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Tissue plasminogen activator

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https://www.readbyqxmd.com/read/27922933/the-cross-sectional-association-between-vasomotor-symptoms-and-hemostatic-parameter-levels-in-postmenopausal-women
#1
Laura B Harrington, Marc Blondon, Mary Cushman, Andrew M Kaunitz, Jacques E Rossouw, Matthew A Allison, Lisa W Martin, Karen C Johnson, Jan Rosing, Nancy F Woods, Andrea Z LaCroix, Susan R Heckbert, Barbara McKnight, Nicholas L Smith
OBJECTIVE: Vasomotor symptoms (VMS) may be a marker of cardiovascular risk. We aimed to evaluate the cross-sectional association of VMS presence and severity with hemostatic parameter levels measured at baseline among Women's Health Initiative (WHI) Hormone Therapy trial postmenopausal participants. METHODS: This cross-sectional analysis included 2,148 postmenopausal women with measures of VMS presence and severity reported in the 4 weeks before WHI baseline, who were not using warfarin or hormone therapy and for whom the following baseline hemostatic parameters were measured within the WHI Cardiovascular Disease Biomarker Case-Control Study: antithrombin, plasminogen activator inhibitor-1, protein C antigen, total and free protein S antigen, total and free tissue factor pathway inhibitor, D-dimer, normalized activated protein C sensitivity ratio, and thrombin generation...
December 5, 2016: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/27920878/utilization-of-bedside-ultrasound-in-the-diagnosis-and-management-of-massive-pulmonary-embolism-a-case-report
#2
Osman Z Abbasi, Thanhnga T Doan, Sumit Duggal, Sanjeev U Nair, Shawn M Quinn
The prompt diagnosis and treatment of massive pulmonary embolism is a well-known challenge for physicians. We report a case of a 61-year-old hemodynamically unstable man who presented to the emergency department with complaints of acute dyspnea. After performing a focused history and physical, we used bedside ultrasound to diagnose significant right heart strain, which suggested massive bilateral pulmonary embolisms. This diagnosis was further supported by the visualization of deep venous thrombosis in the left lower extremity...
December 2016: Radiology case reports
https://www.readbyqxmd.com/read/27919947/high-fat-diet-enhances-mammary-tumorigenesis-and-pulmonary-metastasis-and-alters-inflammatory-and-angiogenic-profiles-in-mmtv-pymt-mice
#3
Sneha Sundaram, Lin Yan
The MMTV-PyMT transgenic mouse model is commonly used to study luminal B subtype, which has a lower prevalence but a worse prognosis than luminal A subtype among patients with breast cancer. The objective of the present study was to determine whether an obesogenic, high-fat diet enhances primary tumorigenesis and pulmonary metastasis in female MMTV-PyMT mice. The high-fat diet slightly but significantly increased caloric intake and body fat mass compared to the AIN93G diet. The high-fat diet significantly increased primary mammary tumor progression by 59%, primary tumor weight by 60%, and the number of lung metastases by 147%...
December 2016: Anticancer Research
https://www.readbyqxmd.com/read/27904545/treatment-of-recurrent-prosthetic-mitral-valve-thrombosis-with-reteplase-a-report-of-four-cases
#4
Neda Behzadnia, Babak Sharif Kashani, Arda Kiani, Atefe Abedini, Seyed Reza Seyedi, Hossein Zargham Ahmadi, Farah Naghash Zadeh, Atefeh Fakharian
Thrombosis is a life threatening complications of prosthetic mitral valves and is associated with high morbidity and mortality. Even in presence of systemic anticoagulation prosthetic valve thrombosis has an incidence of 0.5% to 8%. Recurrent prosthetic valve thrombosis and the resulting thrombotic occlusion require re-establishment of blood flow across the valve. While surgical repair is considered the classic first line treatment option for prosthetic valve thrombosis, intravenous thrombolysis has emerged as an acceptable alternative for the first episode of prosthetic valve thrombosis...
2016: Tanaffos
https://www.readbyqxmd.com/read/27899742/acute-endovascular-treatment-delivery-to-ischemic-stroke-patients-transferred-within-a-telestroke-network-a-retrospective-observational-study
#5
Jessica Barlinn, Johannes Gerber, Kristian Barlinn, Lars-Peder Pallesen, Timo Siepmann, Charlotte Zerna, Claudia Wojciechowski, Volker Puetz, Rüdiger von Kummer, Heinz Reichmann, Jennifer Linn, Ulf Bodechtel
BACKGROUND: Five randomized controlled trials recently demonstrated efficacy of endovascular treatment in acute ischemic stroke. Telestroke networks can improve stroke care in rural areas but their role in patients undergoing endovascular treatment is unknown. AIM: We compared clinical outcomes of endovascular treatment between anterior circulation stroke patients transferred after teleconsultation and those directly admitted to a tertiary stroke center. METHODS: Data derived from consecutive patients with intracranial large vessel occlusion who underwent endovascular treatment from January 2010 to December 2014 at our tertiary stroke center...
November 29, 2016: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/27899519/initial-clinical-experience-using-the-two-stage-aspiration-technique-tsat-with-proximal-flow-arrest-by-a-balloon-guiding-catheter-for-acute-ischemic-stroke-of-the-anterior-circulation
#6
Hiroyuki Matsumoto, Hirokazu Nishiyama, Yoshiaki Tetsuo, Hideki Takemoto, Naoyuki Nakao
BACKGROUND: Our initial experience using the two-stage aspiration technique (TSAT) with proximal flow arrest by a balloon guiding catheter is presented. In TSAT, aspiration is applied with the 5MAX ACE and also with the 3MAX catheter with a Penumbra aspiration pump, while arresting proximal flow by balloon inflation. METHODS: In patients treated with TSAT, clinical data including National Institutes of Health Stroke Scale (NIHSS) score at admission and the modified Rankin Scale (mRS) score at discharge, as well as procedural data including the Thrombolysis in Cerebral Infarction (TICI) score, procedural time, and complications were analyzed...
November 29, 2016: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/27898513/inhibition-of-plasmin-generation-in-plasma-by-heparin-low-molecular-weight-heparin-and-a-covalent-antithrombin-heparin-complex
#7
Gabriela M T Chang, Helen M Atkinson, Leslie R Berry, Anthony K C Chan
The clinical limitations of unfractionated heparin (UFH) and low molecular weight heparin (LMWH) led to the development of an antithrombin-heparin covalent complex (ATH), which displays superior anticoagulant abilities compared with UFH. A recent study investigating its interaction with fibrinolysis showed that ATH inhibited free and fibrin bound plasmin and decreased plasmin generation on fibrin clots. These studies were conducted using purified components and did not elucidate the interaction of ATH with plasmin in the presence of its natural inhibitors α2-antiplasmin (α2-AP) and α2-macroglobulin (α2-M)...
November 24, 2016: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/27898168/the-association-between-t-pa-administration-and-in-hospital-mortality-following-acute-ischemic-stroke-in-puerto-rican-patients
#8
Kevin Shah, Samuel Kohrman, Suehyb Alkhatib, Juan González, Fernando Santiago, Marcia Varella, Juan Zevallos
OBJECTIVE: Despite being the standard of care, thrombolytic therapy with tissue plasminogen activator (t-PA) is currently administered to only 5% of acute ischemic stroke (AIS) patients in the United States. Published scientific information regarding both the use of t-PA for AIS in Hispanic patients and its impact on short-term mortality is scarce. The objectives of this study are to investigate, among Puerto Rican patients hospitalized with AIS, the rate of t-PA administration, and the risk of in-hospital mortality in patients who received t-PA vs...
December 2016: Puerto Rico Health Sciences Journal
https://www.readbyqxmd.com/read/27896225/the-urokinase-urokinase-receptor-system-in-mast-cells-effects-of-its-functional-interaction-with-fmlf-receptors
#9
Francesca Wanda Rossi, Nella Prevete, Felice Rivellese, Filomena Napolitano, Nunzia Montuori, Loredana Postiglione, Carmine Selleri, Amato de Paulis
Mast cell and basophils express the high affinity receptor for IgE (FcɛRI) and are primary effector cells of allergic disorders. The urokinase (uPA)-mediated plasminogen activation system is involved in physiological and pathological events based on cell migration and tissue remodelling, such as inflammation, wound healing, angiogenesis and metastasis. uPA is a serine protease that binds uPAR, a high affinity glycosyl-phosphatidyl-inositol (GPI)-anchored receptor. uPAR focuses uPA activity at the cell surface and activates intracellular signaling through lateral interactions with integrins, receptor tyrosine kinases and the G-protein-coupled family of fMLF chemotaxis receptors (FPRs)...
November 2016: Translational Medicine @ UniSa
https://www.readbyqxmd.com/read/27894558/helicopter-scene-response-for-stroke-patients-a-5-year-experience
#10
Andrew Hawk, Catherine Marco, Matt Huang, Bonnie Chow
OBJECTIVE: The purpose of this study was to examine the usefulness of an emergency medical service (EMS)-requested air medical helicopter response directly to the scene for a patient with clinical evidence of an ischemic cerebrovascular accident (CVA) and transport to a regional comprehensive CVA center. METHODS: CareFlight, an air medical critical care transportation service, is based in Dayton, OH. The 3 CareFlight helicopters are geographically located and provided transport to all CVA scene patients in this study...
November 2016: Air Medical Journal
https://www.readbyqxmd.com/read/27891126/the-ly49e-receptor-inhibits-the-immune-control-of-acute-trypanosoma-cruzi-infection
#11
Jessica Filtjens, Nicolas Coltel, Sabrina Cencig, Sylvie Taveirne, Els Van Ammel, Aline Van Acker, Tessa Kerre, Patrick Matthys, Tom Taghon, Bart Vandekerckhove, Yves Carlier, Carine Truyens, Georges Leclercq
The protozoan parasite Trypanosoma cruzi circulates in the blood upon infection and invades various cells. Parasites intensively multiply during the acute phase of infection and persist lifelong at low levels in tissues and blood during the chronic phase. Natural killer (NK) and NKT cells play an important role in the immune control of T. cruzi infection, mainly by releasing the cytokine IFN-γ that activates the microbicidal action of macrophages and other cells and shapes a protective type 1 immune response...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27890301/thrombolytic-therapy-associated-acute-myocardial-infarction-in-patients-with-acute-ischemic-stroke-a-treatment-dilemma
#12
Chih-Jen Yang, Po-Chuan Chen, Chin-Sheng Lin, Chia-Lin Tsai, Shih-Hung Tsai
Acute myocardial infarction (AMI) is uncommon in the acute phase of acute ischemic stroke (AIS) and occurs in approximately 1% of the population. Here, we report a paradoxical case of AMI during tissue plasminogen activator (t-PA) infusion for AIS. We review and analyze the previously reported cases. We found that only patients with AMI which occurred after thrombolytic therapy for AIS who received an adequate combination of anticoagulation plus percutaneous coronary intervention survived their events. Several mechanisms have been proposed for the development of AMI after thrombolytic therapy...
November 22, 2016: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27889194/usefulness-of-thromboelastography-in-the-detection-and-management-of-tissue-plasminogen-activator-associated-hyperfibrinolysis
#13
Francesca Rosafio, Laura Vandelli, Guido Bigliardi, Francesco Cavallieri, Maria Luisa Dell'Acqua, Livio Picchetto, Andrea Zini
Rotation thromboelastometry is a viscoelastometric method that provides a rapid assessment of a patient's hemostatic processes in emergency settings, allowing prompt identification of specific coagulation abnormalities. Its results thus might guide targeted replacement therapy in hemorrhagic conditions, in case of platelet or coagulation factor deficiency, or hyperfibrinolysis, which is difficult to identify otherwise. Although currently used in emergency and traumatic surgery, there are limited data about thromboelastometry in ischemic stroke, particularly in monitoring the coagulative response to recombinant tissue plasminogen activator after intravenous thrombolysis (IVT)...
November 23, 2016: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/27887792/edaravone-with-and-without-6%C3%A2-mg-kg-alteplase-within-4-5-hours-after-ischemic-stroke-a-prospective-cohort-study-protect4-5
#14
Takenori Yamaguchi, Hideto Awano, Hiroaki Matsuda, Norio Tanahashi
BACKGROUND: Edaravone is widely used to treat acute ischemic stroke (AIS) within 24 hours of onset. We aimed to evaluate current edaravone treatment practices and the efficacy and safety of edaravone used with recombinant tissue plasminogen activator (tPA) in AIS patients within 4.5 hours of onset. The results were compared with those of the Safe Implementation of Treatments in Stroke-International Stroke Thrombolysis Registry (SITS-ISTR) study. METHODS: PROTECT4...
November 22, 2016: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/27886531/coagulation-and-sepsis
#15
REVIEW
Marcel Levi, Tom van der Poll
Severe sepsis is almost invariably associated with systemic activation of coagulation. There is ample evidence that demonstrates a wide-ranging cross-talk between hemostasis and inflammation, which is probably implicated in the pathogenesis of organ dysfunction in patients with sepsis. Inflammation not only leads to initiation and propagation of coagulation activity, but coagulation also markedly influences inflammation. Molecular mechanisms that play a role in inflammation-induced effects on coagulation have been recognized in much detail...
November 19, 2016: Thrombosis Research
https://www.readbyqxmd.com/read/27884590/physical-activity-induced-protection-against-breast-cancer-risk-associated-with-delayed-parity
#16
Kathleen M Sturgeon, Aaron Schweitzer, John J Leonard, Deirdre K Tobias, Ying Liu, Elizabeth Cespedes Feliciano, Vasanti S Malik, Amit Joshi, Bernard Rosner, Bart C De Jonghe
Epidemiological evidence indicates that physical activity between menarche and first pregnancy is associated with a lower risk of breast cancer among women with at least 20years between these reproductive events. The mechanism by which physical activity during this interval confers protection is unknown. This study used a novel animal model to assess potentially protective effects of physical activity on tumor development in delayed parity. Thirty-six female Sprague Dawley rats received an i.p. injection of 50mg/kg N-methyl-N-nitrosourea (MNU) at 5weeks of age...
November 21, 2016: Physiology & Behavior
https://www.readbyqxmd.com/read/27881952/tissue-type-plasminogen-activator-tpa-modulates-the-postsynaptic-response-of-cerebral-cortical-neurons-to-the-presynaptic-release-of-glutamate
#17
Valerie Jeanneret, Fang Wu, Paola Merino, Enrique Torre, Ariel Diaz, Lihong Cheng, Manuel Yepes
Tissue-type plasminogen activator (tPA) is a serine proteinase released by the presynaptic terminal of cerebral cortical neurons following membrane depolarization (Echeverry et al., 2010). Recent studies indicate that the release of tPA triggers the synaptic vesicle cycle and promotes the exocytosis (Wu et al., 2015) and endocytic retrieval (Yepes et al., 2016) of glutamate-containing synaptic vesicles. Here we used electron microscopy, proteomics, quantitative phosphoproteomics, biochemical analyses with extracts of the postsynaptic density (PSD), and an animal model of cerebral ischemia with mice overexpressing neuronal tPA to study whether the presynaptic release of tPA also has an effect on the postsynaptic terminal...
2016: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/27881907/retinal-safety-of-intravitreal-rtpa-in-healthy-rats-and-under-excitotoxic-conditions
#18
Alejandra Daruich, Jérôme Parcq, Kimberley Delaunay, Marie-Christine Naud, Quentin Le Rouzic, Emilie Picard, Patricia Crisanti, Denis Vivien, Marianne Berdugo, Francine Behar-Cohen
PURPOSE: Intravitreal recombinant tissue plasminogen activator (rtPA) is used off-label for the surgical management of submacular hemorrhage, a severe complication of neovascular age-related macular degeneration. rtPA is approved for coronary and cerebral thrombolysis. However, in ischemic stroke rtPA is known to increase excitotoxic neural cell death by interacting with the N-methyl-D-aspartate (NMDA) receptor. We therefore investigated the retinal toxicity of rtPA in healthy rats and in a model of NMDA-induced retinal excitotoxicity...
2016: Molecular Vision
https://www.readbyqxmd.com/read/27879449/ethnic-comparison-of-clinical-characteristics-and-ischemic-stroke-subtypes-among-young-adult-patients-with-stroke-in-hawaii
#19
Kazuma Nakagawa, Cherisse S Ito, Sage L King
BACKGROUND AND PURPOSE: Native Hawaiians and other Pacific Islanders (NHOPI) with ischemic stroke have younger age of stroke onset compared with whites. However, ethnic differences in stroke subtypes in this population have been inadequately studied. METHODS: Consecutive young adult patients (aged ≤55 years) who were hospitalized for ischemic stroke between 2006 and 2012 at a tertiary center in Honolulu were studied. Clinical characteristics and stroke subtypes based on pathophysiological TOAST classification (Trial of Org 10172) of NHOPI and Asians were compared with whites...
November 22, 2016: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/27879445/agreement-among-stroke-faculty-and-fellows-in-treating-ischemic-stroke-patients-with-tissue-type-plasminogen-activator-and-thrombectomy
#20
Ahmad-Riad Ramadan, Mary Carter Denny, Farhaan Vahidy, Jose-Miguel Yamal, Tzu-Ching Wu, Amrou Sarraj, Sean Savitz, James Grotta
BACKGROUND AND PURPOSE: The aim of this study is to determine agreement among vascular neurology fellows and faculty in treating patients with acute ischemic stroke with intravenous tissue-type plasminogen activator and intra-arterial thrombectomy (IAT). METHODS: Patients were evaluated simultaneously by at least 2 vascular neurology. Agreement was determined using kappa (κ) and intraclass correlation coefficients. RESULTS: In 60 patients, agreement was substantial for tissue-type plasminogen activator (κ=0...
November 22, 2016: Stroke; a Journal of Cerebral Circulation
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