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https://www.readbyqxmd.com/read/28938703/evaluation-of-thromboelastometry-parameters-as-predictive-markers-for-sinusoidal-obstruction-syndrome-in-patients-undergoing-allogeneic-stem-cell-transplantation-for-acute-leukaemia
#1
Joanna Rupa-Matysek, Lidia Gil, Ewelina Wojtasińska, Zuzanna Kanduła, Adam Nowicki, Magdalena Matuszak, Mieczysław Komarnicki
Hepatic sinusoidal obstruction syndrome (previously named veno-occlusive disease, SOS/VOD) is a serious complication of allogeneic stem cell transplantation (HSCT). Early identification of patients at risk of SOS/VOD may possibly improve the outcome and reduce mortality. Rotation thromboelastometry (ROTEM) is global assay allowing for the precise assessment of both bleeding and thrombotic conditions, however, its usefulness in patients undergoing HSCT for acute leukaemia has not been studied. We evaluated the thromboelastometry parameters in patients undergoing allogeneic HSCT for acute leukaemia to identify candidate biomarkers of SOS/VOD occurrence...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28938065/in-vitro-selection-of-diversely-functionalized-aptamers
#2
Dehui Kong, Wayland Yeung, Ryan Hili
We describe the application of T4 DNA ligase-catalyzed DNA templated oligonucleotide polymerization toward the evolution of a diversely functionalized nucleic acid aptamer for human α-thrombin. Using a 256-membered ANNNN co-monomer library comprising 16 sub-libraries modi-fied with different functional groups, a highly-functionalized aptamer for thrombin was raised with a dissociation constant of 1.6 nM. The aptamer was found to be selective for thrombin, and re-quired the modifications for binding affinity...
September 22, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28936710/cloning-expression-purification-and-bioactivity-evaluation-of-a-thrombin-like-enzyme-from-deinagkistrodon-acutus-venom-gland-library
#3
An Li, Chuan Zhang, Jie Wang, Junjie Wang, Hailong Jiang, Jianzhong Li, Xingyuan Ma, Wen Zhang, Yiming Lu
OBJECTIVES: To identify a new member of serine proteases from Deinagkistrodon acutus via phage display technique and appraise its biocatalytic activities. RESULTS: A novel thrombin-like enzyme gene was cloned by screening the phage display library of D. acutus venom gland. The gene has a 783 bp ORF encoding 260 amino acids. A recombinant enzyme expression vector was constructed and the fused protein was expressed in Escherichia coli. The protein was purified showing a single band of approx...
September 21, 2017: Biotechnology Letters
https://www.readbyqxmd.com/read/28935443/complex-formation-with-protamine-prolongs-the-thrombin-inhibiting-effect-of-dna-aptamer-in-vivo
#4
V A Spiridonova, T M Novikova, D M Nikulina, T A Shishkina, E V Golubkina, O S Dyukareva, N N Trizno
Antithrombin DNA aptamersRE31 are single-chain oligonucleotides that fold into three-dimensional forms allowing them to bind the enzyme with high affinity and inhibit its activity in vivo. They are rapidly degraded by a nonspecific nuclease, and, to prolong the lifetime of the aptamer DNA in the bloodstream, it is necessary to coat it with a polymer envelope. A new approach to solving this problem based on preparation of DNA-polyelectrolyte complexes with a minimal particle size that can circulate with blood flow...
September 18, 2017: Biochimie
https://www.readbyqxmd.com/read/28934241/hla-dr7-and-hla-dq2-transgenic-mouse-strains-tested-as-a-model-system-for-ximelagatran-hepatotoxicity
#5
Hanna Lundgren, Klara Martinsson, Karin Cederbrant, Johan Jirholt, Daniel Mucs, Katja Madeyski-Bengtson, Said Havarinasab, Per Hultman
The oral thrombin inhibitor ximelagatran was withdrawn in the late clinical trial phase because it adversely affected the liver. In approximately 8% of treated patients, drug-induced liver injury (DILI) was expressed as transient alanine transaminase (ALT) elevations. No evidence of DILI had been revealed in the pre-clinical in vivo studies. A whole genome scan study performed on the clinical study material identified a strong genetic association between the major histocompatibility complex alleles for human leucocyte antigens (HLA) (HLA-DR7 and HLA-DQ2) and elevated ALT levels in treated patients...
2017: PloS One
https://www.readbyqxmd.com/read/28934202/platelet-dysfunction-contributes-to-bleeding-complications-in-patients-with-probable-leptospirosis
#6
Rahajeng N Tunjungputri, Muhammad Hussein Gasem, Willemijn van der Does, Pandu H Sasongko, Bambang Isbandrio, Rolf T Urbanus, Philip G de Groot, Andre van der Ven, Quirijn de Mast
BACKGROUND: Severe leptospirosis is frequently complicated by a hemorrhagic diathesis, of which the pathogenesis is still largely unknown. Thrombocytopenia is common, but often not to the degree that spontaneous bleeding is expected. We hypothesized that the hemorrhagic complications are not only related to thrombocytopenia, but also to platelet dysfunction, and that increased binding of von Willebrand factor (VWF) to platelets is involved in both platelet dysfunction and increased platelet clearance...
September 21, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28933535/development-of-visible-light-induced-photoelectrochemical-platform-based-on-cyclometalated-iridium-iii-complex-for-bioanalysis
#7
Chunxiang Li, Weisen Lu, Ming Zhu, Bo Tang
The performance of the photoelectrochemical (PEC) bioanalysis relies closely on the properties of the usedphotoactive species. In this study, a visible-light induced PEC active species, [(C6)2Ir(dcbpy)]+PF6- (C6 = coumarin 6, dcbpy = 2,2'-bipyridine-4,4'-dicarboxylic acid) was prepared based on C6 with the stronger absorbance in the visible region. The as-prepared complex was characterized by 1H NMR,UV-visible absorption and cyclic voltammetry. It exhibits intense absorption in visible region at 480 nm with a molar extinction coefficient (ε) of more 40000 M-1cm-1, which is approximately twice that of Ru(bpy)32+...
September 21, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28930957/clot-dynamics-and-mortality-the-ma-r-ratio
#8
Stephanie A Savage, Ben L Zarzaur, Timothy H Pohlman, Brian L Brewer, Louis J Magnotti, Martin A Croce, Garrett H Lim, Ali C Martin
INTRODUCTION: The coagulopathy of trauma, illustrated by a short R-time, is common and well understood. The physiology behind this may be early thrombin burst with rapid clot formation. Rapid consumption of fibrinogen, however, may result in weak clot and substrate depletion, resulting in low MA. While these characteristics are interesting, utilizing thromboelastography (TEG) to identify those at risk of subsequent bleeding diathesis, especially in those who do not demonstrate early signs of physiologic derangement, is challenging...
October 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28930804/venous-thromboembolism-in-gynecological-malignancy
#9
Abigail Cohen, Chung Sim Lim, Alun Huw Davies
OBJECTIVE: Venous thromboembolism (VTE) is a recognized complication of gynecological malignancy and represents a leading cause of morbidity and mortality in these patients. The review aimed to discuss the incidence, risk factors, and clinical presentation of VTE before examining the literature on the diagnosis, prevention, and management in the context of uterine, cervical, ovarian, and vulval cancers. METHODS/MATERIALS: A literature search was performed using Ovid Medline and Embase with the following words: "gynecological malignancy," "pelvic tumor," "venous thromboembolism," "deep vein thrombosis" and "pulmonary embolism...
September 19, 2017: International Journal of Gynecological Cancer
https://www.readbyqxmd.com/read/28930238/a-thrombomodulin-gene-polymorphism-c1418t-is-associated-with-early-outcomes-in-patients-undergoing-coronary-artery-bypass-graft-surgery-with-a-conventional-cardiopulmonary-bypass-during-hospitalization
#10
Ching-Chou Pai, Yi-Wen Lin, Yi-Ting Tsai, Shih-Hurng Loh, Chih-Yuan Lin, Chin-Sheng Lin, Yi-Chang Lin, Hung-Yen Ke, Feng-Yen Lin, Chien-Sung Tsai
Background: Thrombomodulin (TM) is a type of cell membrane-bound anticoagulant protein cofactor in the thrombin-mediated activation of protein C. Previous evidence has shown an association between TM polymorphisms and systemic inflammation. Conventional cardiopulmonary bypass (CPB), beating-heart CPB, and off-pump techniques have been widely used in cardiac surgery. However, these techniques may also cause systemic inflammatory responses in the patients. Whether TM polymorphisms are associated with systemic inflammation after cardiac surgery is still unclear...
April 23, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28929689/-comparatively-evaluating-effect-contribution-of-promoting-blood-circulation-of-herb-pairs-containing-angelicae-sinensis-radix-on-xin-sheng-hua-granule-by-withdrawal-analysis
#11
Han-Qing Pang, Jun Wang, Yu-Ping Tang, Liang Wu, Hui-Qin Xu, Yi Jin, Zhen-Hua Zhu, Sheng-Liang Huang, Da-Zheng Sun, Jin-Ao Duan
Xin-Sheng-Hua granule (XSHG) is a popular remedy commonly used in clinic for the treatment of lochiostasis after delivery. To comparatively investigate the roles of herb pairs containing Angelicae Sinensis Radix (Danggui) upon the formula by evaluating the blood coagulation and hemorheology function in acute blood stasis rats, acute blood stasis rat model was established by ice water bath and subcutaneous injection of adrenaline. And the blood stasis mice were administrated intragastrically with different samples of the formula minus herb pairs containing Danggui and the whole formula (XSHG, SHD, DY, DC, DT, DH, DJ and DZ)...
November 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28929298/chronic-kidney-disease-and-anticoagulation-from-vitamin-k-antagonists-and-heparins-to-direct-oral-anticoagulant-agents
#12
REVIEW
Savino Sciascia, Massimo Radin, Karen Schreiber, Roberta Fenoglio, Simone Baldovino, Dario Roccatello
Anticoagulation in patients with impaired kidney function can be challenging since drugs' pharmacokinetics and bioavailability are altered in this setting. Patients with chronic kidney disease (CKD) treated with conventional anticoagulant agents [vitamin K antagonist (VKA), low-molecular weight heparin (LMWH) or unfractionated heparin (UFH)] are at high risk of bleeding events (both non-major and major clinically relevant bleeding). While anticoagulation reduces the risk of thromboembolic events, the co-existing bleeding risk and the fact that the most commonly used anticoagulation agents are eliminated via the kidneys pose additional challenges...
September 19, 2017: Internal and Emergency Medicine
https://www.readbyqxmd.com/read/28924530/dual-anticoagulation-in-recurrent-thromboembolic-events-with-failure-of-monotherapy-a-novel-approach
#13
Lakshmi Manogna Chintalacheruvu, Osman Bhatty, Venakata Giri Andukuri
In the last few decades many new anticoagulants (i.e direct thrombin and factor ten inhibitors) have been introduced with efficacy that rivals older drugs in the treatment of venous thromboembolism (VTE). However, for all their success, management of patients with recurrent thromboembolic events is still a challenging clinical scenario and not well addressed in the literature. We report the case of a young female with recurrent thromboembolisms in spite of using both newer agents and more conventional therapies...
July 7, 2017: Curēus
https://www.readbyqxmd.com/read/28924291/varied-percutaneous-and-endovascular-management-of-large-iatrogenic-profunda-femoris-artery-pseudoaneurysm
#14
Wasey Jillani, Raza Sayani, Masood Umer, Muhammad Azeemuddin
The case of an elderly male diagnosed with a large iatrogenic pseudoaneurysm arising from the profunda femoris artery on ultrasound examination is presented. The immediate postoperative period was uneventful; however later he developed leg swelling and mild oozing at the incision site. In view of deranged renal function CT angiogram was not done and decision was made to treat the pseudoaneurysm with percutaneous thrombin injection. Almost complete thrombosis was achieved however a small residual portion remained patent near the neck...
September 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28923781/low-dose-of-alcohol-attenuates-pro-atherosclerotic-activity-of-thrombin
#15
Masaaki Toda, Toshiaki Totoki, Chizu Nakamura, Taro Yasuma, Corina N D' Alessandro-Gabazza, Rumi Mifuji-Moroka, Kota Nishihama, Motoh Iwasa, Noriyuki Horiki, Esteban C Gabazza, Yoshiyuki Takei
BACKGROUND AND AIMS: Thrombin, the active enzyme of the coagulation system, plays a critical role in the pathogenesis of atherosclerosis. Vascular repair promoted by stromal cell-derived factor-1 is a protective process in atherosclerosis. Consumption of low amount of alcohol is believed to reduce the risk of atherosclerotic cardiovascular disease but the mechanism is unclear. This study evaluated whether alcohol can modulate the expression of stromal cell-derived factor-1 and the pro-atherosclerotic activity of thrombin...
September 5, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28922398/role-of-the-p2-residue-of-human-alpha-1-antitrypsin-in-determining-target-protease-specificity
#16
Hye-Shin Chung, Ji-Sun Kim, Sang Mee Lee, Soon Jae Park
Alpha 1-antitrypsin (A1AT) is a serine protease inhibitor that mainly inhibits neutrophil elastase in the lungs. A variant of A1AT at the P1 position with methionine 358 to arginine (A1AT-Pittsburgh) is a rapid inhibitor of thrombin with greatly diminished anti-elastase activity. The P2 residue (position 357) of A1AT-Pittsburgh has been shown to play an important role in interactions with thrombin and kallikrein, but the role of P2 residue in wild-type A1AT has largely been unraveled. Here, we investigated the effects of P2 proline substitutions in wild-type A1AT on interactions with porcine pancreatic elastase (PPE) and human neutrophil elastase (HNE)...
2017: PloS One
https://www.readbyqxmd.com/read/28921890/phase-ii-study-of-dabigatran-in-children-with-venous-thrombosis-pharmacokinetics-safety-and-tolerabilty
#17
J M L Halton, M Albisetti, B Biss, L Bomgaars, M Brueckmann, S Gropper, R Harper, F Huang, M Luciani, H Maas, I Tartakovsky, L G Mitchell
BACKGROUND: The current standard-of-care treatments for pediatric venous thromboembolism (VTE) have limitations. Dabigatran etexilate (DE), a direct thrombin inhibitor, may offer an alternative therapeutic option. OBJECTIVES: To assess the pharmacokinetics (PK), pharmacodynamics (PD), safety and tolerability of DE oral liquid formulation (OLF) in pediatric patients with VTE. PATIENTS/METHODS: Patients who had completed planned treatment with low-molecular-weight heparin or oral anticoagulants for VTE were enrolled in two age groups (2-<12 and 1-<2 years) and received DE OLF based on an age- and weight-adjusted nomogram...
September 16, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28920104/variable-phenotypic-penetrance-of-thrombosis-in-adult-mice-after-tissue-selective-and-temporally-controlled-thbd-gene-inactivation
#18
Thijs E van Mens, Hai-Po H Liang, Sreemanti Basu, Irene Hernandez, Mark Zogg, Jennifer May, Min Zhan, Qiuhui Yang, Jamie Foeckler, Shawn Kalloway, Rashmi Sood, Caren Sue Karlson, Hartmut Weiler
Thrombomodulin (Thbd) exerts pleiotropic effects on blood coagulation, fibrinolysis, and complement system activity by facilitating the thrombin-mediated activation of protein C and thrombin-activatable fibrinolysis inhibitor and may have additional thrombin- and protein C (pC)-independent functions. In mice, complete Thbd deficiency causes embryonic death due to defective placental development. In this study, we used tissue-selective and temporally controlled Thbd gene ablation to examine the function of Thbd in adult mice...
June 27, 2017: Blood Advances
https://www.readbyqxmd.com/read/28918742/a-new-concept-of-action-of-hemostatic-proteases-on-inflammation-neurotoxicity-and-tissue-regeneration
#19
REVIEW
L R Gorbacheva, E V Kiseleva, I G Savinkova, S M Strukova
Key hemostatic serine proteases such as thrombin and activated protein C (APC) are signaling molecules controlling blood coagulation and inflammation, tissue regeneration, neurodegeneration, and some other processes. By interacting with protease-activated receptors (PARs), these enzymes cleave a receptor exodomain and liberate new amino acid sequence known as a tethered ligand, which then activates the initial receptor and induces multiple signaling pathways and cell responses. Among four PAR family members, APC and thrombin mainly act via PAR1, and they trigger divergent effects...
July 2017: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/28917645/anti-fibrinolytic-and-anti-microbial-activities-of-a-serine-protease-inhibitor-from-honeybee-apis-cerana-venom
#20
Jie Yang, Kwang Sik Lee, Bo Yeon Kim, Yong Soo Choi, Hyung Joo Yoon, Jingming Jia, Byung Rae Jin
Bee venom contains a variety of peptide constituents, including low-molecular-weight protease inhibitors. While the putative low-molecular-weight serine protease inhibitor Api m 6 containing a trypsin inhibitor-like cysteine-rich domain was identified from honeybee (Apis mellifera) venom, no anti-fibrinolytic or anti-microbial roles for this inhibitor have been elucidated. In this study, we identified an Asiatic honeybee (A. cerana) venom serine protease inhibitor (AcVSPI) that was shown to act as a microbial serine protease inhibitor and plasmin inhibitor...
September 14, 2017: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
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