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https://www.readbyqxmd.com/read/28228483/new-concepts-and-mechanisms-of-platelet-activation-signaling
#1
REVIEW
Brian Estevez, Xiaoping Du
Upon blood vessel injury, platelets are exposed to adhesive proteins in the vascular wall and soluble agonists, which initiate platelet activation, leading to formation of hemostatic thrombi. Pathological activation of platelets can induce occlusive thrombosis, resulting in ischemic events such as heart attack and stroke, which are leading causes of death globally. Platelet activation requires intracellular signal transduction initiated by platelet receptors for adhesion proteins and soluble agonists. Whereas many platelet activation signaling pathways have been established for many years, significant recent progress reveals much more complex and sophisticated signaling and amplification networks...
March 2017: Physiology
https://www.readbyqxmd.com/read/28228303/impact-of-very-high-pressure-stent-deployment-on-angiographic-and-long-term-clinical-outcomes-in-true-coronary-bifurcation-lesions-treated-by-the-mini-crush-stent-technique-a-single-center-experience
#2
Antoine Gerbay, Jeremy Terreaux, Alexis Cerisier, Marco Vola, Karl Isaaz
BACKGROUND: Percutaneous coronary intervention (PCI) for bifurcation lesions (BL) using 2 stents technique is known to be associated with high rates of procedural failure especially on the side branch (SB) mainly due to stent incomplete apposition. Stent deployment at very high pressure (SDHP) may lead to better stent expansion and apposition. However, SDHP may also be at the origin of deeper wall injury resulting into major cardiac adverse events. No data are available on evaluation of SDHP in BL treated by a mini-crush stent technique...
January 2017: Indian Heart Journal
https://www.readbyqxmd.com/read/28228068/stress-in-gastrointestinal-tract-and-stable-gastric-pentadecapeptide-bpc-157-finally-do-we-have-a-solution
#3
Predrag Sikiric, Sven Seiwerth, Rudolf Rucman, Domagoj Drmic, Mirjana Stupnisek, Antonio Kokot, Marko Sever, Ivan Zoricic, Zoran Zoricic, Lovorka Batelja, Tihomil Ziger, Josipa Vlainic, Zarko Rasic, Martina Lovric Bencic
Selye's syndrome produced by diverse nocuous agents and "response to damage as such" means Selye's stress triad in stress coping response to reestablish homeostasis. Logically, from the gastrointestinal tract viewpoint, such organoprotective/healing response implies the angiogenic growth factors that commonly signify the healing. Thereby, the gastric pentadecapeptide BPC 157-organoprotection (huge range of beneficial effects) signifies the Selye's stress concept/stress coping response implemented in and from gastrointestinal tract, and BPC 157 as an integrative mediator that integrates the adaptive bodily response to stress...
February 20, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28223279/distinct-contributions-of-complement-factors-to-platelet-activation-and-fibrin-formation-in-venous-thrombus-development
#4
Saravanan Subramaniam, Kerstin Jurk, Lukas Hobohm, Sven Jäckel, Mona Saffarzadeh, Kathrin Schwierczek, Philip Wenzel, Florian Langer, Christoph Reinhardt, Wolfram Ruf
Expanding evidence indicates multiple interactions between the hemostatic system and innate immunity and the coagulation and complement cascades. Here we show in a tissue factor (TF)-dependent model of flow restriction-induced venous thrombosis that complement factors (C) make distinct contributions to platelet activation and fibrin deposition. C3-deficiency causes prolonged bleeding, reduced thrombus incidence, thrombus size, fibrin and platelet deposition in the ligated inferior vena cava, and diminished platelet activation in vitro...
February 21, 2017: Blood
https://www.readbyqxmd.com/read/28218279/multi-constituent-simulation-of-thrombus-deposition
#5
Wei-Tao Wu, Megan A Jamiolkowski, William R Wagner, Nadine Aubry, Mehrdad Massoudi, James F Antaki
In this paper, we present a spatio-temporal mathematical model for simulating the formation and growth of a thrombus. Blood is treated as a multi-constituent mixture comprised of a linear fluid phase and a thrombus (solid) phase. The transport and reactions of 10 chemical and biological species are incorporated using a system of coupled convection-reaction-diffusion (CRD) equations to represent three processes in thrombus formation: initiation, propagation and stabilization. Computational fluid dynamic (CFD) simulations using the libraries of OpenFOAM were performed for two illustrative benchmark problems: in vivo thrombus growth in an injured blood vessel and in vitro thrombus deposition in micro-channels (1...
February 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28216214/everolimus-versus-novolimus-eluting-bioresorbable-scaffolds-for-the-treatment%C3%A2-of-coronary-artery-disease-a-matched-comparison
#6
Jens Wiebe, Oliver Dörr, Hanna Ilstad, Oliver Husser, Christoph Liebetrau, Niklas Boeder, Timm Bauer, Helge Möllmann, Adnan Kastrati, Christian W Hamm, Holger M Nef
OBJECTIVES: The purpose of this study was to compare the 1-year outcome of everolimus-eluting bioresorbable scaffolds (eBRS) and Novolimus-eluting bioresorbable scaffolds (nBRS) in patients undergoing percutaneous coronary intervention in a real-life clinical practice scenario. BACKGROUND: eBRS and nBRS are available and have been proved safe for coronary artery stenting in well-selected patients. METHODS: Consecutive patients who underwent bioresorbable scaffold implantation were evaluated retrospectively via 2:1 propensity matching...
February 9, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28210239/flow-diversion-for-the-treatment-of-mca-bifurcation-aneurysms-a-single-centre-experience
#7
Pervinder Bhogal, Muhammad AlMatter, Hansjörg Bäzner, Oliver Ganslandt, Hans Henkes, Marta Aguilar Pérez
BACKGROUND: Intracranial aneurysms located at the bifurcation of the middle cerebral artery (MCA) can often be challenging for the neurointerventionalist. We aimed to evaluate the efficacy and safety of flow diverting stents (FDS) in the treatment of these aneurysms. MATERIALS AND METHODS: We retrospectively reviewed our prospectively maintained database to collect information for all patients with unruptured saccular bifurcation MCA aneurysms treated with FDS between January 2010 and January 2016...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28208634/rna-eluting-surfaces-for-the-modulation-of-gene-expression-as-a-novel-stent-concept
#8
Olivia Koenig, Diane Zengerle, Nadja Perle, Susanne Hossfeld, Bernd Neumann, Andreas Behring, Meltem Avci-Adali, Tobias Walker, Christian Schlensak, Hans Peter Wendel, Andrea Nolte
Presently, a new era of drug-eluting stents is continuing to improve late adverse effects such as thrombosis after coronary stent implantation in atherosclerotic vessels. The application of gene expression-modulating stents releasing specific small interfering RNAs (siRNAs) or messenger RNAs (mRNAs) to the vascular wall might have the potential to improve the regeneration of the vessel wall and to inhibit adverse effects as a new promising therapeutic strategy. Different poly (lactic-co-glycolic acid) (PLGA) resomers for their ability as an siRNA delivery carrier against intercellular adhesion molecule (ICAM)-1 with a depot effect were tested...
February 10, 2017: Pharmaceuticals
https://www.readbyqxmd.com/read/28191875/clinical-outcomes-with-the-stentys-self-apposing-coronary-stent-in-patients-presenting-with-st-segment-elevation-myocardial-infarction-2-year-insights-from-the-appostion-iii-a-post-market-registry-to-assess-the-stentys-self-expanding-coronary-stent-in-acute
#9
Huangling Lu, Maik J Grundeken, Nicola S Vos, Alexander J J Ijsselmuiden, Robert-Jan van Geuns, Rainer Wessely, Thomas Dengler, Alessio La Manna, Johanne Silvain, Gilles Montalescot, René Spaargaren, Jan G P Tijssen, Giovanni Amoroso, Robbert J de Winter, Karel T Koch
AIMS: The APPOSITION III registry evaluated the feasibility and performance of the STENTYS self- apposing stent in a ST-segment elevation myocardial infarction (STEMI) population. This novel self- apposing stent device lowers stent strut malapposition rates and therefore bears the potential to prevent stent undersizing during primary percutaneous coronary intervention (PCI) in STEMI patients. Up to date, no long-term data is available using this device in the setting of STEMI. We aimed to evaluate long-term clinical outcomes of the APPOSITION III registry...
February 14, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28185704/everolimus-versus-zotarolimus-eluting-stent-following-percutaneous-coronary-chronic-total-occlusion-intervention
#10
Pil Hyung Lee, Min Soo Cho, Seung-Whan Lee, Jung-Min Ahn, Duk-Woo Park, Soo-Jin Kang, Young-Hak Kim, Cheol Whan Lee, Seong-Wook Park, Seung-Jung Park
BACKGROUND: Although studies have demonstrated comparable efficacy and safety profiles of everolimus- and zotarolimus-eluting stents (EES and ZES, respectively) for a broad spectrum of coronary artery diseases, there is paucity of data concerning their safety and efficacy for coronary chronic total occlusions (CTOs). This study compared the clinical performance of EES and ZES following successful percutaneous coronary intervention for CTOs. METHODS: The cohort included 539 consecutive CTO patients who underwent successful PCI using EES (n=313) and ZES (n=226) between September 2006 and August 2014...
February 2, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28183505/10-year-clinical-outcome-after-randomization-to-treatment-by-sirolimus-%C3%A2-or-paclitaxel-eluting-coronary%C3%A2-stents
#11
Anders M Galløe, Henning Kelbæk, Leif Thuesen, Henrik S Hansen, Jan Ravkilde, Peter R Hansen, Evald H Christiansen, Ulrik Abildgaard, Ghita Stephansen, Jens F Lassen, Thomas Engstrøm, Jan Skov Jensen, Jørgen L Jeppesen, Niels Bligaard
BACKGROUND: First-generation drug-eluting coronary stents (DES) were introduced in 2003 to 2004, and their use resulted in a considerable reduction in the development of in-stent restenosis at the cost of an increased risk of late stent thromboses. OBJECTIVES: This study followed clinical outcomes of patients included in a large randomized trial for 10 years to enable detection of late changes in annual event rates that could necessitate medical attention. METHODS: A total of 2,098 unselected all-comer patients (50% with acute coronary syndrome) were randomly assigned to have a first-generation DES implanted...
February 14, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28182306/effect-of-a-hypoxic-microenvironment-after-radiofrequency-ablation-on-residual-hepatocellular-cell-migration-and-invasion
#12
Yuyang Tong, Haiyun Yang, Xiaolin Xu, Jingliang Ruan, Ming Liang, Jiayi Wu, Baoming Luo
Clinical observations have shown that the boundary of tumor ablation is often less than safe border and that the use of radiofrequency ablation (RFA) in the treatment of hepatocellular carcinoma (HCC) may probably accelerate its recurrence and metastasis. RFA can cause the formation of a transition zone between normal liver tissues and necrotic coagulation, where blood stagnation and thrombosis expose residual cancer cells to a hypoxic microenvironment. As the blocked vessels are slowly reperfused, the oxygen supply is gradually restored...
February 9, 2017: Cancer Science
https://www.readbyqxmd.com/read/28179559/acute-cerebral-venous-thrombosis-three-dimensional-visualization-and-quantification-of-hemodynamic-alterations-using-4-dimensional-flow-magnetic-resonance-imaging
#13
Florian Schuchardt, Anja Hennemuth, Laure Schroeder, Stephan Meckel, Michael Markl, Thomas Wehrum, Andreas Harloff
BACKGROUND AND PURPOSE: Cerebral venous thrombosis (CVT) affects venous hemodynamics and can provoke severe stroke and chronic intracranial hypertension. We sought to comprehensively analyze 3-dimensional blood flow and hemodynamic alterations during acute CVT including collateral recruitment and at follow-up. METHODS: Twenty-two consecutive patients with acute CVT were prospectively included and underwent routine brain magnetic resonance imaging (MRI) and 4-dimensional flow MRI at 3 T for the in vivo assessment of cerebral blood flow...
February 8, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28166137/vascular-complications-and-free-flap-salvage-in-head-and-neck-reconstructive-surgery-analysis-of-150-cases-of-reexploration
#14
Yen-Hao Chiu, Dun-Hao Chang, Cherng-Kang Perng
INTRODUCTION: Despite the excellent reliability of free tissue transfer, flap failure is devastating, and in addition to patient morbidity, it may increase hospital stay and associated costs. Previous studies have evaluated factors related to flap salvage, regarding the operative strategy for flap salvage surgery. The present study aimed to share our experience of reexploration and describe operative standards dealing with vascular thrombosis. METHODS: We retrospectively reviewed 150 (of 1258) free flaps for head and neck reconstruction that showed signs of vascular compromise at our institution during a 13-year period between 2002 and 2015...
February 4, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28162989/orbital-atherectomy-for-treating-de-novo-severely-calcified-coronary-lesions-3-year-results-of-the-pivotal-orbit-ii-trial
#15
Michael Lee, Philippe Généreux, Richard Shlofmitz, Daniel Phillipson, Bynthia M Anose, Brad J Martinsen, Stevan I Himmelstein, Jeff W Chambers
BACKGROUND/PURPOSE: The presence of heavy coronary artery calcification increases the complexity of percutaneous coronary intervention (PCI) and increases the incidence of major adverse cardiac events (MACE): death, myocardial infarction (MI), target vessel revascularization (TVR), and stent thrombosis. The ORBIT II (Evaluate the Safety and Efficacy of OAS in Treating Severely Calcified Coronary Lesions) trial reported low rates of procedural, 30-day, 1-year, and 2-year ischemic complications after treatment of de novo, severely calcified lesions with the Diamondback 360° Coronary Orbital Atherectomy System (OAS) (Cardiovascular Systems, Inc...
January 23, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/28162229/the-increased-transforming-growth-factor-%C3%AE-signaling-induced-by-diabetes-protects-retinal-vessels
#16
Zeina Dagher, Chiara Gerhardinger, Joseph Vaz, Michael Goodridge, Francesco Tecilazich, Mara Lorenzi
The roles of transforming growth factor (TGF)-β in extracellular matrix production and vascular remodeling, coupled with increased TGF-β expression and signaling in diabetes, suggest TGF-β as an important contributor to the microangiopathy of diabetic retinopathy and nephropathy. To investigate whether increased TGF-β signaling could be a therapeutic target for preventing retinopathy, we used a pharmacologic approach (SM16, a selective inhibitor of the type 1 TGF-β receptor activin receptor-like kinase 5, orally active) to inhibit the increased, but not the basal, Tgf-β signaling in retinal vessels of diabetic rats...
February 1, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28150849/from-thrombosis-to-fibrosis-in-chronic-thromboembolic-pulmonary-hypertension
#17
Magdalena L Bochenek, Nico S Rosinus, Mareike Lankeit, Lukas Hobohm, Felix Bremmer, Eva Schütz, Frederikus A Klok, Sven Horke, Christoph B Wiedenroth, Thomas Münzel, Irene M Lang, Eckhard Mayer, Stavros Konstantinides, Katrin Schäfer
The pathomechanisms underlying the development of thrombofibrotic pulmonary artery occlusions in Chronic Thromboembolic Pulmonary Hypertension (CTEPH) are largely unknown. The aim of this study was to allocate distinct cellular processes playing a role in thrombus resolution, such as inflammation, hypoxia, proliferation, apoptosis and angiogenesis, to different stages of thrombofibrotic remodelling. A total of 182 pulmonary endarterectomy (PEA) specimens were collected from 31 CTEPH patients. To facilitate co-localisation, Tissue MicroArrays were prepared and processed for (immuno)-histochemistry and confocal fluorescence microscopy...
February 2, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28150291/presence-of-multiple-coronary-angiographic-characteristics-for-the-diagnosis-of-acute-coronary-thrombus
#18
Alok R Amraotkar, Shahab Ghafghazi, Patrick J Trainor, Charles W Hargis, Affan B Irfan, Shesh N Rai, Aruni Bhatnagar, Andrew P DeFilippis
BACKGROUND: Coronary angiography is frequently employed to aid in the diagnosis of acute coronary thrombosis, but there is limited data to support its efficacy. The aim of the study was to evaluate sensitivity and specificity of five commonly used angiographic characteristics for diagnosis of acute coronary thrombosis: Ambrose complex lesion morphology; spherical, ovoid, or irregular filling defect; abrupt vessel cutoff; intraluminal staining; and any coronary filling defect. METHODS: Coronary angiography of 80 acute myocardial infarction or stable coronary artery disease subjects were assessed in blinded fashion, for the presence or absence of five angiographic characteristics...
February 2, 2017: Cardiology Journal
https://www.readbyqxmd.com/read/28148963/photodynamic-therapy-monitoring-with-optical-coherence-angiography
#19
M A Sirotkina, L A Matveev, M V Shirmanova, V Y Zaitsev, N L Buyanova, V V Elagin, G V Gelikonov, S S Kuznetsov, E B Kiseleva, A A Moiseev, S V Gamayunov, E V Zagaynova, F I Feldchtein, A Vitkin, N D Gladkova
Photodynamic therapy (PDT) is a promising modern approach for cancer therapy with low normal tissue toxicity. This study was focused on a vascular-targeting Chlorine E6 mediated PDT. A new angiographic imaging approach known as M-mode-like optical coherence angiography (MML-OCA) was able to sensitively detect PDT-induced microvascular alterations in the mouse ear tumour model CT26. Histological analysis showed that the main mechanisms of vascular PDT was thrombosis of blood vessels and hemorrhage, which agrees with angiographic imaging by MML-OCA...
February 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28148841/platelet-localized-fxi-promotes-a-vascular-coagulation-inflammatory-circuit-in-arterial-hypertension
#20
Sabine Kossmann, Jeremy Lagrange, Sven Jäckel, Kerstin Jurk, Moritz Ehlken, Tanja Schönfelder, Yvonne Weihert, Maike Knorr, Moritz Brandt, Ning Xia, Huige Li, Andreas Daiber, Matthias Oelze, Christoph Reinhardt, Karl Lackner, Andras Gruber, Brett Monia, Susanne H Karbach, Ulrich Walter, Zaverio M Ruggeri, Thomas Renné, Wolfram Ruf, Thomas Münzel, Philip Wenzel
Multicellular interactions of platelets, leukocytes, and the blood vessel wall support coagulation and precipitate arterial and venous thrombosis. High levels of angiotensin II cause arterial hypertension by a complex vascular inflammatory pathway that requires leukocyte recruitment and reactive oxygen species production and is followed by vascular dysfunction. We delineate a previously undescribed, proinflammatory coagulation-vascular circuit that is a major regulator of vascular tone, blood pressure, and endothelial function...
February 1, 2017: Science Translational Medicine
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