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Red cell alloimmunization

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https://www.readbyqxmd.com/read/29664198/hemoglobin-a-clearance-in-children-with-sickle-cell-anemia-on-chronic-transfusion-therapy
#1
Marianne E M Yee, Cassandra D Josephson, Anne M Winkler, Jennifer Webb, Naomi L C Luban, Traci Leong, Sean R Stowell, John D Roback, Ross M Fasano
BACKGROUND: Chronic transfusion therapy for sickle cell anemia reduces disease complications by diluting sickle-erythrocytes with hemoglobin A (HbA)-containing erythrocytes and suppressing erythropoiesis. Minor antigen mismatches may result in alloimmunization, but it is unknown if antigen mismatches or recipient characteristics influence HbA clearance posttransfusion. STUDY DESIGN AND METHODS: Children with sickle cell anemia on chronic transfusion therapy were followed prospectively for 12 months...
April 17, 2018: Transfusion
https://www.readbyqxmd.com/read/29624682/abo-incompatibility-and-rhig-immunoprophylaxis-protect-against-non-d-alloimmunization-by-pregnancy
#2
Carolien Zwiers, Joke M Koelewijn, Lisa Vermij, Joost van Sambeeck, Dick Oepkes, Masja de Haas, C Ellen van der Schoot
BACKGROUND: Hemolytic disease of the fetus and newborn (HDFN) is caused by maternal antibodies against fetal red blood cell antigens, most often anti-D, -K, or -c. ABO incompatibility between mother and child and anti-D immunoprophylaxis (RhIG) are known to reduce the risk of D immunization and subsequent HDFN. However, no immunoprophylaxis has been developed to prevent non-D immunizations. STUDY DESIGN AND METHODS: We evaluated whether ABO incompatibility has a preventive effect on formation of non-D alloantibodies, by performing a case-control study including pregnant women with newly detected non-D antibodies, identified within a nationwide data set, immunized during their first pregnancy and/or delivery...
April 6, 2018: Transfusion
https://www.readbyqxmd.com/read/29608322/a-review-of-in-vitro-methods-to-predict-the-clinical-significance-of-red-blood-cell-alloantibodies
#3
Sandra J Nance
This review was derived from a presentation made on September 2, 2016, for the first Academy Day presented by the Working Party on Immunohematology at the International Society of Blood Transfusion (ISBT) Congress in Dubai. The focus of this review is on the clinical significance of alloimmunization in transfusion-specifically, the parameters that contribute to a clinically significant alloantibody. The areas of focus were as follows: Introduction, Technical Aspects, and Indications and Limitations. Each section contains a brief review of selected literature and experiential knowledge...
January 2018: Immunohematology
https://www.readbyqxmd.com/read/29593460/association-of-il-6-c-572g-gene-polymorphism-with-anti-e-production
#4
Jeong-Shi Lin, Li-Hsuan Lee, Hsueng-Mei Liu, Ying-Ju Chen, Tzeon-Jye Chiou
Background: Interleukin 6 (IL-6) is involved in regulation of immunoglobulin production. The aim of this study was to investigate the association between IL-6 single nucleotide polymorphisms (SNPs) in the IL-6 promoter and anti-E in red blood cell (RBC) transfusion recipients. Methods: 50 healthy subjects, 54 patients with RBC alloantibody anti-E (responders), and 45 patients without alloantibody (non-responders) were recruited. All patients were E antigen-negative...
January 2018: Transfusion Medicine and Hemotherapy
https://www.readbyqxmd.com/read/29570817/red-blood-cell-alloimmunization-in-sickle-cell-disease-assessment-of-transfusion-protocols-during-two-time-periods
#5
Sally A Campbell-Lee, Kristina Gvozdjan, K Mia Choi, Yi-Fan Chen, Santosh L Saraf, Lewis L Hsu, Victor R Gordeuk, Ronald G Strauss, Darrell J Triulzi
BACKGROUND: Prevention of red blood cell (RBC) alloimmunization in patients with sickle cell disease (SCD) focuses on phenotypic RBC matching. We assessed alloimmunization among transfused patients with SCD after implementing leukoreduction and prophylactic antigen matching (PAM). STUDY DESIGN AND METHODS: Retrospective review of transfusion and medical records for SCD patients 18 months to 81 years of age was performed covering two 5-year periods: Period 1, no PAM, occasional leukoreduction, and Period 2, consistent leukoreduction and extended PAM (Rh, Kell, S, Fy, Jk) for patients already alloimmunized...
March 23, 2018: Transfusion
https://www.readbyqxmd.com/read/29533668/biomimetic-targeting-of-nanoparticles-to-immune-cell-subsets-via-cognate-antigen-interactions
#6
Brian Luk, Yao Jiang, Jonathan Copp, Che-Ming J Hu, Nishta Krishnan, Weiwei Gao, Shulin Li, Ronnie H Fang, Liangfang Zhang
Within the body, cellular recognition is mediated in large part by receptor-ligand interactions that result from the surface marker expression of the participant cells. In the case of immune cells, these interactions can be highly specific, enabling them to carry out their protective functions in fighting off infection and malignancy. In this work, we demonstrate the biomimetic targeting of antigen-specific immune cell populations by using nanoparticles functionalized with natural membrane derived from cells expressing the cognate antigen...
March 13, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29512164/maternal-red-blood-cell-alloimmunization-requiring-intrauterine-transfusion-a-comparative-study-on-management-and-outcome-depending-on-the-type-of-antibody
#7
Thanh-Vy Phung, Véronique Houfflin-Debarge, Nassima Ramdane, Louise Ghesquière, Anne Delsalle, Capucine Coulon, Damien Subtil, Pascal Vaast, Charles Garabedian
BACKGROUND: The antibody primarily responsible for fetal anemia may influence treatment and prognosis. The primary objective was to compare ante- and postnatal management and the outcomes of maternal red blood cell (RBC) alloimmunizations according to the antibody involved. The secondary objective was to compare anti-D alloimmunizations according to associated number of antibodies. STUDY DESIGN AND METHODS: A single-center study from 1999 to 2015 including maternal RBC alloimmunizations requiring intrauterine transfusion (IUT) was conducted...
March 6, 2018: Transfusion
https://www.readbyqxmd.com/read/29504337/red-cell-alloimmunization-in-multitransfused-thalassaemia-major-patients
#8
Shazia Moeen, Nazish Farooq, Romana Irshad, Muhammad Ashfaq, Umer Farooq, Muhammad Idris
BACKGROUND: Lifelong transfusions are life savers for thalassaemia patients but are associated with many complications. Alloimmunization is a major problem for blood banks. Antigens of foreign red blood cells induce the formation of antibodies in patients suffering from thalassaemia. The purpose of this study was to examine the frequency of red cell alloantibodies and to express the type of these antibodies in thalassaemia patients. METHODS: Patients that have received multiple transfusions were included in this study...
January 2018: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/29478960/platelet-component-transfusion-and-alloimmunization-where-do-we-stand
#9
P Moncharmont
Platelet transfusion in patients, particularly in onco-haematology, is frequent and can become chronic in some cases. Post-transfusion alloimmunization is often seen, in practice. The risk of this is significantly improved in multitransfused patients. Several classes of antigens binding on platelets (HLA and HPA) are involved and also red blood cell antigens (residual red blood cells in platelet concentrates). Platelet alloimmunization causes a poor transfusion response, refractoriness and, more rarely, post-transfusion purpura...
February 22, 2018: Transfusion Clinique et Biologique: Journal de la Société Française de Transfusion Sanguine
https://www.readbyqxmd.com/read/29476829/management-of-red-blood-cell-alloimmunization-in-pregnancy
#10
REVIEW
L Ghesquière, C Garabedian, C Coulon, P Verpillat, T Rakza, B Wibaut, A Delsalle, D Subtil, P Vaast, V Debarge
The main cause of fetal anemia is maternal red blood cell alloimmunization (AI). The search of maternal antibodies by indirect antiglobulin test allows screening for AI during pregnancy. In case of AI, fetal genotyping (for Rh-D, Rh-c, Rh-E and Kell), quantification (for anti-rhesus antibodies) and antibody titration, as well as ultrasound monitoring, are performed. This surveillance aims at screening for severe anemia before hydrops fetalis occurs. Management of severe anemia is based on intrauterine transfusion (IUT) or labor induction depending on gestational age...
February 21, 2018: Journal of gynecology obstetrics and human reproduction
https://www.readbyqxmd.com/read/29469208/molecular-characterization-and-multidisciplinary-management-of-gerbich-hemolytic-disease-of-the-newborn
#11
Rebecca N Levitt, Elise Gourri, Christoph Gassner, Grace Banez-Sese, Abdus Salam, Gregory A Denomme, Elizabeth Yang
Gerbich (Ge) antigens are high frequency red cell antigens expressed on glycophorin C (GYPC) and glycophorin D. Hemolytic disease of the fetus and newborn (HDFN) due to Gerbich antibody is rare and presents a clinical challenge, as Gerbich negative blood is scarce. We report a case of HDFN due to maternal Ge3 negative phenotype and anti-Ge3 alloimmunization, successfully managed by transfusion of maternal blood. Molecular testing revealed that the mother has homozygous deletion of exon 3 of GYPC, the father is homozygous wildtype for GYPC, and the infant is obligate heterozygote expressing Ge3...
February 22, 2018: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/29441590/the-prevalence-immunogenicity-and-evanescence-of-alloantibodies-to-mut-and-mur-antigens-of-gp-mur-red-blood-cells-in-a-southeast-asian-patient-cohort
#12
Veera Sekaran Nadarajan
BACKGROUND: Antibodies to Mi a , MUT, and Mur are among the most frequently identified alloantibodies in Southeast Asia. Understanding the characteristics of these antibodies in terms of induction and evanescence would aid in optimizing methods for their detection. STUDY DESIGN AND METHODS: Antibody testing results between the years 2013 and 2015 with relevant patient demographic data and red blood cell (RBC) transfusion history were retrieved. Cumulative alloimmunization incidence and evanescence to MUT and Mur were estimated by Kaplan-Meier analysis in relation to the number of RBC units transfused and time...
February 13, 2018: Transfusion
https://www.readbyqxmd.com/read/29399805/risks-of-red-blood-cell-alloimmunization-in-transfusion-dependent-%C3%AE-thalassemia-in-oman-a-25-year-experience-of-a-university-tertiary-care-reference-center-and-a-literature-review
#13
Arwa Z Al-Riyami, Ayman Al-Muqbali, Saif Al-Sudiri, Sathiya Murthi Panchatcharam, Mathew Zacharia, Sabah Al-Mahrooqi, Saif Al-Hosni, Ali Al-Marhoobi, Shahina Daar
BACKGROUND: β-Thalassemia is a common hemoglobinopathy in the Arabian Peninsula. Red blood cell (RBC) transfusion is a cornerstone for its management, but can create significant challenges including RBC alloimmunization. Herein, we examine alloimmunization risk factors in Omani patients with transfusion-dependent β-thalassemia. Existing literature is summarized. STUDY DESIGN AND METHODS: A retrospective review of all patients attending our center over 25 years was performed...
February 4, 2018: Transfusion
https://www.readbyqxmd.com/read/29378146/anti-vel-alloimmunization-and-severe-hemolytic-disease-of-the-fetus-and-newborn
#14
Kenneth J Moise, Yisel Morales, Marsha F Bertholf, Susan N Rossmann, Yu Bai
Only rare cases of anti-Vel-associated mild-to-moderate hemolytic disease of the fetus and newborn have been previously reported. No case of fetal anemia requiring prenatal therapy has been noted to date. We report such a case recently encountered at our Fetal Center. Strategies are discussed for managing pregnancy complicated with alloimmunization to an antibody to a high-prevalence antigen, including sources of red blood cells for intrauterine transfusions.
December 2017: Immunohematology
https://www.readbyqxmd.com/read/29377292/glucose-6-phosphate-dehydrogenase-deficient-red-blood-cell-units-are-associated-with-decreased-posttransfusion-red-blood-cell-survival-in-children-with-sickle-cell-disease
#15
Eyal Sagiv, Ross M Fasano, Naomi L C Luban, Cassandra D Josephson, Sean R Stowell, John D Roback, Richard O Francis, Marianne E M Yee
Chronic transfusion therapy (CTT) for sickle cell disease (SCD) reduces disease morbidity by suppressing the amount of circulating hemoglobin S (HbS)-containing red blood cells (RBC). The effectiveness of CTT depends on the rate of RBC clearance. Glucose-6-phosphate dehydrogenase (G6PD) deficient donor RBC may exhibit increased hemolysis, but it is unknown if transfusion of these units results in less effective transfusion outcomes in SCD. Children with SCD on CTT were followed prospectively for multiple transfusions...
January 27, 2018: American Journal of Hematology
https://www.readbyqxmd.com/read/29365318/recipient-priming-to-one-rbc-alloantigen-directly-enhances-subsequent-alloimmunization-in-mice
#16
Seema R Patel, Ashley Bennett, Kathryn Girard-Pierce, Cheryl L Maier, Satheesh Chonat, Connie M Arthur, Patricia E Zerra, Amanda Mener, Sean R Stowell
Individuals that become immunized to red blood cell (RBC) alloantigens can experience an increased rate of antibody formation to additional RBC alloantigens following subsequent transfusion. Despite this, how an immune response to one RBC immunogen may impact subsequent alloimmunization to a completely different RBC alloantigen remains unknown. Our studies demonstrate that Kell blood group antigen (KEL) RBC transfusion in the presence of inflammation induced by poly (I:C) (PIC) not only enhances anti-KEL antibody production through a CD4+ T-cell-dependent process but also directly facilitates anti-HOD antibody formation following subsequent exposure to the disparate HOD (hen egg lysozyme, ovalbumin, fused to human blood group antigen Duffy b) antigen...
January 23, 2018: Blood Advances
https://www.readbyqxmd.com/read/29337843/evaluation-of-a-decision-tree-for-efficient-antenatal-red-blood-cell-antibody-screening
#17
Isabelle Le Ray, Brian Lee, Agneta Wikman, Marie Reilly
BACKGROUND: Hemolytic disease of the fetus and newborn due to maternal red blood cell alloimmunization can have serious consequences. Because early detection enables careful monitoring of affected pregnancies, programs to routinely screen all pregnant women have been widely adopted. Due to the low prevalence of alloimmunization, these require large investments of resources to detect a small number of cases. METHODS: We conducted a validation study of a decision tree developed in the Netherlands for determining whether to screen for alloimmunization...
May 2018: Epidemiology
https://www.readbyqxmd.com/read/29296782/whole-exome-sequencing-for-rh-genotyping-and-alloimmunization-risk-in-children-with-sickle-cell-anemia
#18
Stella T Chou, Jonathan M Flanagan, Sunitha Vege, Naomi L C Luban, R Clark Brown, Russell E Ware, Connie M Westhoff
RH genes are highly polymorphic and encode the most complex of the 35 human blood group systems. This genetic diversity contributes to Rh alloimmunization in patients with sickle cell anemia (SCA) and is not avoided by serologic Rh-matched red cell transfusions. Standard serologic testing does not distinguish variant Rh antigens. Single nucleotide polymorphism (SNP)-based DNA arrays detect many RHD and RHCE variants, but the number of alleles tested is limited. We explored a next-generation sequencing (NGS) approach using whole-exome sequencing (WES) in 27 Rh alloimmunized and 27 matched non-alloimmunized patients with SCA who received chronic red cell transfusions and were enrolled in a multicenter study...
August 8, 2017: Blood Advances
https://www.readbyqxmd.com/read/29296731/human-and-murine-splenic-neutrophils-are-potent-phagocytes-of-igg-opsonized-red-blood-cells
#19
Sanne M Meinderts, Per-Arne Oldenborg, Boukje M Beuger, Thomas R L Klei, Johanna Johansson, Taco W Kuijpers, Takashi Matozaki, Elise J Huisman, Masja de Haas, Timo K van den Berg, Robin van Bruggen
Red blood cell (RBC) clearance is known to occur primarily in the spleen, and is presumed to be executed by red pulp macrophages. Erythrophagocytosis in the spleen takes place as part of the homeostatic turnover of RBCs to remove old RBCs. It can be strongly promoted by immunoglobulin G (IgG) opsonization of RBCs, a condition that can occur as a consequence of autoantibody or alloantibody formation. The purpose of our study was to investigate which phagocytes are involved in IgG-mediated RBC clearance in the human spleen...
June 13, 2017: Blood Advances
https://www.readbyqxmd.com/read/29280988/induced-pluripotent-stem-cell-derived-red-blood-cells-and-platelet-concentrates-from-bench-to-bedside
#20
REVIEW
Daniele Focosi, Giovanni Amabile
Red blood cells and platelets are anucleate blood components indispensable for oxygen delivery and hemostasis, respectively. Derivation of these blood elements from induced pluripotent stem (iPS) cells has the potential to develop blood donor-independent and genetic manipulation-prone products to complement or replace current transfusion banking, also minimizing the risk of alloimmunization. While the production of erythrocytes from iPS cells has challenges to overcome, such as differentiation into adult-type phenotype that functions properly after transfusion, platelet products are qualitatively and quantitatively approaching a clinically-applicable level owing to advances in expandable megakaryocyte (MK) lines, platelet-producing bioreactors, and novel reagents...
December 27, 2017: Cells
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