in purified or plasma-based static systems. Here we describe the role of MASP-1 and complement activation in fibrin clot formation in a microvascular, whole blood flow model...
2018: PloS One
https://www.readbyqxmd.com/read/29321328/activities-of-thrombin-and-factor-xa-are-essential-for-replication-of-hepatitis-e-virus-and-are-possibly-implicated-in-the-orf1-polyprotein-processing
#20
Gayatri D Kanade, Kunal D Pingale, Yogesh A Karpe
Hepatitis E virus (HEV) is a clinically important positive-sense RNA virus. The ORF1 of HEV encodes a non-structural polyprotein of 1693 amino acids. It is not clear whether the ORF1 polyprotein is processed into distinct enzymatic domains. Many researchers have attempted to understand the mechanisms of pORF1 processing. However, these studies gave varied results and could never convincingly establish the mechanism of pORF1 processing. In this study, we demonstrated the possible role of thrombin and factor Xa in pORF1 processing...
January 10, 2018: Journal of Virology
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