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https://www.readbyqxmd.com/read/29467183/the-search-for-new-antithrombotic-mechanisms-and-therapies-that-may-spare-hemostasis
#1
Edward F Plow, Yunmei Wang, Daniel I Simon
Current antithrombotic drugs, including widely used antiplatelet agents and anticoagulants, are associated with significant bleeding risk, which increases morbidity and mortality. Nevertheless, there is emerging experimental evidence that suggests that the molecular and cellular mechanisms of hemostasis and thrombosis can be separated, thereby raising the possibility of new antithrombotic therapeutic targets with reduced bleeding risk. We summarize some recently emerging examples of agents with antithrombotic activities that seem to spare hemostasis...
February 21, 2018: Blood
https://www.readbyqxmd.com/read/29464786/polymer-free-drug-eluting-stents-for-coronary-artery-disease
#2
REVIEW
Moritz Baquet, David Jochheim, Julinda Mehilli
Polymer-free drug-eluting stents (PF-DES) were designed with the expectation of avoiding late restenosis and thrombosis related to the polymer used in traditional DES platforms. Furthermore, due to similarities with bare metal stents after drug elution, PF-DES has been considered as particularly suitable for patients at high bleeding risk. A variety of PF-DES platforms have been clinically tested. Despite their theoretical advantages, PF platforms showed comparable clinical outcomes with modern permanent- or biodegradable polymer-based DES up to 5 years after implantation...
February 20, 2018: Journal of Interventional Cardiology
https://www.readbyqxmd.com/read/29461035/heparin-eluting-electrospun-nanofiber-yarns-for-antithrombotic-vascular-sutures
#3
Sooneon Bae, Michael J DiBalsi, Nicole Meilinger, Chengqi Zhang, Erica Beal, Guzeliya Korneva, Robert O Brown, Konstantin G Kornev, Jeoung Soo Lee
The surgical connection of blood vessels, anastomosis, is a critical procedure in many reparative, transplantation, and reconstructive surgical procedures. However, effective restoration of circulation is complicated by pathological clotting (thrombosis) or progressive occlusion due to excess cell proliferation that often leads to additional surgeries and increases morbidity and mortality risk for patients. Pharmaceutical agents have been tested to prevent these complications, but many have unacceptable systemic side effects...
February 20, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29456511/p2y-12-receptors-in-tumorigenesis-and-metastasis
#4
REVIEW
Patrizia Ballerini, Melania Dovizio, Annalisa Bruno, Stefania Tacconelli, Paola Patrignani
Platelets, beyond their role in hemostasis and thrombosis, may sustain tumorigenesis and metastasis. These effects may occur via direct interaction of platelets with cancer and stromal cells and by the release of several platelet products. Platelets and tumor cells release several bioactive molecules among which a great amount of adenosine triphosphate (ATP) and adenosine diphosphate (ADP). ADP is also formed extracellularly from ATP breakdown by the ecto-nucleoside-triphosphate-diphosphohydrolases. Under ATP and ADP stimulation the purinergic P2Y1 receptor (R) initiates platelet activation followed by the ADP-P2Y12 R-mediated amplification...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29447773/percutaneous-coronary-intervention-and-antiplatelet-therapy-in-patients-with-atrial-fibrillation-receiving-apixaban-or-warfarin-insights-from-the-aristotle-trial
#5
David Kopin, W Schuyler Jones, Matthew W Sherwood, Daniel M Wojdyla, Lars Wallentin, Basil S Lewis, Freek W A Verheugt, Dragos Vinereanu, M Cecilia Bahit, Sigrun Halvorsen, Kurt Huber, Alexander Parkhomenko, Christopher B Granger, Renato D Lopes, John H Alexander
BACKGROUND: We assessed antiplatelet therapy use and outcomes in patients undergoing percutaneous coronary intervention (PCI) during the ARISTOTLE trial. METHODS: Patients were categorized based on the occurrence of PCI during follow-up (median 1.8 years); PCI details and outcomes post-PCI are reported. Of the 18,201 trial participants, 316 (1.7%) underwent PCI (152 in apixaban group, 164 in warfarin group). RESULTS: At the time of PCI, 84% (267) were on study drug (either apixaban or warfarin)...
March 2018: American Heart Journal
https://www.readbyqxmd.com/read/29436605/novel-iridium-iii-%C3%A2-derived-organometallic-compound-for-the-inhibition-of-human-platelet-activation
#6
Kou-Gi Shyu, Marappan Velusamy, Chih-Wei Hsia, Chih-Hao Yang, Chih-Hsuan Hsia, Duen-Suey Chou, Thanasekaran Jayakumar, Joen-Rong Sheu, Jiun-Yi Li
Since cisplatin achieved clinical success, transition metal platinum (Pt) drugs have been effectively used for the treatment of cancer. Iridium (Ir) compounds are considered to be potential alternatives to Pt compounds, as they possess promising anticancer effects with minor side effects. Platelet activation is associated with the metastasis and progression of cancer, and also with arterial thrombosis. Therefore, it is necessary to develop novel, effective antithrombotic agents. An Ir (III)‑derived complex, [Ir (Cp*) 1‑(2‑pyridyl)‑3‑(3‑methoxyphenyl)imidazo[1,5‑a]pyridine Cl]BF4 (Ir‑3), was developed as a novel antiplatelet drug...
February 7, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29423659/venous-thromboembolism-during-treatment-with-antipsychotics-a-review-of-current-evidence
#7
REVIEW
Anna K Jönsson, Johan Schill, Hans Olsson, Olav Spigset, Staffan Hägg
This article summarises the current evidence on the risk of venous thromboembolism (VTE) with the use of antipsychotics. An increasing number of observational studies indicate an elevated risk of VTE in antipsychotic drug users. Although the use of certain antipsychotics has been associated with VTE, current data can neither conclusively verify differences in occurrence rates of VTE between first- and second-generation antipsychotics or between individual compounds, nor identify which antipsychotic drugs have the lowest risk of VTE...
February 8, 2018: CNS Drugs
https://www.readbyqxmd.com/read/29402809/questionnaire-based-survey-on-gastrointestinal-bleeding-and-management-of-antithrombotic-agents-during-endoscopy-among-asian-countries
#8
Nanae Tsuruoka, Ryuichi Iwakiri, Yasuhisa Sakata, Kazuma Fujimoto, Takeshi Kamiya, Takashi Joh, Kengo Tokunaga, Shin'ichi Takahashi, Yoshikazu Kinoshita, Kazuhiko Uchiyama, Yuji Naito, Akihito Nagahara, Toshio Watanabe, Francis K L Chan, Ki-Baik Hahm, Udom Kachintorn, Kwong Ming Fock, Ari Fahrial Syam, Abdul Aziz Rani, Jose D Sollano, Qi Zhu
OBJECTIVE: Guidelines on the management of antithrombotic therapy for endoscopic procedures vary among countries. Differences in the management of antithrombotic agents for endoscopic procedures between Western and Eastern countries have already been reported. However, no study has investigated the differences among Asian countries. The aim of this study was to examine the differences in the etiology of gastrointestinal bleeding and management of antithrombotic agents during endoscopic procedures between Japan and other Asian countries (OAC)...
February 2, 2018: Digestion
https://www.readbyqxmd.com/read/29399040/clinical-outcome-of-patients-with-obscure-gastrointestinal-bleeding-during-antithrombotic-drug-therapy
#9
Yoshiyasu Kono, Seiji Kawano, Yuki Okamoto, Yuka Obayashi, Yuki Baba, Hiroyuki Sakae, Makoto Abe, Tatsuhiro Gotoda, Toshihiro Inokuchi, Hiromitsu Kanzaki, Masaya Iwamuro, Yoshiro Kawahara, Hiroyuki Okada
Background: The clinical outcome of patients with obscure gastrointestinal bleeding (OGIB) during antithrombotic drug therapy has not been fully investigated. Methods: Patients who underwent video capsule endoscopy (VCE) for the investigation of OGIB at Okayama University Hospital from January 2009 to March 2016 were enrolled. We evaluated the VCE findings, the patterns of OGIB, and the rate of rebleeding within 1 year in antithrombotic drug users and antithrombotic drug nonusers...
2018: Therapeutic Advances in Gastroenterology
https://www.readbyqxmd.com/read/29398173/design-of-a-randomized-placebo-controlled-trial-to-assess-dabigatran-and-omeprazole-in-patients-with-myocardial-injury-after-noncardiac-surgery-manage
#10
Emmanuelle Duceppe, Salim Yusuf, Vikas Tandon, Reitze Rodseth, Bruce M Biccard, Denis Xavier, Wojciech Szczeklik, Christian S Meyhoff, Maria Grazia Franzosi, Jessica Vincent, Sadeesh K Srinathan, Joel Parlow, Patrick Magloire, John Neary, Mangala Rao, Navneet K Chaudhry, Bongani Mayosi, Miriam de Nadal, Ekaterine Popova, Juan Carlos Villar, Fernando Botto, Otavio Berwanger, Gordon Guyatt, John W Eikelboom, Daniel I Sessler, Clive Kearon, Shirley Pettit, Stuart J Connolly, Mukul Sharma, Shrikant I Bangdiwala, P J Devereaux
BACKGROUND: Worldwide approximately 200 million adults undergo major surgery annually, of whom 8 million are estimated to suffer a myocardial injury after noncardiac surgery (MINS). There is currently no trial data informing the management of MINS. Antithrombotic agents such as direct oral anticoagulants might prevent major vascular complications in patients with MINS. METHODS: The Management of Myocardial Injury After Noncardiac Surgery (MANAGE) trial is a large international blinded randomized controlled trial of dabigatran vs placebo in patients who suffered MINS...
February 2, 2018: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/29393134/safety-of-cold-polypectomy-for-colorectal-polyps-in-patients-on-antithrombotic-medication
#11
Mio Matsumoto, Shinji Yoshii, Taku Shigesawa, Masayoshi Dazai, Manabu Onodera, Mototsugu Kato, Naoya Sakamoto
BACKGROUND: The cold polypectomy (CP) technique has been increasingly used in recent years. However, there have been few studies about post-polypectomy bleeding (PPB) in patients who underwent CP and who were on antithrombotic drugs. The objective of this study was to determine the safety of CP in patients on antithrombotic medication. METHODS: The subjects were patients who underwent CP in our hospital between April 2014 and March 2016. PPB rates were examined in relation to the use of antithrombotic medication...
February 1, 2018: Digestion
https://www.readbyqxmd.com/read/29390379/successful-coronary-stenting-in-a-patient-with-factor-v-deficiency-in-the-absence-of-fresh-frozen-plasma-transfusion-case-report
#12
Seongil Choi, MooKon Song
RATIONALE: Drug-eluting stent (DES) implantation in a patient with factor V deficiency (F5D) is very complex. No antithrombotic therapy study has been reported for F5D patients who undergo a coronary stenting procedure. PATIENT CONCERNS: A 73-year-old woman presented with chest discomfort and exertional dyspnea. Coronary stenting was performed successfully using DES stents. DIAGNOSES: The D-dimer, prothrombin time, and partial thromboplastin time prolongation persisted from admission until 24 hours after coronary stenting...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29381951/watchman-device-related-thrombus-successfully-treated-with-apixaban-a-case-report
#13
Chun-Ka Wong, Pak-Hei Chan, Cheung-Chi Lam, On-Hing Kwok, Yat-Yin Lam, Chung-Wah Siu
RATIONALE: Among atrial fibrillation patients with high risk of bleeding, left atrial appendage occlusion has emerged as an alternative to long-term oral anticoagulation therapy for stroke prevention. Device-related thrombus remains a major concern because it may result in recurrent embolic events. To date, there is no consensus on the optimal method of treating device-related-thrombus. PATIENT CONCERNS: A 78-year-old man with atrial fibrillation had an episode of intracranial hemorrhage while taking warfarin...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29378359/dimeric-glycoprotein-vi-binds-to-collagen-but-not-to-fibrin
#14
Mariam Ebrahim, Janina Jamasbi, Kristin Adler, Remco T A Megens, Yacine M'Bengue, Xavier Blanchet, Kerstin Uhland, Martin Ungerer, Richard Brandl, Christian Weber, Natalie Elia, Reinhard Lorenz, Götz Münch, Wolfgang Siess
Platelet glycoprotein VI (GPVI) acts as a decisive collagen receptor in atherothrombosis. Besides collagen, injured atherosclerotic plaques expose tissue factor (TF) that triggers fibrin formation. Two recent studies reported that platelet GPVI also functions as fibrin receptor, which would importantly widen the mode of action of GPVI-targeted antithrombotic drugs. We studied the binding of two GPVI fusion proteins to fibrin under static and arterial flow conditions. Fibrin was prepared from purified fibrinogen or generated more physiologically from endogenous fibrinogen by coagulating plasma with thrombin...
February 2018: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/29372262/vascular-endothelium-dysfunction-a-conservative-target-in-metabolic-disorders
#15
REVIEW
Shalini Jamwal, Saurabh Sharma
AIM: Vascular endothelium plays a role in capillary transport of nutrients and drugs and regulates angiogenesis, homeostasis, as well as vascular tone and permeability as a major regulator of local vascular homeostasis. The present study has been designed to investigate the role of endothelium in metabolic disorders. METHODS: The endothelium maintains the balance between vasodilatation and vasoconstriction, procoagulant and anticoagulant, prothrombotic and antithrombotic mechanisms...
January 25, 2018: Inflammation Research: Official Journal of the European Histamine Research Society ... [et Al.]
https://www.readbyqxmd.com/read/29370229/risk-factors-for-death-stroke-and-bleeding-in-28-628-patients-from-the-garfield-af-registry-rationale-for-comprehensive-management-of-atrial-fibrillation
#16
Jean-Pierre Bassand, Gabriele Accetta, Wael Al Mahmeed, Ramon Corbalan, John Eikelboom, David A Fitzmaurice, Keith A A Fox, Haiyan Gao, Samuel Z Goldhaber, Shinya Goto, Sylvia Haas, Gloria Kayani, Karen Pieper, Alexander G G Turpie, Martin van Eickels, Freek W A Verheugt, Ajay K Kakkar
BACKGROUND: The factors influencing three major outcomes-death, stroke/systemic embolism (SE), and major bleeding-have not been investigated in a large international cohort of unselected patients with newly diagnosed atrial fibrillation (AF). METHODS AND RESULTS: In 28,628 patients prospectively enrolled in the GARFIELD-AF registry with 2-year follow-up, we aimed at analysing: (1) the variables influencing outcomes; (2) the extent of implementation of guideline-recommended therapies in comorbidities that strongly affect outcomes...
2018: PloS One
https://www.readbyqxmd.com/read/29362190/which-antiplatelet-therapy-in-patients-with-left-ventricular-assist-device-and-aspirin-allergy
#17
Filippo Consolo, Loris Pozzi, Giulia Sferrazza, Patrizia Della Valle, Armando D'Angelo, Marvin J Slepian, Federico Pappalardo
In patients with left ventricular assist device support and aspirin allergy, the choice of effective antiplatelet strategy remains a challenge. We compared the antithrombotic effect of clopidogrel vs ticagrelor in an LVAD patient with aspirin allergy by using a modified protocol of the thrombin generation test, accounting selectively for the platelet contribution on thrombin generation. Our results demonstrate enhanced antithrombotic efficacy offered by ticagrelor. Consistent with experimental results, the patient has passed more than 300 days without thromboembolic complications...
February 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29355554/dual-inhibition-of-hy023016-based-on-binding-properties-of-platelet-membrane-receptor-subunit-glycoprotein-ib%C3%AE-and-thrombin-exosites
#18
Qiu-Fang Chen, Shuang Cui, Hui-Liang Shen, Xiang Chen, Yun-Zhan Li, Qian Wu, Yun-Gen Xu, Guo-Qing Gong
Thrombin has long been suggested as a desirable antithrombotic target, but anti-thrombin therapy without anti-platelet thereby has never achieved the ideal effect. HY023016 is a novel compound, in our previous study, it exerted better anti-thrombotic than dabigatran etexilate. The present study aims to illustrate the excess anti-thrombotic molecular mechanisms of HY023016 through thrombin anion exosites and the platelet membrane receptor subunit glycoprotein Ibα (GPIbα). HY023016 strongly inhibited the conversion of fibrinogen to fibrous may via blocking thrombin exosite I...
January 17, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29353071/effects-of-warfarin-on-biological-processes-other-than-haemostasis-a-review
#19
REVIEW
Aleksandra Popov Aleksandrov, Ivana Mirkov, Marina Ninkov, Dina Mileusnic, Jelena Demenesku, Vesna Subota, Dragan Kataranovski, Milena Kataranovski
Warfarin is the world's most widely used anticoagulant drug. Its anticoagulant activity is based on the inhibition of the vitamin K-dependent (VKD) step in the complete synthesis of a number of blood coagulation factors that are required for normal blood coagulation. Warfarin also affects synthesis of VKD proteins not related to haemostasis including those involved in bone growth and vascular calcification. Antithrombotic activity of warfarin is considered responsible for some aspects of its anti-tumour activity of warfarin...
January 15, 2018: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29344570/use-of-anticoagulant-or-antiplatelet-agents-is-not-related-to-epistaxis-in-patients-undergoing-transnasal-endoscopy
#20
Yoshiya Kobayashi, Yoshinori Komazawa, Mika Yuki, Hitomi Ishitobi, Makoto Nagaoka, Yoshiko Takahashi, Sayaka Nakashima, Toshihiro Shizuku, Yoshikazu Kinoshita
Background and study aims : Unsedated transnasal endoscopy (uTNE) has become accepted as a safe and tolerable method for upper gastrointestinal tact examinations. Epistaxis is 1 of the major complications of TNE, though its risk factors have not been elucidated. Generally, patients administered an anticoagulant or antiplatelet drug are considered to have an increased risk of epistaxis during TNE. Here, we investigated risk factors of epistaxis in patients undergoing uTNE, with focus on those who received antithrombotic agents...
January 2018: Endoscopy International Open
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