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https://www.readbyqxmd.com/read/27936141/hbs-binding-to-gp1b%C3%AE-activates-platelets-in-sickle-cell-disease
#1
Gowtham K Annarapu, Rashi Singhal, Avinash Gupta, Sheetal Chawla, Harish Batra, Tulika Seth, Prasenjit Guchhait
Intravascular hemolysis increases the risk of thrombosis in hemolytic disorders. Our previous study showed that the binding of adult hemoglobin (HbA) to glycoprotein (GP) 1bα induced the activation of platelets. The elevated plasma Hb or platelet surface bound Hb positively correlated with platelet activation in patients with paroxysmal nocturnal hemoglobinuria (PNH). Furthermore, this study shows that the sickle Hb [HbS, occurs due to single nucleotide polymorphism at A>T of β-globin gene of Hb and causes sickle cell disease (SCD)] also bound to GP1bα and activated platelets in a concentration-dependent manner...
2016: PloS One
https://www.readbyqxmd.com/read/27935930/acute-ischemic-stroke-and-acute-on-chronic-kidney-disease
#2
R A Aftab, A H Khan, H A AbdulRazzaq, A S Adnan
Ischemic stroke is due to either local thrombus formation or emboli that occlude a cerebral artery, together with chronic kidney disease represent major mortality and morbidity.Here we present a case of 53 years old Malay man, admitted to a hospital in Malaysia complaining of sudden on set of weakness on right sided upper and lower limb associated with slurred speech. Patient was also suffering from uncontrolled hypertension, hyperlipidemia, chronic kidney disease stage 4, and diabetes mellitus (uncontrolled)...
April 2016: JNMA; Journal of the Nepal Medical Association
https://www.readbyqxmd.com/read/27935897/-thrombosis-of-the-portal-upper-mesenteric-and-splenic-veins-in-a-patient-with-thrombophilia-a-clinical-case-report
#3
A E Shklyaev, I G Malakhova, A G Bessonov, I Yu Utkin
Currently there are several dozens of hereditarily associated thrombophilias and acquired states known to condition the development of a thrombus. Thrombosis of visceral veins appears to be a considerably less often encountered event than thrombosis in the system of visceral arteries. Presented herein in the article is a clinical case report concerning subacute thrombosis of the portal, upper mesenteric and splenic veins, having developed on the background of mutations of 7 genes of the system of haemostasis in a young adult patient...
2016: Angiologii︠a︡ i Sosudistai︠a︡ Khirurgii︠a︡, Angiology and Vascular Surgery
https://www.readbyqxmd.com/read/27935887/-efficacy-of-using-rivaroxaban-for-treatment-of-heat-induced-thrombosis-after-endovenous-laser-ablation
#4
A A Fokin, D A Borsuk, E L Kazachkov
AIM: The study was aimed at assessing efficacy of using rivaroxaban for treatment of endothermal heat-induced thrombosis (EHIT) after endovenous laser ablation (EVLA) of saphenous veins. MATERIAL AND METHODS: Our prospective study included a total of 1,326 patients subjected to 1,514 EVLAs. In 1,091 (72.1%) cases the great saphenous vein (GSV) was ablated, in 124 (8.2%) cases the anterior accessory vein (AAV) was treated and in 299 (19.7%) cases the small saphenous vein (SSV) was treated...
2016: Angiologii︠a︡ i Sosudistai︠a︡ Khirurgii︠a︡, Angiology and Vascular Surgery
https://www.readbyqxmd.com/read/27935881/-contrast-free-mr-phlebography-as-a-method-of-screening-of-phlebothromboses-and-extravasal-compression-of-the-inferior-vena-cava-and-its-basin
#5
V V Shebryakov, G G Karmazanovsky, Yu M Stoiko, K V Mazaishvili, D K Lyutarevich, S Yu Kim, M V Fel'dsherov, M N Yashkin
The study was aimed at assessing possibilities and determining diagnostic significance of the method of contrast-free magnetic resonance phlebography (MR phlebography) in diagnosis of diseases of the inferior vena cava (IVC) and its basin. Presented herein is experience with examining a total of 74 patients at two therapeutic-diagnostic facilities: the National Medical Surgical Centre named after N.I. Pirogov and the Medical Diagnostic Centre "Ramsey Diagnostics". The studies were carried out on magnetic resonance tomographs "Philips Intera Nova" and "GE Optima MR360", using a special protocol of contrast-free MR-phlebography in consequences at free breathing, followed by 3D reconstruction and processing of the obtained images as MIP and 3D...
2016: Angiologii︠a︡ i Sosudistai︠a︡ Khirurgii︠a︡, Angiology and Vascular Surgery
https://www.readbyqxmd.com/read/27935296/graphene-montmorillonite-composite-sponge-for-safe-and-effective-hemostasis
#6
Guofeng Li, Kecheng Quan, Yuping Liang, Tianyi Li, Qipeng Yuan, Lei Tao, Qian Xie, Xing Wang
Montmorillonite (MMT) is considered to be the most effective hemostat among natural phyllosilicates. However, there is a barrier against using MMT for the commercial hemostatics because the invaded MMT powders might cause thrombosis in vessel. Till now, it is still a challenge to manage the release of MMT and eliminate its side effect. Herein, we present a graphene-MMT composite sponge (GMCS), synthesized under a hydrothermal reaction, fixing MMT powders into the cross-linked graphene sheets. We demonstrate that only a few embedded MMT can evoke remarkable platelet stimulation at the sponge interface, while maintaining fast plasma absorbency of the innate sponge...
December 9, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27934923/timosaponin-aiii-induces-antiplatelet-and-antithrombotic-activity-via-gq-mediated-signaling-by-the-thromboxane-a2-receptor
#7
Yue Cong, Limei Wang, Renjun Peng, Yang Zhao, Fan Bai, Chao Yang, Xiaolan Liu, Daqian Wang, Baiping Ma, Yuwen Cong
The thromboxane (Tx) A2 pathway is a major contributor to the amplification of initial platelet activation and is therefore a key drug target. To identify potent small-molecule inhibitors of the thromboxane prostaglandin (TP) receptor, we screened a small steroidal saponin library using U46619-induced rat platelet aggregation assays. Timosaponin AIII (TAIII) was identified as a potent inhibitor of U46619-induced rat platelet aggregation and exhibited superior selectivity for the TP receptor versus other G protein-coupled receptors and a PKC activator...
December 9, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27932170/living-donor-liver-transplantation-in-a-patient-with-extensive-portomesenteric-venous-thrombosis-case-report
#8
S Choi, K K Kim, W S Lee, J M Kang, Y H Park
Extensive portomesenteric venous thrombus preventing restoration of adequate portal venous flow used to be considered a contraindication to liver transplantation. The subject was a 49-year-old male with hepatitis B cirrhosis and extensive thrombosis of portal, splenic, and superior mesenteric veins, and two large collateral vessels; one dilated and tortuous inferior to the pancreaticoduodenal vein and relevant to splanchnic venous return and the other a dilated coronary vein relevant to splenic venous return...
November 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27930571/resolution-of-massive-left-atrial-appendage-thrombi-with-rivaroxaban-before-balloon-mitral-commissurotomy-in-severe-mitral-stenosis-a-case-report-and-literature-review
#9
Yuechun Li, Jiafeng Lin, Chen Peng
RATIONALE: Data on nonvitamin K antagonist oral anticoagulant being used for the treatment of LAA thrombi are limited only in nonvalvular atrial fibrillation. There are no data on the antithrombotic efficacy and safety of nonvitamin K antagonist oral anticoagulant in the resolution of left atrial appendage (LAA) thrombi in patients with rheumatic mitral stenosis. PATIENT CONCERNS: A 49-year-old woman with known rheumatic mitral stenosis and atrial fibrillation was referred for percutaneous transvenous mitral commissurotomy because of progressive dyspnea on exertion over a period of 3 months...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27930430/w1-a-novel-oral-antiplatelet-agent-with-less-resistance-than-clopidogrel
#10
Pengxin Ge, Li Du, Chunguang Han, Hui Li, Yanguo Feng, Jie Han, Zhen Wang, Liangzhong Xiong, Meiru Yuan, Yongxue Liu
Clopidogrel is a clinical antiplatelet agent, about which there are major concerns because its antiplatelet efficiency decreases with insufficient metabolic activation, leading to "clopidogrel resistance." We aimed to determine the antiplatelet effects of W1, a novel molecule composed of 2-O-clopidogrel and aspirin (1:1 ratio), on platelet aggregation ex vivo and thrombus formation in vivo, and its susceptibility to "clopidogrel resistance" in combination with other therapies in rats. Platelets were prepared, and an arteriovenous shunt thrombosis model was established using Wistar rats to measure platelet aggregation and thrombus formation, respectively...
November 24, 2016: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/27930358/histological-findings-and-predictors-of-cerebral-debris-from-transcatheter-aortic-valve-replacement-the-alster-experience
#11
Tobias Schmidt, Ozan Akdag, Peter Wohlmuth, Thomas Thielsen, Dimitry Schewel, Jury Schewel, Hannes Alessandrini, Felix Kreidel, Ralf Bader, Maria Romero, Elena Ladich, Renu Virmani, Ulrich Schäfer, Karl-Heinz Kuck, Christian Frerker
BACKGROUND: Histopathological analyses of debris captured by a cerebral protection system during transcatheter aortic valve replacement have been reported, but the origin of the captured debris was not determined and risk factors were not defined. METHODS AND RESULTS: Embolic debris was analyzed from 322 filters used in a dual-cerebral-filter protection system implemented during transcatheter aortic valve replacement for 161 patients (mean age 81 years, 82 male [51%], logistic EuroSCORE 19% [interquartile range 12-31%])...
November 10, 2016: Journal of the American Heart Association
https://www.readbyqxmd.com/read/27929569/disappearance-of-the-hyperdense-mca-sign-after-stroke-thrombolysis-implications-for-prognosis-and-early-patient-selection-for-clot-retrieval
#12
P Elofuke, J M Reid, A Rana, M-J Macleod
Disappearance of the hyperdense middle cerebral artery sign (HMCAS) following intravenous thrombolysis for ischaemic stroke is associated with improved outcome. Debate exists over which radiological thrombus characteristics can predict disappearance of the HMCAS after thrombolysis such as vessel attenuation or extent of thrombus length. Methods Ischaemic stroke patients treated with intravenous thrombolysis from our hospital were entered into a European registry. Patient demographics, stroke severity pre- and 24 hours post-thrombolysis were recorded...
June 2016: Journal of the Royal College of Physicians of Edinburgh
https://www.readbyqxmd.com/read/27929199/platelets-as-a-novel-source-of-gremlin-1-implications-for-thromboinflammation
#13
Madhumita Chatterjee, Alexander Behrendt, Martina Schmid, Sandra Beck, Martina Schneider, Andreas Mack, Iris Müller, Tobias Geisler, Meinrad Gawaz
Platelets mediating haemostasis-thrombosis are central players in coronary artery disease (CAD). We characterised platelets as a novel source of Gremlin-1. Platelets express Gremlin-1 like inflammatory and endothelial cells. Gremlin-1 co-localised with P-selectin containing randomly distributed α-granules under resting state, which were peripheralised following platelet activation or adhesion over fibrinogen-coated surface. Gremlin-1 release upon activation with ADP, CRP, and TRAP was detected as enhanced surface expression; also in activated platelet supernatant as detected by Western Blot following CRP activation and by ELISA upon activation with ADP, CRP, PAR-1, and PAR4 agonist...
December 8, 2016: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/27928935/taking-the-stock-of-granule-cargo-platelet-releasate-proteomics
#14
Oliver Pagel, Elena Walter, Kerstin Jurk, René P Zahedi
Human platelets are key players in a multitude of physiological and pathological processes. Upon activation they release cargo from different types of granules as well as microparticles in an apparently well-regulated and orchestrated manner. The resulting specific platelet releasates create microenvironments of biologically active compounds and proteins during platelet aggregation and thrombus formation, allowing efficient delivery of growth factors and immune modulators to their sites of effect and enhancing the coagulative response in a positive feedback loop...
December 8, 2016: Platelets
https://www.readbyqxmd.com/read/27928836/atrial-septal-defect-repair-gone-wrong
#15
Richard Bloomingdale, Said Ashraf, Shaun Cardozo
Isolated atrial septal defect (ASD) accounts for 13% of congenital heart disorders. The anatomic location, size, and coexistence of other cardiac anomalies determine outcomes of repair. Surgical closure was the first-choice treatment until the 1990s and remains the only treatment for large defects. We describe a case of a 64-year-old woman who underwent surgical repair for an ASD as a child in 1959. She presented with dyspnea to the hospital almost 53 years after the surgery. Diagnostic cardiac imaging revealed interesting anatomy of the repair surgery...
December 8, 2016: Echocardiography
https://www.readbyqxmd.com/read/27927771/propagation-of-thrombosis-by-neutrophils-and-extracellular-nucleosome-networks
#16
Susanne Pfeiler, Konstantin Stark, Steffen Massberg, Bernd Engelmann
Neutrophils, early mediators of innate immune defense, are recruited to developing thrombi in different types of thrombosis. They amplify intravascular coagulation by stimulating the tissue factor-dependent extrinsic pathway via inactivation of endogenous anticoagulants, enhancing factor XII activation or decreasing plasmin generation. Neutrophil-dependent prothrombotic mechanisms are supported by the externalization of decondensed nucleosomes and granule proteins that together form neutrophil extracellular traps...
December 7, 2016: Haematologica
https://www.readbyqxmd.com/read/27927214/antiplatelet-and-antithrombotic-effects-of-cordycepin-enriched-wib-801ce-from-cordyceps-militaris-ex-vivo-in-vivo-and-in-vitro
#17
Hyuk-Woo Kwon, Jung-Hae Shin, Deok Hwi Lim, Woo Jeong Ok, Gi Suk Nam, Min Ji Kim, Ho-Kyun Kwon, Jun-Hee Noh, Je-Young Lee, Hyun-Hong Kim, Jong-Lae Kim, Hwa-Jin Park
BACKGROUND: A species of the fungal genus Cordyceps has been used as a complementary and alternative medicine of traditional Chinese medicine, and its major component cordycepin and cordycepin-enriched WIB-801CE are known to have antiplatelet effects in vitro. However, it is unknown whether they have also endogenous antiplatelet and antithrombotic effects. In this study, to resolve these doubts, we prepared cordycepin-enriched WIB-801CE, an ethanol extract from Cordyceps militaris-hypha, then evaluated its ex vivo, in vivo, and in vitro antiplatelet and antithrombotic effects...
December 7, 2016: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/27925332/left-atrial-appendage-closure-with-the-new-occlutech%C3%A2-device-first-in-man-experience-and-neurological-outcome
#18
Barbara Bellmann, Steffen Schnupp, Peter Kühnlein, Christian Javernik, Caroline Kleinecke, Andreas Rillig, Ulf Landmesser, Johannes Brachmann, Jai-Wun Park
AIMS: Percutaneous left atrial appendage closure (LAAC) is a valuable treatment option for stroke prevention in patients with atrial fibrillation and a HAS-BLED-Score ≥ 3. Determinants of procedural safety events and neurological outcome of the patients with the Occlutech Device (OD) are not established yet. METHODS AND RESULTS: Between 2012 and 2016, 30 patients underwent LAAC using the OD. This is a prospective, study. Neurological examination and transesophageal echocardiography was performed directly before and after the procedure and after 1, 3 and 12 months...
December 7, 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/27925225/preclinical-study-of-anticoagulation-regimens-in-sheep-after-implantation-of-ch-vad-blood-pump
#19
Chuangye Xu, Guanghui Wu, Xiujian Liu, Yuna He, Xiaotong Hou, Haiyang Li, Chen Chen, Peng Yang, Changyan Lin
Effective anticoagulation regimens are needed to reduce risks of thrombosis and bleeding in animal models of ventricular assist device to verify its hemocompatibility, biologic safety and reliability. This study is to develop a validated anticoagulation procedure for a sheep model to test the newly developed CH-VAD. CH-VAD models were established in six healthy sheep by constructing blood bypass of left ventricle → ventricular assist device → descending aorta. Heparin infusion was used during operation and in the prior 4 days to maintain activated clotting time 1...
December 7, 2016: Artificial Organs
https://www.readbyqxmd.com/read/27924251/free-vascularized-fibular-graft-transfer-in-the-reconstruction-of-defects-for-premalignant-and-malignant-musculoskeletal-conditions-of-the-femur-in-a-tertiary-care-setting-in-pakistan-a-series-of-six-cases
#20
Avais Raja, Hana Manzoor, Imad-Ud-Din Saqib, Waqar Jan, Mamoon Rashid
OBJECTIVE: To determine the application, success and complications of the utilization of free vascularized fibular grafts (FVFG) in the reconstruction of lower limb defects after resection of primary lower limb musculoskeletal tumors. METHODOLOGY: This descriptive retrospective case series analysis was conducted at Shifa International Hospital from January 2011 to January 2016. It included patients who had premalignant and malignant conditions of the lower limb and subsequently had the lesion resected followed by FVFG surgery...
November 4, 2016: Curēus
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