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Tissue plasminogen activator

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https://www.readbyqxmd.com/read/28092924/evaluation-of-the-use-of-rotational-thromboelastometry-in-the-assessment-of-fxi-deficency
#1
G N Pike, A M Cumming, J Thachil, C R M Hay, P H B Bolton-Maggs, J Burthem
INTRODUCTION: The absence of a reliable clinical test to predict bleeding tendency leaves factor XI (FXI)-deficient individuals at risk of overtreatment or under treatment. AIM: To assess whether rotational thromboelastometry has value in detection of FXI deficiency and identification of bleeding tendency. METHODS: Thromboelastometry was measured in whole blood and platelet-rich plasma (PRP) samples containing corn trypsin inhibitor (CTI) from controls (n = 50) and FXI-deficient individuals (n = 93) at tissue factor (TF) 0...
January 16, 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/28091772/transient-expression-of-recombinant-tissue-plasminogen-activator-rt-pa-gene-in-cucurbit-plants-using-viral-vector
#2
Vahid Jalali Javaran, Alireza Shafeinia, Mokhtar Jalali Javaran, Esmaeil Ghasemi Gojani, Malihe Mirzaee
OBJECTIVE: To use a transient expression system to express a truncated human tissue plasminogen activator (K2S) gene in cucurbit plants. RESULTS: The recombinant tissue plasminogen activator protein (K2S form) was expressed in active form in cucurbit plants. Its molecular weight was 43 kDa. The plant-derived rt-PA was determined using goat anti-rabbit antibody by western blotting. Among the infected lines, the highest expression of rt-PA was 62 ng/100 mg per leaf tissue as measured by ELISA...
January 16, 2017: Biotechnology Letters
https://www.readbyqxmd.com/read/28090093/upar-promotes-tumor-like-biologic-behaviors-of-fibroblast-like-synoviocytes-through-pi3k-akt-signaling-pathway-in-patients-with-rheumatoid-arthritis
#3
Yan Liu, Yun Feng Pan, You-Qiu Xue, Lin-Kai Fang, Xing-Hua Guo, Xin Guo, Meng Liu, Bi-Yao Mo, Meng-Ru Yang, Fang Liu, Yun-Ting Wu, Nancy Olsen, Song Guo Zheng
Urokinase-type plasminogen activator receptor (uPAR), is a multifunctional receptor on cell surface, widely present in endothelial cells, fibroblasts, and a variety of malignant cells. Current studies have suggested that uPAR overexpressed on synovial tissues or in synovial fluid or plasma in patients with rheumatoid arthritis (RA). However, there are limited researches regarding the role of uPAR on fibroblast-like synoviocytes of rheumatoid arthritis (RA-FLSs) and its underlying mechanisms. Here, our studies show that the expression of uPAR protein was significantly higher in fibroblast-like synoviocytes (FLSs) from RA than those from osteoarthritis or traumatic injury patients...
January 16, 2017: Cellular & Molecular Immunology
https://www.readbyqxmd.com/read/28088270/association-of-plasminogen-activator-inhibitor-1-and-vitamin-d-receptor-expression-with-the-risk-of-keloid-disease-in-a-chinese-population
#4
Zhen-Hua Gong, Jian-Feng Ji, Jun Yang, Tie Xiang, Chang-Kai Zhou, Xuan-Liang Pan, Jian Yao
Keloid disease (KD) is a benign fibroproliferative scarring condition of unknown etiopathogenesis. Plasminogen activator inhibitor-1 (PAI-1) and vitamin D receptor (VDR) have been shown to play important roles in the progression of tissue fibrosis; therefore, both these genes are potential susceptibility genes for KD. We aimed to determine whether the gene expression levels of PAI-1 and VDR are altered in Chinese KD patients. We measured the expression of PAI and VDR in human peripheral blood lymphocytes in 236 patients with keloid and 219 age- and sex-matched healthy controls by quantitative real-time polymerase chain reaction...
January 2017: Kaohsiung Journal of Medical Sciences
https://www.readbyqxmd.com/read/28087157/the-association-of-blood-urea-nitrogen-levels-with-mortality-in-acute-pulmonary-embolism
#5
Mustafa A Tatlisu, Adnan Kaya, Muhammed Keskin, Sahin Avsar, Mehmet Bozbay, Kiymet Tatlisu, Mehmet Eren
BACKGROUND: The aim of this study was to investigate the association of BUN levels with in-hospital and long-term adverse clinical outcomes in acute pulmonary embolism (APE) patients treated with tissue-plasminogen activator (t-PA). METHODS: This retrospective study included 252 consecutive confirmed APE patients treated with t-PA. An admission BUN of 34.5 mg/dL was identified through an ROC analysis as an optimal cutoff value to predict the in-hospital mortality with 85% sensitivity and 91% specificity (AUC: 0...
December 29, 2016: Journal of Critical Care
https://www.readbyqxmd.com/read/28081351/the-effect-of-methylprednisolone-treatment-on-fibrinolysis-thecoagulation-system-and-blood-loss-in-cardiac-surgery
#6
Leila Ebrahimi, Maryam Kheirandish, Mahnoosh Foroughi
BACKGROUND/AIM: The purpose of this study was to examine steroid pretreatment in order to decrease postoperative coagulopathy disorders and bleeding. MATERIALS AND METHODS: In this randomized double-blinded study, the efficacy of low versus high doses of methylprednisolone on the coagulation system and postoperative bleeding was compared in patients who were undergoing cardiac surgery with cardiopulmonary bypass (CPB). The platelet response to agonists, D-dimer concentration, tissue plasminogen activator (tPA), plasminogen activator inhibitor (PAI-1) antigens, and platelet receptors CD42b, CD62P, and CD41a were evaluated...
December 20, 2016: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28079884/lack-of-collagen-xv-is-protective-after-ischemic-stroke-in-mice
#7
Hiramani Dhungana, Mikko T Huuskonen, Taina Pihlajaniemi, Ritva Heljasvaara, Denis Vivien, Katja M Kanninen, Tarja Malm, Jari Koistinaho, Sighild Lemarchant
Collagens are key structural components of basement membranes, providing a scaffold for other components or adhering cells. Collagens and collagen-derived active fragments contribute to biological activities such as cell growth, differentiation and migration. Here, we report that collagen XV knock-out (ColXV KO) mice are resistant to experimental ischemic stroke. Interestingly, the infarcts of ColXV KO mice were as small as those of wild-type (WT) mice thrombolysed with recombinant tissue plasminogen activator (rtPA), the actual treatment for ischemic stroke...
January 12, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28079666/intravenous-tissue-plasminogen-activator-administration-for-ischemic-stroke-1-hour-after-epidural-catheter-removal-a-case-report
#8
Anne M Baciewicz, Calvin Lee, Alon Ben-Ari, Hojoong Kim, Alex T Lee
Anticoagulation after a recent neuraxial procedure poses risk for development of spinal hematoma. Clinical evidence supports prompt IV tissue plasminogen activator administration after onset of ischemic stroke. There is an absence of data regarding emergency fibrinolytic therapy for patients experiencing a stroke with recent neuraxial procedures, resulting in highly disparate, nonevidence-based guidelines. This report describes a patient who developed ischemic stroke when receiving postoperative epidural analgesia...
January 11, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28079650/pneumatic-displacement-of-limited-traumatic-submacular-hemorrhage-without-tissue-plasminogen-activator-a-case-series
#9
Poornachandra Balughatta, Venkatesh Kadri, Sherine Braganza, Chaitra Jayadev, Ruchir A Mehta, Vikram Nakhate, Naresh K Yadav, Rohit Shetty
PURPOSE: To evaluate the efficacy of intravitreal gas (perfluoropropane, C3F8)-assisted displacement of submacular hemorrhage (SMH) secondary to recent or old blunt trauma. METHODS: An interventional case series of three patients who presented with SMH after blunt trauma, ranging from 2 days to 2 weeks back. All three patients were treated with an intravitreal injection of 0.3 cc of 100% C3F8 with anterior chamber paracentesis. Strict prone position was advised for 2 weeks with a minimum of 6 to 8 hours per day...
January 10, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28079399/safety-and-efficacy-of-tissue-plasminogen-activator-tpa-and-deoxyribonuclease-dnase-for-complicated-pleural-effusions-secondary-to-abdominal-pathology
#10
Adnan Majid, Sebastian Ochoa, Sumit Chatterji, Sebastian Fernandez-Bussy, Fayez Kheir, Estefania Rivera, George Cheng, Erik Folch
RATIONALE: Exudative pleural effusions may arise secondary to inflammation of intra-abdominal structures. Pleural space loculations can complicate these effusions, preventing adequate chest tube drainage and leading to consideration of surgical intervention. Previous studies have demonstrated that intrapleural administration of tissue plasminogen activator (tPA) combined with human recombinant deoxyribonuclease (DNase) can improve fluid drainage and reduce surgery for patients with loculated parapneumonic effusions; however, the efficacy of this treatment has not been evaluated for complicated pleural effusions attributed to intraabdominal inflammation...
January 12, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28069710/stroke-treatment-with-intravenous-tissue-type-plasminogen-activator-more-proof-that-time-is-brain
#11
EDITORIAL
Mark J Alberts
No abstract text is available yet for this article.
January 10, 2017: Circulation
https://www.readbyqxmd.com/read/28067616/management-of-acute-central-retinal-artery-occlusion-intravenous-thrombolysis-is-feasible-and-safe
#12
Cécile Préterre, Gaelle Godeneche, Xavier Vandamme, Thomas Ronzière, Matthias Lamy, Christophe Breuilly, Cédric Urbanczyk, Valérie Wolff, Pierre Lebranchu, Mathieu Sevin-Allouet, Benoit Guillon
Background Although acute central retinal artery occlusion is as a stroke in the carotid territory (retinal artery), its management remains controversial. The aim of this study was to assess the feasibility and safety of intravenous thrombolysis delivered within 6 h of central retinal artery occlusion in French stroke units. Methods We performed a retrospective analysis of patients treated with intravenous alteplase (recombinant tissue-plasminogen activator), based on stroke units thrombolysis registers from June 2005 to June 2015, and we selected those who had acute central retinal artery occlusion...
January 1, 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/28065908/ticagrelor-but-not-clopidogrel-active-metabolite-displays-antithrombotic-properties-in-the-left-atrial-endocardium
#13
Martin F Reiner, Alexander Breitenstein, Erik W Holy, Martina Glanzmann, Heidi Amstalden, Simon F Stämpfli, Nicole R Bonetti, Volkmar Falk, Stephan Keller, Gianluigi Savarese, Stefano Benussi, Francesco Maisano, Thomas F Lüscher, Jürg H Beer, Jan Steffel, Giovanni G Camici
AIMS: Oral anticoagulation is considered standard therapy for stroke prevention in atrial fibrillation (AF). Endocardial activation triggers expression of pro-thrombotic mediators including tissue factor (TF) and plasminogen activator inhibitor-1 (PAI-1), and contributes to thrombus formation in the left atrial appendage (LAA) of AF patients. Recently, pleiotropic effects of specific P2Y12 receptor antagonists were demonstrated; however, whether these drugs possess antithrombotic effects on LAA endocardial cells currently remains unknown...
January 8, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28065404/cerebral-microbleeds-and-risk-of-intracerebral-hemorrhage-post-intravenous-thrombolysis
#14
Ramin Zand, Georgios Tsivgoulis, Mantinderpreet Singh, Michael McCormack, Nitin Goyal, Muhammad Fawad Ishfaq, Reza Bavarsad Shahripour, Katherine Nearing, Lucas Elijovich, Anne W Alexandrov, David S Liebeskind, Andrei V Alexandrov
BACKGROUND: Stroke patients who have cerebral micro bleeds (CMBs) could be potentially at a greater risk for symptomatic intracerebral hemorrhage (sICH) than those patients without CMBs. The aim of our study was to investigate whether the presence and burden of CMBs are associated with post IVT sICH. METHODS: In this multicenter study, consecutive patients treated with intravenous tissue plasminogen activator were prospectively identified and analyzed. Patients without magnetic resonance imaging (MRI) within 24 hours of treatment were excluded...
January 3, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28062805/intravenous-thrombolysis-before-endovascular-therapy-for-large-vessel-strokes-can-lead-to-significantly-higher-hospital-costs-without-improving-outcomes
#15
Ansaar T Rai, SoHyun Boo, Chelsea Buseman, Amelia K Adcock, Abdul R Tarabishy, Maurice M Miller, Thomas D Roberts, Jennifer R Domico, Jeffrey S Carpenter
BACKGROUND: Limited efficacy of IV recombinant tissue plasminogen activator (rt-PA) for large vessel occlusions (LVO) raises doubts about its utility prior to endovascular therapy. PURPOSE: To compare outcomes and hospital costs for anterior circulation LVOs (middle cerebral artery, internal carotid artery terminus (ICA-T)) treated with either primary endovascular therapy alone (EV-Only) or bridging therapy (IV+EV)). METHODS: A single-center retrospective analysis was performed...
January 6, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/28062207/cardiometabolic-biomarkers-are-predictors-of-readmission-and-death-in-patients-hospitalized-for-acute-dyspnea
#16
Nathalie Lund, Klas Gränsbo, Camilla Wernersson, Olle Melander
BACKGROUND: Acute dyspnea affects a large heterogeneous patient group with high mortality and readmission rates. PURPOSE: To investigate if cardiometabolic biomarkers and clinical characteristics predict readmission and death in patients hospitalized for acute dyspnea. METHODS: 65 dyspnea patients at a general internal medicine ward were followed for six months. The combined endpoint was readmission or death. MEASUREMENTS AND RESULTS: Cardiometabolic biomarkers at admission were related to the endpoint in Cox proportional hazard models (adjusted for sex, age, oxygen saturation, respiratory rate and C-reactive protein (CRP))...
December 22, 2016: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28060552/the-root-extract-of-gentiana-macrophylla-pall-alleviates-b19-ns1-exacerbated-liver-injuries-in-nzb-w-f1-mice
#17
Ming-Jen Sheu, Chun-Ching Chiu, Deng-Jye Yang, Tsai-Ching Hsu, Bor-Show Tzang
The nonstructural protein NS1 of human parvovirus B19 (B19) is known to exacerbate disease activity in systemic lupus erythematosus (SLE). However, no specific medicine for B19 infection is available. The roots of Gentiana macrophylla Pall. (GM), the traditional Chinese medicine "Qinjiao," have been used for centuries to treat rheumatic disease, including SLE. Herein, we aimed to investigate the effects of GM root extract (100 and 300 mg/kg body weight) on B19-NS1-exacerbated liver injury in NZB/W F1 mice; liver tissues were assessed by hematoxylin-eosin staining and immunoblotting...
January 6, 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28060391/intravitreal-versus-subretinal-tissue-plasminogen-activator-injection-for-submacular-hemorrhage
#18
James E Bell, Julia P Shulman, Russell J Swan, Michael P Teske, Paul S Bernstein
BACKGROUND AND OBJECTIVE: The objective of this study was to compare visual acuity outcomes between the following procedures used to treat submacular hemorrhages: pneumatic displacement followed by intravitreal tissue plasminogen activator (tPA) if needed (pneumatic ± tPA) and pars plana vitrectomy (PPV) with subretinal tPA (PPV + tPA). PATIENTS AND METHODS: This is a retrospective chart review of submacular hemorrhages treated with either pneumatic ± tPA or PPV + tPA...
January 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28060219/multicenter-study-of-adverse-events-after-intravenous-tissue-type-plasminogen-activator-treatment-of-acute-ischemic-stroke
#19
Hannah Fernandez-Gotico, Tiffany Lightfoot, Melissa Meighan
BACKGROUND AND PURPOSE: The approved treatment by the Food and Drug Administration for acute ischemic stroke is intravenous tissue-type plasminogen activator (IV tPA). After IV tPA administration, patients are monitored for adverse events using an American Heart Association/American Stroke Association guideline instituted in 1996. There is limited evidence describing the safest and most efficient method to monitor patients during the first 24 hours after tPA administration. Although the overall rates of adverse events have been reported, the time when patients may be at most risk for an event has not been studied...
February 2017: Journal of Neuroscience Nursing: Journal of the American Association of Neuroscience Nurses
https://www.readbyqxmd.com/read/28059802/recent-progress-in-translational-research-on-neurovascular-and-neurodegenerative-disorders
#20
Hans-Ulrich Demuth, Rick M Dijkhuizen, Tracy D Farr, Mathias Gelderblom, Karen Horsburgh, Costantino Iadecola, Damian D Mcleod, Dominik Michalski, Tim H Murphy, Josune Orbe, Willem M Otte, Gabor C Petzold, Nikolaus Plesnila, Georg Reiser, Klaus G Reymann, Maria A Rueger, Dorothee Saur, Sean I Savitz, Stephan Schilling, Neil J Spratt, Renée J Turner, Raghu Vemuganti, Denis Vivien, Manuel Yepes, Marietta Zille, Johannes Boltze
The already established and widely used intravenous application of recombinant tissue plasminogen activator as a re-opening strategy for acute vessel occlusion in ischemic stroke was recently added by mechanical thrombectomy, representing a fundamental progress in evidence-based medicine to improve the patient's outcome. This has been paralleled by a swift increase in our understanding of pathomechanisms underlying many neurovascular diseases and most prevalent forms of dementia. Taken together, these current advances offer the potential to overcome almost two decades of marginally successful translational research on stroke and dementia, thereby spurring the entire field of translational neuroscience...
January 3, 2017: Restorative Neurology and Neuroscience
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