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Red blood cell blood group antigen

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https://www.readbyqxmd.com/read/27913515/cellular-immune-responses-in-red-blood-cell-alloimmunization
#1
James C Zimring, Krystalyn E Hudson
In excess of 340 blood group antigens have now been described that vary between individuals. Thus, any unit of blood that is nonautologous represents a significant dose of alloantigen. Most blood group antigens are proteins, which differ by a single amino acid between donors and recipients. Approximately 1 out of every 70 individuals are transfused each year (in the United States alone), which leads to antibody responses to red blood cell (RBC) alloantigens in some transfusion recipients. When alloantibodies are formed, in many cases, RBCs expressing the antigen in question can no longer be safely transfused...
December 2, 2016: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/27913514/understanding-red-blood-cell-alloimmunization-triggers
#2
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/27893356/single-stranded-dna-aptamer-targeting-and-neutralization-of-anti-d-alloantibody-a-potential-therapeutic-strategy-for-haemolytic-diseases-caused-by-rhesus-alloantibody
#3
Yinze Zhang, Fan Wu, Manni Wang, Naibao Zhuang, Huayou Zhou, Hua Xu
BACKGROUND: Rhesus (Rh) D antigen is the most important antigen in the Rh blood group system because of its strong immunogenicity. When RhD-negative individuals are exposed to RhD-positive blood, they may produce anti-D alloantibody, potentially resulting in delayed haemolytic transfusion reactions and Rh haemolytic disease of the foetus and newborn, which are difficult to treat. Inhibition of the binding of anti-D antibody with RhD antigens on the surface of red blood cells may effectively prevent immune haemolytic diseases...
November 11, 2016: Blood Transfusion, Trasfusione del Sangue
https://www.readbyqxmd.com/read/27893355/performance-evaluation-study-of-id-core-xt-a-high-throughput-blood-group-genotyping-platform
#4
Mónica López, Izaskun Apraiz, Montserrat Rubia, Mercedes Piedrabuena, Maria Azkarate, Barbera Veldhuisen, Miguel Á Vesga, Ellen Van Der Schoot, Fernando Puente, Diego Tejedor
BACKGROUND: Traditionally, red blood cell antigens have been identified using serological methods, but recent advances in molecular biology have made the implementation of methods for genetic testing of most blood group antigens possible. The goal of this study was to validate the performance of the ID CORE XT blood group typing assay. MATERIALS AND METHODS: One thousand independent samples from donors, patients and neonates were collected from three research institutes in Spain and the Netherlands...
November 25, 2016: Blood Transfusion, Trasfusione del Sangue
https://www.readbyqxmd.com/read/27891625/validation-of-the-multiplex-ligation-dependent-probe-amplification-assay-and-its-application-on-the-distribution-study-of-the-major-alleles-of-17-blood-group-systems-in-chinese-donors-from-guangzhou
#5
Yanli Ji, Jizhi Wen, Barbera Veldhuisen, Lonneke Haer-Wigman, Zhen Wang, Martin Lodén-van Straaten, Ling Wei, Guangping Luo, Yongshui Fu, C Ellen van der Schoot
BACKGROUND: Genotyping platforms for common red blood cell (RBC) antigens have been successfully applied in Caucasian and black populations but not in Chinese populations. In this study, a genotyping assay based on multiplex ligation-dependent probe amplification (MLPA) technology was applied in a Chinese population to validate the MLPA probes. Subsequently, the comprehensive distribution of 17 blood group systems also was obtained. STUDY DESIGN AND METHODS: DNA samples from 200 Chinese donors were extracted and genotyped using the blood-MLPA assay...
November 27, 2016: Transfusion
https://www.readbyqxmd.com/read/27871240/abo-antigen-and-secretor-statuses-are-not-associated-with-gut-microbiota-composition-in-1-500-twins
#6
Emily R Davenport, Julia K Goodrich, Jordana T Bell, Tim D Spector, Ruth E Ley, Andrew G Clark
BACKGROUND: Host genetics is one of several factors known to shape human gut microbiome composition, however, the physiological processes underlying the heritability are largely unknown. Inter-individual differences in host factors secreted into the gut lumen may lead to variation in microbiome composition. One such factor is the ABO antigen. This molecule is not only expressed on the surface of red blood cells, but is also secreted from mucosal surfaces in individuals containing an intact FUT2 gene (secretors)...
November 21, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27864153/immunogenicity-of-murine-mpeg-red-blood-cells-and-the-risk-of-anti-peg-antibodies-in-human-blood-donors
#7
Yevgeniya Le, Wendy M Toyofuku, Mark D Scott
The immunocamouflage of non-ABO blood group antigens by membrane grafted mPEG may attenuate the risk of RBC alloimmunization. However, concerns have been raised as to the immunogenic risk of PEG and PEG-RBC. To assess these risks, murine and human studies were done. Mice were exposed to soluble PEG prior to, or between, multiple transfusions (∼60 day intervals) of control or mPEG-RBC and cell survival was determined by flow cytometry. In some studies, the control and mPEG-RBC groups were reversed following one or more transfusions...
November 15, 2016: Experimental Hematology
https://www.readbyqxmd.com/read/27812254/evaluation-of-magnetized-erythrocyte-group-antigens-to-detect-abo-antibodies
#8
O Nathalang, K Intharanut, P Sriwanitchrak, M Setthakarn, S Duan, H Wang, S Ding, Y Li
Screening for IgM titers of anti-A and anti-B is recommended when providing ABO incompatible platelet transfusion. The life-time of reagent cells depends upon the preservative diluents. We aimed to evaluate the IgM titers of anti-A and anti-B testing with magnetized-erythrocyte group antigens (MEGA) and fresh RBCs and study the relationship of ABO antibody titers between both techniques. Altogether, 100 serum samples from group O donors at the National Blood Centre, Thai Red Cross Society, Bangkok, Thailand were included...
December 2016: Indian Journal of Hematology & Blood Transfusion
https://www.readbyqxmd.com/read/27809976/feeding-horses-with-industrially-manufactured-pellets-with-fungal-spores-to-promote-nematode-integrated-control
#9
José Ángel Hernández, Fabián Leonardo Arroyo, José Suárez, Cristiana Filipa Cazapal-Monteiro, Ángel Romasanta, María Eugenia López-Arellano, José Pedreira, Luis Manuel Madeira de Carvalho, Rita Sánchez-Andrade, María Sol Arias, Pedro Mendoza de Gives, Adolfo Paz-Silva
The usefulness of pellets industrially manufactured with spores of parasiticide fungi as a contribution to integrated nematode control was assessed in grazing horses throughout sixteen months. Two groups of 7 Pura Raza Galega autochthonous horses (G-T and G-P) were dewormed pour-on (1mg Ivermectin/kg bw) at the beginning of the trial, and other group (G-C) remained untreated. The G-P was provided daily with commercial pellets to which was added a mixture of fungal spores during the industrial manufacturing (2×10(6) spores of Mucor circinelloides and same dose of Duddingtonia flagrans/kg), and G-T and G-C received pellets without spores...
October 15, 2016: Veterinary Parasitology
https://www.readbyqxmd.com/read/27807866/a-jordanian-family-with-three-sisters-apparently-homozygous-for-m-k-and-evidence-for-clinical-significance-of-antibodies-produced-by-m-k-m-k-individuals
#10
Nour Al-Huda Al-Jada
BACKGROUND: The rare M(k) M(k) phenotype is the result of a deletion of the coding regions of both GYPA and GYPB. Red blood cells (RBCs) of individuals homozygous for the rare M(k) gene lack all MNS blood group antigens and have no glycophorin A or glycophorin B. This phenotype is extremely rare and only four families have been reported. CASE REPORT: A 28-year-old woman was referred for assessment of recurrent early neonatal deaths. She was found to be apparently homozygous for M(k) ...
November 3, 2016: Transfusion
https://www.readbyqxmd.com/read/27794527/the-challenges-of-daratumumab-in-transfusion-medicine
#11
REVIEW
Michael F Dizon
The field of transfusion medicine has evolved rapidly in recent years, but the central principle of transfusion is still simple, namely, the antigen-antibody interaction. Daratumumab (DARA), a monoclonal antibody (MoAb), was developed to treat relapsed/refractory multiple myeloma (RRMM). DARA works by targeting the CD38 portion of malignant cells; however, this drug attaches to the red blood cell (RBC) reagents used in blood banks, further complicating the antibody identification work-up. The AABB (formerly known as the American Association of Blood Banks) has issued a memorandum on how blood banks can effectively address panreactivity caused by DARA...
October 28, 2016: Laboratory Medicine
https://www.readbyqxmd.com/read/27784393/-indentification-and-sequence-analysis-of-a-individual-with-b305-blood-group-gene-subtypes-of-abo-variant
#12
Gui-Ji Li, Xu Zhang
OBJECTIVE: To investigate and identify the molecular and biological characteristics of B305 blood group gene subtypes of a ABO variant. METHODS: The individual was confirmed by standard serological techniques. The genotyping and sequencing were performed by using polymerase chain reaction-sequence specific primer (PCR-SSP), direct sequencing and gene cloning for Exon 6 and exon 7 of ABO locus respectively. RESULTS: B antigen was detected on red blood cells of the proband and there was anti-A antibody in the serum...
October 2016: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/27717418/advances-in-blood-typing
#13
N Quraishy, S Sapatnekar
The clinical importance of blood group antigens relates to their ability to evoke immune antibodies that are capable of causing hemolysis. The most important antigens for safe transfusion are ABO and D (Rh), and typing for these antigens is routinely performed for patients awaiting transfusion, prenatal patients, and blood donors. Typing for other blood group antigens, typically of the Kell, Duffy, Kidd, and MNS blood groups, is sometimes necessary, for patients who have, or are likely to develop antibodies to these antigens...
2016: Advances in Clinical Chemistry
https://www.readbyqxmd.com/read/27708211/can-mutations-in-the-gene-encoding-transcription-factor-eklf-erythroid-kr%C3%A3-ppel-like-factor-protect-us-against-infectious-and-parasitic-diseases
#14
Krzysztof Mikołajczyk, Radosław Kaczmarek, Marcin Czerwiński
Transcription factor EKLF (Erythroid Krüppel-Like Factor) belongs to the group of Krüppellike factors, which regulate proliferation, differentiation, development and apoptosis of mammalian cells. EKLF factor is present in erythroid cells, where it participates in regulation of hematopoiesis, expression of genes encoding transmembrane proteins (including blood group antigens), and heme biosynthesis enzymes. It is also a key factor in downregulation of γ-globins and activation of β-globin gene expression...
October 6, 2016: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/27687888/immunosuppressive-effects-of-arsenic-in-broiler-chicks-exposed-to-newcastle-disease-virus
#15
Adeel Sattar, Ahrar Khan, Hafiz Iftikhar Hussain, Cheng He, Riaz Hussain, Shen Zhiqiang, Muhammad Kashif Saleemi, Shafia Tehseen Gul
To assess the effects of prolonged exposure to arsenic (As, as arsenate) on host immune competence overall and resistance to Newcastle disease (ND) viral infection in particular, a study was carried out in broiler chicks. At 7 days of age, chicks were assigned to groups that would undergo varying vaccination, challenge, and/or As exposures; Group 1 was a control; Group 2 was to receive Newcastle disease virus (NDV) only; two groups (Groups 3, 4) were to be given As daily (50 mg/kg, by gavage) from Days 7-35 of the experiment...
August 10, 2016: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/27618621/abo-blood-group-antigen-mismatch-has-an-impact-on-outcome-after-allogeneic-peripheral-blood-stem-cell-transplantation
#16
Matthias Grube, Daniel Wolff, Norbert Ahrens, Philipp Y Herzberg, Wolfgang Herr, Ernst Holler
ABO blood group antigen incompatibility (ABO mismatch) is not an obstacle to allogeneic stem cell transplantation (allo-SCT). However, the impact on clinical outcome after allo-SCT remains controversial. We analyzed 512 patients after allogeneic peripheral blood SCT (allo-PBSCT) for an association of ABO mismatch with transfusion requirements, myeloid and platelet engraftment, the incidence of GvHD, relapse, transplant-related mortality (TRM), and overall survival (OS). A total of 260 patients underwent ABO-mismatched transplantation and the control group consisted of 252 patients with ABO-matched allo-PBSCT...
September 12, 2016: Clinical Transplantation
https://www.readbyqxmd.com/read/27609123/genotyping-of-19-red-cell-antigens-including-rhd-using-liquid-bead-arrays
#17
Ho Eun Chang, Yun Ji Hong, Hyungsuk Kim, Sang Mee Hwang, Jeong Su Park, Seong-Wook Lee, Eun Young Song, Kyoung Un Park, Junghan Song, Kyou-Sup Han
BACKGROUND: Traditionally, the determination of blood group has been performed using serological techniques. Due to the drawbacks of using antisera, molecular typing of blood groups has been introduced. However, the commonly used genotyping assays in blood banks have limitations because the panels for these were based on genetic variations in Caucasians. METHODS: We developed a multiplex human erythrocyte antigen genotyping assay using allele-specific primer extensions and hybridization with bead microarrays...
November 1, 2016: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/27605857/anti-m-antibodies-biphasic-reactive-at-room-temperature-and-at-37%C3%A2-c-a-case-series
#18
Siddhi P Shah, Sangeeta M Kalgutkar, Rajesh B Sawant, Anand S Deshpande
Anti-M antibody, which is not reactive at 37°C, is not clinically significant. Reports of clinically significant anti-M antibodies causing hemolytic disease of the fetus and the newborn (HDFN) and delayed hemolytic transfusion reaction (DHTR) are available. We report 13 cases of anti-M antibodies reactive at room temperature (RT) and at 37°C. These were found in patients of varied age groups (11 months to 85 years) with varied clinical diagnosis. All the female patients were multigravida. In all cases, antibody screening was positive at RT as well as at the indirect antiglobulin test (IAT) phase...
July 2016: Asian Journal of Transfusion Science
https://www.readbyqxmd.com/read/27605852/impact-of-antigenic-exposures-and-role-of-molecular-blood-grouping-in-enhancing-transfusion-safety-in-chronically-transfused-thalassemics
#19
Raj Nath Makroo, Soma Agrawal, Aakanksha Bhatia, Mohit Chowdhry, Uday Kumar Thakur
BACKGROUND: Red cell alloimmunization is an acknowledged complication of blood transfusion. Current transfusion practices for thalassemia do not cater to this risk. Serological phenotyping is usually not reliable in these cases unless performed before the first transfusion. Under such circumstances, molecular blood grouping is an effective alternative. AIM: To perform molecular blood group genotyping in chronically transfused thalassemia patients and assess the risk of antigenic exposure and incidence of alloimmunization with current transfusion protocols...
July 2016: Asian Journal of Transfusion Science
https://www.readbyqxmd.com/read/27603310/stabilization-of-transfected-cells-expressing-low-incidence-blood-group-antigens-novel-methods-facilitating-their-use-as-reagent-cells
#20
Cecilia González, Rosa Esteban, Carme Canals, Eduardo Muñiz-Díaz, Núria Nogués
BACKGROUND: The identification of erythrocyte antibodies in the serum of patients rely on panels of human red blood cells (RBCs), which coexpress many antigens and are not easily available for low-incidence blood group phenotypes. These problems have been addressed by generating cell lines expressing unique blood group antigens, which may be used as an alternative to human RBCs. However, the use of cell lines implies several drawbacks, like the requirement of cell culture facilities and the high cost of cryopreservation...
2016: PloS One
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