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https://www.readbyqxmd.com/read/29457157/visible-light-curing-devices-irradiance-and-use-in-302-german-dental-offices
#1
Claus-Peter Ernst, Richard B Price, Angelika Callaway, Alissa Masek, Hendrik Schwarm, Inga Rullmann, Brita Willershausen, Vicky Ehlers
PURPOSE: To determine the irradiance delivered by visible-light curing (VLC) units and obtain information about the exposure times and the maintenance protocols used by dentists. MATERIALS AND METHODS: The irradiance (mW/cm2) delivered by 526 VLCs from 302 dental offices from the Rhine- Main area, Germany, was measured using an integrating sphere (IS) and a MARC patient simulator (M-PS); additional information was gathered using a survey. RESULTS: Irradiance was measured from 117 standard quartz-tungsten-halogen (QTH), 5 high-power QTH, 2 LED 1stgeneration, 333 LED 2nd-generation, 61 LED 3rd-generation, and 8 plasma-arc curing (PAC) units...
February 16, 2018: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/29450199/transfusion-transmitted-hepatitis-e-nat-screening-of-blood-donations-and-infectious-dose
#2
Jens Dreier, Cornelius Knabbe, Tanja Vollmer
The risk and importance of transfusion-transmitted hepatitis E virus (TT-HEV) infections by contaminated blood products is currently a controversial discussed topic in transfusion medicine. The infectious dose, in particular, remains an unknown quantity. In the present study, we illuminate and review this aspect seen from the viewpoint of a blood donation service with more than 2 years of experience in routine HEV blood donor screening. We systematically review the actual status of presently known cases of TT-HEV infections and available routine NAT-screening assays...
2018: Frontiers in Medicine
https://www.readbyqxmd.com/read/29449599/red-blood-cells-are-dynamic-reservoirs-of-cytokines
#3
Elisabeth Karsten, Edmond Breen, Benjamin R Herbert
Red blood cells (RBCs) have been shown to affect immune function and can induce inflammatory responses after transfusion. The transfusion of washed RBCs can significantly reduce adverse effects, however, the soluble factors that may mediate these effects have not been identified. Previous studies have identified, but not quantified, a small number of chemokines associated with RBCs. We isolated RBCs from healthy volunteers and quantified of a panel of 48 cytokines, chemokines, and growth factors in the lysate, cytosol, and conditioned media of these cells using Luminex ® technology...
February 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29447902/the-erythrocyte-osmotic-resistance-test-as-screening-tool-for-cholesterol-related-lysosomal-storage-diseases
#4
Laura López de Frutos, Jorge J Cebolla, Pilar Irún, Ralf Köhler, Pilar Giraldo
BACKGROUND: Erythrocyte volume regulation and membrane elasticity are essential for adaptation to osmotic and mechanical stress, and life span. Here, we evaluated whether defective cholesterol trafficking caused by the rare lysosomal storages diseases (LSDs), Niemann-Pick type C (NPC) and Lysosomal acid lipase (LAL) deficiency (LALD) impairs these properties. Moreover, we tested whether measurements of cholesterol membrane content and osmotic resistance serve as a screening test for these LSDs...
February 12, 2018: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/29430440/interaction-between-peri-operative-blood-transfusion-tidal-volume-airway-pressure-and-postoperative-ards-an-individual-patient-data-meta-analysis
#5
Ary Serpa Neto, Nicole P Juffermans, Sabrine N T Hemmes, Carmen S V Barbas, Martin Beiderlinden, Michelle Biehl, Ana Fernandez-Bustamante, Emmanuel Futier, Ognjen Gajic, Samir Jaber, Alf Kozian, Marc Licker, Wen-Qian Lin, Stavros G Memtsoudis, Dinis Reis Miranda, Pierre Moine, Domenico Paparella, Marco Ranieri, Federica Scavonetto, Thomas Schilling, Gabriele Selmo, Paolo Severgnini, Juraj Sprung, Sugantha Sundar, Daniel Talmor, Tanja Treschan, Carmen Unzueta, Toby N Weingarten, Esther K Wolthuis, Hermann Wrigge, Marcelo Gama de Abreu, Paolo Pelosi, Marcus J Schultz
Background: Transfusion of blood products and mechanical ventilation with injurious settings are considered risk factors for postoperative lung injury in surgical Patients. Methods: A systematic review and individual patient data meta-analysis was done to determine the independent effects of peri-operative transfusion of blood products, intra-operative tidal volume and airway pressure in adult patients undergoing mechanical ventilation for general surgery, as well as their interactions on the occurrence of postoperative acute respiratory distress syndrome (ARDS)...
January 2018: Annals of Translational Medicine
https://www.readbyqxmd.com/read/29421563/lipophilic-indocarbocyanine-conjugates-for-efficient-incorporation-of-enzymes-antibodies-and-small-molecules-into-biological-membranes
#6
Weston J Smith, Huy Tran, James I Griffin, Jessica Jones, Vivian P Vu, Lizanne Nilewski, Nathan Gianneschi, Dmitri Simberg
Decoration of cell membranes with biomolecules, targeting ligands and imaging agents is an emerging strategy to improve functionality of cell-based therapies. Compared to covalent chemistry or genetic expression on the cell surface, lipid painting (i.e., incorporation of lipid-conjugated molecules into the cell bilayer) is a fast, non-damaging and less expensive approach. Previous studies demonstrated excellent incorporation and retention of distearyl indocarbocyanine dye DiI in membranes of cells in vitro and in vivo...
February 2, 2018: Biomaterials
https://www.readbyqxmd.com/read/29415351/considerations-for-pre-transfusion-immunohaematology-testing-in-patients-receiving-the-anti-cd38-monoclonal-antibody-daratumumab-for-the-treatment-of-multiple-myeloma
#7
Hang Quach, Simon Benson, Helen Haysom, Anne-Marie Wilkes, Nicole Zacher, Merrole Cole-Sinclair, Henry Miles Prince, Peter Mollee, Andrew Spencer, Phoebe Joy Ho, Simon J Harrison, Cindy Lee, Bradley Augustson, James Daly
In recent years, the anti-CD38 monoclonal antibody daratumumab (Darzalex; Janssen-Cilag Pty Ltd) has been shown to be highly efficacious in relapsed and refractory multiple myeloma, with the final results of treatment in newly diagnosed patients awaited. Despite awareness of the potential interference of daratumumab in pre-transfusion immunohaematology testing during phase I and II clinical studies, there was a degree of unpreparedness in the community upon the introduction of this drug into the clinics, particularly the impact that it has on the operational processes in hospital transfusion laboratories and timely issue of red blood cells (RBCs)...
February 2018: Internal Medicine Journal
https://www.readbyqxmd.com/read/29410160/sensing-adhesion-forces-between-erythrocytes-and-%C3%AE-fibrinogen-modulating-fibrin-clot-architecture-and-function
#8
Ana Filipa Guedes, Filomena A Carvalho, Marco M Domingues, Fraser L Macrae, Helen R McPherson, Nuno C Santos, Robert A S Ariёns
Plasma fibrinogen includes an alternatively spliced γ-chain variant (γ'), which mainly exists as a heterodimer (γAγ') and has been associated with thrombosis. We tested γAγ' fibrinogen-red blood cells (RBCs) interaction using atomic force microscopy-based force spectroscopy, magnetic tweezers, fibrin clot permeability, scanning electron microscopy and laser scanning confocal microscopy. Data reveal higher work necessary for RBC-RBC detachment in the presence of γAγ' rather than γAγA fibrinogen. γAγ' fibrinogen-RBCs interaction is followed by changes in fibrin network structure, which forms an heterogeneous clot structure with areas of denser and highly branched fibrin fibers...
February 1, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29408596/clinical-and-immunological-profiles-of-anaemia-in-children-and-adolescents-with-plasmodium-vivax-malaria-in-the-par%C3%A3-state-brazilian-amazon
#9
Ana Maria Revoredo da Silva Ventura, Andrea Aparecida Moraes Fernandes, Graziela Maria Zanini, Lilian Rose Pratt-Riccio, Carina Guilhon Sequeira, Carlos Rodrigo Souza do Monte, Arnaldo Jorge Martins Filho, Ricardo Luiz Dantas Machado, Rosana Maria Feio Libonati, José Maria de Souza, Cláudio Tadeu Daniel-Ribeiro
Children and adolescents are at great risk for developing iron deficiency anaemia worldwide. In the tropical areas, malaria and intestinal parasites may also play an important role in anaemia pathogenesis. This study aimed at evaluating clinical and immunological aspects of anaemia in children and adolescents with Plasmodium vivax malaria, in the Pará State, Brazil. A longitudinal study was performed in two Reference Centres for malaria diagnosis in the Brazilian Amazon in children and adolescents with malaria (n = 81), as compared to a control group (n = 40)...
February 1, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29396366/quantitation-of-trans-fatty-acids-in-human-blood-via-isotope-dilution-gas-chromatography-negative-chemical-ionization-mass-spectrometry
#10
Heather C Kuiper, Na Wei, Samantha L McGunigale, Hubert W Vesper
Trans-fatty acids (TFA) are geometric isomers of naturally occurring cis-fatty acids. High dietary TFA intake has been associated with risk factors for cardiovascular disease. However, little is known about TFA levels in humans. To address this data need, we developed and validated a new isotope dilution-gas chromatography-negative chemical ionization-mass spectrometry (ID-GC-NCI-MS) method for quantitation of 27 fatty acids (FA) including 4 major TFA in human plasma, serum, and red blood cells (RBC) from 66 donors...
January 6, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29383632/protective-effect-of-ellagic-acid-against-sodium-arsenite-induced-cardio-and-hematotoxicity-in-rats
#11
Mehdi Goudarzi, Iman Fatemi, Amir Siahpoosh, Seyed Hashem Sezavar, Esrafil Mansouri, Saeed Mehrzadi
Ellagic acid (EA) is a phenolic constituent in certain fruits and nuts with wide range of biological activities, including potent antioxidant, antidiabetic, anti-inflammatory, anticancer and antimutagen properties. The aim of this study was to evaluate the effect of EA on sodium arsenic (SA)-induced cardio- and hematotoxicity in rats. Animals were divided into five groups. The first group was used as control. Group 2 was orally treated with sodium arsenite (SA, 10 mg/kg) for 21 days. Group 3 was orally treated with EA (30 mg/kg) for 14 days...
January 30, 2018: Cardiovascular Toxicology
https://www.readbyqxmd.com/read/29379088/the-inflammatory-effects-of-tnf-%C3%AE-and-complement-component-3-on-coagulation
#12
Martin J Page, Janette Bester, Etheresia Pretorius
Tissue necrosis factor-α (TNF-α) and complement component 3 (C3) are two well-known pro-inflammatory molecules. When TNF-α is upregulated, it contributes to changes in coagulation and causes C3 induction. They both interact with receptors on platelets and erythrocytes (RBCs). Here, we look at the individual effects of C3 and TNF-α, by adding low levels of the molecules to whole blood and platelet poor plasma. We used thromboelastography, wide-field microscopy and scanning electron microscopy to study blood clot formation, as well as structural changes to RBCs and platelets...
January 29, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29369792/hematology-from-embryo-to-adult-in-the-bobwhite-quail-colinus-virginianus-differential-effects-in-the-adult-of-clutch-sex-and-hypoxic-incubation
#13
Josele Flores-Santin, Maria Rojas Antich, Hiroshi Tazawa, Warren W Burggren
Hematology and its regulation in developing birds have been primarily investigated in response to relatively short-term environmental challenges in the embryo. Yet, whether any changes induced in the embryo persist into adulthood as a hematological form of "fetal programming" is unknown. We hypothesized that: 1) chronic as opposed to acute hypoxic incubation will alter hematological respiratory variables in embryos of bobwhite quail (Colinus virginianus), and 2) alterations first appearing in the embryo will persist into hatchlings through into adulthood...
January 21, 2018: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/29365116/prepartum-fatty-acid-supplementation-in-sheep-ii-supplementation-of-eicosapentaenoic-acid-and-docosahexaenoic-acid-during-late-gestation-alters-the-fatty-acid-profile-of-plasma-colostrum-milk-and-adipose-tissue-and-increases-lipogenic-gene-expression-of-adipose
#14
D N Coleman, K D Murphy, A E Relling
The objectives of this study were: 1) to establish whether feeding a source of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) to ewes during late gestation changes the fatty acid profile of colostrum, milk, ewe adipose tissue and plasma and subsequently lamb plasma and red blood cells (RBC), and 2) to investigate the effects of EPA and DHA on mRNA expression in ewe adipose tissue. Eighty-four gestating ewes (28 pens, 3/pen) were blocked by lambing day and assigned to a diet with an addition of fat at 0...
January 22, 2018: Journal of Animal Science
https://www.readbyqxmd.com/read/29359471/a-high-plasma-red-blood-cell-transfusion-ratio-during-liver-transplantation-is-associated-with-decreased-blood-utilization
#15
M B Pagano, R A Metcalf, J R Hess, J Reyes, J D Perkins, M I Montenovo
BACKGROUND: During massive transfusion, the volume ratio of administered plasma (PL Vol) to red blood cell (RBC Vol) appears to be associated with reduced blood utilization and improved survival. The aim of this study was to evaluate the optimal component ratio in the setting of liver transplantation. METHODS: This is a retrospective chart review of patients who underwent liver transplantation and received at least 500 ml of red blood cells from January 2013 through December 2015...
January 22, 2018: Vox Sanguinis
https://www.readbyqxmd.com/read/29359353/mri-quantification-of-human-fetal-o2-delivery-rate-in-the-second-and-third-trimesters-of-pregnancy
#16
Ana E Rodríguez-Soto, Michael C Langham, Osheiza Abdulmalik, Erin K Englund, Nadav Schwartz, Felix W Wehrli
PURPOSE: The purpose of this study was to estimate fetal O2 delivery rate in vivo across a range of gestational ages. Toward this, a calibration equation for T2 -based oximetry was derived. METHODS: Umbilical cord blood of varying hematocrit (Hct) and oxygen saturation (HbO2 ) levels was prepared and T2 measured using a T2 -prepared balanced steady-state free-precession sequence at 1.5 T. The relationship between blood R2  = 1/T2 , HbO2 and Hct was established based on the model R2=(1-Hct)R2,plasma+Hct R2,RBC+k·Hct·(1-Hct)·(1-HbO2)2...
January 22, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29346441/a-portable-system-for-processing-donated-whole-blood-into-high-quality-components-without-centrifugation
#17
Sean C Gifford, Briony C Strachan, Hui Xia, Eszter Vörös, Kian Torabian, Taylor A Tomasino, Gary D Griffin, Benjamin Lichtiger, Fleur M Aung, Sergey S Shevkoplyas
BACKGROUND: The use of centrifugation-based approaches for processing donated blood into components is routine in the industrialized world, as disparate storage conditions require the rapid separation of 'whole blood' into distinct red blood cell (RBC), platelet, and plasma products. However, the logistical complications and potential cellular damage associated with centrifugation/apheresis manufacturing of blood products are well documented. The objective of this study was to evaluate a proof-of-concept system for whole blood processing, which does not employ electromechanical parts, is easily portable, and can be operated immediately after donation with minimal human labor...
2018: PloS One
https://www.readbyqxmd.com/read/29344708/treatment-of-combined-traumatic-brain-injury-and-hemorrhagic-shock-with-fractionated-blood-products-versus-fresh-whole-blood-in-a-rat-model
#18
Akiva Leibowitz, Evgeni Brotfain, Leonid Koyfman, Moti Klein, Shmuel Hess, Alexander Zlotnik, Matthew Boyko
INTRODUCTION: Treatment of combined traumatic brain injury and hemorrhagic shock, poses a particular challenge due to the possible conflicting consequences. While restoring diminished volume is the treatment goal for hypovolemia, maintaining adequate cerebral perfusion pressure and avoidance of secondary damage remains a treatment goal for the injured brain. Various treatment modalities have been proposed, but the optimal resuscitation fluid and goals have not yet been clearly defined...
January 17, 2018: European Journal of Trauma and Emergency Surgery: Official Publication of the European Trauma Society
https://www.readbyqxmd.com/read/29344582/factor-xiii-in-plasma-but-not-in-platelets-mediates-red-blood-cell-retention-in-clots-and-venous-thrombus-size-in-mice
#19
Sravya Kattula, James R Byrnes, Sara M Martin, Lori A Holle, Brian C Cooley, Matthew J Flick, Alisa S Wolberg
The transglutaminase factor XIII (FXIII) stabilizes clots against mechanical and biochemical disruption and is essential for hemostasis. In vitro and in vivo models of venous thrombosis demonstrate that FXIII mediates clot size by promoting red blood cell (RBC) retention. However, the key source of FXIII and whether FXIII activity can be reduced to suppress thrombosis without imposing deleterious hemostatic consequences are 2 critical unresolved questions. FXIII is present in multiple compartments, including plasma (FXIIIplasma) as a heterotetramer of A2 and B2 subunits and platelets (FXIIIplt) as an A2 homodimer...
January 9, 2018: Blood Advances
https://www.readbyqxmd.com/read/29334571/use-of-french-lyophilized-plasma-transfusion-in-severe-trauma-patients-is-associated-with-an-early-plasma-transfusion-and-early-transfusion-ratio-improvement
#20
Cédric Nguyen, Julien Bordes, Pierre-Julien Cungi, Pierre Esnault, Michael Cardinale, Quentin Mathais, Jean Cotte, Sébastien Beaume, Anne Sailliol, Bertrand Prunet, Eric Meaudre
BACKGROUND: Early transfusion of high ratio of fresh frozen plasma (FFP) and red blood cells (RBC) is associated with mortality reduction. However, time to reach high ratio is limited by the need to thaw the FFP. French lyophilized plasma (FLYP) used by French army and available in military teaching hospital does not need to be thawed and is immediately available. We hypothesize that the use of FLYP may reduce time to reach a plasma:RBC ratio of 1/1. METHODS: A retrospective study performed in a Level 1 trauma center between January 2012 and December 2015...
January 12, 2018: Journal of Trauma and Acute Care Surgery
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