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https://www.readbyqxmd.com/read/28335516/marine-diterpenes-molecular-modeling-of-thrombin-inhibitors-with-potential-biotechnological-application-as-an-antithrombotic
#1
Rebeca Cristina Costa Pereira, André Luiz Lourenço, Luciana Terra, Paula Alvarez Abreu, Valéria Laneuville Teixeira, Helena Carla Castro
Thrombosis related diseases are among the main causes of death and incapacity in the world. Despite the existence of antithrombotic agents available for therapy, they still present adverse effects like hemorrhagic risks which justify the search for new options. Recently, pachydictyol A, isopachydictyol A, and dichotomanol, three diterpenes isolated from Brazilian marine brown alga Dictyota menstrualis were identified as potent antithrombotic molecules through inhibition of thrombin, a key enzyme of coagulation cascade and a platelet agonist...
March 20, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28334263/pathogenesis-of-meningococcal-purpura-fulminans
#2
H Lécuyer, D Borgel, X Nassif, M Coureuil
Purpura fulminans (PF) is a dreadful and frequent complication of Neisseria meningitidis invasive infection, and is associated with a high mortality rate. This syndrome begins with dermal microvessels thrombosis that rapidly lead to hemorrhagic skin necrosis. In this review, we discuss the prothrombotic events occurring during meningococcal infection. Moreover, recent data from an experimental mouse model have highlighted the critical role of the meningococcus adhesion to the endothelium in the development of PF lesions, thus opening new therapeutic perspectives...
March 9, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/28332985/prostate-cancer-radiation-therapy-and-risk-of-thromboembolic-events
#3
Cecilia Bosco, Hans Garmo, Jan Adolfsson, Pär Stattin, Lars Holmberg, Per Nilsson, Adalsteinn Gunnlaugsson, Anders Widmark, Mieke Van Hemelrijck
PURPOSE: To investigate the risk of thromboembolic disease (TED) after radiation therapy (RT) with curative intent for prostate cancer (PCa). PATIENTS AND METHODS: We identified all men who received RT as curative treatment (n=9410) and grouped according to external beam RT (EBRT) or brachytherapy (BT). By comparing with an age- and county-matched comparison cohort of PCa-free men (n=46,826), we investigated risk of TED after RT using Cox proportional hazard regression models...
April 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28331857/thrombosis-neuroinflammation-and-poststroke-infection-the-multifaceted-role-of-neutrophils-in-stroke
#4
REVIEW
Johanna Ruhnau, Juliane Schulze, Alexander Dressel, Antje Vogelgesang
Immune cells can significantly predict and affect the clinical outcome of stroke. In particular, the neutrophil-to-lymphocyte ratio was shown to predict hemorrhagic transformation and the clinical outcome of stroke; however, the immunological mechanisms underlying these effects are poorly understood. Neutrophils are the first cells to invade injured tissue following focal brain ischemia. In these conditions, their proinflammatory properties enhance tissue damage and may promote ischemic incidences by inducing thrombus formation...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28326557/analysis-of-blood-flow-characteristics-in-a-model-of-a-mature-side-to-side-arteriovenous-fistula
#5
Ashkan Javadzadegan, Nay Myo Lwin, Muhammad Asyraf, Anne Simmons, Tracie Barber
The creation of an arteriovenous fistula (AVF) is a common surgical procedure in hemodialysis patients suffering from end-stage renal disease (ESRD). However, several complications may occur after surgery, including thrombosis, stenosis, and aneurysm. These complications are attributed to hemodynamics perturbations including pathophysiological wall shear stress (WSS) and flow recirculation zones. In this study, we present a computational hemodynamic analysis in a model of a mature side-to-side AVF, which is then validated by experimental measurements...
March 21, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28320710/myeloid-p53-regulates-macrophage-polarization-and-venous-thrombus-resolution-by-inflammatory-vascular-remodeling-in-mice
#6
Subhradip Mukhopadhyay, Toni M Antalis, Khanh P Nguyen, Mark H Hoofnagle, Rajabrata Sarkar
Deep venous thrombosis (DVT) remains a common and serious cardiovascular problem with both fatal and long-term consequences. The consequences of DVT include the development of post-thrombotic syndrome (PTS) in 25-60% of DVT patients. Despite the clinical importance of venous thrombus resolution, the cellular and molecular mediators involved are poorly understood, and currently there is no molecular therapy to accelerate this process. Several lines of evidence suggest that a complex and interrelated array of molecular signaling processes are involved in the inflammatory vascular remodeling associated with the resolution of DVT...
March 20, 2017: Blood
https://www.readbyqxmd.com/read/28319522/a-numerical-simulation-comparing-a-cavopulmonary-assist-device-and-va-ecmo-for-failing-fontan-support
#7
Po-Lin Hsu, Dongfang Wang, Cherry Ballard-Croft, Dawei Xiao, Joseph B Zwischenberger
A cavopulmonary assist device (CPAD) has been developed for failing Fontan support. This CPAD pumps blood from superior/inferior vena cavae to pulmonary artery. In this study, we compared failing Fontan support with CPAD versus VA ECMO in silico. A numerical lumped-parameter circulatory system model was used to simulate Fontan circulation. Failing Fontan was simulated by increased pulmonary resistance. Central venous pressure (CVP), mean pulmonary arterial pressure (mPAP), left atrial pressure (LAP), and univentricular outflow (CO) were simulated and compared to published clinical data...
March 17, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28317023/reduction-of-thrombosis-and-bacterial-infection-via-controlled-nitric-oxide-no-release-from-s-nitroso-n-acetylpenicillamine-snap-impregnated-carbosil-intravascular-catheters
#8
Yaqi Wo, Elizabeth J Brisbois, Jianfeng Wu, Zi Li, Terry C Major, Azmath Mohammed, Xianglong Wang, Alessandro Colletta, Joseph L Bull, Adam J Matzger, Chuanwu Xi, Robert H Bartlett, Mark E Meyerhoff
Nitric oxide (NO) has many important physiological functions, including its ability to inhibit platelet activation and serve as potent antimicrobial agent. The multiple roles of NO in vivo have led to great interest in the development of biomaterials that can deliver NO for specific biomedical applications. Herein, we report a simple solvent impregnation technique to incorporate a nontoxic NO donor, S-nitroso-N-acetylpenicillamine (SNAP), into a more biocompatible biomedical grade polymer, CarboSil 20 80A. The resulting polymer-crystal composite material yields a very stable, long-term NO release biomaterial...
March 13, 2017: ACS Biomaterials Science & Engineering
https://www.readbyqxmd.com/read/28316856/giant-splenorenal-shunt-in-a-young-patient-with-autoimmune-hepatitis-primary-biliary-cholangitis-overlap-syndrome-and-portal-vein-thrombosis
#9
F Chegai, A U Cavallo, M Forcina, V Giuricin, F Castellani, L Greco, M Manuelli, T M Manzia, G Sergiacomi
We present a case of giant Splenorenal Shunt (SRS) associated with portal vein thrombosis in a 37-year-old woman with a twelve-year history of autoimmune hepatitis/primary biliary cholangitis overlap syndrome. At the moment of the CT examination laboratory tests showed creatinine 1.5 mg/dl, bilirubin 1.5 mg/dl, INR 3, and Na 145 mmol/l and the Model End-Stage Liver Disease score was 24. Extensive calcified thrombosis causing complete occlusion of the portal vein lumen and partially occluding the origin of the superior mesenteric vein was present and a small calcified thrombus in the Splenic Vein lumen was also evident...
2017: Case Reports in Radiology
https://www.readbyqxmd.com/read/28316156/-risk-factors-of-pulmonary-embolism-in-senile-and-non-senile-inpatients-and-the-predictive-value-of-caprini-risk-assessment-model-in-these-two-populations
#10
Y Chen, H X Zhou, Y H Hu, T X Cong, Y J Tang, L Wang, M Y Wang, Q Yi, Z A Liang
Objective: To investigate the risk factors of pulmonary embolism (PE) in senile and non-senile inpatients, and evaluate the predictive value of Caprini risk assessment model in these two populations. Methods: Case control study design was used in this study. All the PE patients diagnosed in West China Hospital of Sichuan University between January 2012 and December 2014 was included and divided into senile PE group (age ≥65 years old) and non-senile PE group (age <65 years old). Age matched controls (senile control group and non-senile control group) were selected from the patients admitted into the same departments during the same time period as PE patients, at a ratio of 2∶1...
March 14, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28314731/long-term-outcomes-of-provisional-stenting-compared-with-a-two-stent-strategy-for-bifurcation-lesions-a-meta-analysis-of-randomised-trials
#11
Ramez Nairooz, Marwan Saad, Islam Y Elgendy, Ahmed N Mahmoud, Fuad Habash, Partha Sardar, David Anderson, David M Shavelle, J Dawn Abbott
BACKGROUND: The optimal interventional technique for addressing coronary bifurcation lesions is debatable. Long-term clinical outcomes with provisional stenting (PS) compared with a two-stent (TS) strategy for bifurcation lesions are scarce. We aim to perform the first meta-analysis of randomised controlled trials (RCTs) to explore long-term outcomes comparing both strategies. METHODS: An electronic search was performed for online databases until August 2016 for RCTs comparing PS with TS for bifurcation lesions reporting outcomes at 1 year of follow-up or more...
March 17, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28314136/platelet-microparticle-inspired-clot-responsive-nanomedicine-for-targeted-fibrinolysis
#12
Christa L Pawlowski, Wei Li, Michael Sun, Kavya Ravichandran, DaShawn Hickman, Clarissa Kos, Gurbani Kaur, Anirban Sen Gupta
Intravascular administration of plasminogen activators is a clinically important thrombolytic strategy to treat occlusive vascular conditions. A major issue with this strategy is the systemic off-target drug action, which affects hemostatic capabilities and causes substantial hemorrhagic risks. This issue can be potentially resolved by designing technologies that allow thrombus-targeted delivery and site-specific action of thrombolytic drugs. To this end, leveraging a liposomal platform, we have developed platelet microparticle (PMP)-inspired nanovesicles (PMINs), that can protect encapsulated thrombolytic drugs in circulation to prevent off-target uptake and action, anchor actively onto thrombus via PMP-relevant molecular mechanisms and allow drug release via thrombus-relevant enzymatic trigger...
March 14, 2017: Biomaterials
https://www.readbyqxmd.com/read/28306737/alcohol-consumption-and-the-risk-of-postoperative-mortality-and-morbidity-after-primary-hip-or-knee-arthroplasty-a-register-based-cohort-study
#13
Torill A Rotevatn, Henrik Bøggild, Christinna R Olesen, Christian Torp-Pedersen, Rikke N Mortensen, Per F Jensen, Charlotte Overgaard
OBJECTIVE: To investigate the implications of low and moderate preoperative alcohol consumption on postoperative mortality and morbidity after primary hip and knee arthroplasty. METHODS: A total of 30,799 patients who underwent primary hip or knee arthroplasty between January 1st, 2005 and October 8th, 2011 with information on preoperative alcohol consumption (0 grams of pure alcohol/week, >0-168 g/week, >168-252 g/week, and >252 g/week) were identified through the Danish Anesthesia Database...
2017: PloS One
https://www.readbyqxmd.com/read/28306627/novel-microspheres-reduce-the-formation-of-deep-venous-thrombosis-and-repair-the-vascular-wall-in-a-rat-model
#14
Bingyang Dai, Lan Li, Qiangqiang Li, Xiaoxiao Song, Dongyang Chen, Jin Dai, Yao Yao, Wenjin Yan, Huajian Teng, Fang Yang, Zhihong Xu, Qing Jiang
L-Arginine (L-arg), widely known as a substrate for endogenous nitric oxide synthesis, can improve endothelial function associated with the vasculature, inhibit platelet aggregation, and alter the activity of vascular smooth muscle cells. P-selectin is a membrane component of the platelet alpha-granule and the endothelial cell-specific Wiebel-Palade body that plays a central role in mediating interactions between platelets and both leukocytes and the endothelium. The experiment was designed to evaluate the effect of novel microspheres with L-arg targeting P-selectin on the formation of deep vein thrombosis and repair of vascular wall in a rat model...
March 16, 2017: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/28303970/transient-desialylation-in-combination-with-a-novel-antithrombin-deficiency-causing-a-severe-and-recurrent-thrombosis-despite-anticoagulation-therapy
#15
Nuria Revilla, María Eugenia de la Morena-Barrio, Antonia Miñano, Raquel López-Gálvez, Mara Toderici, José Padilla, Ángel García-Avello, María Luisa Lozano, Dirk J Lefeber, Javier Corral, Vicente Vicente
An in-depth focused study of specific cases of patients with recurrent thrombosis may help to identify novel circumstances, genetic and acquired factors contributing to the development of this disorder. The aim of this study was to carry out a detailed and sequential analysis of samples from a patient suffering from early and recurrent venous and arterial thrombosis. We performed thrombophilic tests, biochemical, functional, genetic and glycomic analysis of antithrombin and other plasma proteins. The patient carried a new type I antithrombin mutation (p...
March 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28302670/modelling-pulmonary-microthrombosis-coupled-to-metastasis-distinct-effects-of-thrombogenesis-on-tumorigenesis
#16
Colin E Evans, Asis Palazon, Jingwei Sim, Petros A Tyrakis, Alice Prodger, Xiao Lu, Saria Chan, Pär-Ola Bendahl, Mattias Belting, Love Von Euler, Helene Rundqvist, Randall S Johnson, Cristina Branco
Thrombosis can cause localized ischemia and tissue hypoxia, and both of these are linked to cancer metastasis. Vascular micro-occlusion can occur as a result of arrest of circulating tumor cells in small capillaries, giving rise to microthrombotic events that affect flow, creating localized hypoxic regions. To better understand the association between metastasis and thrombotic events, we generated an experimental strategy whereby we model the effect of microvascular occlusion in metastatic efficiency, by using inert microbeads to obstruct lung microvasculature before, during and after intravenous tumor cell injection...
March 16, 2017: Biology Open
https://www.readbyqxmd.com/read/28301994/does-preoperative-transarterial-chemoembolization-for-hepatocellular-carcinoma-increase-the-incidence-of-hepatic-artery-thrombosis-after-living-donor-liver-transplant
#17
Volkan Ince, Veysel Ersan, Serdar Karakas, Koray Kutluturk, Nese Karadag, Ramazan Kutlu, Sezai Yilmaz
OBJECTIVES: Transarterial chemoembolization is a potential risk factor for hepatic artery damage, which may lead to severe consequences. We aimed to investigate this controversial issue in our population of liver transplant patients with hepatocellular carcinoma. MATERIALS AND METHODS: Between March 2006 and December 2016, a total of 262 patients with hepatocellular carcinoma underwent liver transplant at our institution. Of these, 22 (8.4%) had preoperative transarterial chemoembolization...
March 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/28300869/e-selectin-inhibition-with-gmi-1271-decreases-venous-thrombosis-without-profoundly-affecting-tail-vein-bleeding-in-a-mouse-model
#18
Dorian L Culmer, Misha L Dunbar, Angela E Hawley, Suman Sood, Robert E Sigler, Peter K Henke, Thomas W Wakefield, John L Magnani, Daniel D Myers
Selectins, such as E-selectin (CD62E), function in venous thrombosis by binding and activating immune cells to initiate the coagulation cascade. GMI-1271 is a small molecule antagonist that inhibits E-selectin activity. Here we determine whether inhibition of E-selectin is sufficient to decrease acute venous thrombosis and associated inflammatory events in both prophylactic and treatment protocols without significantly affecting haemostasis. Male C57BL/6 mice underwent surgery for experimental thrombosis induction and were harvested at peak thrombus formation in our animal model, two days post induction...
March 16, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28296591/hypolipidemic-and-antioxidant-effects-of-malus-toringoides-rehd-hughes-leaves-in-high-fat-diet-induced-hyperlipidemic-rats
#19
Shan Huang, Haifeng Liu, Ning Meng, Bin Li, Jule Wang
Malus toringoides (Rehd.) Hughes (MT) leaves are traditionally used as a medicine for treating or preventing cardiovascular disease in Tibet. In addition to the effect of this medicinal plant on thrombosis, we tested its effect on dyslipidemia in a hypolipidemic rat model. A total of 60 healthy Sprague-Dawley rats were randomly divided into six groups, as follows: normal control, model control, simvastatin groups, and MT low-, medium-, and high-dose groups. The normal controls were fed with a normal diet, whereas all other groups were fed with a high-fat diet...
March 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28296170/percutaneous-coronary-intervention-or-coronary-artery-bypass-grafting-for-unprotected-left-main-coronary-artery-disease
#20
Ahmed N Mahmoud, Islam Y Elgendy, Amgad Mentias, Marwan Saad, Walid Ibrahim, Mohammad K Mojadidi, Ramez Nairooz, Parham Eshtehardi, R David Anderson, Habib Samady
BACKGROUND: Recent trials comparing PCI with CABG for unprotected left main disease yielded discrepant evidence. OBJECTIVES: To perform an updated meta-analysis of randomized trials comparing percutaneous coronary intervention (PCI) with coronary artery bypass grafting (CABG) in patients with unprotected left main coronary artery disease. METHODS: Randomized trials comparing PCI versus CABG for patients with unprotected left main coronary artery disease were included...
March 15, 2017: Catheterization and Cardiovascular Interventions
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