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Immunohematology

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https://www.readbyqxmd.com/read/29043831/del-phenotype
#1
Dong H Kwon, S G Sandler, Willy A Flegel
DEL red blood cells (RBCs) type as D- by routine serologic methods and are transfused routinely, without being identified as expressing a very weak D antigen, to D- recipients. DEL RBCs are detected only by adsorption and elution of anti-D or by molecular methods. Most DEL phenotypes have been reported in population studies conducted in East Asia, although DEL phenotypes have been detected also among Caucasian individuals. Approximately 98 percent of DEL phenotypes in East Asians are associated with the RHD*DEL1 or RHD*01EL...
September 2017: Immunohematology
https://www.readbyqxmd.com/read/29043830/red-blood-cell-phenotype-prevalence-in-blood-donors-who-self-identify-as-hispanic
#2
Chelsea A Sheppard, Nicole L Bolen, Beth Eades, Gorka Ochoa-Garay, Mark H Yazer
Molecular genotyping platforms provide a quick, high-throughput method for identifying red blood cell units for patients on extended phenotype-matching protocols, such as those with sickle cell disease or thalassemia. Most of the antigen prevalence data reported are for non-Hispanic populations. Therefore, this study sought to determine the phenotype prevalence in a single blood center's Hispanic population and to compare those results with previously reported rates in non-Hispanic donor populations. We performed a retrospective review of all serologic and molecular typing from donors who self-reported as Hispanic...
September 2017: Immunohematology
https://www.readbyqxmd.com/read/29043829/postpartum-acute-hemolytic-transfusion-reactions-associated-with-anti-lea-in-two-pregnancies-complicated-by-preeclampsia
#3
Marcia Marchese
Lewis blood group antibodies, which are mostly naturally occurring and considered clinically insignificant, have rarely been documented as a cause of acute hemolytic transfusion reactions (AHTRs). This report presents two cases of AHTRs caused by anti-Lea occurring in postpartum black females (one group B, one group AB) whose pregnancies were complicated by preeclampsia. Neither anti-Lea was detected by automated solid-phase red cell adherence technology in pre-transfusion testing. Therefore, red blood cell units, compatible by electronic crossmatch, were issued and transfused...
September 2017: Immunohematology
https://www.readbyqxmd.com/read/29043828/a-lu-16-individual-with-antibodies
#4
Carole Éthier, Cynthia Parent, Anne-Sophie Lemay, Nadia Baillargeon, Geneviève Laflamme, Josée Lavoie, Josée Perreault, Maryse St-Louis
Antibodies against Lutheran blood group antigens have been observed during first-time pregnancy. Samples from a woman of African descent were tested in our immunohematology laboratory on several occasions since 2001. Her samples were phenotyped as Lu(a+b-), and anti-Lub was suspected but not identified. She was asked to make autologous donations in preparation for her delivery, which she did. In 2010, two antibodies were identified: anti-Lea and -Lub. Six years later, a third investigation was requested. This time, an antibody directed at a high-prevalence Lutheran antigen was found in addition to the anti-Lea and -Lub previously observed...
September 2017: Immunohematology
https://www.readbyqxmd.com/read/29043827/stability-guidelines-for-dithiothreitol-treated-red-blood-cell-reagents-used-for-antibody-detection-methods-in-patients-treated-with-daratumumab
#5
Wendy L Disbro
Daratumumab (DARA), a drug used to treat patients with multiple myeloma, causes interference in pre-transfusion testing. Samples from patients receiving DARA exhibit panreactivity in antibody detection and identification tests with red blood cells (RBCs). Many hospitals are sending these samples to reference laboratories. Dithiothreitol (DTT), a sulfhydryl chemical treatment of RBCs, negates this reactivity. This study investigated the stability of the antigens on DTT-treated RBCs to determine if large quantities of RBCs could be treated at one time, stored, and used for testing at a later time...
September 2017: Immunohematology
https://www.readbyqxmd.com/read/29043826/abo-serology-in-a-case-of-persistent-weak-a-in-a-recipient-following-a-group-o-matched-unrelated-bone-marrow-transplant
#6
Dianne E Grey, Elizabeth A Fong, Catherine Cole, Jesper Jensen, Jill Finlayson
HLA-matched hematopoietic stem cell transplantation (HSCT) from red blood cell (RBC)-incompatible donors is not uncommon. The engraftment process following ABO-incompatible allogeneic HSCT results in the transition from patient blood group to donor blood group in the recipient. In contrast, most non-hematopoietic tissues retain expression of the patient's original blood group for life, and these antigens may adsorb from the plasma onto the donor-derived RBCs. Correct serologic interpretation of the ABO blood group during this engraftment process can be difficult...
September 2017: Immunohematology
https://www.readbyqxmd.com/read/28657768/bloody-brilliant-a-history-of-blood-groups-and-blood-groupers
#7
S G Sandler
What a joy and privilege to read and reread this unique and extraordinarily informative history for this review! Pierce and Reid have authored a 633-page, 28-chapter tome, containing 796 illustrations, including photographs of individual contributors to the field of blood group serology, as well as group photographs of landmark meetings and conferences held during the past 100 years. The Index lists the names of 1046 individuals who are acknowledged as contributors to the history of blood group serology, many of whom are the subject of cameo biographies...
June 2017: Immunohematology
https://www.readbyqxmd.com/read/28657767/recognizing-and-resolving-abo-discrepancies
#8
Geralyn M Meny
Patient samples are routinely typed for ABO prior to transfusion. Determining the ABO group requires both red blood cell (RBC) antigen typing for A and B (forward type) and testing for anti-A and anti-B in the plasma (reverse type). An ABO discrepancy exists when the result of an ABO RBC typing, or forward type, does not agree with the result of the plasma typing, or reverse type. This brief review examines several causes of ABO discrepancies encountered in the clinical transfusion service. Options for resolving these discrepancies are presented, including a discussion of which discrepancies should be resolved using molecular testing...
June 2017: Immunohematology
https://www.readbyqxmd.com/read/28657766/a-suspected-delayed-hemolytic-transfusion-reaction-mediated-by-anti-joa
#9
Ryan P Jajosky, Wendy C Lumm, Scott C Wise, Roni J Bollag, James F Shikle
A 32-year-old African-American woman with a history of sickle cell disease presented for surgical evaluation of left total hip arthroplasty due to avascular necrosis of the femoral head. In anticipation of a complex orthopedic procedure, pre-surgical blood work was ordered. The patient's Fenwal blood sample typed as group O, D+. Although the patient had a history of anti-Fya, the antibody identification was inconclusive, so the workup was sent to a reference laboratory. The patient was last transfused with red blood cells (RBCs) 2 years earlier, but had no history of transfusion reactions...
June 2017: Immunohematology
https://www.readbyqxmd.com/read/28657765/the-fors-awakens-review-of-a-blood-group-system-reborn
#10
Annika K Hult, Martin L Olsson
The presence of the FORS1 antigen on red blood cells was discovered relatively recently, and in 2012, the International Society of Blood Transfusion (ISBT) acknowledged FORS as blood group system number 031. This rare antigen is carried by a glycosphingolipid and formed by elongation of the P antigen. Most people have naturally occurring anti-FORS1 in their plasma. The clinical significance of these antibodies is unknown in the transfusion setting, but they can hemolyze FORS1+ erythrocytes in the presence of complement in vitro...
June 2017: Immunohematology
https://www.readbyqxmd.com/read/28657764/two-cases-of-the-variant-rhd-dau5-allele-associated-with-maternal-alloanti-d
#11
Jennifer A Duncan, Susan Nahirniak, Rodrigo Onell, Gwen Clarke
Rh is a complex blood group system with diverse genotypes that may encode weak and partial D variants. Standard serologic analysis may identify clinically significant D variants as D+; nevertheless, individuals with these D variants should be managed as D- patients to prevent antibody formation to absent D epitopes. Variant identification is necessary during pregnancy to allow for timely and appropriate Rh immune globulin (RhIG) prophylaxis for hemolytic disease of the fetus and newborn (HDFN) as D alloimmunization can occur with some D variants...
June 2017: Immunohematology
https://www.readbyqxmd.com/read/28657763/the-vel-blood-group-system-a-review
#12
Jill R Storry, Thierry Peyrard
The blood group antigen Vel has been one of immunohematology's greatest enigmas: the variation in antigen strength from one individual to another, the property of anti-Vel to readily hemolyze Vel+ red blood cells (RBCs), and the difficulty to screen for sufficient numbers of Vel- blood donors had made Vel a tough nut to crack. In 2013, a small, previously unknown protein called small integral membrane protein 1 (SMIM1) was identified on the RBC by three independent research groups using different approaches, and all three groups demonstrated that Vel- RBCs lacked SMIM1...
June 2017: Immunohematology
https://www.readbyqxmd.com/read/28657762/hematologic-complications-in-a-patient-with-glycine-soja-polyagglutination-following-fresh-frozen-plasma-transfusion
#13
Ryan P Jajosky, Lloyd O Cook, Elizabeth Manaloor, James F Shikle, Roni J Bollag
Polyagglutination is a rare and underdiagnosed condition, characterized by agglutination of red blood cells(RBCs) with almost all ABO-compatible adult sera. Polyagglutination can occur when a cryptantigen is exposed on RBCs via microbial enzyme activity. Becausenearly all adults naturally produce antibodies against cryptantigens, transfusion of plasma can cause unexpected hemolysis and hematologic complications, such as thrombocytopenia and disseminated intravascular coagulation, in patients whose cryptantigens are exposed...
June 2017: Immunohematology
https://www.readbyqxmd.com/read/28425753/applications-of-selected-cells-in-immunohematology-in-a-developing-country-case-studies
#14
Ravi C Dara, Aseem K Tiwari, Dinesh Arora, Subhasis Mitra, Geet Aggarwal, Devi P Acharya, Gunjan Bhardwaj
When an antibody is detected, its specificity should be determined and its likely clinical significance should be assessed. When one antibody has been identified, it becomes necessary to confirm the presence of additional significant antibodies to ensure that compatible blood is provided to the patient. To perform this confirmation, specific reagent red blood cells (RBCs) are selected; these are called selected cells. Though the most common use of selected cells is for antibody confirmation, they can also be used for several other immunohematologic applications...
January 2017: Immunohematology
https://www.readbyqxmd.com/read/28425752/use-of-standard-laboratory-methods-to-obviate-routine-dithiothreitol-treatment-of-blood-samples-with-daratumumab-interference
#15
Nicholas J Lintel, Debra K Brown, Diane T Schafer, Farai M Tsimba-Chitsva, Scott A Koepsell, Sara M Shunkwiler
Daratumumab is an antibody currently used in the treatment of patients with refractory multiple myeloma. Blood samples from patients being treated with daratumumab may show panreactivity during pre-transfusion testing. To facilitate the provision of blood components for such patients, it is recommended that a baseline phenotype or genotype be established prior to starting treatment with daratumumab. If patient red blood cells (RBCs) require phenotyping after the start of daratumumab treatment, dithiothreitol (DTT) treatment of the patient's RBCs should be performed...
January 2017: Immunohematology
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
#16
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
#17
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
#18
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/28425748/a-field-analysis-trial-comparing-the-turnaround-times-of-routine-and-stat-red-blood-cell-immunohematology-testing
#19
COMPARATIVE STUDY
Katie Sackett, Andrea Kjell, Abigail M Schneider, Claudia S Cohn
The turnaround time (TAT) for pre-transfusion testing is important for prompt clinical decision-making. TAT includes the time between the arrival of the sample and the initiation of testing, plus the processing time (PT) required to generate and report a result. The TAT in larger blood banks is mostly dependent upon the capability of the analyzer used. In smaller blood banks, where manual work is often performed, the TAT is dependent on availability and experience of staff, testing resources, and workload. Our site performed a comparative analysis of the ORTHO VISION® (Ortho Clinical Diagnostics, Raritan, NJ) and the Echo® (Immucor, Norcross, GA) blood bank analyzers, using the TAT and PT of standard blood bank tests as the outcome metrics...
January 2017: Immunohematology
https://www.readbyqxmd.com/read/28257231/trends-of-abo-and-rh-phenotypes-in-transfusion-dependent-patients-in-pakistan
#20
Nida Anwar, Munira Borhany, Saqib Ansari, Sana Khurram, Uzma Zaidi, Imran Naseer, Muhammad Nadeem, Tahir Shamsi
No abstract text is available yet for this article.
December 2016: Immunohematology
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