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Coagulation Factor Concentrates

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https://www.readbyqxmd.com/read/28716211/to-serve-and-protect-the-modulatory-role-of-von-willebrand-factor-on-factor-viii-immunogenicity
#1
REVIEW
Robin B Hartholt, Alice S van Velzen, Ivan Peyron, Anja Ten Brinke, Karin Fijnvandraat, Jan Voorberg
Hemophilia A is a bleeding disorder characterized by the absence or dysfunction of blood coagulation factor VIII (FVIII). Patients are treated with regular infusions of FVIII concentrate. In response to treatment, approximately 30% of patients with severe hemophilia A develop inhibitory antibodies targeting FVIII. Both patient and treatment related risk factors for inhibitor development have been described. Multiple studies comparing the immunogenicity of recombinant and plasma-derived FVIII have yielded conflicting results...
July 4, 2017: Blood Reviews
https://www.readbyqxmd.com/read/28715680/response-surface-methodology-investigation-into-optimization-of-the-removal-condition-and-mechanism-of-cr-%C3%A2-by-na2so3-cao
#2
Shengxin Zhao, Zhonglin Chen, Jimin Shen, Jing Kang, Yanfeng Qu, Binyuan Wang, Xin Wang, Lie Yuan
The removal of Cr(Ⅵ) by chemical reduction-precipitation is widely applied in wastewater treatment plants. Nevertheless, the formation of Cr(OH)3 with gel properties has weak settlement performance, making it necessary to add a coagulant aid to reduce the settling time and improve the settling effect. In this investigation, a high concentration of Cr(Ⅵ) was removed using Na2SO3 as a reducing agent and CaO as a coagulant. An improved reduction and precipitation experiment was modeled by applying a three-factor central composite experimental design (CCD)...
July 14, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28706751/development-and-implementation-of-a-coagulation-factor-testing-method-utilizing-autoverification-in-a-high-volume-clinical-reference-laboratory-environment
#3
Paul W Riley, Benoit Gallea, Andre Valcour
BACKGROUND: Testing coagulation factor activities requires that multiple dilutions be assayed and analyzed to produce a single result. The slope of the line created by plotting measured factor concentration against sample dilution is evaluated to discern the presence of inhibitors giving rise to nonparallelism. Moreover, samples producing results on initial dilution falling outside the analytic measurement range of the assay must be tested at additional dilutions to produce reportable results...
2017: Journal of Pathology Informatics
https://www.readbyqxmd.com/read/28700408/three-versus-four-factor-prothrombin-complex-concentrates-for-factor-based-resuscitation-in-a-porcine-hemorrhagic-shock-model
#4
Donald Michael Moe, Michael Scott Lallemand, John Mason McClellan, Joshua Porter Smith, Shannon T Marko, Matthew J Eckert, Matthew J Martin
BACKGROUND: Bleeding is a leading cause of preventable death following severe injury. Prothrombin complex concentrates (PCC) treat inborn coagulation disorders and reverse oral anticoagulants, but are proposed for use in "factor-based" resuscitation strategies. Few studies exist for this indication in acidosis, or that compare 3-factor (3PCC) versus 4-factor (4PCC) products. We aimed to assess and compare their safety and efficacy in a porcine model of severe hemorrhagic shock and coagulopathy...
July 12, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28694557/overexpression-of-mir-24-is-involved-in-the-formation-of-hypocoagulation-state-after-severe-trauma-by-inhibiting-the-synthesis-of-coagulation-factor-x
#5
Lu-Jia Chen, Lian Yang, Xing Cheng, Yin-Kai Xue, Li-Bo Chen
BACKGROUND: Dysregulation of microRNAs may contribute to the progression of trauma-induced coagulopathy (TIC). We aimed to explore the biological function that miRNA-24-3p (miR-24) might have in coagulation factor deficiency after major trauma and TIC. METHODS: 15 healthy volunteers and 36 severe trauma patients (Injury Severity Score ≥ 16 were enrolled. TIC was determined as the initial international normalized ratio >1.5. The miR-24 expression and concentrations of factor X (FX) and factor XII in plasma were measured...
2017: Disease Markers
https://www.readbyqxmd.com/read/28692431/differing-mechanisms-of-thrombin-generation-in-live-haematological-and-solid-cancer-cells-determined-by-calibrated-automated-thrombography
#6
Mufuliat Adeola Adesanya, Anthony Maraveyas, Leigh Madden
: Calibrated automated thrombography (CAT) is emerging as a reliable tool for real-time estimation of thrombin generation potential. There is a clinical need for knowledge about the pathways underlying the thrombotic phenotype of different malignancies. Cells from solid (e.g. pancreatic cancer; n = 7) and malignant haematological cell lines (e.g. multiple myeloma; n = 5) were evaluated for thrombin generation, using CAT, with the addition of control plasma (NormTrol; Helena Biosciences, Gateshead, UK)) or plasma deficient in coagulation factors VII and XII...
July 7, 2017: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/28692110/plasma-carboxypeptidase-u-cpu-cpb2-tafia-generation-during-in-vitro-clot-lysis-and-its-interplay-between-coagulation-and-fibrinolysis
#7
Dorien Leenaerts, Jef Aernouts, Pieter Van Der Veken, Yani Sim, Anne-Marie Lambeir, Dirk Hendriks
Carboxypeptidase U (CPU, CPB2, TAFIa) is a basic carboxypeptidase that is able to attenuate fibrinolysis. The inactive precursor procarboxypeptidase U is converted to its active form by thrombin, the thrombin-thrombomodulin complex or plasmin. The aim of this study was to investigate and characterise the time course of CPU generation in healthy individuals. In plasma of 29 healthy volunteers, CPU generation was monitored during in vitro clot lysis. CPU activity was measured by means of an enzymatic assay that uses the specific substrate Bz-o-cyano-Phe-Arg...
July 6, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28687347/hestat-study-protocol-for-a-phase-ii-iii-randomized-placebo-controlled-single-blind-study-to-evaluate-the-new-hemostatic-agent-tt-173-in-total-knee-arthroplasty
#8
Aránzazu Gonzalez-Osuna, Sebastián Videla, Esther Cánovas, Gerard Urrútia, Santiago Rojas, Ramón López, Jesús Murat, Xavier Aguilera
BACKGROUND: Several hemostatic treatments intended to reduce the bleeding associated to total knee arthroplasty have been investigated with varying degrees of success. TT-173 is a new topical agent based on recombinant tissue factor that activates the extrinsic pathway of coagulation. This trial aim is to evaluate the efficacy and safety of TT-173 in total knee arthroplasty. METHODS/DESIGN: This is a phase II/III, sequential, simple blind, randomized, multicenter, placebo controlled and parallel clinical trial that will recruit 189 evaluable patients...
July 4, 2017: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/28682477/preclinical-safety-and-efficacy-of-andexanet-alfa-in-animal-models
#9
G Lu, S J Hollenbach, D C Baker, S Tan, A Hutchaleelaha, J T Curnutte, P B Conley
BACKGROUND: Andexanet is a recombinant modified form of factor Xa (FXa), designed to bind to and reverse the anticoagulant activity of FXa inhibitors. OBJECTIVES: To evaluate the ability of andexanet to reverse the anticoagulant activity of rivaroxaban, and assess its pharmacokinetics (PK) and toxicity in animal models. METHODS: The effects of andexanet on blood loss, anti-FXa activity, rivaroxaban unbound plasma concentrations, and other coagulation parameters were assessed in a rabbit liver laceration 'treatment' model...
July 6, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28679481/activation-of-the-coagulation-cascade-in-patients-with-scrub-typhus
#10
Hee-Jeong Lee, Chi-Young Park, Sang-Gon Park, Na-Ra Yoon, Dong-Min Kim, Choon-Hae Chung
This retrospective study aimed to evaluate the levels of coagulation factors and presence of disseminated intravascular coagulation (DIC) in patients with scrub typhus. We included patients confirmed to have scrub typhus at the Chosun University Hospital between September 2004 and December 2009. The DIC scores were evaluated in 365 patients and 36 healthy controls. The median concentrations of fibrinogen, d-dimer, and fibrin/fibrinogen degradation products (FDP) were compared between patients and healthy controls (p<0...
June 19, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28678049/impact-of-abcb1-abcg2-and-cyp3a5-polymorphisms-on-plasma-trough-concentrations-of-apixaban-in-japanese-patients-with-atrial-fibrillation
#11
Satoshi Ueshima, Daiki Hira, Ryo Fujii, Yuuma Kimura, Chiho Tomitsuka, Takuya Yamane, Yohei Tabuchi, Tomoya Ozawa, Hideki Itoh, Minoru Horie, Tomohiro Terada, Toshiya Katsura
OBJECTIVES: During anticoagulant therapy, major bleeding is one of the most severe adverse effects. This study aimed to evaluate the relationships between ABCB1, ABCG2, and CYP3A5 polymorphisms and plasma trough concentrations of apixaban, a direct inhibitor of coagulation factor X. PATIENTS AND METHODS: A total of 70 plasma concentrations of apixaban from 44 Japanese patients with atrial fibrillation were analyzed. In these analyses, the plasma trough concentration/dose (C/D) ratio of apixaban was used as a pharmacokinetic index and all data were stratified according to the presence of ABCB1 (ABCB1 1236C>T, 2677G>T/A, and 3435C>T), ABCG2 (ABCG2 421C>A), and CYP3A5 (CYP3A5*3) polymorphisms...
July 3, 2017: Pharmacogenetics and Genomics
https://www.readbyqxmd.com/read/28674956/preparation-of-modified-waterworks-sludge-particles-as-adsorbent-to-enhance-coagulation-of-slightly-polluted-source-water
#12
Wei Chen, Xiaohong Gao, Hang Xu, Kang Wang, Taoyuan Chen
Without treatment, waterworks sludge is ineffective as an adsorbent. In this study, raw waterworks sludge was used as the raw material to prepare modified sludge particles through high-temperature calcination and alkali modification. The feasibility of using a combination of modified particles and polyaluminum chloride (PAC) as a coagulant for treatment of slightly polluted source water was also investigated. The composition, structure, and surface properties of the modified particles were characterized, and their capabilities for removing ammonia nitrogen and turbidity were determined...
July 4, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28674874/a-protocol-for-the-preparation-of-cryoprecipitate-and-cryo-depleted-plasma-for-proteomic-studies
#13
Rosemary L Sparrow, Richard J Simpson, David W Greening
Cryoprecipitate is a concentrate of high-molecular-weight plasma proteins that precipitate when frozen plasma is slowly thawed at 1-6 °C. The concentrate contains factor VIII (antihemophilic factor), von Willebrand factor (vWF), fibrinogen, factor XIII, fibronectin, and small amounts of other plasma proteins. Clinical grade preparations of cryoprecipitate are mainly used to treat fibrinogen deficiency caused by acute bleeding or functional abnormalities of the fibrinogen protein. In the past, cryoprecipitate was used to treat von Willebrand disease and hemophilia A (factor VIII deficiency), but the availability of more highly purified coagulation factor concentrates or recombinant protein preparations has superseded the use of cryoprecipitate for these coagulopathies...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28666312/antithrombin-iii-administration-for-portal-vein-thrombosis-in-patients-with-liver-disease-a-randomized-double-blind-controlled-trial
#14
Hisashi Hidaka, Shigehiro Kokubu, Takahiro Sato, Shinji Katsushima, Namiki Izumi, Takumi Igura, Shingo Asahara, Kazuo Notsumata, Yukio Osaki, Keiji Tsuji, Hirofumi Kawanaka, Tomohiko Akahoshi, Shozo Hirota, Shoichi Matsutani
AIM: Portal vein thrombosis (PVT) is one of the most critical disorders in liver disease patients. These patients have the imbalance of coagulation and coagulation inhibition resulting from decreased levels of coagulation inhibitory factors, such as protein C, protein S, and antithrombin III (AT-III). We designed this randomized, double-blind, placebo-controlled trial comparing the safety and efficacy of AT-III administration for PVT in patients with those who received no treatment. METHODS: Eligible patients were diagnosed with the association of thrombus, without tumor thrombus, thrombus in more than 50% of the cross-sectional lumen of the portal vein...
June 30, 2017: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/28663071/outside-in-inside-out-proteomic-analysis-of-endothelial-stress-mediated-by-7-ketocholesterol
#15
Lívia Rosa-Fernandes, Luciana M F Maselli, Nair Y Maeda, Giuseppe Palmisano G, Sergio P Bydlowski
Oxysterols are cholesterol oxidation products formed through enzymatic or autoxidation mechanisms. 7-ketocholeterol (7KC) is one of most abundant oxysterols found in atherosclerotic lesions. Its role in atherosclerosis pathogenesis has been broadly studied in a variety of models. The arterial microenvironment is a multicellular dynamic compartment that, among other systemic factors, is continuously stimulated by 7KC. Endothelial cells have a key role on that environment, being in intimate contact with both the blood stream and the vessel wall, the site of disease origin...
June 26, 2017: Chemistry and Physics of Lipids
https://www.readbyqxmd.com/read/28661087/efficacy-of-substance-removal-by-immunoadsorption-with-a-selective-plasma-separator
#16
Norio Hanafusa, Hiroko Yamamoto, Masaki Tamachi, Toshihiro Torato, Satoko Sakurai, Ken Tsuchiya, Kosaku Nitta, Masaomi Nangaku
Immunoadsorption with a tryptophan-conjugated column has a limited capacity and reduces fibrinogen. We speculated that immunoadsorption with a selective plasma separator has higher efficiency in removing immunoglobulins than ordinary immunoadsorption without affecting coagulation factors. This study investigated the efficacy of immunoadsorption with a selective plasma separator in vitro. The sieving coefficients, the pool concentration, and the adsorbed amount were investigated serially with up to 5 L of processed plasma...
June 2017: Therapeutic Apheresis and Dialysis
https://www.readbyqxmd.com/read/28655456/reflections-on-multiple-strategies-to-reduce-transfusion-in-cancer-patients-a-joint-narrative
#17
REVIEW
Hadi Goubran, Jerard Seghatchian, Oksana Prokopchuk-Gauk, Julia Radosevic, Waleed Sabry, Nayyer Iqbal, Thierry Burnouf
Transfusion of red blood cells, platelets and plasma is widely used in the management of anemia and coagulopathy in cancer patients undergoing surgery, chemotherapy, and radiation. The decision to transfuse should not be made lightly as exposure to transfused blood, whether from an allogeneic or even autologous source, is not without risk and the long-term effect of blood transfusion on cancer outcomes remains questionable. Recognition of anemia associated with nutritional deficiency should be promptly corrected while avoiding the use of erythropoiesis stimulating agents...
June 2017: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28652957/a-retrospective-study-of-acute-renal-failure-in-children-its-incidence-etiology-complications-and-prognosis
#18
Kadar Ismail Hassan, Jama Hodan M, Chunfu Li
BACKGROUND: Acute renal failure (ARF) developed due to various causes and may lead to significant morbidity and mortality among pediatric patients. OBJECTIVES: The study was conducted to determine the incidence, etiology, outcome of treatment and clinical presentation of ARF in pediatric patients in Somalia. METHODS: Comprehensive case history of 39 pediatric patients below 12 years of age, admitted with renal diseases in four tertiary care hospitals in Hargeisa and Borama cities in Somalia during December 2015 to November 2016...
May 25, 2017: Curēus
https://www.readbyqxmd.com/read/28632435/relative-effects-of-plasma-fibrinogen-concentrate-and-factor-xiii-on-rotem-coagulation-profiles-in-an-in-vitro-model-of-massive-transfusion-in-trauma
#19
David E Schmidt, Märit Halmin, Agneta Wikman, Anders Östlund, Anna Ågren
Massive traumatic haemorrhage is aggravated through the development of trauma-induced coagulopathy, which is managed by plasma transfusion and/or fibrinogen concentrate administration. It is yet unclear whether these treatments are equally potent in ensuring adequate haemostasis, and whether additional factor XIII (FXIII) administration provides further benefits. In this study, we compared ROTEM whole blood coagulation profiles after experimental massive transfusion with different transfusion regimens in an in vitro model of dilution- and transfusion-related coagulopathy...
June 20, 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/28632184/crude-fucoidan-extracts-impair-angiogenesis-in-models-relevant-for-bone-regeneration-and-osteosarcoma-via-reduction-of-vegf-and-sdf-1
#20
Fanlu Wang, Harald Schmidt, Dijana Pavleska, Thees Wermann, Andreas Seekamp, Sabine Fuchs
The marine origin polysaccharide fucoidan combines multiple biological activities. As demonstrated by various studies in vitro and in vivo, fucoidans show anti-viral, anti-tumor, anti-oxidant, anti-inflammatory and anti-coagulant properties, although the detailed molecular action remains to be elucidated. The aim of the present study is to assess the impact of crude fucoidan extracts, on the formation of vascular structures in co-culture models relevant for bone vascularization during bone repair and for vascularization processes in osteosarcoma...
June 20, 2017: Marine Drugs
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