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fibrinogen degradation

Francisco Martín-Saavedra, Clara Escudero-Duch, Martín Prieto, Silvia Sánchez-Casanova, Daniel López, Manuel Arruebo, Richard Voellmy, Jesús Santamaría, Nuria Vilaboa
CuS nanoparticles (CuSNP) are degradable, readily prepared, inexpensive to produce and efficiently cleared from the body. In this work, we explored the feasibility of CuSNP to function as degradable near infrared (NIR) nanotransducers within fibrin-based cellular scaffolds. To prepare NIR-responsive CuSNP hydrogels, fibrinogen was dissolved in cell culture medium and supplemented with aqueous dispersions of CuSNP. Fibrinogen polymerization was catalyzed by the addition of thrombin. In some experiments, HUVEC, C3H/10T1/2 or C3H/10T1/2-fLuc cells, that harbor a heat-activated and rapamycin-dependent gene switch for regulating the expression of firefly luciferase transgene expression, were incorporated to the sol phase of the hydrogel...
August 8, 2018: Acta Biomaterialia
Barbara M Zietek, Morwarid Mayar, Julien Slagboom, Ben Bruyneel, Freek J Vonk, Govert W Somsen, Nicholas R Casewell, Jeroen Kool
To better understand envenoming and to facilitate the development of new therapies for snakebite victims, rapid, sensitive, and robust methods for assessing the toxicity of individual venom proteins are required. Metalloproteinases comprise a major protein family responsible for many aspects of venom-induced haemotoxicity including coagulopathy, one of the most devastating effects of snake envenomation, and is characterized by fibrinogen depletion. Snake venoms are also known to contain anti-fibrinolytic agents with therapeutic potential, which makes them a good source of new plasmin inhibitors...
August 9, 2018: Analytical and Bioanalytical Chemistry
Peter Lin, Tsung-Liang Chuang, Paul Z Chen, Chii-Wann Lin, Frank X Gu
Surface fouling remains an exigent issue for many biological implants. Unwanted solutes adsorb to reduce device efficiency and hasten degradation while increasing the risks of microbial colonization and adverse inflammatory response. To address unwanted fouling in modern implants in vivo, surface modification with antifouling polymers has become indispensable. Recently, zwitterionic self-assembled monolayers, which contain two or more charged functional groups but are electrostatically neutral and form highly hydrated surfaces, have been the focus of many antifouling coatings...
August 13, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
Yusuke S Hori, Yuki Ebisudani, Mizuho Aoi, Toru Fukuhara
BACKGROUND: Previous studies reported an association of hematologic parameters including white blood cells, neutrophil, eosinophils, or coagulation-related factors with prognosis in cerebrovascular disorders. However, an association of recurrence rate with serum coagulation-related factors (e.g., D-dimer or fibrinogen degradation products [FDP]) in chronic subdural hematoma (CSDH) is unclear. METHODS: A total 92 patients who experienced first-time CSDH treated with burr-hole hematoma evacuation were included in this study...
July 16, 2018: World Neurosurgery
Naihao Lu, Yinhua Sui, Yun Ding, Rong Tian, Yi-Yuan Peng
Carbon nanotubes are widely used in the area of biomedicine, and the binding of protein to carbon nanotubes are believed to play an important role in the potential cytotoxicity of nanomaterials. In this work, we investigated the effects of human fibrinogen-surface coatings on the biodegradation and cytotoxicity of carboxylated single-walled carbon nanotubes (SWCNTs). It was found that the electrostatic and π-π stacking interactions might be the crucial factors in stabilizing the binding of fibrinogen with SWCNTs by both theoretical and experimental approaches...
July 17, 2018: Journal of Materials Science. Materials in Medicine
Sonja E M Boas, Joao Carvalho, Marloes van den Broek, Ester M Weijers, Marie-José Goumans, Pieter Koolwijk, Roeland M H Merks
In experimental assays of angiogenesis in three-dimensional fibrin matrices, a temporary scaffold formed during wound healing, the type and composition of fibrin impacts the level of sprouting. More sprouts form on high molecular weight (HMW) than on low molecular weight (LMW) fibrin. It is unclear what mechanisms regulate the number and the positions of the vascular-like structures in cell cultures. To address this question, we propose a mechanistic simulation model of endothelial cell migration and fibrin proteolysis by the plasmin system...
July 2018: PLoS Computational Biology
Zheng Chen, Dong-Hua Shao, Zu-Min Mao, Lei-Lei Shi, Xiao-Dong Ma, Da-Peng Zhang
BACKGROUND: Dexmedetomidine can inhibit the perioperative stress response, which plays an important role in postoperative hypercoagulability. This study aimed to investigate whether dexmedetomidine could attenuate the activation of postoperative coagulation. METHODS: Patients undergoing open radical gastrectomy under total intravenous anesthesia were randomly allocated to the control group (group Con) and the dexmedetomidine group (group Dex). Dexmedetomidine was intravenously infused at 0...
July 2018: Medicine (Baltimore)
Keita Sadatani, Kenji Niiya, Hiroshi Sonobe, Kazunori Sasaki, Ichiyo Miyamoto, Mari Nakano, Toshiyuki Habara, Toru Kiguchi
We report a unique case of a B-cell lymphoma patient in whom IgM monoclonal gammopathy resulted in a prolonged activated partial thromboplastin time (APTT) and false-positive results for fibrinogen and fibrin degradation products (FDPs). An 86-year-old man was referred to our hospital for further examination of abnormal cells in his peripheral blood. Laboratory data upon admission revealed an elevation of monoclonal IgM, presence of FDPs and marked prolongation of APTT (>180 s). Bone marrow examination revealed a predominant involvement of B lymphoma cells...
May 2018: Annals of Clinical and Laboratory Science
Kristian A Torres-Bonilla, Débora Andrade-Silva, Solange M T Serrano, Stephen Hyslop
In this work, we examined the proteolytic and phospholipase A2 (PLA2 ) activities of venom from the opisthoglyphous colubrid Pseudoboa neuwiedii. Proteolytic activity (3 and 10 μg of venom) was comparable to that of Bothrops neuwiedii venom but less than Bothrops atrox. This activity was inhibited by EDTA and 1,10-phenanthroline but only slightly affected (≤30% inhibition) by PMSF and AEBSF, indicating it was mediated by snake venom metalloproteinases (SVMPs). The pH and temperature optima for proteolytic activity were 8...
June 29, 2018: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
Mikkel Bo Brent, Jesper Skovhus Thomsen, Annemarie Brüel
Thrombin is a key component in the coagulation cascade where it converts factor V, VIII, XI, and fibrinogen. In addition to the abundant production of thrombin in the liver, osteoclasts synthesize and secrete thrombin as well. Osteoblasts express thrombin receptors, and it has been reported that thrombin stimulates the expression of RANKL relatively to OPG, resulting in greater osteoclast activation and bone degradation. Pradaxa (dabigatran etexilate, DE) is a new anticoagulant, which has recently been approved for clinical use...
June 2018: Bone Reports
Lichun Zhang, Yu Wang, Jun Han, Haitao Shen, Min Zhao, Shijie Cai
Acute pancreatitis in pregnancy (APIP) is a rare but dangerous complication. APIP has common symptoms with acute abdomen. Assessment of an acute abdomen is more complicated during pregnancy because the gravid uterus could mask most of symptomatic signs. It has been a challenge to diagnose APIP by physical examination or diagnostic imaging. Case studies on APIP are also limited for analysis on the risk factors associated with the disease. This retrospective study evaluated a series of risk factors from a relatively substantial number of APIP cases to determine early predictors or prognosis markers for APIP...
June 2018: Medicine (Baltimore)
Maurizio Viale, Massimiliano Monticone, Irena Maric, Valentina Giglio, Aldo Profumo, Anna Aprile, Michele Cilli, Maria Luisa Abelmoschi, Mattia Rocco
BACKGROUND: Local delivery of anticancer drugs represents a desirable type of treatment. Nevertheless, characteristics such as availability, biocompatibility, ease of operation, and efficacy sometimes represent difficult to overcome hurdles. Fibrin gels (FBGs) may be attractive biomaterials for local treatment when loaded with different chemotherapeutics or with polymer-anticancer-drug conjugates and nanoparticles. These components, linked together, might represent candidates to counteract local recurrences or reduce the volume of inoperable tumors...
February 21, 2018: Pharmacological Reports: PR
Shun-Ichi Nihei, Hideaki Arai, Takayuki Uchida, Ayako Kanazawa, Takeru Endo, Ken Otsuji, Nobuya Harayama, Keiji Aibara, Masayuki Kamochi
A post-marketing surveillance study reported fatalities following tissue plasminogen activator administration in acute aortic dissection (AAD) with the symptoms of acute ischemic stroke (AIS) patients. Therefore, it is important to discriminate AAD from AIS. The present study aimed to investigate whether fibrinogen/fibrin degradation products (FDP) value can be useful in differential diagnosis between AAD and AIS. The study group comprised 20 AAD patients (10 men and 10 women; age 63.9 ± 13.6 years) and 159 AIS patients (91 men and 68 women; age 74...
2018: Journal of UOEH
Christopher Howell, James R Smith, Janis K Shute
BACKGROUND: Viral infection of the bronchial epithelium disrupts the barrier properties of the epithelium in healthy individuals and those with lung disease. Repair of the bronchial epithelium is dependent of the formation of a provisional fibrin matrix and migration of epithelial cells to cover denuded areas, followed by proliferation and differentiation. OBJECTIVE: The objective was to test the hypothesis that poly I:C, a model of viral infection, limits epithelial repair through the stimulated release of matrix metalloproteinase-13 (MMP-13)...
June 20, 2018: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
Samiullah Khan, Aqsa Gul, Rabia Noreen, Muhammad Ashraf, Sohail Ahmad, Sattar Bakhsh Awan, Zahid Rasool Niazi, Naqab Khan
BACKGROUND: Thrombus is composed of two main substances i.e. red blood cells and aggregated platelets which make a web of inter-connected fibrin proteins. During injury it prevents bleeding, so it is very useful but it can be very dangerous if it is produced in healthy blood vessels and block the blood flow through it. Mural thrombi attaches with the blood vessels but in most cases do not block it completely. Venoms are an incredible source of peptides having amazing bioactivities with varying number of amino acid residues...
June 13, 2018: Protein and Peptide Letters
Meiling Luo, Aiqiu Wei, Liqun Xiang, Jie Yan, Lin Liao, Xuelian Deng, Donghong Deng, Peng Cheng, Faquan Lin
We found a heterozygous dysfibrinogenemia caused by a substitution of AαArg16Cys. The proband suffered multiple cerebral infarctions. Routine coagulation tests revealed a prolonged thrombin time. The fibrinogen levels in the functional assays were considerably lower than the levels in the immunological assays. The polymerization of the purified fibrinogen was strongly impaired in the presence of calcium. As previously observed in other heterozygous Aα R16C variants, the release rate and amount of fibrinopeptide A (FPA) were lower in the proband than those in normal controls...
June 5, 2018: Journal of Thrombosis and Thrombolysis
Kentaro Nakano, Kumiya Sugiyama, Hideyuki Satoh, Sadaaki Shiromori, Kei Sugitate, Hajime Arifuku, Naruo Yoshida, Hiroyoshi Watanabe, Shingo Tokita, Tomoshige Wakayama, Masamitsu Tatewaki, Ryosuke Souma, Kenya Koyama, Hirokuni Hirata, Yasutsugu Fukushima
BACKGROUND: The mortality rate from disseminated intravascular coagulation (DIC) is higher in patients with lung cancer than in non-lung cancer patients. Moreover, the prevalence of DIC varies among the pathologic types of lung cancer. This study analyzed the relationship between coagulation factors and the pathologic types of lung cancer. METHODS: Twenty-six patients with progressive, inoperable stage IIB or higher lung cancer (20 men, 6 women; mean age 71 years; 11 Adeno, 10 squamous cell carcinoma, and 5 small cell carcinoma) and five healthy volunteers without respiratory disease (3 men, 2 women; mean age 72 years) were enrolled in the study...
May 31, 2018: Thoracic Cancer
Bo Tian, Chunfeng Song, Hui Li, Wenqian Zhang, Qirui Chen, Shuo Chen, Yili Fu, Xiaoxing Hu, Bin You, Tong Li, Bin Hu, Shengcai Hou
Background: The high incidence of venous thromboembolism (VTE) has been perceived in post thoracic surgery patients. However, the significance of perioperative coagulation and fibrinolysis related parameters after lung surgery for VTE predicting is not clear. To investigate that, we conducted a prospective single center study. Methods: A total of 111 patients undergoing lung surgery were enrolled in this study, included 52 primary lung cancer patients and 59 benign lung disease patients from July 2016 to March 2017...
April 2018: Journal of Thoracic Disease
Susanna Solbak, Steven E Epstein, Kate Hopper
Objectives The objective of this study was to evaluate the effect of different needle sizes used to obtain blood via jugular venipuncture in cats on routine measures of hemostasis. Methods This was a prospective, observational, randomized, clinical study carried out at a university teaching hospital. Twenty healthy, client-owned cats were used. Results Each cat had blood collected via direct venipuncture from both jugular veins. Sampling of the right and left jugular vein was randomized to be collected with either a 22 G or a 25 G needle, respectively, and routine coagulation variables and platelet count were performed on all samples...
May 1, 2018: Journal of Feline Medicine and Surgery
Osamu Kumano, Masahiro Ieko, Yutaka Komiyama, Sumiyoshi Naito, Mika Yoshida, Nobuhiko Takahashi, Kazumasa Ohmura, Junki Hayasaki, Mineji Hayakawa
BACKGROUND: Laboratory determination of fibrin/fibrinogen degradation products (FDP) levels, along with that of the D-dimer, is important for assessing the fibrinolytic situation. Recently, we developed a new FDP reagent "Lias Auto P-FDP", which can detect various FDP fragments. The purpose of this study was to evaluate the basic performance of the newly developed Lias Auto P-FDP and compare it with Lias Auto D-Dimer Neo assay. METHODS: The within-run precision of Lias Auto P-FDP and Lias Auto D-Dimer was determined 20 times in low and high value controls...
April 1, 2018: Clinical Laboratory
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