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https://www.readbyqxmd.com/read/27925242/red-blood-cell-mechanical-fragility-test-for-clinical-research-applications
#1
Luke A Ziegler, Salim E Olia, Marina V Kameneva
Red blood cell (RBC) susceptibility to mechanically induced hemolysis, or RBC mechanical fragility (MF), is an important parameter in the characterization of erythrocyte membrane health. The rocker bead test (RBT) and associated calculated mechanical fragility index (MFI) is a simple method for the assessment of RBC MF. Requiring a minimum of 15.5 mL of blood and necessitating adjustment of hematocrit (Ht) to a "standard" value (40%), the current RBT is not suitable for use in most studies involving human subjects...
December 7, 2016: Artificial Organs
https://www.readbyqxmd.com/read/27921101/the-effect-of-common-anticoagulants-in-detection-and-quantification-of-malaria-parasitemia-in-human-red-blood-cells-by-atr-ftir-spectroscopy
#2
Miguela Martin, David Perez-Guaita, Dean W Andrew, Jack S Richards, Bayden R Wood, Philip Heraud
Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR-FTIR) has the potential to become a new diagnostic tool for malaria and other diseases. For point-of-care testing, the use of ATR-FTIR in malaria diagnosis enables the analysis of blood in the aqueous state, which represents an enormous advantage by minimising the sample preparation by removing the need for cell fixation. Here we report the quantification of malaria parasitemia in human RBCs in their normal physiological aqueous state...
December 6, 2016: Analyst
https://www.readbyqxmd.com/read/27915453/effects-of-chronic-nitric-oxide-synthase-inhibition-on-v-o2max-and-exercise-capacity-in-mice
#3
M Wojewoda, K Przyborowski, B Sitek, A Zakrzewska, L Mateuszuk, J A Zoladz, S Chlopicki
Acute inhibition of NOS by L-NAME (N(ω)-nitro-L-arginine methyl ester) is known to decrease maximal oxygen consumption (V'O2max) and impair maximal exercise capacity, whereas the effects of chronic L-NAME treatment on V'O2max and exercise performance have not been studied so far. In this study, we analysed the effect of L-NAME treatment, (LN2 and LN12, respectively) on V'O2max and exercise capacity (in maximal incremental running and prolonged sub-maximal incremental running tests), systemic NO bioavailability (plasma nitrite (NO2(-)) and nitrate (NO3(-))) and prostacyclin (PGI2) production in C57BL6/J mice...
December 3, 2016: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/27914509/effects-of-docosahexaenoic-acid-supplementation-on-pufa-levels-in-red-blood-cells-and-plasma
#4
Jan Philipp Schuchardt, Annika I Ostermann, Lisa Stork, Laura Kutzner, Heike Kohrs, Theresa Greupner, Andreas Hahn, Nils Helge Schebb
INTRODUCTION: Polyunsaturated fatty acids (PUFA) are metabolized in a complex network of elongation, desaturation and beta oxidation. MATERIAL AND METHODS: The short (1 and 3 wk), and long term (6 and 12 wk) effect of 1076mg/d docosahexaenoic acid (DHA, free of eicosapentaenoic acid (EPA)) on (absolute) PUFA concentrations in plasma and red blood cells (RBC) of 12 healthy men (mean age 25.1±1.5 years) was investigated. RESULTS: RBC DHA concentrations significantly (p<0...
December 2016: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/27913514/understanding-red-blood-cell-alloimmunization-triggers
#5
Jeanne E Hendrickson, Christopher A Tormey
Blood group alloimmunization is "triggered" when a person lacking a particular antigen is exposed to this antigen during transfusion or pregnancy. Although exposure to an antigen is necessary for alloimmunization to occur, it is not alone sufficient. Blood group antigens are diverse in structure, function, and immunogenicity. In addition to red blood cells (RBCs), a recipient of an RBC transfusion is exposed to donor plasma, white blood cells, and platelets; the potential contribution of these elements to RBC alloimmunization remains unclear...
December 2, 2016: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/27913225/study-on-the-immunological-safety-of-universal-plasma-in-the-chinese-population-in-vitro
#6
Guanyi Chen, Liguo Zhu, Shufang Wang, Yuan Zhuang, Yang Yu, Deqing Wang
BACKGROUND: The prepared procedure for universal plasma in the Chinese population has been developed. However, the immunological safety with the level of antibodies, soluble immune complexes and complements is necessary to investigate. METHODS: The universal plasma was pooled at the optimal ratio of A:B:AB = 6:2.5:1.5 at 22 °C for 1 hour. The titer of IgM antibodies was detected by saline agglutination, and the titer of IgG antibodies was detected by a Polybrene test after IgM destroyed by 2-mereaptoethanol...
November 14, 2016: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/27911975/transfusion-requirements-in-esrd-patients-admitted-with-gi-hemorrhage-undergoing-inpatient-endoscopy
#7
Conor McCartney, Shrihari Santosh, Setu Patolia, Sadashiv Santosh
OBJECTIVES: To date there are no studies evaluating the utilization of blood products in patients with end-stage renal disease (ESRD) with gastrointestinal (GI) hemorrhage. This study estimated transfusion needs and determined predictors available at the time of admission for patients with ESRD admitted to a university hospital with GI bleeding requiring inpatient endoscopy. METHODS: A retrospective chart review was performed on all patients with ESRD who underwent inpatient endoscopy for suspected GI bleeding between 2009 and 2015...
December 2016: Southern Medical Journal
https://www.readbyqxmd.com/read/27902766/physical-properties-of-blood-are-altered-in-young-and-lean-women-with-polycystic-ovary-syndrome
#8
Michael J Simmonds, Nikki Milne, Kee Ong, Emily Brotherton, Antony P McNamee, Jarod Horobin, Surendran Sabapathy
Classic features of polycystic ovary syndrome (PCOS) include derangement of metabolic and cardiovascular health, and vascular dysfunction is commonly reported. These comorbidities indicate impaired blood flow; however, other than limited reports of increased plasma viscosity, surprisingly little is known regarding the physical properties of blood in PCOS. We aimed to investigate whether haemorheology was impaired in women with PCOS. We thus measured a comprehensive haemorheological profile, in a case-control design, of lean women with PCOS and age-matched healthy controls...
2016: PloS One
https://www.readbyqxmd.com/read/27900155/normal-platelet-function-in-platelet-concentrates-requires-non-platelet-cells-a-comparative-in-vitro-evaluation-of-leucocyte-rich-type-1a-and-leucocyte-poor-type-3b-platelet-concentrates
#9
William R Parrish, Breana Roides, Julia Hwang, Michael Mafilios, Brooks Story, Samir Bhattacharyya
BACKGROUND: Therapeutic success of platelet-rich plasma (PRP) may vary based on the composition and preparation method. The objective of this study was to evaluate the cellular components of platelet concentrates produced by a leucocyte-rich (LR-PRP) and a leucocyte-poor PRP systems (LP-PRP). METHODS: Parameters evaluated included platelet recovery, platelet concentration, red blood cell (RBC) and white blood cell (WBC) composition, platelet growth factor release and stimulation of human tendon cell proliferation in vitro...
2016: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/27888590/erythrocytes-membrane-alterations-reflecting-liver-damage-in-ccl%C3%A2-induced-cirrhotic-rats-the-ameliorative-effect-of-naltrexone
#10
Fatemeh Sarhadi Kholari, Ahmad Reza Dehpour, Mitra Nourbakhsh, Amir Hossein Doustimotlagh, Molood Bagherieh, Abolfazl Golestani
Cirrhosis is the consequence of chronic liver disease. Deleterious effects of oxidative stress on hepatocytes may be reflected in the erythrocyte membrane. Naltrexone (NTX) has been shown to attenuate hepatocellular injury in fibrotic animal models. The aim of this study was to investigate the progressive effect of CCl4 on the liver and whether the improvement of liver cirrhosis can be monitored through alterations in the erythrocyte membrane. In this study, 84 male Wistar rats were divided into 4 groups and received reagents (i...
October 2016: Acta Medica Iranica
https://www.readbyqxmd.com/read/27881556/nitrite-and-s-nitrosohemoglobin-exchange-across-the-human-cerebral-and-femoral-circulation-relationship-to-basal-and-exercise-blood-flow-responses-to-hypoxia
#11
Damian M Bailey, Peter Rasmussen, Morten Overgaard, Kevin A Evans, Aske M Bohm, Thomas Seifert, Patrice Brassard, Morten Zaar, Henning B Nielsen, Peter Raven, Niels H Secher
BACKGROUND: -The mechanisms underlying red blood cell (RBC)-mediated hypoxic vasodilation remain controversial with separate roles for nitrite (NO2(-)) and S-nitrosohemoglobin (SNO-Hb) widely contested given their ability to transduce nitric oxide (NO) bioactivity within the microcirculation. To establish their relative contribution in vivo, we quantified arterial-venous (a-v) concentration gradients across the human cerebral and femoral circulation at rest and during exercise, an ideal model system characterized by physiological extremes of O2 tension and blood flow...
November 15, 2016: Circulation
https://www.readbyqxmd.com/read/27870110/the-hematology-of-captive-bobtail-lizards-tiliqua-rugosa-blood-counts-light-microscopy-cytochemistry-and-ultrastructure
#12
Cheryl A Moller, Tibor Gaál, Jennifer N Mills
INTRODUCTION: Bobtail lizards (Tiliqua rugosa) are native to Australia. The only previous study on the hematology of this species documented just 6 animals. OBJECTIVES: The aims of this study were to characterize the light microscopy, ultrastructure and cytochemistry of blood cells, and evaluate CBCs of captive Bobtail lizards. METHODS: Over 2 consecutive summers, heparinized venous blood was collected from the ventral coccygeal vein of 46 clinically healthy, captive indoor- or outdoor-housed adult Bobtails...
November 21, 2016: Veterinary Clinical Pathology
https://www.readbyqxmd.com/read/27867562/analysis-of-risk-factors-for-and-the-prognosis-of-postoperative-acute-respiratory-distress-syndrome-in-patients-with-stanford-type-a-aortic-dissection
#13
Mei-Fang Chen, Liang-Wan Chen, Hua Cao, Yong Lin
BACKGROUND: To explore the risk factors for and the prognosis of postoperative acute respiratory distress syndrome (ARDS) in patients with Stanford type A aortic dissection (AD). METHODS: This retrospective nested case-control study included 527 Stanford type A AD patients who were divided into ARDS groups and non-ARDS groups. The clinical features of the groups were examined. RESULTS: The fifty-nine patients in the ARDS group exhibited extended durations of cardiopulmonary bypass (CPB) (P=0...
October 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/27861967/drone-transportation-of-blood-products
#14
Timothy Amukele, Paul M Ness, Aaron A R Tobian, Joan Boyd, Jeff Street
BACKGROUND: Small civilian unmanned aerial vehicles (drones) are a novel way to transport small goods. To the best of our knowledge there are no studies examining the impact of drone transport on blood products, describing approaches to maintaining temperature control, or component physical characteristics during drone transport. STUDY DESIGN AND METHODS: Six leukoreduced red blood cell (RBC) and six apheresis platelet (PLT) units were split using sterile techniques...
November 11, 2016: Transfusion
https://www.readbyqxmd.com/read/27861957/improved-donor-safety-in-high-volume-apheresis-collections
#15
Ralph R Vassallo, Marjorie D Bravo, Hany Kamel
BACKGROUND: Separators use 1960s sex-based nomograms to estimate apheresis donor blood volume and to calculate the 15% maximum extracorporeal and collection volumes. As US body habitus changes, proportional overestimation of the maximum safe collection volume may become clinically significant with large-volume collections. We correlated 2 years of vasovagal reaction (VVR) data with 148,416 Trima apheresis procedure parameters to identify trends. STUDY DESIGN AND METHODS: Only platelet/plasma with or without red blood cell (RBC) procedures yielded collection volumes of at least 900 mL with no saline replacement...
November 10, 2016: Transfusion
https://www.readbyqxmd.com/read/27851824/variant-exported-blood-stage-proteins-encoded-by-plasmodium-multigene-families-are-expressed-in-liver-stages-where-they-are-exported-into-the-parasitophorous-vacuole
#16
Aurélie Fougère, Andrew P Jackson, Dafni Paraskevi Bechtsi, Joanna A M Braks, Takeshi Annoura, Jannik Fonager, Roberta Spaccapelo, Jai Ramesar, Séverine Chevalley-Maurel, Onny Klop, Annelies M A van der Laan, Hans J Tanke, Clemens H M Kocken, Erica M Pasini, Shahid M Khan, Ulrike Böhme, Christiaan van Ooij, Thomas D Otto, Chris J Janse, Blandine Franke-Fayard
Many variant proteins encoded by Plasmodium-specific multigene families are exported into red blood cells (RBC). P. falciparum-specific variant proteins encoded by the var, stevor and rifin multigene families are exported onto the surface of infected red blood cells (iRBC) and mediate interactions between iRBC and host cells resulting in tissue sequestration and rosetting. However, the precise function of most other Plasmodium multigene families encoding exported proteins is unknown. To understand the role of RBC-exported proteins of rodent malaria parasites (RMP) we analysed the expression and cellular location by fluorescent-tagging of members of the pir, fam-a and fam-b multigene families...
November 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27845163/the-effect-of-htlv-1-virulence-factors-hbz-tax-proviral-load-hla-class-i-and-plasma-neopterin-on-manifestation-of-htlv-1-associated-myelopathy-tropical-spastic-paraparesis
#17
Hanieh Tarokhian, Mahdi Taghadosi, Hushang Rafatpanah, Taraneh Rajaei, Mahmoud Reza Azarpazhooh, Narges Valizadeh, S A Rahim Rezaee
BACKGROUND: Previous studies have suggested debatable roles of Tax and HBZ gene expression in the pathogenesis of HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP). In this study, HTLV-1 and host interactions in the manifestation of HAM/TSP were evaluated. METHODS: A cross-sectional study was conducted on 33 HAM/TSP patients and 38 HTLV-1 asymptomatic carriers (ACs). HTLV-1-Tax, HBZ gene expression, and proviral load (PVL) were assessed using the quantitative real-time PCR (TaqMan), host plasma neopterin level, and HLA-I, and the clinical manifestation were evaluated...
November 12, 2016: Virus Research
https://www.readbyqxmd.com/read/27835777/inflammatory-and-oxidative-stress-phenotypes-in-transgenic-sickle-cell-mice
#18
Emmanuelle Charrin, Solomon Fiifi Ofori-Acquah, Elie Nader, Sarah Skinner, Philippe Connes, Vincent Pialoux, Philippe Joly, Cyril Martin
The Townes mouse model of homozygous sickle cell disease (SS) has emerged as the major experimental model for studying pathophysiological mechanisms of human sickle cell disease (SCD). We therefore investigated hematological and hemorheological parameters as well as organ-specific inflammatory and oxidative stress molecular profiles in these animals in steady state conditions. Evidences of SCD-related intravascular hemolysis, impaired red blood cell (RBC) deformability, leukocytosis and altered plasma nitric oxide byproducts (NOx) level were found in the SS mice...
November 2016: Blood Cells, Molecules & Diseases
https://www.readbyqxmd.com/read/27834220/red-cells-dynamic-morphologies-govern-blood-shear-thinning-under-microcirculatory-flow-conditions
#19
Luca Lanotte, Johannes Mauer, Simon Mendez, Dmitry A Fedosov, Jean-Marc Fromental, Viviana Claveria, Franck Nicoud, Gerhard Gompper, Manouk Abkarian
Blood viscosity decreases with shear stress, a property essential for an efficient perfusion of the vascular tree. Shear thinning is intimately related to the dynamics and mutual interactions of RBCs, the major component of blood. Because of the lack of knowledge about the behavior of RBCs under physiological conditions, the link between RBC dynamics and blood rheology remains unsettled. We performed experiments and simulations in microcirculatory flow conditions of viscosity, shear rates, and volume fractions, and our study reveals rich RBC dynamics that govern shear thinning...
November 22, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27830776/artificial-blood-for-dogs
#20
Kana Yamada, Kyoko Yokomaku, Moeka Kureishi, Motofusa Akiyama, Kiyohito Kihira, Teruyuki Komatsu
There is no blood bank for pet animals. Consequently, veterinarians themselves must obtain "blood" for transfusion therapy. Among the blood components, serum albumin and red blood cells (RBCs) are particularly important to save lives. This paper reports the synthesis, structure, and properties of artificial blood for the exclusive use of dogs. First, recombinant canine serum albumin (rCSA) was produced using genetic engineering with Pichia yeast. The proteins showed identical features to those of the native CSA derived from canine plasma...
November 10, 2016: Scientific Reports
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