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Platelet mapping

John S Kim, Jon Kaufman, Sonali S Patel, Marilyn Manco-Johnson, Jorge Di Paola, Eduardo M da Cruz
BACKGROUND: Ketorolac is used for pediatric analgesia after surgery despite its known platelet inhibition via the arachidonic acid (AA) pathway. The degree of platelet inhibitory effect after cardiac surgery is not well characterized. Thromboelastography with platelet mapping (TEG-PM) is emerging as a frequently used test to evaluate platelet inhibition via the AA pathway. METHODS: Post hoc analysis of a data set collected in a prospective observational cohort study evaluating platelet inhibition in children after congenital heart surgery with cardiopulmonary bypass (CPB)...
November 2018: World Journal for Pediatric & Congenital Heart Surgery
Ruixia Song, Chenming Dong, Cuiting Wang, Hong Zhang, Zhaohui Yang
OBJECTIVE: To systematical evaluate the effect of Xuebijing injection in the treatment of multiple organ dysfunction syndrome (MODS). METHODS: With the keywords including Xuebijing, multiple organ dysfunction syndrome, multiple organ dysfunction and multiple organ failure, PubMed, the Cochrane Library, Embase, China National Knowledge Infrastructure (CNKI), China Biology Medicine (CBM), VIP and Wanfang Data from the database start until March 4th, 2018 were searched for relevant randomized controlled trials (RCTs) related to Xuebijing injection combined conventional treatment versus conventional treatment alone for MODS...
September 2018: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
Aaron Seo, Suleyman Gulsuner, Sarah Pierce, Miri Ben-Harosh, Hanna Shalev, Tom Walsh, Tanya Krasnov, Orly Dgany, Sergei Doulatov, Hannah Tamary, Akiko Shimamura, Mary-Claire King
Severe thrombocytopenia, characterized by dysplastic megakaryocytes and intracranial bleeding, was diagnosed in six individuals from a consanguineous kindred. Three of the individuals were successfully treated by bone marrow transplant. Whole exome sequencing and homozygosity mapping of multiple family members, coupled with whole genome sequencing to reveal shared non-coding variants, revealed one potentially functional variant segregating with thrombocytopenia under a recessive model: GALE p.R51W (c.C151T, NM_001127621)...
September 20, 2018: Human Molecular Genetics
Lindsay J May, Angela Lorts, Christina VanderPluym, Jennifer Conway, M Patricia Massicotte, Morgan M Millar, Marie E Steiner, David N Rosenthal
Management of antithrombotic therapy (ATT) for pediatric ventricular assist devices is challenging, and the Berlin EXCOR remains the only FDA-approved option. Among those on the EXCOR, 28% have neurologic complications and major bleeding occurs in 50%. The Edmonton Protocol was developed to guide ATT, but the adverse event rate remains high, leading most centers to make modifications. The objective of this study is to characterize antithrombotic practice variation among North American pediatric ventricular assist device programs, in order to guide future research...
September 12, 2018: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
Kodai Uematsu, Yukiko Enomoto, Takashi Onuma, Masanori Tsujimoto, Tomoaki Doi, Rie Matsushima-Nishiwaki, Haruhiko Tokuda, Shinji Ogura, Hiroki Iida, Osamu Kozawa, Toru Iwama
BACKGROUND/AIMS: Thrombin induces the activation of human platelets through protease-activated receptor (PAR) 1 and PAR4, and Rac, a member of the Rho family of small GTPases, is implicated in PAR activation. We previously reported that phosphorylated-heat shock protein 27 (HSP27) is released from the thrombin receptor-activating peptide (TRAP)-stimulated platelets of diabetic patients. In the present study, we investigated the role of Rac in the TRAP-elicited release of phosphorylated-HSP27 from human platelets...
2018: Cellular Physiology and Biochemistry
Chomaw Sitotaw, Fikir Asrie, Mulugeta Melku
OBJECTIVE: To evaluate platelet and White cell parameters in women with preeclampsia (PE) in comparison with a healthy pregnancy. METHODS: A cross-sectional study was carried in 2015 at University of Gondar hospital. Thirty-three mild PE, 30 severe PE cases and 63 healthy pregnant women were enrolled in the study. About 3 mL venous blood sample was collected from each study participants. Hematological parameters were determined by Sysmex KX-21 hematological analyzer...
July 2018: Pregnancy Hypertension
Shane A Shapiro, Jennifer R Arthurs, Michael G Heckman, Joseph M Bestic, Shari E Kazmerchak, Nancy N Diehl, Abba C Zubair, Mary I O'Connor
Objective Bone marrow aspiration and concentration (BMAC) is becoming a more common regenerative therapy for musculoskeletal pathology. In our current pilot study, we studied patients with mild-to-moderate bilateral knee osteoarthritis, compared pain at 12-month follow-up between BMAC-injected and saline-injected knees, and examined cartilage appearance measured by magnetic resonance imaging (MRI) T2 quantitative mapping. Design Twenty-five patients with mild-to-moderate bilateral osteoarthritic knee pain were randomized to receive BMAC into one knee and saline placebo into the other...
August 30, 2018: Cartilage
Sante E I Carone, Danilo L Menaldo, Marco A Sartim, Carolina P Bernardes, Renato C Caetano, Ronivaldo R da Silva, Hamilton Cabral, Benedito Barraviera, Rui S Ferreira Junior, Suely V Sampaio
Snake venom serine proteases (SVSPs) are commonly described as capable of affecting hemostasis by interacting with several coagulation system components. In this study, we describe the isolation and characterization of BjSP from Bothrops jararaca snake venom, a serine protease with distinctive properties. This enzyme was isolated by three consecutive chromatographic steps and showed acidic character (pI 4.4), molecular mass of 28 kDa and N-carbohydrate content around 10%. Its partial amino acid sequence presented 100% identity to a serine protease cDNA clone previously identified from B...
August 24, 2018: Toxicology and Applied Pharmacology
Michael Caspers, Nadine Schäfer, Matthias Fröhlich, Ursula Bauerfeind, Bertil Bouillon, Manuel Mutschler, Marc Maegele
BACKGROUND: External factors following trauma and iatrogenic intervention influence blood coagulation and particularly clot formation. In particular, three external factors (in detail dilution via uncritical volume replacement, acidosis and hypothermia), in combination, referred to as the "lethal triad", substantially aggravate the hypocoagulative state after trauma. Contribution of these external factors to the resulting hypocoagulative state in trauma and especially their influence on primary haemostasis has still not been investigated systematically...
August 15, 2018: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
Hong Li, Manuel Zeitelhofer, Ingrid Nilsson, Xicong Liu, Laura Allan, Benjamin Gloria, Angelo Perani, Carmel Murone, Bruno Catimel, A Munro Neville, Fiona E Scott, Andrew M Scott, Ulf Eriksson
PDGF-CC is a member of the platelet-derived growth factor (PDGF) family that stimulates PDGFRα phosphorylation and thereby activates intracellular signalling events essential for development but also in cancer, fibrosis and neuropathologies involving blood-brain barrier (BBB) disruption. In order to elucidate the biological and pathological role(s) of PDGF-CC signalling, we have generated high affinity neutralizing monoclonal antibodies (mAbs) recognizing human PDGF-CC. We determined the complementarity determining regions (CDRs) of the selected clones, and mapped the binding epitope for clone 6B3...
2018: PloS One
Rachael Morris, Shauna-Kay Spencer, Allison Barnes, Teylor Bowles, Patrick B Kyle, Kedra Wallace
HELLP (hemolysis elevated liver enzyme low platelet) syndrome is associated with hypertension, inflammation, oxidative stress and endothelial activation. The objective of this study was to determine if oxygen scavenging or endothelin A receptor antagonism improved hypertension and oxidative stress. sFlt-1 and sEndoglin were infused via mini-osmotic pump into normal pregnant rats (NP) on gestational day 12 to create HELLP syndrome. On gestational day 18 arterial catheters were inserted and on gestational day 19 mean arterial pressure was analyzed in rats; serum, urine and tissues were collected for molecular analysis...
September 5, 2018: European Journal of Pharmacology
Shinji Yamada, Shunsuke Itai, Mika K Kaneko, Satoru Konnai, Yukinari Kato
Mouse podoplanin (mPDPN) is a type I transmembrane sialoglycoprotein, which is expressed on lymphatic endothelial cells, podocytes of the kidney, and type I alveolar cells of the lung. mPDPN is known as a platelet aggregation-inducing factor and possesses four platelet aggregation-stimulating (PLAG) domains: PLAG1, PLAG2, and PLAG3 in the N-terminus and PLAG4 in the middle of the mPDPN protein. mPDPN overexpression in cancers has been reportedly associated with hematogenous metastasis through interaction with the C-type lectin-like receptor 2 of platelets...
September 2018: Biochemistry and Biophysics Reports
Helena Lam, Nakul Katyal, Catherine Parker, Prashant Natteru, Premkumar Nattanamai, Christopher R Newey, Chadd K Kraus
Thromboelastography with platelet mapping (TEG-PM) is a modality to measure platelet function, especially in patients taking antiplatelet medications. It consists of two components: arachidonic acid (AA), which is sensitive to aspirin, and adenosine diphosphate (ADP), which is sensitive to clopidogrel. In patients with spontaneous intracerebral hemorrhages (sICH), the clinical interpretation of platelet mapping is unclear. The objective of this study was to evaluate TEG-PM in patients with sICH on aspirin and/or clopidogrel who receive platelet transfusions...
April 22, 2018: Curēus
Anika Witten, Juliane Bolbrinker, Andrei Barysenka, Matthias Huber, Frank Rühle, Ulrike Nowak-Göttl, Edeltraut Garbe, Reinhold Kreutz, Monika Stoll
Immune-mediated heparin-induced thrombocytopenia (HIT) is the clinically most important adverse drug reaction (ADR) in response to heparin therapy characterized by a prothrombotic state despite a decrease in platelet count. We conducted a genome-wide association study in 96 suspected HIT cases and 96 controls to explore the genetic predisposition for HIT within a case-control pharmacovigilance study followed by replication in additional 86 cases and 86 controls from the same study. One single nucleotide polymorphism (SNP, rs1433265, P = 6...
June 22, 2018: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
Junhui Li, Xiaohua Sheng, Dongsheng Cheng, Feng Wang, Guihua Jian, Yongguang Li, Tao Xu, Xiaoxia Wang, Ying Fan, Niansong Wang
A high mean platelet volume (MPV) level has been demonstrated to predict poor clinical outcomes in patients with cardiovascular disease. However, the relationship between MPV and mortality in patients with acute cardiorenal syndrome (ACRS) is unknown. Therefore, we investigated the predictive value of MPV for in-hospital mortality of patients with ACRS who received continuous renal replacement therapy (CRRT) in this study.We retrospectively analyzed the demographics, etiology, severity of illness, prognosis, and risk factors of ACRS patients who underwent CRRT in our hospital from January 2009 to December 2014...
June 2018: Medicine (Baltimore)
Aly Shamseddin, Céline Crauste, Erwan Durand, Pierre Villeneuve, Grégor Dubois, Teresa Pavlickova, Thiery Durand, Joseph Vercauteren, Francisco Veas
Gelatinolytic matrix metalloproteinases (MMP-2, -9) play a critical role not only in mammals physiology but also during inflammation and healing processes. The natural stilbenoid, resveratrol (RES), exhibits potent antioxidant effects, in a hormetic mode of action, and is known to inhibit MMP-9. However, RES administration exhibits major issues, including poor bioavailability and water solubility, hampering its potential therapeutic effect in vivo In the present study, we synthesized and evaluated five novel RES-lipid conjugates to increase their cell membrane penetration and improve their bioavailability...
August 31, 2018: Bioscience Reports
Palash K Dutta, Yun Zhang, Aaron T Blanchard, Chenghao Ge, Muaz Rushdi, Kristin Weiss, Cheng Zhu, Yonggang Ke, Khalid Salaita
Mechanical forces are central to most, if not all, biological processes, including cell development, immune recognition, and metastasis. Because the cellular machinery mediating mechano-sensing and force generation is dependent on the nanoscale organization and geometry of protein assemblies, a current need in the field is the development of force-sensing probes that can be customized at the nanometer-length scale. In this work, we describe a DNA origami tension sensor that maps the piconewton (pN) forces generated by living cells...
August 8, 2018: Nano Letters
Lucia Stefanini, Wolfgang Bergmeier
Platelets are highly specialized cells that continuously patrol the vasculature to ensure its integrity (hemostasis). At sites of vascular injury, they are able to respond to trace amounts of agonists and to rapidly transition from an anti-adhesive/patrolling to an adhesive state (integrin inside-out activation) required for hemostatic plug formation. Pathological conditions that disturb the balance in the underlying signaling processes can lead to unwanted platelet activation (thrombosis) or to an increased bleeding risk...
June 4, 2018: Platelets
Sally A Moody
The individual blastomeres of Xenopus two- to 32-cell embryos have been fate mapped. This work identified the precursors of most of the embryonic cell types, tissues and organs; however, the maps do not reveal the cell interactions or signaling pathways that are required for establishing cell fates. This protocol describes an explant culture approach for culturing blastomeres in isolation to test whether a cell's fate has been determined. Cleavage blastomeres can be cultured in a simple salt medium without added factors because they contain intracellular yolk platelets, which provide an intrinsic energy source...
May 16, 2018: Cold Spring Harbor Protocols
John Alfred Carr
BACKGROUND: Omega-3 fatty acids are widely used. This article reviews the coagulopathic effects of fish oil. METHODS: A review was performed of all English articles that addressed the topic from 1980 to 2017. RESULTS: Fish oil induces an in vitro coagulopathy in humans due to inhibitory effects in platelet-to-platelet adhesion and platelet-stimulated thrombin generation. The effect from fish oil alone is weak, but it is enhanced and may become clinically noticeable in patients taking antiplatelet therapy, and, to a lesser extent, in patients on factor Xa inhibitors and warfarin...
May 2018: Annals of Thoracic Surgery
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