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function of blood group specific rbc

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https://www.readbyqxmd.com/read/30074758/cell-like-micromotors
#1
Berta Esteban-Fernández de Ávila, Weiwei Gao, Emil Karshalev, Liangfang Zhang, Joseph Wang
In the past decade, versatile micro- and nanosized machines have emerged as active agents for large-scale detoxification, sensing, microfabrication, and many other promising applications. Micromachines have also been envisioned as the next advancement in dynamic therapy with numerous proof-of-concept studies in drug delivery, microsurgery, and detoxification. However, the practical use of synthetic micromotors in the body requires the development of fully biocompatible designs facilitating micromotor movement in biological fluids of diverse composition and displaying desired functions in specific locations...
August 3, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/30033078/human-candidate-gene-polymorphisms-and-risk-of-severe-malaria-in-children-in-kilifi-kenya-a-case-control-association-study
#2
Carolyne M Ndila, Sophie Uyoga, Alexander W Macharia, Gideon Nyutu, Norbert Peshu, John Ojal, Mohammed Shebe, Kennedy O Awuondo, Neema Mturi, Benjamin Tsofa, Nuno Sepúlveda, Taane G Clark, Gavin Band, Geraldine Clarke, Kate Rowlands, Christina Hubbart, Anna Jeffreys, Silvia Kariuki, Kevin Marsh, Margaret Mackinnon, Kathryn Maitland, Dominic P Kwiatkowski, Kirk A Rockett, Thomas N Williams
BACKGROUND: Human genetic factors are important determinants of malaria risk. We investigated associations between multiple candidate polymorphisms-many related to the structure or function of red blood cells-and risk for severe Plasmodium falciparum malaria and its specific phenotypes, including cerebral malaria, severe malaria anaemia, and respiratory distress. METHODS: We did a case-control study in Kilifi County, Kenya. We recruited as cases children presenting with severe malaria to the high-dependency ward of Kilifi County Hospital...
August 2018: Lancet Haematology
https://www.readbyqxmd.com/read/30011272/interaction-of-the-human-erythrocyte-band-3-anion-exchanger-1-ae1-slc4a1-with-lipids-and-glycophorin-a-molecular-organization-of-the-wright-wr-blood-group-antigen
#3
Antreas C Kalli, Reinhart A F Reithmeier
The Band 3 (AE1, SLC4A1) membrane protein is found in red blood cells and in kidney where it functions as an electro-neutral chloride/bicarbonate exchanger. In this study, we have used molecular dynamics simulations to provide the first realistic model of the dimeric membrane domain of human Band 3 in an asymmetric lipid bilayer containing a full complement of phospholipids, including phosphatidylinositol 4,5-bisphosphate (PIP2) and cholesterol, and its partner membrane protein Glycophorin A (GPA). The simulations show that the annular layer in the inner leaflet surrounding Band 3 was enriched in phosphatidylserine and PIP2 molecules...
July 2018: PLoS Computational Biology
https://www.readbyqxmd.com/read/29593033/human-group-c-rotavirus-vp8-s-recognize-type-a-histo-blood-group-antigens-as-ligands
#4
Xiaoman Sun, Lihong Wang, Jianxun Qi, Dandi Li, Mengxuan Wang, Xin Cong, Ruchao Peng, Wengang Chai, Qing Zhang, Hong Wang, Hongling Wen, George F Gao, Ming Tan, Zhaojun Duan
Group/species C rotaviruses (RVCs) have been identified as important pathogens of acute gastroenteritis (AGE) in children, family-based outbreaks, as well as animal infections. However, little is known regarding their host-specific interaction, infection, and pathogenesis. In this study, we performed serial studies to characterize the function and structural features of a human G4P[2] RVC VP8* that is responsible for the host receptor interaction. Glycan microarrays demonstrated that the human RVC VP8* recognizes type A histo-blood group antigens (HBGAs), which was confirmed by synthetic glycan-/saliva-based binding assays and hemagglutination of red blood cells, establishing a paradigm of RVC VP8*-glycan interactions...
June 1, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29523134/effects-of-herbal-nutraceuticals-and-or-zinc-against-haemonchus-contortus-in-lambs-experimentally-infected
#5
Zora Váradyová, Dominika Mravčáková, Michal Babják, Magdalena Bryszak, Ľubomíra Grešáková, Klaudia Čobanová, Svetlana Kišidayová, Iveta Plachá, Alžbeta Königová, Adam Cieslak, Sylwester Slusarczyk, Lukasz Pecio, Mariusz Kowalczyk, Marián Várady
BACKGROUND: The gastrointestinal parasitic nematode Haemonchus contortus is a pathogenic organism resistant to several anthelmintics. This study assessed the efficacy of a medicinal herbal mixture (Herbmix) and organic zinc, as an essential trace element for the proper functioning of both unspecific and specific immune defensive mechanisms, against experimental infections with H. contortus in lambs. All lambs were infected orally with approximately 5000 third-stage larvae of a strain of H...
March 9, 2018: BMC Veterinary Research
https://www.readbyqxmd.com/read/29521775/implementation-of-a-massive-transfusion-protocol-evaluation-of-its-use-and-efficacy
#6
Shannon Broxton, Regina Medeiros, Adel Abuzeid, Corey Peterson, Autumn Schumacher
Massive transfusion protocols (MTPs) allow practitioners to follow a prescribed algorithm for the rapid replacement of blood products during a massive hemorrhage. They function as an established protocol to provide consistent treatment. Once implemented, the MTP must be evaluated to ensure best practice. The purpose of this clinical improvement project was to formally evaluate the use and efficacy of an MTP during its first year of implementation. The specific aims were to (1) determine whether MTP activations were missed; (2) compare outcomes between those patients managed by the MTP and those who were not; and (3) provide recommendations to the institution's stakeholders...
March 2018: Journal of Trauma Nursing: the Official Journal of the Society of Trauma Nurses
https://www.readbyqxmd.com/read/29099710/vitamins-d-and-e-combined-effect-on-the-rat-myocardium-under-alloxan-induced-diabetes
#7
B Osipiani, T Machavariani, T Gvamichava, I Gachechiladze, E Nikobadze
It is commonly known that in diabetes mellitus the risk of cardiovascular diseases and mortality increases. The purpose of this study was to determine the specific features of the morphological restructuring of the myocardium in the early stage of experimental diabetes and use the combined impact of powerful antioxidants (Vitamin C and Vitamin E) on the rat myocardium in conditions of alloxan-induced diabetes. The experimental animals were divided into three groups: 40 rats were the target, and 20 rats were the control...
October 2017: Georgian Medical News
https://www.readbyqxmd.com/read/29078358/crispr-cas9-knockouts-reveal-genetic-interaction-between-strain-transcendent-erythrocyte-determinants-of-plasmodium-falciparum-invasion
#8
Usheer Kanjee, Christof Grüring, Mudit Chaand, Kai-Min Lin, Elizabeth Egan, Jale Manzo, Patrick L Jones, Tiffany Yu, Robert Barker, Michael P Weekes, Manoj T Duraisingh
During malaria blood-stage infections, Plasmodium parasites interact with the RBC surface to enable invasion followed by intracellular proliferation. Critical factors involved in invasion have been identified using biochemical and genetic approaches including specific knockdowns of genes of interest from primary CD34+ hematopoietic stem cells (cRBCs). Here we report the development of a robust in vitro culture system to produce RBCs that allow the generation of gene knockouts via CRISPR/Cas9 using the immortal JK-1 erythroleukemia line...
October 31, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28976902/clinical-laboratory-tests-in-some-acute-exogenous-poisonings
#9
Stoilka G Tufkova, Ivan V Yankov, Diana A Paskaleva
BACKGROUND: There is no specific toxicological screening of clinical laboratory parameters in clinical toxicology when it comes to acute exogenous poisoning. AIM: To determine routine clinical laboratory parameters and indicators for assessment of vital functions in patients with acute intoxications. MATERIALS AND METHODS: One hundred and fifty-three patients were included in the present study. They were hospitalized in the Department of Clinical Toxicology at St...
September 1, 2017: Folia Medica
https://www.readbyqxmd.com/read/28798467/acclimation-to-prolonged-hypoxia-alters-hemoglobin-isoform-expression-and-increases-hemoglobin-oxygen-affinity-and-aerobic-performance-in-a-marine-fish
#10
Yihang K Pan, Rasmus Ern, Phillip R Morrison, Colin J Brauner, Andrew J Esbaugh
Hemoglobin (Hb) multiplicity is common in fish, yet despite its ubiquitous nature, the functional significance is unclear. Here we explore the hypothesis that Hb multiplicity plays a role in hypoxia tolerance using the red drum (Sciaenops ocellatus). Red drum is an economically and ecologically important species native to coastal regions and estuaries of the Gulf of Mexico - habitats that routinely experience pronounced hypoxic events. Using a transcriptomic approach, we demonstrate that red drum red blood cells express 7 and 5 Hbα and Hbβ isoforms, respectively...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28770196/functionality-of-immunoglobulin-g-and-immunoglobulin-m-antibody-physisorbed-on-cellulosic-films
#11
Ziwei Huang, Vikram Singh Raghuwanshi, Gil Garnier
The functionality and aging mechanism of antibodies physisorbed onto cellulosic films was investigated. Blood grouping antibodies immunoglobulin G (IgG) and immunoglobulin M (IgM) were adsorbed onto smooth cellulose acetate (CAF) and regenerated cellulose (RCF) films. Cellulose films and adsorbed IgG layers were characterized at the air and liquid interface by X-ray and neutron reflectivity (NR), respectively. Cellulose film 208 Å thick (in air) swell to 386 Å once equilibrated in water. IgG adsorbs from solution onto cellulose as a partial layer 62 Å thick...
2017: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/28769806/a-red-blood-cell-membrane-camouflaged-nanoparticle-counteracts-streptolysin-o-mediated-virulence-phenotypes-of-invasive-group-a-streptococcus
#12
Tamara Escajadillo, Joshua Olson, Brian T Luk, Liangfang Zhang, Victor Nizet
Group A Streptococcus (GAS), an important human-specific Gram-positive bacterial pathogen, is associated with a broad spectrum of disease, ranging from mild superficial infections such as pharyngitis and impetigo, to serious invasive infections including necrotizing fasciitis and streptococcal toxic shock syndrome. The GAS pore-forming streptolysin O (SLO) is a well characterized virulence factor produced by nearly all GAS clinical isolates. High level expression of SLO is epidemiologically linked to intercontinental dissemination of hypervirulent clonotypes and poor clinical outcomes...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28546025/molecular-and-functional-characterization-of-a-glycosylated-galactose-binding-lectin-from-mytilus-californianus
#13
Efrén García-Maldonado, Patricia Cano-Sánchez, Alejandra Hernández-Santoyo
Lectins play crucial roles for innate immune responses in invertebrates by recognizing and eliminating pathogens. In this study, a lectin from the mussel Mytilus californianus (MCL) was identified and characterized. The lectin was purified by affinity chromatography in α-lactose-agarose resin showing an experimental molecular mass of 18000 Da as determined by SDS-PAGE and MALDI-TOF mass spectrometry. It was specific for binding d-galactose and N-Acetyl-d-galactosamine that contained carbohydrate moieties that were also inhibited by melibiose and raffinose...
July 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28454066/direct-measurement-of-igm-antigen-interaction-energy-on-individual-red-blood-cells
#14
Natasha Yeow, Rico F Tabor, Gil Garnier
Most blood grouping tests rely on the principle of red blood cells (RBCs) agglutination. Agglutination is triggered by the binding of specific blood grouping antibodies to the corresponding RBC surface antigen on multiple cells. The interaction energies between blood grouping antibodies and antigens have been poorly defined in immunohaematology. Here for the first time, we functionalized atomic force microscope (AFM) cantilevers with the IgM form of blood grouping antibodies to probe populations of individual RBCs of different groups under physiological conditions...
July 1, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28248803/1-1-transfusion-strategies-are-right-for-the-wrong-reasons
#15
Stephanie A Savage, Ben L Zarzaur, Brian L Brewer, Garrett H Lim, Ali C Martin, Louis J Magnotti, Martin A Croce, Timothy H Pohlman
BACKGROUND: Early assessment of clot function identifies coagulopathies after injury. Abnormalities include a hypercoagulable state from excess thrombin generation, as well as an acquired coagulopathy. Efforts to address coagulopathy have resulted in earlier, aggressive use of plasma emphasizing 1:1 resuscitation. The purpose of this study was to describe coagulopathies in varying hemorrhagic profiles from a cohort of injured patients. METHODS: All injured patients who received at least one unit of packed red blood cells (PRBC) in the first 24 hours of admission from September 2013 to May 2015 were eligible for inclusion...
May 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28179282/the-gata-factor-revolution-in-hematology
#16
REVIEW
Koichi R Katsumura, Emery H Bresnick
The discovery of the GATA binding protein (GATA factor) transcription factor family revolutionized hematology. Studies of GATA proteins have yielded vital contributions to our understanding of how hematopoietic stem and progenitor cells develop from precursors, how progenitors generate red blood cells, how hemoglobin synthesis is regulated, and the molecular underpinnings of nonmalignant and malignant hematologic disorders. This thrilling journey began with mechanistic studies on a β-globin enhancer- and promoter-binding factor, GATA-1, the founding member of the GATA family...
April 13, 2017: Blood
https://www.readbyqxmd.com/read/28157207/mapping-the-distribution-of-specific-antibody-interaction-forces-on-individual-red-blood-cells
#17
Natasha Yeow, Rico F Tabor, Gil Garnier
Current blood typing methods rely on the agglutination of red blood cells (RBCs) to macroscopically indicate a positive result. An indirect agglutination mechanism is required when blood typing with IgG forms of antibodies. To date, the interaction forces between anti-IgG and IgG antibodies have been poorly quantified, and blood group related antigens have never been quantified with the atomic force microscope (AFM). Instead, the total intensity resulting from fluorescent-tagged antibodies adsorbed on RBC has been measured to calculate an average antigen density on a series of RBCs...
February 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/27701405/membrane-lipidomics-in-schizophrenia-patients-a-correlational-study-with-clinical-and-cognitive-manifestations
#18
C Tessier, K Sweers, A Frajerman, H Bergaoui, F Ferreri, C Delva, N Lapidus, A Lamaziere, J P Roiser, M De Hert, P Nuss
Schizophrenia is a severe mental condition in which several lipid abnormalities-either structural or metabolic-have been described. We tested the hypothesis that an abnormality in membrane lipid composition may contribute to aberrant dopamine signaling, and thereby symptoms and cognitive impairment, in schizophrenia (SCZ) patients. Antipsychotic-medicated and clinically stable SCZ outpatients (n=74) were compared with matched healthy subjects (HC, n=40). A lipidomic analysis was performed in red blood cell (RBC) membranes examining the major phospholipid (PL) classes and their associated fatty acids (FAs)...
October 4, 2016: Translational Psychiatry
https://www.readbyqxmd.com/read/27623272/right-minithoracotomy-versus-full-sternotomy-for-mitral-valve-repair-a%C3%A2-propensity-matched-comparison
#19
COMPARATIVE STUDY
Rüdiger Lange, Bernhard Voss, Victoria Kehl, Domenico Mazzitelli, Peter Tassani-Prell, Thomas Günther
BACKGROUND: Mitral valve (MV) repair through a right minithoracotomy (RT) is technically more demanding than through a median sternotomy (MS) and has been cited for a higher rate of reoperation, increased postoperative bleeding, thromboembolic events, poor visualization, and longer operative times. Randomized studies are not available, however, and specific characteristics of patients who undergo operation with either technique are usually highly different. Therefore, a propensity matching study was performed to reduce selection bias...
February 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/27621034/synthesis-characterization-biocompatible-and-anticancer-activity-of-green-and-chemically-synthesized-silver-nanoparticles-a-comparative-study
#20
COMPARATIVE STUDY
Sivaiah Kummara, Mrityunjaya B Patil, Tiewlasubon Uriah
Silver nanoparticles (AgNPs) are superior cluster of nanomaterials that are recently recognized for their different applications in various pharmaceutical and clinical settings. The objective of this work deals with novel method for biosynthesis of AgNPs using Azadirachta indica (neem) leaf extract as reducing agent. These bio and chemical synthesized nanoparticles were characterized with the help of UV-vis Spectroscopy, Nanotarc, Dynamic light scattering (DLS), Zeta Potential (ZP), Transmission Electron Microscopy and Fourier transform infrared spectroscopy (FTIR)...
December 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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