1
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Yee MEM, Zerra PE, McCoy JW, Covington ML, Stowell SR, Joiner CH, Lough CM, Delvadia BB, Josephson CD, Roback JD, Fasano RM. Post-transfusion biotin-labeled red blood cell survival studies in pediatric sickle cell disease with antibodies of uncertain significance. Transfusion 2024; 64:800-807. [PMID: 38506450 PMCID: PMC11088511 DOI: 10.1111/trf.17800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 03/06/2024] [Accepted: 03/08/2024] [Indexed: 03/21/2024]
Abstract
BACKGROUND Red blood cell (RBC) antibodies are common in multiply transfused patients with sickle cell disease (SCD). Unlike RBC alloantibodies, the potential of autoantibodies to cause post-transfusion hemolysis may be uncertain. Biotin-labeling provides a direct measurement of red cell survival (RCS) over time, thus can be used to assess the clinical significance of RBC antibodies. Antibodies to biotinylated RBC (B-RBC) occasionally are detected after exposure, which may impact B-RBC survival in subsequent RCS studies. STUDY DESIGN AND METHODS Pediatric patients with SCD receiving monthly chronic transfusions underwent RCS studies, receiving aliquots of allogeneic RBC labeled at distinct densities of biotin (2-18 μg/mL). B-RBC survival was followed for 4 months post-transfusion, and B-RBC antibody screening for 6 months. Patients with warm autoantibodies (WAA) or B-RBC antibodies are reported here. RESULTS RBC antibodies were detected during RCS in four patients: one with WAA, one with WAA followed by B-RBC-specific antibodies, and two with transient B-RBC antibodies within the first 5 weeks of exposure. B-RBC half-lives (T50) ranged 37.6-61.7 days (mean 47.8 days). There was no evidence of increased hemolysis or accelerated B-RBC clearance in the presence of WAA or B-RBC antibodies. DISCUSSION Biotinylation of allogenic RBC can be used to assess the possible effects of RBC antibodies on transfusion survival in individual cases, particularly when it is uncertain if the detected antibodies may result in hemolysis. In the cases presented here, neither WAA nor B-RBC antibodies were associated with significant shortening of B-RBC survival in individuals with SCD.
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Affiliation(s)
- Marianne E M Yee
- Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, Atlanta, Georgia, USA
- Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Patricia E Zerra
- Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, Atlanta, Georgia, USA
- Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, USA
- Center for Transfusion and Cellular Therapies, Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - James W McCoy
- Center for Transfusion and Cellular Therapies, Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Mischa L Covington
- Joint Program in Transfusion Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Sean R Stowell
- Joint Program in Transfusion Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Clinton H Joiner
- Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, Atlanta, Georgia, USA
- Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Christopher M Lough
- Medical Services, Lifesouth Community Blood Centers, Gainesville, Florida, USA
| | | | - Cassandra D Josephson
- Cancer and Blood Disorders Institute, Johns Hopkins All Children's Hospital, St. Petersburg, Florida, USA
- Departments of Oncology and Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - John D Roback
- Center for Transfusion and Cellular Therapies, Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Ross M Fasano
- Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, Atlanta, Georgia, USA
- Center for Transfusion and Cellular Therapies, Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
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2
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Ames P, Baal N, Speckmann M, Michel G, Ratke J, Klesser C, Cooper N, Takahashi D, Bayat B, Bein G, Santoso S. In vitro analysis of anti-HPA-1a dependent platelet phagocytosis and its inhibition using a new whole blood phagocytosis assay (WHOPPA). Front Immunol 2023; 14:1283704. [PMID: 38077345 PMCID: PMC10702767 DOI: 10.3389/fimmu.2023.1283704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 10/30/2023] [Indexed: 12/18/2023] Open
Abstract
Fetal and neonatal alloimmune thrombocytopenia (FNAIT) is a serious bleeding condition mostly caused by the reaction between maternal anti-HPA-1a antibodies and fetal platelets. This reaction leads to Fc-dependent platelet phagocytosis. Although several serological methods have been developed to identify maternal antibodies, a reliable laboratory parameter as a prognostic tool for FNAIT severity is still lacking. In this study, we developed whole blood platelet phagocytosis assay (WHOPPA), a flow cytometry-based phagocytosis assay that uses a pH-sensitive fluorescent dye (pHrodo-SE) to analyze anti-HPA-1a-dependent platelet phagocytosis in whole blood. WHOPPA revealed a high phagocytosis rate for the anti-HPA-1a opsonized platelets by monocytes but not by neutrophils. Analysis of different monocyte populations showed that all monocyte subsets, including classical (CD14++CD16-), intermediate (CD14++CD16+), and nonclassical (CD14+CD16++) monocytes, were able to engulf opsonized platelets. A unique monocyte subset, termed shifted monocytes (CD14+CD16-), showed the highest phagocytosis rate and was detected after platelet engulfment. FcγR inhibition tests revealed that except for FcγRIIa, FcγRI and FcγRIII on monocytes were responsible for the phagocytosis of anti-HPA-1a opsonized platelets. Analysis of anti-HPA-1a antibodies from FNAIT cases (n = 7) showed the phagocytosis of HPA-1aa but not of HPA-1bb platelets by monocytes. The phagocytosis rate was highly correlated with bound antibodies measured by flow cytometry (p < 0001; r = 0.9214) and MAIPA assay (p < 0.001; r = 0.7692). The phagocytosis rates were equal for type I and II anti-HPA-1a antibodies recognizing the plexin-semaphoring-integrin (PSI) domain and PSI/epidermal growth factor 1 domain of β3 integrin, respectively. By contrast, type III anti-HPA-1a antibodies reacting with αvβ3 integrin did not induce platelet phagocytosis. Furthermore, effector-silenced mAbs against HPA-1a inhibited the phagocytosis of anti-HPA-1a opsonized platelets. In conclusion, WHOPPA is a reliable in vitro platelet phagocytosis assay that mimics the phagocytosis of anti-HPA-1a opsonized platelets in whole blood. This assay allows to prove platelet phagocytosis ex vivo and evaluate the inhibitory capacity of different inhibitors as therapeutically strategies for the prevention of fetal thrombocytopenia in FNAIT in the future.
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Affiliation(s)
- Paula Ames
- Institute for Clinical Immunology, Transfusion Medicine and Hemostasis, Justus Liebig University, Giessen, Germany
| | - Nelli Baal
- Institute for Clinical Immunology, Transfusion Medicine and Hemostasis, Justus Liebig University, Giessen, Germany
| | - Martin Speckmann
- Institute for Clinical Immunology, Transfusion Medicine and Hemostasis, Justus Liebig University, Giessen, Germany
- Flow Cytometry Core Facility, Justus Liebig University, Giessen, Germany
| | - Gabriela Michel
- Institute for Clinical Immunology, Transfusion Medicine and Hemostasis, Justus Liebig University, Giessen, Germany
| | - Judith Ratke
- Institute for Clinical Immunology, Transfusion Medicine and Hemostasis, Justus Liebig University, Giessen, Germany
| | - Christina Klesser
- Institute for Clinical Immunology, Transfusion Medicine and Hemostasis, Justus Liebig University, Giessen, Germany
| | - Nina Cooper
- Institute for Clinical Immunology, Transfusion Medicine and Hemostasis, Justus Liebig University, Giessen, Germany
| | | | - Behnaz Bayat
- Institute for Clinical Immunology, Transfusion Medicine and Hemostasis, Justus Liebig University, Giessen, Germany
| | - Gregor Bein
- Institute for Clinical Immunology, Transfusion Medicine and Hemostasis, Justus Liebig University, Giessen, Germany
| | - Sentot Santoso
- Institute for Clinical Immunology, Transfusion Medicine and Hemostasis, Justus Liebig University, Giessen, Germany
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3
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Datta SS, Sil S, Mandal S. Rare blood group registry in India-current challenges and future perspectives. Front Genet 2023; 14:1264853. [PMID: 37779913 PMCID: PMC10535088 DOI: 10.3389/fgene.2023.1264853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 09/01/2023] [Indexed: 10/03/2023] Open
Abstract
Patients who require blood from rare blood group donors present great challenges even to the most advanced healthcare delivery system. It is most challenging to supply blood for a patient with an antibody to an antigen of high prevalence. The blood donor lacking the corresponding antigen would have an occurrence rate of less than one in 1,000. The International Rare Donor Panel was established in 1965, but since then there has been gross underrepresentation of South Asian countries, including India. There are several challenges to starting a rare blood group donor program in India that include technical, logistical, and administrative limitations. But the main limiting factors are poor availability of trained resources, lack of awareness, absence of antibody screening, inadequate number of laboratories with blood group genotyping facilities, and the decentralized nature of blood transfusion services. Despite that, there were several rare blood groups identified by Indian immunohematologists in the recent past. Recently, a transfusion genomic group has been established in collaboration with the clinical transfusion medicine specialists in India under the GUaRDIAN (Genomics for Understanding Rare Disease in India Alliance Network) initiative to address the domain of rare blood group genomics. Similarly, the National Institute of Immunohematology, Mumbai under the directive of the ICMR (Indian Council of Medical Research) has taken a step to start the RDRI (Rare Donor Registry of India). In this context, we explore the current challenges of setting-up a rare blood group registry in India and future goals from a developing nation's perspective.
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Affiliation(s)
| | - Suhasini Sil
- Department of Transfusion Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Saikat Mandal
- Young Professional Council, International Society of Blood Transfusion, Amsterdam, Netherlands
- Medical Oncology, Hull York Medical School, Hull, United Kingdom
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4
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Sandhu G, Lipman T, Bodnar M, Bienz MN, Branch DR. Significant rosettes observed in monocyte monolayer assay due to complement-binding antibodies. Transfusion 2023. [PMID: 37114749 DOI: 10.1111/trf.17384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 04/04/2023] [Accepted: 04/10/2023] [Indexed: 04/29/2023]
Affiliation(s)
- Gurleen Sandhu
- Centre for Innovation, Canadian Blood Services, Toronto, Ontario, Canada
| | - Tatiana Lipman
- Centre for Innovation, Canadian Blood Services, Toronto, Ontario, Canada
| | - Melanie Bodnar
- Medical Laboratory and Stem Cell Services, Canadian Blood Services, Edmonton, Alberta, Canada
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - Marc Nicolas Bienz
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Donald R Branch
- Centre for Innovation, Canadian Blood Services, Toronto, Ontario, Canada
- Department of Medicine, University of Toronto, Toronto, Ontario, Canada
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5
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Laureano M, Clarke G, Yan MTS. How do I provide rare red cells to patients? Transfusion 2023; 63:670-678. [PMID: 36310505 DOI: 10.1111/trf.17171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 10/06/2022] [Accepted: 10/07/2022] [Indexed: 04/12/2023]
Abstract
BACKGROUND The demand for rare blood is expected to increase in Canada as its population continues to expand through immigration from diverse regions of the world. MATERIAL AND METHODS This paper outlines a national approach to providing rare red cells for patients through the Rare Blood Program of Canadian Blood Services (CBS). Data detailing the rare red cell requests and inventory managed by CBS' Rare Blood Program is provided. RESULTS The provision of rare red cells involves multiple considerations such as multidisciplinary communication, serologic/molecular confirmation, donor recruitment, inventory optimization and logistical factors. CONCLUSION The description of CBS' Rare Blood Program will inform others that seek to create, optimize, or expand programs that facilitate the provision of rare blood. New technologies such as next-generation sequencing may also affect how rare donors are identified and recruited in the future.
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Affiliation(s)
- Marissa Laureano
- Medical Affairs and Innovation, Canadian Blood Services, Ottawa, Ontario, Canada
- Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Gwen Clarke
- Medical Affairs and Innovation, Canadian Blood Services, Ottawa, Ontario, Canada
- Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - Matthew T S Yan
- Medical Affairs and Innovation, Canadian Blood Services, Ottawa, Ontario, Canada
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
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6
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Tran A, Yan MTS, Branch DR, Blacquiere M, Pineault N, Pasha R, Clarke G. Severe fetal anemia caused by anti-Jr a : Burst forming unit-erythroid colony formation inhibition assay suggesting possible erythroid suppression mechanism. Transfusion 2023; 63:877-882. [PMID: 36727643 DOI: 10.1111/trf.17265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 01/07/2023] [Accepted: 01/09/2023] [Indexed: 02/03/2023]
Abstract
BACKGROUND The Jr blood group system includes a single, high-prevalence antigen, Jra , encoded by the ABCG2 gene. The impact of anti-Jra in pregnancy is variable, ranging from no clinical effect to severe anemia including some fetal deaths. Case reports have postulated that anti-Jra mediated fetal anemia is poorly hemolytic, suggesting other mechanisms of anemia may be involved. STUDY DESIGN AND METHODS We describe the case of severe anti-Jra mediated fetal anemia. At Canadian Blood Services laboratories, maternal anti-Jra was tested for phagocytic activity via a monocyte monolayer assay (MMA) and erythroid suppression via inhibition of burst forming unit-erythroid (BFU-E) colony formation assays. The New York Blood Center sequenced exons 4 and 7 of the ABCG2 gene. RESULTS AND DISCUSSION Sequencing of exons 4 and 7 of the ABCG2 gene revealed maternal compound heterozygosity for two nonsense mutations at exon 7 (c.706 C > T and c.784G > T). Fetal sequencing revealed the c.706C > T polymorphism. The MMA showed a borderline phagocytic index (around the cutoff of five for both donor segments tested [5 ± 1 and 7 ± 3]). The BFU-E colony formation inhibition assay suggested a dose-dependent inhibition of BFU-E colony formation with inhibition percentages of 4%, 11%, and 43% at maternal serum concentrations of 2%, 5%, and 10%, respectively. Our findings support the hypothesis that anti-Jra may impair erythropoiesis leading to clinically significant fetal/neonatal anemia. A referral to maternal fetal medicine is recommended if anti-Jra is detected in pregnancy, regardless of the titer.
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Affiliation(s)
- Ann Tran
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Matthew T S Yan
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada.,Medical Affairs and Innovation, Canadian Blood Services, Ottawa, Ontario, Canada
| | - Donald R Branch
- Medical Affairs and Innovation, Canadian Blood Services, Ottawa, Ontario, Canada.,Department of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Megan Blacquiere
- Department of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Nicolas Pineault
- Medical Affairs and Innovation, Canadian Blood Services, Ottawa, Ontario, Canada.,Department of Biochemistry, Microbiology & Immunology, University of Ottawa, Ottawa, Ontario, Canada
| | - Roya Pasha
- Medical Affairs and Innovation, Canadian Blood Services, Ottawa, Ontario, Canada
| | - Gwen Clarke
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada.,Medical Affairs and Innovation, Canadian Blood Services, Ottawa, Ontario, Canada
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7
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Yazer MH, Díaz-Valdés JR, Triulzi DJ, Cap AP. Wider perspectives: It's a changing world-The use of ABO-incompatible plasma for resuscitating massively bleeding patients. Br J Haematol 2023; 200:291-296. [PMID: 36134727 DOI: 10.1111/bjh.18460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/23/2022] [Accepted: 09/01/2022] [Indexed: 01/21/2023]
Affiliation(s)
- Mark H Yazer
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - José R Díaz-Valdés
- Hematology and Transfusion Service, Spanish Military Central Hospital, University of Alcalá, Madrid, Spain
| | - Darrell J Triulzi
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Andrew P Cap
- U.S. Army Institute of Surgical Research, Department of Medicine, Uniformed Services University, Bethesda, Maryland, USA
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8
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Addams J, Hasan RA, Saifee NH. How we approach transfusions in a patient with high risk of alloimmunization from McLeod phenotype. Pediatr Blood Cancer 2023; 70:e30119. [PMID: 36495235 DOI: 10.1002/pbc.30119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 10/15/2022] [Accepted: 11/07/2022] [Indexed: 12/14/2022]
Abstract
McLeod phenotype-caused by the missing Xk protein-is a very rare red cell phenotype, one characteristic of McLeod syndrome, and sometimes associated with X-linked chronic granulomatous disease (CGD). Diagnosis of McLeod phenotype is important for appropriate transfusion management, because red blood cells from all healthy donors will have the Xk protein with its Kx antigen and can lead to red cell antibody formation without the ability to find compatible McLeod phenotype blood for transfusion. We offer a review and approach to diagnosis of the McLeod phenotype and special transfusion considerations.
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Affiliation(s)
- Joel Addams
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington, USA.,Department of Laboratory Medicine and Pathology, Seattle Children's Hospital, Seattle, Washington, USA.,Bloodworks Northwest, Seattle, Washington, USA
| | - Rida A Hasan
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington, USA.,Department of Pediatrics, Seattle Children's Hospital, Seattle, Washington, USA
| | - Nabiha H Saifee
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington, USA.,Department of Laboratory Medicine and Pathology, Seattle Children's Hospital, Seattle, Washington, USA
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9
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Loriamini M, Lewis-Bakker MM, Frias Boligan K, Wang S, Holton MB, Kotra LP, Branch DR. Small Molecule Drugs That Inhibit Phagocytosis. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020757. [PMID: 36677815 PMCID: PMC9867408 DOI: 10.3390/molecules28020757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/05/2023] [Accepted: 01/07/2023] [Indexed: 01/14/2023]
Abstract
In our initial publication on the in vitro testing of more than 200 compounds, we demonstrated that small molecules can inhibit phagocytosis. We therefore theorized that a small molecule drug discovery-based approach to the treatment of immune cytopenias (ITP, AIHA, HTR, DHTR) is feasible. Those earlier studies showed that small molecules with anti-phagocytic groups, such as the pyrazole core, are good models for producing efficacious phagocytosis inhibitors with low toxicity. We recently screened a chemical library of 80 compounds containing pyrazole/isoxazole/pyrrole core structures and found four hit molecules for further follow-up, all having the pyrazole core structure. Subsequent evaluation via MTT viability, LDH release, and apoptosis, led to the selection of two lead compounds with negligible toxicity and high efficacy. In an in vitro assay for inhibition of phagocytosis, their IC50 values were 2-4 µM. The rational development of these discoveries from hit to lead molecule stage, viz. independent synthesis/scale up of hit molecules, and in vivo activities in mouse models of autoimmune disease, will result in the selection of a lead compound(s) for further pre-clinical evaluation.
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Affiliation(s)
- Melika Loriamini
- Centre for Innovation, Canadian Blood Services, Toronto, ON M5G 2M1, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | | | | | - Siming Wang
- Krembil Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
| | - Mairead B. Holton
- Centre for Innovation, Canadian Blood Services, Toronto, ON M5G 2M1, Canada
| | - Lakshmi P. Kotra
- Krembil Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
- Department of Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, ON M5S 3M2, Canada
- Correspondence: (L.P.K.); (D.R.B.); Tel.: +1-416-581-7602 (L.P.K.); +1-416-313-4458 (D.R.B.)
| | - Donald R. Branch
- Centre for Innovation, Canadian Blood Services, Toronto, ON M5G 2M1, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON M5S 1A8, Canada
- Department of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada
- Keenan Research Centre, Canadian Blood Services, Toronto, ON M5B 1W8, Canada
- Correspondence: (L.P.K.); (D.R.B.); Tel.: +1-416-581-7602 (L.P.K.); +1-416-313-4458 (D.R.B.)
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10
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Floch A, Lomas-Francis C, Vege S, Burgos A, Hoffman R, Cusick R, de Brevern AG, Westhoff CM. Two new Scianna variants causing loss of high prevalence antigens: ERMAP model and 3D analysis of the antigens. Transfusion 2023; 63:230-238. [PMID: 36349441 DOI: 10.1111/trf.17182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 10/20/2022] [Accepted: 10/28/2022] [Indexed: 11/11/2022]
Abstract
BACKGROUND Scianna (Sc) antigens, seven high and two of low prevalence, are expressed on erythrocyte membrane-associated protein (ERMAP). We investigated SC (ERMAP) in individuals who made antibodies to high prevalence Scianna antigens, and propose a 3D model for ERMAP to precisely localize the residues associated with the known antigens. METHODS Serological testing and DNA sequencing was performed by standard methods. A 3D structural model was built using a multi-template homology approach. Protein structures representing missense variants associated with the loss or gain of an antigen were generated. Residue accessibility and intraprotein interactions were compared with the wild-type protein. RESULTS Two new SC alleles, one with c.349C > T (p.Arg117Cys) in a woman from South India with anti-Sc3 in her plasma, and a c.217_219delinsTGT (p.Arg73Cys) in an African-American woman with an antibody to a new high prevalence antigen, termed SCAC, were identified. Six structural templates were used to model ERMAP. 3D analysis showed that residues key for Scianna antigen expression were all exposed at the surface of the extracellular domain. The p.Arg117Cys change was predicted to abolish interactions between residues 93 and 117, with no compensating interactions. CONCLUSION We confirm the extracellular location of Scianna residues responsible for antigen expression which predicts direct accessibility to antibodies. Loss of intraprotein interactions appear to be responsible for a Sc null and production of anti-Sc3 with p.117Cys, SC*01 N.03, and for loss of a high prevalence antigen with p.73Cys, termed SCAC for Sc Arg to Cys. Comparative modeling aids our understanding of new alleles and Scianna antigen expression.
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Affiliation(s)
- Aline Floch
- Immunohematology and Genomics Laboratory, New York Blood Center, New York City, New York, USA.,Laboratoire de Biologie Medicale de Reference en Immunohematologie Moleculaire, Etablissement francais du sang Ile-de-France, Creteil, France.,Univ Paris Est Creteil, INSERM U955 Equipe « Transfusion et maladies du globule rouge », IMRB, Creteil, France
| | - Christine Lomas-Francis
- Immunohematology and Genomics Laboratory, New York Blood Center, New York City, New York, USA
| | - Sunitha Vege
- Immunohematology and Genomics Laboratory, New York Blood Center, New York City, New York, USA
| | - Anna Burgos
- Immunohematology and Genomics Laboratory, New York Blood Center, New York City, New York, USA
| | - Roser Hoffman
- Vitalant Reference and Transfusion Services, Tempe, Arizona, USA
| | | | - Alexandre G de Brevern
- Université Paris Cité, Biologie Intégrée du Globule Rouge UMR_S1134, Inserm, Université de la Réunion, Université des Antilles, Paris, France
| | - Connie M Westhoff
- Immunohematology and Genomics Laboratory, New York Blood Center, New York City, New York, USA
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11
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van 't Oever RM, Zwiers C, de Winter D, de Haas M, Oepkes D, Lopriore E, Verweij EJJ. Identification and management of fetal anemia due to hemolytic disease. Expert Rev Hematol 2022; 15:987-998. [PMID: 36264850 DOI: 10.1080/17474086.2022.2138853] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
INTRODUCTION Hemolytic disease of the fetus and newborn (HDFN) is a condition caused by maternal alloantibodies against fetal red blood cells (RBCs) that can cause severe morbidity and mortality in the fetus and newborn. Adequate screening programs allow for timely prevention and intervention resulting in significant reduction of the disease over the last decades. Nevertheless, HDFN still occurs and with current treatment having reached an optimum, focus shifts toward noninvasive therapy options. AREAS COVERED This review focusses on the timely identification of high risk cases and antenatal management. Furthermore, we elaborate on future perspectives including improvement of screening, identification of high risk cases and promising treatment options. EXPERT OPINION In high-income countries mortality and morbidity rates due to HDFN have drastically been reduced over the last decades, yet worldwide anti-D mediated HDFN still accounts for 160,000 perinatal deaths and 100,000 patients with disabilities every year. Much of these deaths and disabilities could have been avoided with proper identification and prophylaxis. By implementing sustainable prevention, screening, and disease treatment measures in all countries this will systemically reduce unnecessary perinatal deaths. There is a common responsibility to engage in this cause.
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Affiliation(s)
- Renske M van 't Oever
- Department of Obstetrics and Gynecology, Division of Fetal Medicine, Leiden University Medical Center, Leiden, The Netherlands.,Department of Immunohematology Diagnostics, Sanquin,Amsterdam, The Netherlands
| | - Carolien Zwiers
- Department of Obstetrics and Gynecology, Division of Fetal Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Derek de Winter
- Department of Immunohematology Diagnostics, Sanquin,Amsterdam, The Netherlands.,Willem-Alexander Children's Hospital, department of Pediatrics, division of Neonatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Masja de Haas
- Department of Immunohematology Diagnostics, Sanquin,Amsterdam, The Netherlands.,Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands
| | - Dick Oepkes
- Department of Obstetrics and Gynecology, Division of Fetal Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Enrico Lopriore
- Willem-Alexander Children's Hospital, department of Pediatrics, division of Neonatology, Leiden University Medical Center, Leiden, The Netherlands
| | - E J Joanne Verweij
- Department of Obstetrics and Gynecology, Division of Fetal Medicine, Leiden University Medical Center, Leiden, The Netherlands
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12
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Boligan KF, Sandhu G, Branch DR. Methods to Evaluate the Potential Clinical Significance of Antibodies to Red Blood Cells. Curr Protoc 2022; 2:e504. [PMID: 35926124 DOI: 10.1002/cpz1.504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Immune-mediated red blood cell (RBC) destruction due to antibodies is an ongoing problem in transfusion medicine for the selection of the safest blood. Serological testing often revealed incompatibility with donors' RBCs. When this incompatible blood was transfused, destruction was due mostly to extravascular-mediated phagocytosis of the antibody-opsonized RBCs; however, intravascular hemolysis was sometimes observed without explanation. Based on serology, antibodies with potential for clinical sequalae could not be ascertained; thus, antigen-negative blood was usually selected for transfusion to avoid problems. Antibodies to antigens having very high frequency in the general population (>95%), however, made selection of antigen-negative blood difficult and sometimes impossible. Some patients, who were sensitized by previous transfusions or by pregnancy, developed multiple antibodies, again creating a problem for finding compatible blood for transfusion, without the ability to discern which of the antibodies may be clinically irrelevant and ignored. Transfusion medicine scientists began searching for an in vitro means to determine the in vivo outcome of transfusion of blood that was serologically incompatible. Methods such as chemiluminescence, monocyte-macrophage phagocytosis, and antibody-dependent cellular cytotoxicity (ADCC) were described. Over the years, the monocyte monolayer assay (MMA) has emerged as the most reliable in vitro assay for the prediction of the clinical relevance of a given antibody. ADCC has not been fully studied but has the potential to be useful for predicting which antibodies may result in intravascular hemolysis. This article captures the protocols for the implementation and readout of the MMA and ADCC assays for use in predicting the clinical significance of antibodies in a transfusion setting. © 2022 The Authors. Current Protocols published by Wiley Periodicals LLC. Basic Protocol 1: Monocyte monolayer assay (MMA) Basic Protocol 2: Antibody-dependent cellular cytotoxicity assay (ADCC).
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Affiliation(s)
| | - Gurleen Sandhu
- Centre for Innovation, Canadian Blood Services, Toronto, Canada
| | - Donald R Branch
- Centre for Innovation, Canadian Blood Services, Toronto, Canada
- Departments of Medicine and Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada
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Núñez Ahumada MA, Arancibia Aros CE, Villalobos Pavez CE, Pontigo Gonzalez FM, Abarca Arce V, Sandoval Medrano M, Reyes Jorquera S. A mild case of hemolytic disease of the fetus and newborn due to anti-Sc2. Immunohematology 2021; 37:122-125. [PMID: 34591375 DOI: 10.21307/immunohematology-2021-018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
We report the case of a newborn girl with jaundice due to increased indirect bilirubin with a positive direct antiglobulin test (DAT) and compensated hemolysis. The result of the newborn's DAT was discrepant with the negative result of the mother's indirect antiglobulin test. The multiparous mother had a previous history of fetal hydrops miscarriage, with no known cause, and no record of the cause was found at the hospital where she was treated. After referring samples from the mother and newborn to a reference laboratory, the rare alloanti-Sc2 was identified in the mother's plasma and in the newborn's eluate. HEA BeadChip genotyping of the newborn's DNA sample predicted the SC:1,2 phenotype. We report the case of a newborn girl with jaundice due to increased indirect bilirubin with a positive direct antiglobulin test (DAT) and compensated hemolysis. The result of the newborn’s DAT was discrepant with the negative result of the mother’s indirect antiglobulin test. The multiparous mother had a previous history of fetal hydrops miscarriage, with no known cause, and no record of the cause was found at the hospital where she was treated. After referring samples from the mother and newborn to a reference laboratory, the rare alloanti-Sc2 was identified in the mother’s plasma and in the newborn’s eluate. HEA BeadChip genotyping of the newborn’s DNA sample predicted the SC:1,2 phenotype.
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Affiliation(s)
- M A Núñez Ahumada
- Clínica Santa María , 0500 Santa María Avenue, Providencia, Santiago , Chile 7520378
| | | | - C E Villalobos Pavez
- Transfusion Medicine Service, Blood Bank, Clínica Santa María , Santiago , Chile
| | - F M Pontigo Gonzalez
- Clínica Santa María, Molecular Biology Laboratory of Blood Groups, Blood Bank, Clínica Santa María , Santiago , Chile
| | - V Abarca Arce
- Blood Bank, Clínica Alemana de Temuco , Temuco , Chile
| | | | - S Reyes Jorquera
- Blood Bank Medical Chief, Clínica Alemana de Temuco , Temuco , Chile
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Branch DR, Sandhu G, Raos M. Monocyte monolayer assay predictions of clinical outcome for serologically incompatible red blood cells is all about timing. Transfusion 2021; 61:2516-2517. [PMID: 34365664 DOI: 10.1111/trf.16556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/26/2021] [Accepted: 05/27/2021] [Indexed: 11/30/2022]
Affiliation(s)
- Donald R Branch
- Centre for Innovation, Canadian Blood Services, Toronto, Ontario, Canada
| | - Gurleen Sandhu
- Centre for Innovation, Canadian Blood Services, Toronto, Ontario, Canada
| | - Mirela Raos
- Clinical Department of Transfusion Medicine and Transplantation Biology, University Hospital Centre Zagreb, Zagreb, Croatia
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Balola AHA, Mayer B, Bartolmäs T, Salama A. A fluorometric erythrophagocytosis assay using differentiated monocytic THP-1 cells to assess the clinical significance of antibodies to red blood cells. Vox Sang 2021; 116:1106-1116. [PMID: 33942922 DOI: 10.1111/vox.13105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 03/02/2021] [Accepted: 03/09/2021] [Indexed: 02/05/2023]
Abstract
BACKGROUND AND OBJECTIVES The significance of antibodies to red blood cells (RBCs) is variable and cannot be predicted solely by serological testing. A flow cytometry-based erythrophagocytosis assay was established using phorbol 12-myristate 13-acetate (PMA)-treated THP-1 cells and RBCs labelled with PKH26 to assess allo- and autoantibodies to RBCs. MATERIALS AND METHODS THP-1 cells were differentiated into macrophage-like cells by treatment with PMA. RBC samples coated with alloantibodies or autoantibodies were obtained from 16 patients with autoimmune haemolytic anaemia of warm type (wAIHA) as well as from five pregnant women with warm autoantibodies. RBCs from healthy blood donors were used as controls. RBCs were labelled with the red lipophilic fluorescent dye PKH26 and incubated with PMA-treated THP-1 cells. After removal of nonadherent RBCs by washing and haemolysis of adherent RBCs, erythrophagocytosis was quantified by flow cytometry. RESULTS We observed significant phagocytosis of RBCs coated with clinically relevant alloantibodies (i.e. anti-D and anti-K) or autoantibodies from patients with active wAIHA, but not of those coated with alloantibodies (anti-Ch) or autoantibodies from patients and pregnant women without haemolysis. CONCLUSION The flow cytometry-based erythrophagocytosis test described here is quantitative, highly reliable, and may be helpful for the assessment of the clinical significance of antibodies to RBCs.
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Affiliation(s)
- Abdelwahab Hassan Ahmed Balola
- Institute of Transfusion Medicine, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Beate Mayer
- Institute of Transfusion Medicine, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Thilo Bartolmäs
- Institute of Transfusion Medicine, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Abdulgabar Salama
- Department of Gynecology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
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El-Sayed HAN, Abdollah MRA, Raafat SN, Ragab D. Monocyte monolayer assay in pre-transfusion testing: A magic key in transfusing patients with recurrent bad cross-match due to alloimmunization. J Immunol Methods 2021; 492:112968. [PMID: 33465386 DOI: 10.1016/j.jim.2021.112968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 01/06/2021] [Accepted: 01/12/2021] [Indexed: 10/22/2022]
Abstract
BACKGROUND The monocyte monolayer assay (MMA) is an in-vitro assay that can predict the outcome of blood transfusion of antigen positive units when serologically compatible blood is not available. MATERIALS AND METHODS Fifty-four patients testing positive by the antibody screening test using gel agglutination were further examined by the alloantibody identification panel to determine alloantibody specificity. After determining and categorizing the antibodies, patients' samples were examined using the MMA to determine the clinical significance of the detected alloantibodies. We also tested 2 seeding methods (24-well cell culture plates versus 8-well chamber-slides) and 3 visualization/staining techniques (unstained phase contrast, Leishman and Giemsa staining). RESULTS 35 out of the 54 cases (64.8%) had a monocyte index of >5% which is predictive of occurrence of hemolytic reaction after transfusion; 23 cases with antibodies known to be clinically significant [anti-C, anti-E, anti-c, anti-K, anti-Fy(a), anti Fy(b), anti-JK(b)], 2 with Anti-M specificity, 7 cases with autoantibodies and 3 cases with multiple antibodies. On the other hand, 19 out of the 54 (35.2%) cases included in the study showed a monocyte index of <5% which is predictive of absence of hemolytic reaction after transfusion. The 8-well chamber-slides were better than the 24-well culture plates, as the latter showed a lot of un-phagocytosed RBCs in the background. Also, Leishman staining was better than Giemsa staining with better and clearer differentiation between the RBCs, monocytes and phagocytic vacuoles. CONCLUSION MMA can be used as a surrogate cross-match test for the selection of blood units in cases where antigen-negative blood units are not available.
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Affiliation(s)
| | - Maha R A Abdollah
- Pharmacology and Biochemistry, Faculty of Pharmacy, The British University in Egypt (BUE), Egypt; The Center for Drug Research and Development (CDRD), Faculty of Pharmacy, The British University in Egypt (BUE), Egypt
| | - Shereen N Raafat
- Pharmacology, Faculty of Dentistry, The British University in Egypt (BUE), Egypt; Dentistry Research Center (DRC), Faculty of Dentistery, The British University in Egypt (BUE), Egypt
| | - Dina Ragab
- Clinical Pathology, Faculty of Medicine, Ain Shams University, Egypt.
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Tong TN, Blacquiere M, Sakac D, Burke-Murphy E, Yi Q, Callum J, Cserti-Gazdewich C, Parmar N, Shehata N, Pavenski K, Lau W, Lin Y, Lieberman L, Branch DR, Pendergrast J. The utility of a monocyte monolayer assay in the assessment of intravenous immunoglobulin-associated hemolysis. Transfusion 2020; 60:3010-3018. [PMID: 33091964 DOI: 10.1111/trf.16131] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 09/10/2020] [Accepted: 09/28/2020] [Indexed: 01/19/2023]
Abstract
BACKGROUND Hemolysis following the administration of intravenous immunoglobulin (IVIG) is an important adverse event (AE). While the monocyte monolayer assay (MMA) has been used to predict in vivo hemolysis when serologically incompatible blood may be transfused, it has also been shown to correlate with IVIG-associated hemolysis. In this study, the MMA was examined for its utility in assessing the risk of hemolysis after IVIG. STUDY DESIGN AND METHODS Forty-two non-blood group O patients receiving high-dose IVIG (≥2 g/kg) were examined using an autologous and allogeneic MMA. Hemolysis was defined by a drop in hemoglobin of ≥1 g/L, a positive direct antiglobulin test (DAT) and eluate, and a decrease in haptoglobin or increase in lactate dehydrogenase and/or reticulocytes. RESULTS Forty-two patients provided 50 assessable postinfusion samples, with hemolysis observed in 20 (40%) of cases. Autologous MMA using post-IVIG red blood cells significantly correlated with clinical outcomes when compared to allogeneic MMA (P = .0320 vs .5806, t test). No significant difference in receiver operating characteristics was observed when comparing autologous MMA testing against DAT for the diagnosis of IVIG-associated hemolysis. However, when using samples collected 5 to 10 days after receipt of high-dose IVIG, the autologous MMA had higher sensitivity than the DAT. CONCLUSION MMA testing with autologous monocytes collected 5 to 10 days after receipt of high-dose IVIG can be used for the diagnosis of IVIG-associated hemolysis and may be of particular value in cases in which the Day 5 to 10 DAT is negative.
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Affiliation(s)
- Tik Nga Tong
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.,Centre for Innovation, Canadian Blood Services, Toronto, Ontario, Canada
| | - Megan Blacquiere
- Centre for Innovation, Canadian Blood Services, Toronto, Ontario, Canada
| | - Darinka Sakac
- Centre for Innovation, Canadian Blood Services, Toronto, Ontario, Canada
| | | | - Qilong Yi
- Centre for Innovation, Canadian Blood Services, Ottawa, Ontario, Canada
| | - Jeannie Callum
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.,Department of Laboratory Medicine and Molecular Diagnostics, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - Christine Cserti-Gazdewich
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.,Laboratory Medicine Program, University Health Network, Toronto, Ontario, Canada
| | - Nagina Parmar
- Laboratory Medicine Program, University Health Network, Toronto, Ontario, Canada
| | - Nadine Shehata
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.,Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, Toronto, Ontario, Canada.,Canadian Blood Services, Toronto, Ontario, Canada
| | - Katerina Pavenski
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.,Department of Laboratory Medicine, St. Michael's Hospital, Toronto, Ontario, Canada
| | - Wendy Lau
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.,Canadian Blood Services, Toronto, Ontario, Canada.,Department of Transfusion Medicine, Pediatric Laboratory Medicine, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Yulia Lin
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.,Department of Laboratory Medicine and Molecular Diagnostics, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - Lani Lieberman
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.,Laboratory Medicine Program, University Health Network, Toronto, Ontario, Canada
| | - Donald R Branch
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.,Centre for Innovation, Canadian Blood Services, Toronto, Ontario, Canada.,Departments of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Jacob Pendergrast
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.,Laboratory Medicine Program, University Health Network, Toronto, Ontario, Canada
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Geisen C, North A, Becker L, Brixner V, von Goetz M, Corash L, Benjamin RJ, Mufti N, Seifried E. Prevalence of natural and acquired antibodies to amustaline/glutathione pathogen reduced red blood cells. Transfusion 2020; 60:2389-2398. [PMID: 32692456 DOI: 10.1111/trf.15965] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 05/25/2020] [Accepted: 06/11/2020] [Indexed: 01/14/2023]
Abstract
BACKGROUND The INTERCEPT™ Blood System for Red Blood Cells (RBCs) utilizes amustaline (S-303) and glutathione (GSH) to inactivate pathogens and leukocytes in transfused RBCs. Treatment-emergent low titer non-hemolytic antibodies to amustaline/GSH RBC were detected in clinical trials using a prior version of the process. The amustaline/GSH process was re-formulated to decrease S-303 RBC adduct formation. STUDY DESIGN AND METHODS A standard three-cell antibody screening panel was modified to include reagent red cells (RRC) with high (S-303H) or low (S-303L) S-303 adduct density as assessed by flow cytometry, representative of the original and current amustaline/GSH treatment processes, respectively. General hospital and RBC transfusion-dependent patients never exposed, and clinical trial subjects exposed to amustaline/GSH RBC were screened for antibodies to amustaline/GSH RBC using a standardized agglutination assay. RESULTS Twelve (0.1%) of 10,721 general hospital and 5 (0.5%) of 998 repeatedly-transfused patients not previously exposed to amustaline/GSH RBCs expressed natural, low titer (2-32) IgM and/or IgG (non-IgG1 or IgG3 isotype) antibodies with acridine (a structural element of amustaline) (n = 14) or non-acridine (n = 3) specificity. 11 of 17 sera reacted with S-303L panel RRCs. In clinical studies 81 thalassemia and 25 cardiac surgery patients were transfused with a total of 1085 amustaline/GSH RBCs and no natural or treatment-emergent S-303 antibodies were detected. CONCLUSION Standardized RRC screening panels are sensitive for the detection of natural and acquired S-303-specific antibodies. Natural low titer antibodies to amustaline/GSH RBC are present in 0.15% of naïve patients. The clinical relevance of these antibodies appears minimal but is under further investigation.
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Affiliation(s)
- Christof Geisen
- Institute of Transfusion Medicine and Immunohaematology, German Red Cross Blood Transfusion Service Baden-Württemberg-Hessen gGmbH, Goethe University Hospital Frankfurt/Main, Frankfurt am Main, Germany
| | - Anne North
- Cerus Corporation, Concord, California, USA
| | - Lisa Becker
- Institute of Transfusion Medicine and Immunohaematology, German Red Cross Blood Transfusion Service Baden-Württemberg-Hessen gGmbH, Goethe University Hospital Frankfurt/Main, Frankfurt am Main, Germany
| | - Veronika Brixner
- Institute of Transfusion Medicine and Immunohaematology, German Red Cross Blood Transfusion Service Baden-Württemberg-Hessen gGmbH, Goethe University Hospital Frankfurt/Main, Frankfurt am Main, Germany
| | | | | | | | - Nina Mufti
- Cerus Corporation, Concord, California, USA
| | - Erhard Seifried
- Institute of Transfusion Medicine and Immunohaematology, German Red Cross Blood Transfusion Service Baden-Württemberg-Hessen gGmbH, Goethe University Hospital Frankfurt/Main, Frankfurt am Main, Germany
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Thein SL, Pirenne F, Fasano RM, Habibi A, Bartolucci P, Chonat S, Hendrickson JE, Stowell SR. Hemolytic transfusion reactions in sickle cell disease: underappreciated and potentially fatal. Haematologica 2020; 105:539-544. [PMID: 32029505 PMCID: PMC7049330 DOI: 10.3324/haematol.2019.224709] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 12/18/2019] [Indexed: 12/20/2022] Open
Affiliation(s)
- Swee Lay Thein
- National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MA, USA
| | - France Pirenne
- Etablissement Français du Sang, INSERM U955, Université Paris Est Créteil, Créteil, France.,Laboratoire d'Excellence GR-Ex, Paris, France
| | - Ross M Fasano
- Center for Transfusion Medicine and Cellular Therapies, Department of Laboratory Medicine and Pathology, Emory University School of Medicine, Atlanta, GA, USA.,Aflac Cancer and Blood Disorders Center, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA
| | - Anoosha Habibi
- Laboratoire d'Excellence GR-Ex, Paris, France.,Sickle Cell Referral Center, Department of Internal Medicine, Henri-Mondor University Hospital- UPEC, AP-HP, Créteil, France
| | - Pablo Bartolucci
- Sickle Cell Referral Center, Department of Internal Medicine, Henri-Mondor University Hospital- UPEC, AP-HP, Créteil, France
| | - Satheesh Chonat
- Aflac Cancer and Blood Disorders Center, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA
| | - Jeanne E Hendrickson
- Departments of Laboratory Medicine and Pediatrics, Yale University School of Medicine, New Haven, CT, USA
| | - Sean R Stowell
- Center for Transfusion Medicine and Cellular Therapies, Department of Laboratory Medicine and Pathology, Emory University School of Medicine, Atlanta, GA, USA
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Cen SY, Holton MB, Binnington B, Denomme GA, Howie HL, Lebedev JN, Zimring JC, Branch DR. IgG3 anti-Kell allotypic variation results in differential antigen binding and phagocytosis. Transfusion 2020; 60:688-693. [PMID: 31930726 DOI: 10.1111/trf.15663] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 12/09/2019] [Accepted: 12/23/2019] [Indexed: 12/21/2022]
Abstract
BACKGROUND Human immunoglobulin G (hIgG) includes four different subtypes (IgG1, IgG2, IgG3, and IgG4). Due to genetic variations, each IgG subtype contains different isoallotypes. It was previously shown that a Food and Drug Administration-approved monoclonal anti-IgG failed to recognize 2 of 15 recombinant, human IgG3 anti-Kell (K1) isoallotypes (rIgG3-03 and rIgG3-13) by indirect antiglobulin test (IAT). STUDY DESIGN AND METHODS We expressed and purified 15 recombinant human rIgG3 anti-K1 isoallotypes and investigated their antigen binding and ability to induce phagocytosis using homozygous (KK) and heterozygous (Kk) K1-positive red blood cells (RBCs) by gel IAT, flow cytometry, and a monocyte monolayer assay (MMA) with peripheral blood monocytes and cultured inflammatory (M1) and anti-inflammatory (M2) macrophages. RESULTS MMA results showed that differences in the Fc region of rIgG3 anti-K1 led to distinctive phagocytic activity with both monocytes and M1 macrophages. rIgG3-18 and rIgG3-19 showed an enhanced ability to induce phagocytosis. Differences in Fc regions also led to variations in the number of antibodies bound to KK RBCs. Despite the differences in phagocytic activity, all 15 rIgG3 clones are predicted to induce clinically significant hemolysis if K1-positive blood was transfused into patients. CONCLUSION These results argue that antiglobulin reagents that fail to detect isoallotype rIgG3-03 or rIgG3-13 could present a transfusion risk or lack of detection of a potentially clinically significant anti-K1 in hemolytic disease of the fetus and newborn.
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Affiliation(s)
- Selena Y Cen
- Center for Innovation, Canadian Blood Services, Toronto, Ontario, Canada
| | - Mairead B Holton
- Center for Innovation, Canadian Blood Services, Toronto, Ontario, Canada
| | - Beth Binnington
- Center for Innovation, Canadian Blood Services, Toronto, Ontario, Canada
| | | | | | | | | | - Donald R Branch
- Center for Innovation, Canadian Blood Services, Toronto, Ontario, Canada.,Department of Medicine, University of Toronto, Toronto, Ontario, Canada
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Cen SY, Branch DR. Isoagglutinin-reduced immunoglobulin retains efficacy in mouse models of immune thrombocytopenia and rheumatoid arthritis and is less likely to cause intravenous immunoglobulin-associated hemolysis. Transfusion 2019; 60:250-255. [PMID: 31837028 PMCID: PMC7496430 DOI: 10.1111/trf.15622] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 11/11/2019] [Accepted: 11/15/2019] [Indexed: 12/16/2022]
Abstract
BACKGROUND Immunoglobulin therapy including intravenous immunoglobulin (IVIg) has been used as an effective treatment for autoimmune/inflammatory conditions with few side effects. However, high‐dose IVIg (1‐2 g/kg) has been recognized as a cause of hemolytic anemia in non–blood group O patients. Hemolysis when observed has been due to anti‐A/anti‐B isoagglutinins contained in the IVIg. Recently, an isoagglutinin‐reduced IVIg, whereby the anti‐A and anti‐B titers have been reduced by immunoaffinity chromatography, has been introduced; however, whether this new product is as efficacious as nonreduced immunoglobulin (Ig) or will result in less IVIg‐associated hemolysis has not been resolved. STUDY DESIGN AND METHODS We used in vitro phagocytosis by monocytes and proinflammatory/anti‐inflammatory macrophages, with isoagglutinin‐reduced and ‐nonreduced Ig opsonized group A1, B, and A1B red blood cells, to estimate clinical significance of the IgG isoagglutinins. We also used immune thrombocytopenia (ITP) and rheumatoid arthritis (RA) mouse models to examine the in vivo efficacy of isoagglutinin‐reduced versus ‐nonreduced Ig on the amelioration of the diseases. RESULTS In contrast to nonreduced Ig, phagocytosis was largely absent when isoagglutinin‐reduced Ig was used at a concentration equivalent to a patient receiving 2 g/kg. The in vivo efficacy of isoagglutinin‐reduced versus nonreduced Ig on the amelioration of experimental ITP and RA was similar, indicating no loss of efficacy due to the chromatographic removal of isoagglutinins. CONCLUSION Isoagglutinin‐reduced Ig should have efficacy similar to nonreduced Ig and result in less IVIg‐associated hemolysis.
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Affiliation(s)
- Selena Y Cen
- Center for Innovation, Canadian Blood Services, Toronto, Ontario, Canada
| | - Donald R Branch
- Center for Innovation, Canadian Blood Services, Toronto, Ontario, Canada.,Department of Medicine, University of Toronto, Toronto, Ontario, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
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