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Clinically significant alloantibody

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https://www.readbyqxmd.com/read/27866583/transfusion-medicine
#1
REVIEW
Nathan T Connell
Transfusion of various blood components can provide relief from symptomatic anemia and reduce the bleeding risks associated with low platelet counts or presence of coagulopathy. Blood components are collected from volunteer donors and processed into separate components to maximize efficient utilization of a scarce resource while also providing maximum clinical benefit. Tests including blood type and screening for clinically significant alloantibodies increase the likelihood of successful transfusion. Risks of transfusion include hypersensitivity and hemolytic transfusion reactions, transfusion-related acute lung injury, transfusion-associated circulatory overload, and transmission of infection...
December 2016: Primary Care
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
#2
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/27798373/prolongation-of-cardiac-allograft-survival-by-endometrial-regenerative-cells-focusing-on-b-cell-responses
#3
Xiaoxi Xu, Xiaochun Li, Xiangying Gu, Bai Zhang, Weijun Tian, Hongqiu Han, Peng Sun, Caigan Du, Hao Wang
: : Endometrial regenerative cells (ERCs) have been recently evaluated as an attractive candidate source for emerging stem cell therapies in immunosuppression, but their role in immunoregulation is not fully understood. The present study was designed to investigate their effects, especially on B-cell responses in heart transplantation. In this study, ERCs were noninvasively obtained from menstrual blood. Heart transplantation was performed between C57BL/6 (H-2(b)) donor mice and BALB/c (H-2(d)) recipients...
October 26, 2016: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/27764238/distribution-of-di-a-and-di-b-allele-frequencies-and-comparisons-among-central-thai-and-other-populations
#4
Oytip Nathalang, Puangpaka Panichrum, Kamphon Intharanut, Phatchira Thattanon, Siriporn Nathalang
Alloantibodies to the Diego (DI) blood group system, anti-Dia and anti-Dib are clinically significant in causing hemolytic transfusion reactions (HTRs) and hemolytic disease of the fetus and newborn (HDFN), especially in Asian populations with Mongolian ancestry. This study aimed to report the frequency of the DI*A and DI*B alleles in a Central Thai population and to compare them with those of other populations previously published. Altogether, 1,011 blood samples from unrelated healthy blood donors at the National Blood Centre, Thai Red Cross Society, Bangkok were included...
2016: PloS One
https://www.readbyqxmd.com/read/27734515/bortezomib-decreases-the-magnitude-of-a-primary-humoral-immune-response-to-transfused-red-blood-cells-in-a-murine-model
#5
Prabitha Natarajan, Jingchun Liu, Manjula Santhanakrishnan, David R Gibb, Lewis M Slater, Jeanne E Hendrickson
BACKGROUND: Few therapeutic options currently exist to prevent or to mitigate transfusion-associated red blood cell (RBC) alloimmunization. We hypothesized that bortezomib, a proteasome inhibitor currently being utilized for HLA alloantibody and ADAMTS13 autoantibody reduction, may be beneficial in a transfusion setting. Herein, we utilized a reductionist murine model to test our hypothesis that bortezomib would decrease RBC alloimmune responses. STUDY DESIGN AND METHODS: Wild-type mice were treated with bortezomib or saline and transfused with murine RBCs expressing the human KEL glycoprotein...
October 13, 2016: Transfusion
https://www.readbyqxmd.com/read/27648075/allogeneic-mesenchymal-stem-cell-treatment-induces-specific-alloantibodies-in-horses
#6
Sean D Owens, Amir Kol, Naomi J Walker, Dori L Borjesson
Background. It is unknown whether horses that receive allogeneic mesenchymal stem cells (MSCs) injections develop specific humoral immune response. Our goal was to develop and validate a flow cytometric MSC crossmatch procedure and to determine if horses that received allogeneic MSCs in a clinical setting developed measurable antibodies following MSC administration. Methods. Serum was collected from a total of 19 horses enrolled in 3 different research projects. Horses in the 3 studies all received unmatched allogeneic MSCs...
2016: Stem Cells International
https://www.readbyqxmd.com/read/27632931/serological-blind-spots-for-variants-of-human-igg3-and-igg4-by-a-commonly-used-anti-immunoglobulin-reagent
#7
Heather L Howie, Meghan Delaney, Xiaohong Wang, Lay See Er, Gestur Vidarsson, Tamara C Stegmann, Linda Kapp, Jenna N Lebedev, Yanyun Wu, James P AuBuchon, James C Zimring
BACKGROUND: Human immunoglobulin G (IgG) includes four different subtypes (IgG1, IgG2, IgG3, and IgG4), and it is also now appreciated that there are genetic variations within IgG subtypes (called isoallotypes). Twenty-nine different isoallotypes have been described, with 7, 4, 15, and 3 isoallotypes described for IgG1, IgG2, IgG3, and IgG4, respectively. The reactivity of anti-IgG with different isoallotypes has not been characterized. STUDY DESIGN AND METHODS: A novel monoclonal anti-K antibody (PugetSound Monoclonal Antibody 1 [PUMA1]) was isolated and sequenced, and a panel of PUMA1 variants was expressed, consisting of the 29 known IgG isoallotypes...
September 16, 2016: Transfusion
https://www.readbyqxmd.com/read/27605851/alloimmunization-in-multitransfused-liver-disease-patients-impact-of-underlying-disease
#8
Meenu Bajpai, Shruti Gupta, Priyanka Jain
INTRODUCTION: Transfusion support is vital to the management of patients with liver diseases. Repeated transfusions are associated with many risks such as transfusion-transmitted infection, transfusion immunomodulation, and alloimmunization. MATERIALS AND METHODS: A retrospective data analysis of antibody screening and identification was done from February 2012 to February 2014 to determine the frequency and specificity of irregular red-cell antibodies in multitransfused liver disease patients...
July 2016: Asian Journal of Transfusion Science
https://www.readbyqxmd.com/read/27546234/optimal-conditions-for-the-performance-of-a-monocyte-monolayer-assay
#9
Tik Nga Tong, Emeralda Burke-Murphy, Darinka Sakac, Jacob Pendergrast, Christine Cserti-Gazdewich, Vincent Laroche, Donald R Branch
BACKGROUND: Various versions of the monocyte monolayer assay (MMA) have been used to assess clinical significance of red blood cell (RBC) alloantibodies in transfusion for more than 35 years. However, the optimal conditions, including anticoagulant used for whole blood samples, temperature and duration of storage, and optimal pH for assessing the response of monocytes to antibody-bound RBCs, have never been clearly delineated. STUDY DESIGN AND METHODS: Whole blood from healthy donors was collected in ACD, EDTA, or heparin and stored at room temperature (RT) versus 4°C for up to 2 days...
August 21, 2016: Transfusion
https://www.readbyqxmd.com/read/27527705/the-human-platelet-alloantigen-profile-in-blood-donors-from-amazonas-brazil
#10
C N Portela, A Schriefer, S R L Albuquerque, R T Perdomo, A F A Parente, S S Weber
BACKGROUND: Human platelet antigens (HPAs) are alloantigens derived from polymorphisms in platelet-surface glycoproteins. The occurrence of alloantibodies against HPAs can lead to platelet destruction and subsequent thrombocytopenia. Brazilians have a high rate of racial admixture, and the knowledge of HPA polymorphisms in particular donors from north Brazil, who have a large Amerindian influence, is a relevant strategy to prevent alloimmunisation. OBJECTIVE: Our aim was investigate the HPA allele's frequencies in the Amazonas blood donors...
August 16, 2016: Transfusion Medicine
https://www.readbyqxmd.com/read/27429523/prevalence-specificity-and-titration-of-red-cell-alloantibodies-in-multiparous-antenatal-females-at-a-tertiary-care-centre-from-north-india
#11
Meena Sidhu, Renu Bala, Naveen Akhtar, Vijay Sawhney
Screening and detection of clinically significant antibodies among antenatal women plays an important role in transfusion safety and preventing hemolytic disease of fetus and newborn. Routine screening of antenatal women for antibodies is not done in all blood centres of our country and so immunization rates are not known in pregnant women. We studied the prevalence of alloantibodies and titration of Anti D among antenatal multiparous women in Jammu region. In present prospective study, 750 antenatal multiparous women attending antenatal clinics were typed for ABO and D antigens...
September 2016: Indian Journal of Hematology & Blood Transfusion
https://www.readbyqxmd.com/read/27408414/delayed-serological-transfusion-reaction-after-platelet-transfusion-due-to-anti-e
#12
Deepti Sachan, Aswin Kumar, Dinesh Jothimani, Mohamed Rela
Delayed serological transfusion reaction (DSTR) is defined as absence of clinical signs of hemolysis and demonstration of new, clinically-significant antibodies against red blood cells after a transfusion, by either positive direct antiglobulin test or positive antibody screen with newly identified RBC alloantibody. Various delayed hemolytic transfusion reaction cases are reported after red cell transfusions. However, the incidence of DSTR after platelet transfusion due to non-Rh(D) antibodies is not much documented...
June 2016: Indian Journal of Hematology & Blood Transfusion
https://www.readbyqxmd.com/read/27365758/red-cell-alloantibodies-in-multiple-transfused-thalassaemia-patients
#13
C N Chaudhari
BACKGROUND: Thalassaemia major patients require lifelong transfusion support due to which they are prone for alloimmunization to foreign RBCs. Alloimmunization can be prevented by extended phenotype match blood transfusion. The study was conducted to know the extent of problem of alloimmunization and to find important red cell antibodies in thalassaemia patients. METHODS: A cross-sectional study was conducted. A total of 32 thalassaemia patients were enrolled. The specimen was subjected to red cell alloantibody and autoantibody by column gel agglutination technique...
January 2011: Medical Journal, Armed Forces India
https://www.readbyqxmd.com/read/27231826/transfusion-related-alloimmunization-in-children-epidemiology-and-effects-of-chemotherapy
#14
Z Solh, U Athale, D M Arnold, R J Cook, R Foley, N M Heddle
BACKGROUND & OBJECTIVES: Alloimmunization rates following red blood cell (RBC) transfusion in paediatric oncology are not known. This study aimed to: (1) describe frequency and specificity of alloantibodies in paediatric oncology patients after RBC transfusions; (2) determine the effect of chemotherapy on alloimmunization rate. MATERIALS & METHODS: Retrospective cohort study of paediatric patients at a tertiary care hospital is evaluated by two groups: control group, paediatric patients without cancer; study group, paediatric oncology patients who received chemotherapy...
October 2016: Vox Sanguinis
https://www.readbyqxmd.com/read/27144500/lung-restricted-antibodies-mediate-primary-graft-dysfunction-and-prevent-allotolerance-after-murine-lung-transplantation
#15
Ankit Bharat, Stephen Chiu, Zhikun Zheng, Haiying Sun, Anjana Yeldandi, Malcolm M DeCamp, Harris Perlman, G R Scott Budinger, Thalachallour Mohanakumar
Over one-third of lung recipients have preexisting antibodies against lung-restricted antigens: collagen (Col) type V and K-α1 tubulin (KAT). Although clinical studies have shown association of these antibodies with primary graft dysfunction (PGD), their biological significance remains unclear. We tested whether preexisting lung-restricted antibodies can mediate PGD and prevent allotolerance. A murine syngeneic (C57BL/6) or allogeneic (C57BL/6 to BALB/c) left lung transplantation model was used. Rabbit polyclonal antibodies were produced against KAT and Col-V and injected pretransplantation...
October 2016: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/27140516/interpreting-anti-hla-antibody-testing-data-a-practical-guide-for-physicians
#16
Carrie A Schinstock, Manish J Gandhi, Mark D Stegall
The development of sensitive methods for alloantibody detection has been a significant advance in clinical transplantation. However, the complexity of the data from solid phase and crossmatch assays has led to potential confusion about how to use the results for clinical decision making. The goal of this review is to provide a practical guide for transplant physicians for the interpretation of antibody data to supplement consultation with local tissue typing experts. Sources of variability in both the solid phase and crossmatch assay are discussed as are recent data regarding C1q binding antibodies and IgG subclass testing...
August 2016: Transplantation
https://www.readbyqxmd.com/read/27113001/red-blood-cell-antibodies-in-hematology-oncology-patients-interpretation-of-immunohematologic-tests-and-clinical-significance-of-detected-antibodies
#17
REVIEW
Jeanne E Hendrickson, Christopher A Tormey
Red blood cell (RBC) transfusion is a cornerstone of the management of patients with hematology/oncology disorders. However, a potentially deleterious consequence of transfusion is the development of alloantibodies against blood group antigens present on RBCs. Such alloantibodies can be an obstacle in providing compatible units for transfusion. Providers in this arena must fully understand the testing performed by blood banks, as well as the consequences of detected antibodies. This article reviews immunohematologic tests, describes how autoimmune hemolytic anemia is classified by autoantibodies; outlines RBC alloimmunization rates, and presents strategies to prevent/mitigate the impact of RBC alloimmunization...
June 2016: Hematology/oncology Clinics of North America
https://www.readbyqxmd.com/read/27061380/gene-therapy-for-immune-tolerance-induction-in-hemophilia-with-inhibitors
#18
REVIEW
V R Arruda, B J Samelson-Jones
The development of inhibitors, i.e. neutralizing alloantibodies against factor (F) VIII or FIX, is the most significant complication of protein replacement therapy for patients with hemophilia, and is associated with both increased mortality and substantial physical, psychosocial and financial morbidity. Current management, including bypassing agents to treat and prevent bleeding, and immune tolerance induction for inhibitor eradication, is suboptimal for many patients. Fortunately, there are several emerging gene therapy approaches aimed at addressing these unmet clinical needs of patients with hemophilia and inhibitors...
June 2016: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/27021079/detection-of-antileukocytic-antibodies-in-blood-serum-using-lymphocytes-and-latex-microspheres-carrying-hla-antigens-upon-alloimmunization-of-women-with-recurrent-pregnancy-loss
#19
E O Stepanova, M A Nikolaeva, E L Golubeva, V V Vtorushina, L V Van'ko, Z S Khodzhaeva, L V Krechetova
Anti-HLA-antibodies were detected using cross-reaction of blood serum with allogenic T and B cells and latex microspheres coated with HLA-I and HLA-II antigens. HLA+ and HLA-sera obtained from women before and after allogeneic immunization were tested. The results obtained by these methods significantly differed. The test with latex microspheres detected antibodies to HLA-I and HLA-II antigens with high sensitivity and specificity and can be used for assessment of clinical significance of alloantibody detection when using alloimmunization in the therapy of gestation disorders...
March 2016: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/27017954/glycosylation-pattern-of-anti-platelet-igg-is-stable-during-pregnancy-and-predicts-clinical-outcome-in-alloimmune-thrombocytopenia
#20
Myrthe E Sonneveld, Suvi Natunen, Susanna Sainio, Carolien A M Koeleman, Stephanie Holst, Gillian Dekkers, Joke Koelewijn, Jukka Partanen, C Ellen van der Schoot, Manfred Wuhrer, Gestur Vidarsson
Fetal or neonatal alloimmune thrombocytopenia (FNAIT) is a potentially life-threatening disease where fetal platelets are destroyed by maternal anti-platelet IgG alloantibodies. The clinical outcome varies from asymptomatic, to petechiae or intracranial haemorrhage, but no marker has shown reliable correlation with severity, making screening for FNAIT impractical and highly inefficient. We recently found IgG Fc-glycosylation towards platelet and red blood cell antigens to be skewed towards decreased fucosylation, increased galactosylation and sialylation...
July 2016: British Journal of Haematology
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