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Red blood cell antigen

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https://www.readbyqxmd.com/read/28438419/importance-of-extended-blood-group-genotyping-in-multiply-transfused-patients
#1
Nadila Haryani Osman, Jameela Sathar, Chooi Fun Leong, Noor Fadzilah Zulkifli, Raja Zahratul Azma Raja Sabudin, Ainoon Othman, Asral Wirda Ahmad Asnawi
Blood group antigen systems are not limited to the ABO blood groups. There is increasing interest in the detection of extended blood group systems on the red cell surface. The conventional method used to determine extended blood group antigens or red cell phenotype is by serological testing, which is based on the detection of visible haemagglutination or the presence of haemolysis. However, this technique has many limitations due to recent exposure to donor red cell, certain drugs or medications or other diseases that may alter the red cell membrane...
April 9, 2017: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28432341/detection-of-red-blood-cell-surface-antigens-by-probe-triggered-cell-collision-and-flow-retardation-in-an-autonomous-microfluidic-system
#2
Éva Sautner, Krisztián Papp, Eszter Holczer, Eszter L Tóth, Rita Ungai-Salánki, Bálint Szabó, Péter Fürjes, József Prechl
Microfluidic devices exploit combined physical, chemical and biological phenomena that could be unique in the sub-millimeter dimensions. The current goal of development of Point-of-Care (POC) medical devices is to extract the biomedical information from the blood. We examined the characteristics of blood flow in autonomous microfluidic devices with the aim to realize sensitive detection of interactions between particulate elements of the blood and the appropriately modified surfaces of the system. As a model experiment we demonstrated the fast analysis of the AB0 blood group system...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28425751/development-of-red-blood-cell-autoantibodies-following-treatment-with-checkpoint-inhibitors-a-new-class-of-anti-neoplastic-immunotherapeutic-agents-associated-with-immune-dysregulation
#3
Laura L Cooling, John Sherbeck, Jonathon C Mowers, Sheri L Hugan
Ipilimumab, nivolumab, and pembrolizumab represent a new class of immunotherapeutic drugs for treating patients with advanced cancer. Known as checkpoint inhibitors, these drugs act to upregulate the cellular and humoral immune response to tumor antigens by inhibiting T-cell autoregulation. As a consequence, they can be associated with immune-related adverse events (irAEs) due to loss of self-tolerance, including rare cases of immune-related cytopenias. We performed a retrospective clinical chart review, including serologic, hematology, and chemistry laboratory results, of two patients who developed red blood cell (RBC) autoantibodies during treatment with a checkpoint inhibitor...
January 2017: Immunohematology
https://www.readbyqxmd.com/read/28425750/modeling-alloantibody-formation-to-high-incidence-red-blood-cell-antigens-in-immune-responders-using-genotypic-data
#4
Patricia A R Brunker, Keerthana Ravindran, R S Shirey
Alloimmunization to red blood cell antigens is unpredictable and poorly understood. Patients who are negative for high-incidence antigens (HIAs) are at risk for developing the corresponding antibodies. Molecular methods can easily predict the lack of an antigen and thus, the risk of an individual to become immunized. We examined the prevalence and risk factors for HIA alloimmunization in patients at risk based on genotyping results. Genotyping using a molecular method (HEA BeadChip™, Immucor, Warren, NJ) was performed on all patient specimens referred for molecular testing over 45 months; serologic and clinical data were analyzed...
January 2017: Immunohematology
https://www.readbyqxmd.com/read/28425749/hemolytic-transfusion-reaction-attributable-to-anti-dia
#5
Arthur J Joyce, Kelli M Quantock, Ray Banh, Yew W Liew
In situations when a patient's antibody detection test is negative, many institutions have moved from an indirect antiglobulin test (IAT) crossmatch to an electronic crossmatch system. Here we report a case of an acute hemolytic transfusion reaction attributable to anti-Dia in a patient with a negative antibody detection test. A 22-year-old female patient with a diagnosis of β thalassemia and sickle cell anemia commenced a routine exchange transfusion of 5 units of red blood cells (RBCs) in the apheresis unit as part of her regular treatment...
January 2017: Immunohematology
https://www.readbyqxmd.com/read/28401678/a-and-b-antigen-levels-acquired-by-group-o-donor-derived-erythrocytes-following-abo-non-identical-transfusion-or-minor-abo-incompatible-haematopoietic-stem-cell-transplantation
#6
A K Hult, J H Dykes, J R Storry, M L Olsson
BACKGROUND AND OBJECTIVES: ABO-incompatible haematopoietic stem cell transplantation (HSCT) presents a challenge to blood component transfusion. The aim of this study was to investigate the weak blood group A or B antigen expression by donor-derived group O red blood cells (RBC) observed following transfusion or minor ABO-incompatible HSCT. In addition, in vitro experiments were performed to elucidate possible mechanisms underlying this phenomenon. MATERIALS AND METHODS: A sensitive flow cytometry assay for the semi-quantification of RBC A/B antigen levels was used to assess patient samples and evaluate in vitro experiments...
April 12, 2017: Transfusion Medicine
https://www.readbyqxmd.com/read/28398662/rhesus-ce-expression-on-patient-red-blood-cells-is-an-independent-prognostic-factor-for-adenocarcinoma-of-the-lung
#7
A B Schulze, L H Schmidt, L Baie, B Heitkötter, A Kümmel, M Mohr, R Buhl, H Hillmann, G Geißler, R Kelsch, D Görlich, W E Berdel, W Hartmann, R Wiewrodt
OBJECTIVES: The influence of blood group antigens on cancerogenesis is shown for distinct tumor types, yet the impact of Rhesus blood group antigens in lung cancer is not clarified. MATERIALS AND METHODS: To investigate the impact of Rhesus blood groups a non-small cell lung cancer (NSCLC) collective (n=1,047) was analyzed retrospectively. Using a second cohort of n=340 primarily operated stage I-III NSCLC patients, we evaluated immunohistochemistry of CD47-antibody stained tissue samples in correlation to histopathologic subtype and Rhesus blood group...
April 11, 2017: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/28397469/intracellular-storage-of-duffy-antigen-binding-chemokines-by-duffy-positive-red-blood-cells
#8
Ayako Yamamoto, Norihiro Saito, Shu Ogasawara, Toshihiro Shiratori, Jun Kondo, Masamichi Itoga, Hiroyuki Kayaba
BACKGROUND: Duffy antigen/chemokine receptor (DARC) is a non-signaling receptor for multiple chemokines. The role of DARC on red blood cells (RBCs) has remained elusive. The purpose of this study was to analyze selective storage of DARC-binding chemokines in RBCs. METHODS: Peripheral blood from healthy volunteers with DARC-positive blood type was collected in EDTA tubes. The concentration of DARC binding chemokines (i.e., MCP-1, RANTES, eotaxin-1, TARC, and IL-8), DARC nonbinding chemokines (i...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28390315/glutathione-inhibits-antibody-and-complement-mediated-immunologic-cell-injury-via-multiple-mechanisms
#9
Zhen Zhang, Xiling Zhang, Xin Fang, Manabu Niimi, Yanru Huang, Honglan Piao, Shan Gao, Jianglin Fan, Jian Yao
Antioxidant glutathione (GSH) plays an important role in the regulation of immunity. However, little is known about its effects on humoral immunity, especially its action on effector molecules like antibody and complement. Given that these molecules contain abundant disulfide bonds, we speculated that GSH might influence the action of these proteins via its thiol function. Using a model of a glomerular mesangial cell (MC) lysis induced by antibodies plus complement, we addressed this hypothesis. Exposure of rat MCs to anti-Thy-1 antibody plus complement or anti-MC rabbit serum caused a complement-dependent cell lysis, which was completely blocked by GSH...
March 31, 2017: Redox Biology
https://www.readbyqxmd.com/read/28389344/emergency-transfusion-of-patients-with-unknown-blood-type-with-blood-group-o-rhesus-d-positive-red-blood-cell-concentrates-a-prospective-single-centre-observational-study
#10
Kathleen Selleng, Gregor Jenichen, Kathrin Denker, Sixten Selleng, Bernd Müllejans, Andreas Greinacher
BACKGROUND: Emergency patients with unknown blood type usually receive O Rhesus D negative (RhD-) red blood cell concentrates until their blood group is determined to prevent RhD+ related adverse transfusion reactions. As 85% of individuals are RhD+, this consumption of O RhD- red blood cell concentrates contributes to shortages of O RhD- red blood cell concentrates, sometimes forcing transfusion of known RhD- patients with RhD+ red blood cell concentrates. Here we report the outcome of this transfusion policy transfusing all emergency patients with unknown blood type with O RhD+ red blood cell concentrates...
April 4, 2017: Lancet Haematology
https://www.readbyqxmd.com/read/28385575/intersecting-worlds-of-transfusion-and-transplantation-medicine-an-international-symposium-organized-by-the-canadian-blood-services-centre-for-innovation
#11
REVIEW
Kendra M Hodgkinson, Jeffrey Kiernan, Andrew W Shih, Ziad Solh, William P Sheffield, Nicolas Pineault
The principal theme of the symposium was centered on how the world of regenerative medicine intersects with that of transfusion medicine, with a particular focus on hematopoietic stem cells (HSCs) and stem cell therapies. The symposium highlighted several exciting developments and identified areas where additional research is needed. A revised map of human hematopoietic hierarchy was presented based on the functional and phenotypic analysis of thousands of single stem and progenitor cells from adult bone marrow and fetal liver...
March 22, 2017: Transfusion Medicine Reviews
https://www.readbyqxmd.com/read/28373555/plasmodium-falciparum-erythrocyte-binding-antigen-175-triggers-a-biophysical-change-in-the-red-blood-cell-that-facilitates-invasion
#12
Marion Koch, Katherine E Wright, Oliver Otto, Maik Herbig, Nichole D Salinas, Niraj H Tolia, Timothy J Satchwell, Jochen Guck, Nicholas J Brooks, Jake Baum
Invasion of the red blood cell (RBC) by the Plasmodium parasite defines the start of malaria disease pathogenesis. To date, experimental investigations into invasion have focused predominantly on the role of parasite adhesins or signaling pathways and the identity of binding receptors on the red cell surface. A potential role for signaling pathways within the erythrocyte, which might alter red cell biophysical properties to facilitate invasion, has largely been ignored. The parasite erythrocyte-binding antigen 175 (EBA175), a protein required for entry in most parasite strains, plays a key role by binding to glycophorin A (GPA) on the red cell surface, although the function of this binding interaction is unknown...
April 3, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28369973/persistent-symptomatic-parvovirus-b19-infection-with-severe-thrombocytopenia-transmitted-by-red-blood-cell-transfusion-containing-low-parvovirus-b19-dna-levels
#13
Keiki Nagaharu, Yuka Sugimoto, Yuji Hoshi, Takanori Yamaguchi, Ryugo Ito, Keiji Matsubayashi, Keiki Kawakami, Kohshi Ohishi
BACKGROUND: Transfusion-mediated human parvovirus B19 (PVB19) infection is rare but often causes severe hematologic disorders. In Japan, routine blood donor screening for PVB19 antigen (detection sensitivity, 10(6.4) IU/mL) using a chemiluminescent enzyme immunoassay (CLEIA) was introduced in 2008. However, there is no consensus on the minimal infectious dose of PVB19 permissible for red blood cells (RBCs). CASE REPORT: A 64-year-old man, who had received hemodialysis for diabetic nephropathy for 5 years, underwent an RBC transfusion for anemia caused by hemorrhagic enterocolitis...
April 2, 2017: Transfusion
https://www.readbyqxmd.com/read/28369969/a-rare-potentially-life-threatening-presentation-of-passenger-lymphocyte-syndrome
#14
Thomas J Gniadek, Andrea M McGonigle, R Sue Shirey, Patricia A Brunker, Michael Streiff, Benjamin Philosophe, Evan M Bloch, Paul M Ness, Karen E King
BACKGROUND: Passenger lymphocyte syndrome occurs when donor lymphocytes are transplanted with a solid organ and produce alloantibodies that react with antigens on the recipient's red blood cells (RBCs). Typically, passenger lymphocyte syndrome presents as immunoglobulin G antibody-mediated, extravascular hemolytic anemia with reticulocytosis. Often, the donor was alloimmunized before transplantation. CASE REPORT: A 34-year-old Group O, D+ man with a negative antibody screen received a liver transplant from a Group O, D- donor...
May 2017: Transfusion
https://www.readbyqxmd.com/read/28368498/the-antigen-presenting-potential-of-v%C3%AE-9v%C3%AE-2-t-cells-during-plasmodium-falciparum-blood-stage-infection
#15
Jennifer Howard, Séverine Loizon, Christopher J Tyler, Dorothée Duluc, Bernhard Moser, Matthieu Mechain, Alexandre Duvignaud, Denis Malvy, Marita Troye-Blomberg, Jean-Francois Moreau, Matthias Eberl, Odile Mercereau-Puijalon, Julie Déchanet-Merville, Charlotte Behr, Maria Mamani-Matsuda
During Plasmodium falciparum infections, erythrocyte-stage parasites inhibit dendritic cell maturation and function; compromising development of effective anti-malarial adaptive immunity. Human Vγ9Vδ2 T-cells can act in vitro as APCs and induce αβ T-cell activation. However, the relevance of this activity in pathophysiological contexts in vivo has remained elusive. Since Vγ9Vδ2 T-cells are activated during the early immune response against P.falciparum infection, we investigated whether they could contribute to the instruction of adaptive immune responses toward malaria parasites...
March 27, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28345691/surface-plasmon-resonance-imaging-for-abh-antigen-detection-on-red-blood-cells-and-in-saliva-secretor-status-related-abo-subgroup-identification
#16
Patjaree Peungthum, Krisda Sudprasert, Ratthasart Amarit, Armote Somboonkaew, Boonsong Sutapun, Apirom Vongsakulyanon, Wuttigrai Seedacoon, Pimpun Kitpoka, Mongkol Kunakorn, Toemsak Srikhirin
Low antigenic expression of ABO subgroup system on red blood cell (RBC) is cause of discrepancy between forward and reverse blood typing in the standard agglutination technique. Neutralization agglutination is employed for verification of the detection of ABH substances in saliva. However, the neutralization technique is complicated, time-consuming and requires expertise. To overcome these drawbacks, surface plasmon resonance (SPR) imaging was developed for ABH antigen detection on RBCs and in saliva. An antibody array was designed to classify the ABO subgroups by anti-A, anti-B, and anti-H antibodies; the array was immobilized on a carboxymethyl-dextran sensor-surface...
March 27, 2017: Analyst
https://www.readbyqxmd.com/read/28340248/irradiation-of-red-blood-cells-and-alloimmunization
#17
Christopher A Tormey, Jeanne E Hendrickson
Background: Animal models suggest that red blood cell (RBC) damage incurred during storage can increase immunogenicity to some RBC antigens. We hypothesized that RBC irradiation, a source of oxidative damage, may result in higher RBC alloimmunization rates among transfusion recipients. Methods: Individuals receiving 1 or more gamma-irradiated RBC units, with follow-up antibody screening, were studied. We recorded diagnosis at the time of first irradiated RBC-unit transfusion, total irradiated RBCs received, and alloantibodies detected before and after irradiated RBC transfusion...
March 18, 2017: Laboratory Medicine
https://www.readbyqxmd.com/read/28330859/preempting-autoimmune-disease-with-induced-antigen-tolerance
#18
Kathryn Dupnik
Transfusion of red blood cells with antigenic peptides added to surface proteins is being explored as a tolerance-inducing intervention for autoimmune disease.
March 22, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28321225/epitope-specific-suppression-of-igg-responses-by-passively-administered-specific-igg-evidence-of-epitope-masking
#19
Joakim J E Bergström, Hui Xu, Birgitta Heyman
Specific IgG, passively administered together with particulate antigen, can completely prevent induction of antibody responses to this antigen. The ability of IgG to suppress antibody responses to sheep red blood cells (SRBCs) is intact in mice lacking FcγRs, complement factor 1q, C3, or complement receptors 1 and 2, suggesting that Fc-dependent effector functions are not involved. Two of the most widely discussed explanations for the suppressive effect are increased clearance of IgG-antigen complexes and/or that IgG "hides" the antigen from recognition by specific B cells, so-called epitope masking...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28316444/anti-g-with-concomitant-anti-c-and-anti-d-a-case-report-in-a-pregnant-woman
#20
Rabeya Yousuf, Ahmad Nasirudin Mustafa, Siew-Ling Ho, Yee-Loong Tang, Chooi-Fun Leong
The G antigen of Rh blood group system is present in almost all D-positive or C-positive red cells but absent from red cells lacking D and C antigens. The differentiation of anti-D and anti-C from anti-G is not necessary for routine transfusion; however, during pregnancy, it is important because anti-G can masquerade as anti-D and anti-C with initial antibody testing. The false presence of anti-D will exclude the patient from receiving anti-D immunoglobulin (RhIG) when the patient actually is a candidate for RhIG prophylaxis...
January 2017: Asian Journal of Transfusion Science
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