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Thrombosis models

Kelly J McKelvey, Vanessa M Yenson, Anthony W Ashton, Jonathan M Morris, Sharon A McCracken
Inbred strains of mice are powerful models for understanding human pregnancy complications. For example, the exclusive mating of CBA/J females to DBA/2J males increases fetal resorption to 20-35% with an associated decline in placentation and maintenance of maternal Th1 immunity. More recently other complications of pregnancy, IUGR and preeclampsia, have been reported in this model. The aim of this study was to qualify whether the CBA/CaH substrain female can substitute for CBA/J to evoke a phenotype of embryonic/fetal mortality and IUGR...
October 21, 2016: Scientific Reports
Vikrant Rai, Poonam Sharma, Swati Agrawal, Devendra K Agrawal
Heart disease causing cardiac cell death due to ischemia-reperfusion injury is a major cause of morbidity and mortality in the United States. Coronary heart disease and cardiomyopathies are the major cause for congestive heart failure, and thrombosis of the coronary arteries is the most common cause of myocardial infarction. Cardiac injury is followed by post-injury cardiac remodeling or fibrosis. Cardiac fibrosis is characterized by net accumulation of extracellular matrix proteins in the cardiac interstitium and results in both systolic and diastolic dysfunctions...
October 20, 2016: Molecular and Cellular Biochemistry
Ren-Chieh Wu, Ping-Tse Chou, Li-Kuang Chen
BACKGROUND: Thrombosis and coagulopathy are the commonest hematological manifestations of envenomation of Russell's viper venom (RVV). Factor X is activated by a factor X-activating enzyme from Russell's viper venom (RVV-X) to start the coagulation cascade. We established an animal model with local ischemic effects induced by RVV. We tried to treat RVV envenomation with antiplatelets and anticoagulants without recourse to antivenom. METHODS: RVV was injected into the foot pad of mice...
2016: Thrombosis Journal
Salvatore Santo Signorelli, Fiore Valerio, Castrogiovanni Davide, Gea Oliveri Conti, Fiore Maria, Morana Ignazio, Ferrante Margherita
Study on 295 consecutive medical patients to evaluate the potential of routine blood tests to identify the risk of deep vein thrombosis (DVT). The tests included in a DVT risk stratification model system were erythrocyte sedimentation rate, antithrombin III, C-reactive protein, D-dimer, and N-terminal pro-brain natriuretic peptide. The DVT risk stratification system was moderately prognostic (area under the curve: 0.838; 95% confidence interval: 0.771-0.904; P < .001), whereas its performance was as follows-sensitivity, 100%; specificity, 20%; positive predictive value, 21%; and negative predictive value, 100%...
October 20, 2016: Angiology
Pasquale Ambrosino, Luciano Tarantino, Giovanni Di Minno, Mariano Paternoster, Vincenzo Graziano, Maurizio Petitto, Aurelio Nasto, Matteo Nicola Dario Di Minno
Some studies suggest that patients with cirrhosis have an increased risk of deep venous thrombosis (DVT) and pulmonary embolism (PE). Unfortunately, available data on this association are contrasting. It was the objective of this study to perform a systematic review and meta-analysis of literature to evaluate the risk of venous thromboembolism (VTE) associated with cirrhosis. Studies reporting on VTE risk associated with cirrhosis were systematically searched in the PubMed, Web of Science, Scopus and EMBASE databases...
October 20, 2016: Thrombosis and Haemostasis
John H Griffin, Laurent O Mosnier, José A Fernández, Berislav V Zlokovic
APC (activated protein C), derived from the plasma protease zymogen, is antithrombotic and anti-inflammatory. In preclinical injury models, recombinant APC provides neuroprotection for multiple injuries, including ischemic stroke. APC acts directly on brain endothelial cells and neurons by initiating cell signaling that requires multiple receptors. Two or more major APC receptors mediate APC's neuroprotective cell signaling. When bound to endothelial cell protein C receptor, APC can cleave protease-activated receptor 1, causing biased cytoprotective signaling that reduces ischemia-induced injury...
October 6, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
Mizuho Nosaka, Yuko Ishida, Akihiko Kimura, Takashi Kawaguchi, Hiroki Yamamoto, Yumi Kuninaka, Toshikazu Kondo
Deep vein thrombi are dissolved after fibrosis process along with an increase of thrombus age. Fibrocytes are circulating bone marrow-derived cells with mesenchymal features that potentially have a unique and critical function in fibrosis. In this study, a double-color immunofluorescence analysis was carried out by using anti-CD45 and anti-collagen type I antibodies to examine the time-dependent appearance of fibrocytes in the murine model of stasis-induced deep vein thrombosis. The thrombus ages were 1, 3, 5, 7, 10, 14, and 21 days...
October 18, 2016: International Journal of Legal Medicine
Wenyi Tang, James Yeh, Jian Chen, Mao Liu, Jianting Ke, Guangyi Tan, Xiufang Lin, Wei Wu
BACKGROUND: The potential benefits and risks of extended thienopyridine therapy beyond 12 months after drug-eluting stent (DES) implantation remain unclear. METHODS: Randomized controlled trials (RCTs) were searched in PubMed, EMBASE, the Cochrane Library and China National Knowledge Infrastructure databases. The adverse clinical endpoints were compared between 12 months group (aspirin alone) and >12 months group (additional thienopyridine plus aspirin after 12-month dual antiplatelet therapy)...
October 2016: Cardiovascular Diagnosis and Therapy
K Kramkowski, A Leszczynska, K Przyborowski, B Proniewski, N Marcinczyk, U Rykaczewska, D Jarmoc, E Chabielska, S Chlopicki
In humans, short-term supplementation with nitrate is hypotensive and inhibits platelet aggregation via an nitric oxide (NO)-dependent mechanism. In the present work, we analyzed whether short-term treatment with nitrate induces antithrombotic effects in rats and mice. Arterial thrombosis was evoked electrically in a rat model in which renovascular hypertension was induced by partial ligation of the left renal artery. In mice expressing green fluorescent protein, laser-induced thrombosis was analyzed intravitally by using confocal microscope...
October 14, 2016: Naunyn-Schmiedeberg's Archives of Pharmacology
Maria Bruzelius, Maria Jesus Iglesias, Mun-Gwan Hong, Laura Sanchez-Rivera, Beata Gyorgy, Juan Carlos Souto, Mattias Frånberg, Claudia Fredolini, Rona J Strawbridge, Margareta Holmström, Anders Hamsten, Mathias Uhlén, Angela Silveira, Jose Manuel Soria, David M Smadja, Lynn M Butler, Jochen M Schwenk, Pierre-Emmanuel Morange, David-Alexandre Trégouët, Jacob Odeberg
There is a clear clinical need for high specificity plasma biomarkers for predicting risk of venous thromboembolism (VTE), but thus far such markers have remained elusive. Utilising affinity reagents from the human protein atlas (HPA) project and multiplexed immuoassays we extensively analysed plasma samples from two individual cohorts to identify candidate protein markers associated with VTE risk. We screened plasma samples from 88 VTE cases and 85 matched controls, collected as part of the Swedish 'Venous Thromboembolism Biomarker Study' (VEBIOS), using suspension bead arrays composed of 755 antibodies targeting 408 candidate proteins...
October 14, 2016: Blood
Marcus J Goudie, Benjamin M Brainard, Chad W Schmeidt, Hitesh Handa
Infection and thrombosis are the two leading complications associated with blood contacting medical devices, and have led to active materials that can delivery antibiotics or antithrombotic agents. Two key characteristics of these materials are the ability to produce controlled delivery, as well as minimal systemic delivery of the agent outside of the device site. Nitric oxide (NO) releasing materials are attractive as NO plays pivotal roles in the body's natural defense against bacterial infection, as well as regulation of platelet adhesion and activation...
October 14, 2016: Journal of Biomedical Materials Research. Part A
Omar D Borjas-Almaguer, Carlos A Cortez-Hernández, Emmanuel I González-Moreno, Francisco J Bosques-Padilla, José A González-González, Aldo A Garza, Juan A Martínez-Segura, Diego García-Compean, Juan V Alejandre-Loya, Jesús García-García, Guillermo Delgado-García, Héctor J Maldonado-Garza
:  Background & Aims. It is unclear whether portal vein thrombosis (PVT) unrelated to malignancy is associated with reduced survival or it is an epiphenomenon of advanced cirrhosis. The objective of this study was to assess clinical outcome in cirrhotic patients with PVT not associated with malignancy and determine its prevalence. MATERIAL AND METHODS: Retrospective search in one center from June 2011 to December 2014. RESULTS: 169 patients, 55 women and 114 men, median age 54 (19-90) years...
November 2016: Annals of Hepatology
Ursula I Tuor, Min Qiao, Manasi Sule, Melissa Morgunov, Tadeusz Foniok
Stroke is a major cause of disability in adults and children. Recently, we have developed an adult rat model of minor stroke containing a peri-infarct region with a modest T2 increase and mild ischemic damage. We hypothesized that a neonatal minor stroke with mild peri-ischemic changes could also be produced, but with potential ontogenic differences. Using our minor photothrombosis method, we produced a range of severities of ischemic lesions (mini, minor, moderate and severe) within magnetic resonance imaging (MRI) slices of adult and neonatal rats...
October 12, 2016: NMR in Biomedicine
Jing Zhou, Lu Ke, Dongliang Yang, Yizhe Chen, Gang Li, Zhihui Tong, Weiqin Li, Jieshou Li
BACKGROUND: Splanchnic venous thrombosis (SVT) is a relatively rare but important complication of necrotizing acute pancreatitis (NAP). Clinical manifestations and severity of this complication in different patients vary greatly, ranging from mild abdominal discomfort even asymptomatic to lethal gastrorrhagia or hepatic failure. The aim of the present study was to develop a model to predict the clinical manifestations of SVT in NAP patients. METHODS: This retrospective cohort study was conducted in the surgical intensive care unit (SICU) of Jinling Hospital...
October 3, 2016: Pancreatology: Official Journal of the International Association of Pancreatology (IAP) ... [et Al.]
Yu Shrike Zhang, Farideh Davoudi, Philipp Walch, Amir Manbachi, Xuan Luo, Valeria Dell'Erba, Amir K Miri, Hassan Albadawi, Andrea Arneri, Xiaoyun Li, Xiaoying Wang, Mehmet Remzi Dokmeci, Ali Khademhosseini, Rahmi Oklu
Pathologic thrombosis kills more people than cancer and trauma combined; it is associated with significant disability and morbidity, and represents a major healthcare burden. Despite advancements in medical therapies and imaging, there is often incomplete resolution of the thrombus. The residual thrombus can undergo fibrotic changes over time through infiltration of fibroblasts from the surrounding tissues and eventually transform into a permanent clot often associated with post-thrombotic syndrome. In order to understand the importance of cellular interactions and the impact of potential therapeutics to treat thrombosis, an in vitro platform using human cells and blood components would be beneficial...
October 18, 2016: Lab on a Chip
Divya Ramchandani, Dusten Unruh, Clayton S Lewis, Vladimir Y Bogdanov, Georg F Weber
Molecules of the coagulation pathway predispose patients to cancer-associated thrombosis and also trigger intracellular signaling pathways that promote cancer progression. The primary transcript of tissue factor, the main physiologic trigger of blood clotting, can undergo alternative splicing yielding a secreted variant, termed asTF (alternatively spliced tissue factor). asTF is not required for normal hemostasis, but its expression levels positively correlate with advanced tumor stages in several cancers, including pancreatic adenocarcinoma...
October 10, 2016: Laboratory Investigation; a Journal of Technical Methods and Pathology
Siavash Piran, Sam Schulman
INTRODUCTION: The true incidence of venous thromboembolism (VTE) in patients with acute spinal cord injury (SCI) is unclear. There are limited data on the risk factors associated with VTE in patients with an acute SCI. METHODS: We performed a retrospective chart review of consecutive adult patients with acute SCI. The primary outcome was incidence of symptomatic deep vein thrombosis (DVT) or pulmonary embolism (PE) within 90days. Secondary outcomes were major bleeding, all-cause mortality, and fatal PE...
October 3, 2016: Thrombosis Research
Kylie Mueller, Nijole Bernaitis, Tony Badrick, Shailendra Anoopkumar-Dukie
The HAS-BLED model is widely utilised to assess patients' bleed risk prior to anticoagulant therapy including warfarin. Some of the variables assessed in the model are also known to influence warfarin control, commonly measured by time in therapeutic range (TTR). The aim of the study was to determine if the HAS-BLED risk tool is a good predictor of bleed risk and warfarin control in deep vein thrombosis (DVT) patients. Retrospective data were collected for DVT warfarin care patients at Sullivan Nicolaides Pathology...
October 8, 2016: Basic & Clinical Pharmacology & Toxicology
Nickolas Kipshidze, Anaka Prakash, Nodar Kipshidze, David Chakhunashvili, Zurab Kakabadze
BACKGROUND: Surgical treatment of obesity is characterized by both early and late complications, and thus, there is a need to develop safe and non-invasive techniques. Ghrelin is an orexigenic hormone produced by the fundus of the stomach, which may represent a novel target for obesity management. Unfortunately, numerous attempts to alter ghrelin levels have failed to present significant clinical results. We describe a novel procedure that involves modifying arterial blood flow to the gastric fundus for limiting plasma ghrelin levels...
October 8, 2016: Obesity Surgery
Takeo Ishii, Yasunobu Suzuki, Takuji Nakayama, Miki Ohmori, Shinichi Masai, Naru Sasagawa, Kunio Ohyama
OBJECTIVE: To determine if duplex ultrasound (US) for arteriovenous fistulas (AVFs) can predict vascular events (VEs; thrombosis and stenosis). METHODS: Duplex US was performed for vascular access evaluation in 2557 maintenance hemodialysis (HD) patients between October 1, 2013 and March 31, 2016. Of these patients, 2184 patients were finally included in this study. AVF dysfunction was assessed using the brachial artery blood flow volume (Qa; mL/min), arterial blood flow resistance index (RI), and residual diameter of the fistula vein (RD; mm)...
September 27, 2016: Journal of Vascular Access
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