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https://www.readbyqxmd.com/read/28437857/influence-of-inflammation-and-nitric-oxide-upon-platelet-aggregation-following-deposition-of-diesel-exhaust-particles-in-the-airways
#1
E Smyth, A Solomon, M A Birrell, M J Smallwood, P G Winyard, T D Tetley, M Emerson
BACKGROUND AND PURPOSE: Exposure to nanoparticulate pollution has been implicated in platelet-driven thrombotic events such as myocardial infarction. Inflammation and impairment of nitric oxide (NO) bioavailability have been proposed as potential causative mechanisms. It is unclear, however, whether airways exposure to combustion-derived nanoparticles such as diesel exhaust particles (DEP) or carbon black (CB) can augment platelet aggregation in vivo and the underlying mechanisms remain undefined...
April 24, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28437748/rational-and-timely-haemostatic-interventions-following-cardiac-surgery-coagulation-factor-concentrates-or-blood-bank-products
#2
Mariann Tang, Christian Fenger-Eriksen, Per Wierup, Jacob Greisen, Jørgen Ingerslev, Vibeke Hjortdal, Benny Sørensen
BACKGROUND: Cardiac surgery may cause a serious coagulopathy leading to increased risk of bleeding and transfusion demands. Blood bank products are commonly first line haemostatic intervention, but has been associated with hazardous side effect. Coagulation factor concentrates may be a more efficient, predictable, and potentially a safer treatment, although prospective clinical trials are needed to further explore these hypotheses. This study investigated the haemostatic potential of ex vivo supplementation of coagulation factor concentrates versus blood bank products on blood samples drawn from patients undergoing cardiac surgery...
April 5, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28437586/pathogenesis-of-vascular-leak-in-dengue-virus-infection
#3
REVIEW
Gathsaurie Neelika Malavige, Graham S Ogg
Endothelial dysfunction leading to vascular leak is the hallmark of severe dengue. Vascular leak typically becomes clinically evident during 3-6 days since the onset of illness, which is known as the critical phase. This critical phase follows the period of peak viraemia, and lasts for 24 to 48 hours and usually shows rapid and complete reversal, suggesting it is likely to occur as a result of inflammatory mediators, rather than infection of the endothelium. Cytokines such as TNFα, which are known to be elevated in the critical phase of dengue, are likely to be contributing factors...
April 24, 2017: Immunology
https://www.readbyqxmd.com/read/28437133/the-impact-of-the-centrifuge-characteristics-and-centrifugation-protocols-on-the-cells-growth-factors-and-fibrin-architecture-of-a-leukocyte-and-platelet-rich-fibrin-l-prf-clot-and-membrane
#4
David M Dohan Ehrenfest, Nelson R Pinto, Andrea Pereda, Paula Jiménez, Marco Del Corso, Byung-Soo Kang, Mauricio Nally, Nicole Lanata, Hom-Lay Wang, Marc Quirynen
L-PRF (leukocyte- and platelet-rich fibrin) is one of the four families of platelet concentrates for surgical use and is widely used in oral and maxillofacial regenerative therapies. The first objective of this article was to evaluate the mechanical vibrations appearing during centrifugation in four models of commercially available table-top centrifuges used to produce L-PRF and the impact of the centrifuge characteristics on the cell and fibrin architecture of a L-PRF clot and membrane. The second objective of this article was to evaluate how changing some parameters of the L-PRF protocol may influence its biological signature, independently from the characteristics of the centrifuge...
April 24, 2017: Platelets
https://www.readbyqxmd.com/read/28436749/differential-diagnosis-of-neonatal-alloimmune-thrombocytopenia-type-2b-von-willebrand-disease
#5
Mathilde Penel-Page, Sandrine Meunier, Mathilde Fretigny, Sandra Le Quellec, Pierre Boisseau, Christine Vinciguerra, Catherine Ternisien, Lucia Rugeri
At birth, severe thrombocytopenia without context of infection should mainly suggest neonatal alloimmune thrombocytopenia (NAIT), especially in case of a platelet count below 20 GL(-1). We report two cases of severe neonatal thrombocytopenia, first suspected as being NAIT. Both had a platelet count below 20 GL(-1) with platelet clumps. The absence of alloantibodies and failure of platelet transfusion and intravenous immunoglobulins to improve the platelet count led to question the diagnosis and to evoke inherited bleeding disorders...
April 24, 2017: Platelets
https://www.readbyqxmd.com/read/28436697/liver-track-embolization-after-islet-cell-transplant-comparison-of-two-techniques
#6
Ron C Gaba, Kenji R Kobayashi, James T Bui, R Peter Lokken, Andrew J Lipnik, Charles E Ray, Jose Oberholzer
OBJECTIVE: The purpose of this study was to compare the efficacy and safety of microfibrillar collagen paste with those of gelatin sponge for liver track embolization after islet cell transplants. MATERIALS AND METHODS: In a single-institution, retrospective study, 37 patients underwent 66 islet cell transplants from January 2005 through October 2015. Transplants were performed with 6-French transhepatic access, systemic anticoagulation, pretransplant and posttransplant portal venous pressure measurement, and image-guided liver track embolization with gelatin sponge (2005-2011) or microfibrillar collagen paste (2012-2015)...
May 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28436273/proteome-analysis-of-sheep-b-lymphocytes-in-the-course-of-bovine-leukemia-virus-induced-leukemia
#7
Michal Reichert
Presented are the results of a study of the expression pattern of different proteins in the course of bovine leukemia virus-induced leukemia in experimental sheep and I discuss how the obtained data may be useful in gaining a better understanding of the pathogenesis of the disease, diagnosis, and for the selection of possible therapeutic targets. In cattle, the disease is characterized by life-long persistent lymphocytosis leading to leukemia/lymphoma in about 5% of infected animals. In sheep, as opposed to cattle, the course of the disease is always fatal and clinical symptoms usually occur within a three-year period after infection...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28436258/thrombopoietin-and-platelet-aggregation-in-patients-with-stable-coronary-artery-disease
#8
Sanne Bøjet Larsen, Erik Lerkevang Grove, Søs Neergaard-Petersen, Morten Würtz, Anne-Mette Hvas, Steen Dalby Kristensen
Thrombopoietin (TPO) may facilitate platelet activation and aggregation. However, data on the impact of TPO on platelet aggregation in patients with stable coronary artery disease (CAD) are scarce. We aimed to investigate associations between TPO and platelet aggregation and activation in patients with stable coronary artery disease (CAD). We studied 900 stable CAD patients. Serum TPO was assessed by ELISA. Platelet aggregation was evaluated using the Multiplate Analyzer (agonists: arachidonic acid [AA] and collagen) and the VerifyNow Aspirin Assay...
April 24, 2017: Platelets
https://www.readbyqxmd.com/read/28436251/sirolimus-coating-on-heparinized-stents-prevents-restenosis-and-thrombosis
#9
In-Ho Bae, Kyung Seob Lim, Dae Sung Park, Jae-Won Shim, So-Youn Lee, Eun-Jae Jang, Jun-Kyu Park, Ju-Han Kim, Myung Ho Jeong
The aim of this study was to evaluate the inhibitory effect of sirolimus coating on the occurrence of restenosis and thrombosis with heparinized stents. Heparin and dopamine were conjugated by chemical bonding and anchored on the stent surface by a mussel-inspired adhesion mechanism. Subsequently, sirolimus was coated with poly lactic-glycolic acid on the heparinized stent surface. The heparin was well attached to the surface, and the surface was smooth after sirolimus coating. The smoothness of the surface was maintained after expansion of the stent...
January 1, 2017: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/28436074/an-evaluation-of-the-mixed-pediatric-unit-for-blood-loss-replacement-in-pediatric-craniofacial-surgery
#10
Stefan Mogensen, Norbert Lubenow, Pelle Nilsson, Henrik Engquist, Folke Knutsson, Per Enblad, Daniel Nowinski, Peter Frykholm
BACKGROUND: Surgical correction for craniosynostosis is often associated with significant perioperative hemorrhage. We implemented a transfusion strategy with a strict protocol including transfusion triggers, frequent assessment of coagulation tests, and the use of a novel transfusion unit, the mixed pediatric unit. AIM: The aim of the study was to evaluate if the applied transfusion strategy could reduce total blood loss and number of blood donors. METHODS: Children <1 year old admitted for craniosynostosis surgery were included for the study...
April 23, 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/28435982/-changes-in-biological-functions-of-high-density-lipoprotein-after-abnormal-modification
#11
Hang Qu, Yang Yu, Shu-Cun Qin, Guo-Hua Song
High-density lipoprotein (HDL) is composed of apolipoproteins, lipids and functional proteins. HDL protects against atherosclerosis (AS) by reverse cholesterol transport (RCT). HDL inhibits the lipid oxidation, inflammation and restores endothelial function. During systemic inflammation or metabolic disorders, HDL can be modified abnormally and converted to a dysfunctional type, which results in the loss of anti-inflammatory factors including apolipoprotein A-I (apoA-I), paraoxonase (PON) and platelet activating factor acetylhydrolase (PAF-AH), and gains of pro-inflammatory factors such as serum amyloid A (SAA), triglyceride (TG) and oxidative lipid...
April 25, 2017: Sheng Li Xue Bao: [Acta Physiologica Sinica]
https://www.readbyqxmd.com/read/28435890/gene-expression-profile-of-human-cytokines-in-response-to-burkholderia-pseudomallei-infection
#12
Shivankari Krishnananthasivam, Harindra Darshana Sathkumara, Enoka Corea, Mohan Natesan, Aruna Dharshan De Silva
Melioidosis is an underreported infectious disease, caused by the Gram-negative bacterium Burkholderia pseudomallei. Understanding the disease susceptibility and pathogenesis is crucial for developing newer diagnostic and therapeutic strategies for this life-threatening infection. In this study, we aimed to analyze the gene expression levels of important cytokines in melioidosis patients and establish useful correlates with disease biomarkers compared to cases of sepsis infection caused by other pathogens and healthy individuals...
March 2017: MSphere
https://www.readbyqxmd.com/read/28435674/the-three-rs-recruitment-retention-and-residence-of-leukocytes-in-the-liver
#13
REVIEW
Hayley A McNamara, Ian A Cockburn
The composition of leukocytes in the liver is highly distinct from that of the blood and lymphoid organs. In particular, the liver is highly enriched in non-conventional T cells such as natural killer T (NKT) cells, γδ T cells and mucosal-associated invariant T cells. In addition, there are significant populations of tissue-resident NK cells (or innate lymphoid cells (ILC1)) and memory CD8(+) T cells. These cells are joined in conditions of inflammation by neutrophils, monocytes and macrophages. In recent years a multitude of studies have generated insights into how these cells arrest, move and remain resident in the liver...
December 2016: Clinical & Translational Immunology
https://www.readbyqxmd.com/read/28435653/paroxysmal-nocturnal-hemoglobinuria-in-the-differential-diagnosis-of-thrombocytopenia
#14
Fusun Gediz, Bahriye Kadriye Payzin, Ozlem Zekiye Cakmak, Yusuf Uzum, Damla Ernur, Fahri Sahin
Paroxysmal nocturnal hemoglobinuria (PNH) is a disease which diagnosis may be delayed due to variable clinical findings. We describe herein a case of PNH in a 21 year old woman who admitted with complaints of chronic weakness, intermittent spontaneous ecchymoses, and an intermittent abdominal pain. On laboratory tests thrombocytopenia and iron deficiency anemia without any clinical findings were found. Flow cytometric evaluations showed a PNH clone of 15% for erythrocytes, 64% for monocytes, and 60% for granulocytes...
February 23, 2017: Hematology Reports
https://www.readbyqxmd.com/read/28435559/intra-articular-hyaluronic-acid-ha-and-platelet-rich-plasma-prp-injection-versus-hyaluronic-acid-ha-injection-alone-in-patients-with-grade-iii-and-iv-knee-osteoarthritis-oa-a-retrospective-study-on-functional-outcome
#15
C Saturveithan, G Premganesh, S Fakhrizzaki, M Mahathir, K Karuna, K Rauf, H William, H Akmal, N Sivapathasundaram, K Jaspreet
Introduction: Intra-articular hyaluronic acid (HA) is widely utilized in the treatment of knee osteoarthritis whereas platelet rich plasma (PRP) enhances the regeneration of articular cartilage. This study analyses the efficacy of HA and PRP in grade III and IV knee osteoarthritis. Methodology: This is a cross sectional study with retrospective review of 64 patients (101 knees) which includes 56 knees injected with HA+ PRP, and 45 knees with HA only. Results: During the post six months International Knee Documentation Committee (IKDC) evaluation, HA+PRP group showed marked improvement of 24...
July 2016: Malaysian Orthopaedic Journal
https://www.readbyqxmd.com/read/28435517/inhibition-of-the-platelet-derived-growth-factor-receptor-beta-pdgfrb-using-gene-silencing-crenolanib-besylate-or-imatinib-mesylate-hampers-the-malignant-phenotype-of-mesothelioma-cell-lines
#16
Ombretta Melaiu, Calogerina Catalano, Chiara De Santi, Monica Cipollini, Gisella Figlioli, Lucia Pellè, Elisa Barone, Monica Evangelista, Alice Guazzelli, Laura Boldrini, Elisa Sensi, Alessandra Bonotti, Rudy Foddis, Alfonso Cristaudo, Luciano Mutti, Gabriella Fontanini, Federica Gemignani, Stefano Landi
Malignant pleural mesothelioma (MPM) is a cancer of the pleural cavity resistant to chemotherapy. The identification of novel therapeutic targets is needed to improve its poor prognosis. Following a review of literature and a screening of specimens we found that platelet-derived growth factor receptor beta (PDGFRB) is over-expressed, but not somatically mutated, in MPM tissues. We aimed to ascertain whether PDGFRB is a MPM-cancer driver gene. The approaches employed included the use of gene silencing and the administration of small molecules, such as crenolanib and imatinib (PDGFR inhibitors) on MPM cell lines (IstMes2, Mero-14, Mero-25)...
January 2017: Genes & Cancer
https://www.readbyqxmd.com/read/28435448/inhibition-of-platelet-function-using-liposomal-nanoparticles-blocks-tumor-metastasis
#17
Yinlong Zhang, Jingyan Wei, Shaoli Liu, Jing Wang, Xuexiang Han, Hao Qin, Jiayan Lang, Keman Cheng, Yiye Li, Yingqiu Qi, Greg J Anderson, Saraswati Sukumar, Suping Li, Guangjun Nie
Extensive evidence has shown that platelets support tumor metastatic progression by inducing epithelial-mesenchymal transition of cancer cells and by shielding circulating tumor cells from immune-mediated elimination. Therefore, blocking platelet function represents a potential new avenue for therapy focused on eliminating metastasis. Here we show that liposomal nanoparticles bearing the tumor-homing pentapeptide CREKA (Cys-Arg-Glu-Lys-Ala) can deliver a platelet inhibitor, ticagrelor, into tumor tissues to specifically inhibit tumor-associated platelets...
2017: Theranostics
https://www.readbyqxmd.com/read/28435447/a-unique-recombinant-fluoroprobe-targeting-activated-platelets-allows-in-vivo-detection-of-arterial-thrombosis-and-pulmonary-embolism-using-a-novel-three-dimensional-fluorescence-emission-computed-tomography-flect-technology
#18
Bock Lim, Yu Yao, Alex Lin-I Huang, May Lin Yap, Ulrike Flierl, Jathushan Palasubramaniam, Maria T K Zaldivia, Xiaowei Wang, Karlheinz Peter
Progress in pharmaceutical development is highly-dependent on preclinical in vivo animal studies. Small animal imaging is invaluable for the identification of new disease markers and the evaluation of drug efficacy. Here, we report for the first time the use of a three-dimensional fluorescence bioimager called FLuorescence Emission Computed Tomography (FLECT) for the detection of a novel recombinant fluoroprobe that is safe, easily prepared on a large scale and stably stored prior to scan. This novel fluoroprobe (Targ-Cy7) comprises a single-chain antibody-fragment (scFvTarg), which binds exclusively to activated-platelets, conjugated to a near-infrared (NIR) dye, Cy7, for detection...
2017: Theranostics
https://www.readbyqxmd.com/read/28435309/recognition-and-management-of-platelet-refractory-bleeding-in-patients-with-glanzmann-s-thrombasthenia-and-other-severe-platelet-function-disorders
#19
Meera Chitlur, Madhvi Rajpurkar, Michael Recht, Michael D Tarantino, Donald L Yee, David L Cooper, Sriya Gunawardena
Patients with rare qualitative platelet disorders or platelet function disorders (PFDs) may present to the hospital physician with severe bleeding episodes or excessive surgical bleeding. Although standard treatment consists of platelet transfusions, repeated transfusions may result in the development of antiplatelet antibodies (APA) or clinical refractoriness, rendering further platelet therapy ineffective. In such settings, an approved treatment option for patients with Glanzmann's thrombasthenia (GT), one of the well-known rare PFDs, is recombinant activated coagulation factor VII (rFVIIa)...
2017: International Journal of General Medicine
https://www.readbyqxmd.com/read/28435267/the-acute-pulmonary-and-thrombotic-effects-of-cerium-oxide-nanoparticles-after-intratracheal-instillation-in-mice
#20
Abderrahim Nemmar, Suhail Al-Salam, Sumaya Beegam, Priya Yuvaraju, Badreldin H Ali
Cerium oxide nanoparticles (CeO2 NPs), used as a diesel fuel catalyst, can be emitted into the ambient air, resulting in exposure to humans by inhalation. Recent studies have reported the development of lung toxicity after pulmonary exposure to CeO2 NPs. However, little is known about the possible thrombotic effects of these NPs. The present study investigated the acute (24 hours) effect of intratracheal (IT) instillation of either CeO2 NPs (0.1 or 0.5 mg/kg) or saline (control) on pulmonary and systemic inflammation and oxidative stress and thrombosis in mice...
2017: International Journal of Nanomedicine
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