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Hua Q, Lyon BW, Duke J, Felske A, Hobbs K, Holman R, Radwi G, Sidhu D, Clarke G, Nahirniak S. Isohemagglutinin titration in pooled and apheresis platelets. Transfusion 2024. [PMID: 38795022 DOI: 10.1111/trf.17873] [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: 12/02/2023] [Revised: 04/15/2024] [Accepted: 05/01/2024] [Indexed: 05/27/2024]
Abstract
BACKGROUND Platelet inventory constraints necessitate ABO-incompatible platelet transfusion. Many minimize the hemolytic impact by confirming low titre (LT) donor isohemagglutinins. This process is costly. Pathogen-reduced platelets (PRP) in platelet additive solutions (PAS) will dilute plasma and decrease high-titre isohemagglutinins (HT). We determined the proportion of HT platelets and incompatible transfusions for units suspended in plasma to reassess the need for titres following introduction of PRP/PAS. STUDY DESIGN AND METHODS Our titre method is manual tube (1:50) dilution of platelet supernatant from apheresis or whole blood derived buffy coat pools suspended in plasma, tested with A1/B red cells. Testing included 49,058 pooled and 11,738 apheresis platelets over 4 years. The HT proportion, rate of out-of-group transfusions, and hemolytic reactions were determined. The impact of PAS dilution was estimated. RESULTS Totally 60,796 platelet units were tested. Group O pooled and group B apheresis platelets had HT in 6.6% and 5.7%, respectively. Group A pooled and apheresis platelets included 2% with HT. Approximately 25% of platelets transfused were ABO-incompatible and no hemolytic reactions were reported. Based on the proportions of PAS-E and plasma for PRP platelets, plasma from each donor comprises 11 mL (6% of total volume) vs 20-257 mL in untreated pools. PAS-E will replace and dilute residual plasma by at least 50%. DISCUSSION Rare platelet pools may demonstrate HT. PRP platelets with PAS will reduce titres and may abrogate the need for titration. A strategy of group specific transfusion or transfusion of group A PRP platelet transfusions may be a safe alternative.
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Affiliation(s)
- QingYun Hua
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - Bruce W Lyon
- Transfusion & Transplantation Medicine Program, Alberta Precision Laboratories, Edmonton, Alberta, Canada
| | - Jennifer Duke
- Transfusion & Transplantation Medicine Program, Alberta Precision Laboratories, Edmonton, Alberta, Canada
| | - Amanda Felske
- Transfusion & Transplantation Medicine Program, Alberta Precision Laboratories, Edmonton, Alberta, Canada
| | - Karen Hobbs
- Transfusion & Transplantation Medicine Program, Alberta Precision Laboratories, Edmonton, Alberta, Canada
| | - Ryan Holman
- Transfusion & Transplantation Medicine Program, Alberta Precision Laboratories, Edmonton, Alberta, Canada
| | - Ghazala Radwi
- Transfusion & Transplantation Medicine Program, Alberta Precision Laboratories, Edmonton, Alberta, Canada
| | - Davinder Sidhu
- Transfusion & Transplantation Medicine Program, Alberta Precision Laboratories, Edmonton, Alberta, Canada
| | - Gwen Clarke
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - Susan Nahirniak
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
- Transfusion & Transplantation Medicine Program, Alberta Precision Laboratories, Edmonton, Alberta, Canada
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2
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Ding X, Liu L, Yang G, Liu H. Dissociation Phenomenon of Erythrocyte Agglutination and Its Application to Assay of Functional Activity of the Complement System in Clinical Laboratory. J Clin Lab Anal 2024; 38:e25028. [PMID: 38506373 PMCID: PMC10997817 DOI: 10.1002/jcla.25028] [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] [Received: 08/01/2023] [Revised: 02/19/2024] [Accepted: 03/01/2024] [Indexed: 03/21/2024] Open
Abstract
OBJECTIVE The objective of the study was to validate the dissociation phenomenon of erythrocyte agglutination which is based on erythrocyte fragments and to apply it in the functional activity assay of the complement system. METHODS The dissociation-agglutination effect of erythrocyte fragments was validated by detecting the number of free erythrocytes after the action of erythrocyte fragments on agglutinated erythrocytes. The number of free erythrocytes produced after hemolysis of agglutinated erythrocytes caused by complements and complement activators(CAs) was detected by auto hematology analyzer and the results were indicated by mean hemoglobin concentration of erythrocytes (MCHC). We optimized the test conditions and validated the inter-batch stability, explored the resolution of the assay method, and assayed for the total complement activity (AC) and the CAs activated complement activity (ACA) in serum from patients and healthy individual groups. RESULTS Erythrocyte fragments have a dissociative effect on agglutinated erythrocytes. The auto hematology analyzer was able to detect AC and ACA, where AC showed an inverse correlation with MCHC, and ACA demonstrated a positive correlation with MCHC. The inter-batch CV of AC, ACA, and ACA/AC was found to be 5%, 9%, and 11.7%, respectively, with good stability. The study found that serum samples from acute phase reaction patients showed significant differences in ACA compared with healthy individuals, with a p value of 0.018; serum samples from patients with nephrotic syndrome showed significant differences in AC, ACA, and ACA/AC compared with healthy individuals, with p values of 0.014, 0.002, and 0.041, respectively. CONCLUSION Erythrocyte fragments have dissociation-agglutination effect. The complement system immunological functional detection method, based on this effect, has potential clinical application value due to its sensitivity and accuracy.
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Affiliation(s)
- Xuewei Ding
- College of Medical LaboratoryDalian Medical UniversityDalianChina
| | - Lina Liu
- Second Afliated Hospital of Dalian Medical UniversityDalianChina
| | - Guang Yang
- College of Medical LaboratoryDalian Medical UniversityDalianChina
| | - Hui Liu
- College of Medical LaboratoryDalian Medical UniversityDalianChina
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Min S, Zhan T, Lu Y, Pan D, Chen X, Xu B. Rapid and easily identifiable blood typing on microfluidic cotton thread-based analytical devices. LAB ON A CHIP 2023; 23:4680-4689. [PMID: 37817672 DOI: 10.1039/d3lc00501a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/12/2023]
Abstract
In this study, we present a novel swing-elution-based method to achieve rapid, cost-effective, and easily identifiable blood typing assays. Specifically, the method aims to swing the microfluidic cotton thread-based analytical devices (μCTADs) in PBS solution to effectively elute free red blood cells (RBCs) and allow large agglutinated RBCs to remain to precisely determine the blood type. In order to ensure an easily identifiable blood typing assay, fast swing mode needs to be used, and the elution time is evaluated to be >50 seconds. The created μCTADs have been used to successfully classify ABO and RhD blood types in 56 blood samples. Finally, in order to enhance the convenience and portability of blood typing, a blood-typing chip that utilizes a PBS liquid bridge to effectively elute the free RBCs is designed and fabricated based on the above swing-elution principle. Compared with the traditional wicking-elution methods that rely on the wicking effect to weakly elute the RBCs, our method possesses a stronger elution effect to remove the free RBCs inside the inter-fiber gaps or adhered to the fiber surface, resulting in effectively enhancing the identifiability of the elution results and minimizing user interpretation error. Given the simplicity of the blood typing method, we believe that our blood typing method has great potential to be widely applied in resource-limited and developing regions.
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Affiliation(s)
- Shuqiang Min
- School of Mechanical Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China.
| | - Tonghuan Zhan
- School of Mechanical Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China.
| | - Yang Lu
- Department of spinal surgery, Affiliated hospital of Nantong University, Nantong, 226001, China.
| | - Deng Pan
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Anhui University, Hefei, 230601 China
| | - Xiaoqing Chen
- Department of spinal surgery, Affiliated hospital of Nantong University, Nantong, 226001, China.
| | - Bing Xu
- School of Mechanical Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China.
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4
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Anti-CD38 Monoclonal Antibodies Interfere With Isoagglutinin Detection. Transplantation 2023; 107:e74-e75. [PMID: 36808846 DOI: 10.1097/tp.0000000000004453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
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5
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Pandey P, Ranjan S, Setya D, Kumari S. Comparative evaluation of titer estimation of ABO isoagglutinins using three different methods. INDIAN JOURNAL OF TRANSPLANTATION 2023. [DOI: 10.4103/ijot.ijot_63_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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6
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Matsuura H, Sugiura Y, Matsuno T, Tomiya Y, Shiraki M, Kato C, Ishihara K, Fukami H, Niwa R, Hayashi M, Matsushita T, Kato H, Watarai Y, Ito T, Kenmochi T, Fujii S, Miura Y. Feasibility of the automated column agglutination technique for titration of anti-A/B antibodies in ABO-incompatible living kidney transplantation. Ther Apher Dial 2021; 26:827-835. [PMID: 34812590 DOI: 10.1111/1744-9987.13764] [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: 09/22/2021] [Revised: 10/27/2021] [Accepted: 11/20/2021] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Quantitative measurement of anti-A/-B antibody titers is important during ABO-incompatible living kidney transplantation (ABOi-LKT). METHODS We conducted a multi-institutional study to measure the antibody titers using the automated column agglutination technique (auto-CAT) and tube test (TT) method in ABOi-LKT recipients. Statistical analysis was performed to evaluate the two methods. RESULTS We examined 111 samples from 35 ABOi-LKT recipients at four institutions. The correlation coefficient of the two methods was >0.9; the concordance rate and clinically acceptable concordance rate for the IgG titers were 60.4% and 88.3%, respectively. Perioperative status did not influence the statistical significance. Parallel changes were observed in the IgG antibody titers measured using the auto-CAT or TT technique by desensitizing therapy in time-course monitoring. CONCLUSION Auto-CAT is comparable with the TT technique and is feasible for IgG anti-A/B antibody titration in ABOi-LKT recipients.
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Affiliation(s)
- Hideaki Matsuura
- Department of Cell and Molecular Biology, Fujita Health University School of Medical Sciences, Toyoake, Japan.,Department of Blood Transfusion, Fujita Health University Hospital, Toyoake, Japan
| | - Yukari Sugiura
- Department of Blood Transfusion, Fujita Health University Hospital, Toyoake, Japan.,Department of Clinical Laboratory, Fujita Health University Hospital, Toyoake, Japan
| | - Takahiro Matsuno
- Department of Blood Transfusion, Fujita Health University Hospital, Toyoake, Japan.,Department of Clinical Laboratory, Fujita Health University Hospital, Toyoake, Japan
| | - Yume Tomiya
- Department of Blood Transfusion, Fujita Health University Hospital, Toyoake, Japan.,Department of Clinical Laboratory, Fujita Health University Hospital, Toyoake, Japan
| | - Mari Shiraki
- Department of Blood Transfusion, Fujita Health University Hospital, Toyoake, Japan.,Department of Clinical Laboratory, Fujita Health University Hospital, Toyoake, Japan
| | - Chiaki Kato
- Department of Medical Technique, Nagoya University Hospital, Nagoya, Japan
| | - Keiko Ishihara
- Department of Clinical Laboratory, Japanese Red Cross Nagoya Daini Hospital, Nagoya, Japan
| | - Harue Fukami
- Department of Clinical Laboratory, Japanese Red Cross Nagoya Daini Hospital, Nagoya, Japan
| | - Reiko Niwa
- Department of Transfusion Medicine, Aichi Medical University Hospital, Nagakute, Japan
| | - Megumi Hayashi
- Department of Transfusion Medicine, Aichi Medical University Hospital, Nagakute, Japan
| | - Tadashi Matsushita
- Department of Transfusion Medicine, Nagoya University Hospital, Nagoya, Japan
| | - Hidefumi Kato
- Department of Transfusion Medicine, Aichi Medical University Hospital, Nagakute, Japan
| | - Yoshihiko Watarai
- Department of Transplant Surgery, Japanese Red Cross Nagoya Daini Hospital, Nagoya, Japan
| | - Taihei Ito
- Department of Transplant Surgery, Fujita Health University School of Medicine, Toyoake, Japan
| | - Takashi Kenmochi
- Department of Transplant Surgery, Fujita Health University School of Medicine, Toyoake, Japan
| | - Sumie Fujii
- Department of Blood Transfusion, Fujita Health University Hospital, Toyoake, Japan.,Department of Transfusion Medicine and Cell Therapy, Fujita Health University School of Medicine, Toyoake, Japan
| | - Yasuo Miura
- Department of Blood Transfusion, Fujita Health University Hospital, Toyoake, Japan.,Department of Transfusion Medicine and Cell Therapy, Fujita Health University School of Medicine, Toyoake, Japan
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Sprogøe U, Assing K, Nielsen C, Rasmussen MH, Yazer MH. Quantification of anti-A of IgM or IgG isotype using three different methodologies. Transfusion 2021; 61 Suppl 1:S214-S222. [PMID: 34269431 DOI: 10.1111/trf.16491] [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: 12/28/2020] [Revised: 02/15/2021] [Accepted: 02/16/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Reliability of ABO-antibody measurement is important in the context of supplying low-titer ABO incompatible plasma-containing blood products. This study investigated the correlation of anti-A measurements between three different titer methodologies. METHODS Thirty-four blood group O individuals were included. IgM and IgG anti-A was measured by three different methods: (1) manual method (Bio-Rad ID-gel card), (2) automated method (Immucor NEO), (3) flow cytometry (FC) with calibration in molecules of equivalent fluorochrome (MEF). Data were log2 transformed to titer steps (TS) and log2 MEF, respectively. All three methods were benchmarked against the 14/300 WHO anti-A/anti-B standard reagent. RESULTS The correlation between the manual and automated methods was statistically significant for both IgM (Spearman's rs = 0.89, p < .0001) and IgG (rs = 0.95, p < .0001). The mean TS difference between the manual and automated methods was 0.61 for IgM (p = .0033) and 2.1 for IgG (p < .0001). The manual method yielded IgM titer results that were generally 1 titer step higher than the automated method, whereas for the IgG titrations the difference was generally a median of 2 TS higher. The FC median log2 MEF level was significantly correlated with TS of IgG and IgM for both manual and automated agglutination-based titer methods (0.69 ≤ r2 ≤ 0.91). With the WHO standard reagent, the manual method produced the expected results while the automated method's results were 1 TS lower for both IgM and IgG at all dilutions tested. CONCLUSION These results indicate that all three methods are suitable for measuring anti-A in group O whole blood.
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Affiliation(s)
- Ulrik Sprogøe
- South Danish Transfusion Service, Department of Clinical Immunology, Odense University Hospital, Odense, Denmark
| | - Kristian Assing
- South Danish Transfusion Service, Department of Clinical Immunology, Odense University Hospital, Odense, Denmark.,Department of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Christian Nielsen
- South Danish Transfusion Service, Department of Clinical Immunology, Odense University Hospital, Odense, Denmark
| | - Mads Hvidkjaer Rasmussen
- South Danish Transfusion Service, Department of Clinical Immunology, Odense University Hospital, Odense, Denmark
| | - Mark H Yazer
- Department of Clinical Research, University of Southern Denmark, Odense, Denmark.,Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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Nam M, Hur M, Lee H, Kim H, Park M, Moon HW, Yun YM. Comparison between tube test and automated column agglutination technology on VISION Max for anti-A/B isoagglutinin titres: A multidimensional analysis. Vox Sang 2021; 117:399-407. [PMID: 34318939 DOI: 10.1111/vox.13184] [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: 04/02/2021] [Revised: 07/08/2021] [Accepted: 07/12/2021] [Indexed: 12/01/2022]
Abstract
BACKGROUND AND OBJECTIVES VISION Max (Ortho Clinical Diagnostics, Raritan, NJ) measures anti-A/B isoagglutinin titres using automated column agglutination technology (CAT). We compared tube test (TT) and CAT of VISION Max comprehensively, including failure mode and effect analysis (FMEA), turnaround time (TAT) and cost, and suggested modified CAT (MCAT). MATERIALS AND METHODS For 100 samples (each 25 for blood type A, B and O with anti-A and anti-B), anti-A/B isoagglutinin titres were measured by TT and CAT (1:2-1:1024 dilution), as well as by MCAT (with agglutination at 1:32 dilution, then perform additional testing from 1:64 to 1:1024). We assessed the agreement and correlation between TT and CAT and compared FMEA (risk priority number [RPN] score), TAT (h:min:sec) and cost (US dollar, US $) among TT, CAT and MCAT. RESULTS TT and CAT showed overall substantial agreement (k = 0.73) and high correlation (ρ ≥ 0.75) except blood type O with anti-A (ρ = 0.68). Compared with TT, CAT showed lower RPN scores in FMEA and similar TAT and cost (FMEA, 33,700 vs. 184,300; TAT, 15:23:00 vs. 14:26:40; cost, 1377.4 vs. 1312.4, respectively). Regarding FMEA, TAT and cost, MCAT was superior to CAT or TT (43,810; 13:28:00; 899.2, respectively). CONCLUSION This is the first multidimensional analysis on VISION Max CAT for measuring anti-A/B isoagglutinin titres. The results of anti-A/B isoagglutinin titres by CAT were comparable with those of TT. MCAT would be a safe, time-saving and cost-effective alternative to TT and CAT in high-volume blood bank laboratories.
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Affiliation(s)
- Minjeong Nam
- Department of Laboratory Medicine, Konkuk University School of Medicine, Seoul, South Korea
| | - Mina Hur
- Department of Laboratory Medicine, Konkuk University School of Medicine, Seoul, South Korea
| | - Hyunkyung Lee
- Department of Laboratory Medicine, Konkuk University School of Medicine, Seoul, South Korea
| | - Hanah Kim
- Department of Laboratory Medicine, Konkuk University School of Medicine, Seoul, South Korea
| | - Mikyoung Park
- Department of Laboratory Medicine, Yeungnam University College of Medicine, Daegu, South Korea
| | - Hee-Won Moon
- Department of Laboratory Medicine, Konkuk University School of Medicine, Seoul, South Korea
| | - Yeo-Min Yun
- Department of Laboratory Medicine, Konkuk University School of Medicine, Seoul, South Korea
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9
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Chopra P, Bhardwaj S, Samkaria A, Amoli A, Arora A. Evaluation of Erythrocytes Magnetized Technology for Measurement of ABO Isoagglutinin Titers. J Lab Physicians 2021; 14:132-138. [PMID: 35982875 PMCID: PMC9381308 DOI: 10.1055/s-0041-1732808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Background
A variation in the measurement of ABO antibody titer has been seen among different laboratories due to lack of standardization. In our study, we aim to evaluate automated ABO isoagglutinin titer measurements by erythrocytes magnetized technology (EMT) and compare with conventional tube technique (TT).
Methods
We performed ABO isoagglutinin titration on samples received in a reference laboratory during a period of 2 months. A total of 134 tests for immunoglobulin G (IgG) titer and 116 for immunoglobulin M (IgM) for anti-A or anti-B were included in the study. Samples were processed for ABO isoagglutination titers by both TT and EMT by QWALYS-3 (DIAGAST, France). Microsoft Excel was used to compile data, for all calculations, and to draw graphs and plots. The number and percentage of cases within ±1, ±2, or ±3 titer difference (TT-EMT) were calculated.
Results
Median titers and their ranges obtained by EMT were higher or equal to those by TT for all IgM and IgG ABO-antibodies in all blood group (BGs), except anti-A IgM in (BG) O that was lower by EMT (32 [4:128]) than TT (48 [8:256]). One twenty one (121/134, 90.3%) cases of IgG titer showed an agreement by both methods (within ± one titer difference). One hundred seven cases (107/116, 92.2%) for IgM titer were within one titer difference by both the methods.
Conclusion
Results of titration by EMT-based automated instrument QWALYS-3 and conventional TT may vary by one titer dilution in the majority of cases. Use of consistent method for patient management is, therefore, advised.
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Affiliation(s)
- Parul Chopra
- Department of Laboratory Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Sunanda Bhardwaj
- Department of Hematology and Immunology, Dr. Lal PathLabs Ltd., National Reference Lab, New Delhi, India
| | | | - Asha Amoli
- Department of Hematology and Immunology, Dr. Lal PathLabs Ltd., National Reference Lab, New Delhi, India
| | - Anil Arora
- Department of Hematology and Immunology, Dr. Lal PathLabs Ltd., National Reference Lab, New Delhi, India
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10
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Kahlyar H, Roxby D, Badrick T, Vanniasinkam T. Challenges in antibody titration for ABO-incompatible renal transplantation. Vox Sang 2021; 117:109-118. [PMID: 34105779 DOI: 10.1111/vox.13160] [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: 03/30/2021] [Revised: 05/16/2021] [Accepted: 05/16/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND AND OBJECTIVES Accurate and regular monitoring of anti-A and anti-B titres pre- and post-transplantation plays a crucial role in the clinical management of patients receiving ABO-incompatible renal transplants. There is no standardized protocol or an external quality assurance program (EQA) currently available for this testing in Australia. The aim of this study was to investigate the diversity of techniques, test platforms and reagents that were currently in use in various laboratories with the aim of developing an EQA. MATERIALS AND METHODS An online survey was sent to the participants enrolled with the Royal College of Pathologists of Australasia Quality Assurance Program (RCPAQAP) to assess their interest in participation in the pilot study. A total of 24 participants who expressed interest were sent the group O plasma, A1 , A2 and B cells to perform ABO titration using their own methods. RESULTS Participants reported a wide range of titre results, from 8 to 1024 for the anti-A titre using A1 cells, from 2 to 128 for anti-A titre using A2 cells and from neat to 32 for anti-B titre using B cells. CONCLUSION There was a wide variation in titre results between and within different technologies. These findings demonstrate the need for an ABO titration EQA. Development of a standard technique and participation in an EQA program should, over time, reduce variation and enable transferrable results across testing centres, which will assist in consistent clinical interpretation and better outcomes for patients.
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Affiliation(s)
- Htar Kahlyar
- Royal College of Pathologists of Australasia, Sydney, New South Wales, Australia
| | - David Roxby
- College of Medicine and Public Health, Flinders University, South Australia, Australia
| | - Tony Badrick
- Royal College of Pathologists of Australasia, Sydney, New South Wales, Australia
| | - Thiru Vanniasinkam
- School of Biomedical Sciences, Charles Sturt University, New South Wales, Australia
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11
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Pandey P, Setya D, Ranjan S, Singh MK. Comparative evaluation of DTT treated ABO isoagglutinin titres performed by two methods with solid phase red cell adhesion (SPRCA) titres. Transfus Clin Biol 2021; 28:199-205. [PMID: 33453374 DOI: 10.1016/j.tracli.2021.01.002] [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: 11/07/2020] [Revised: 01/05/2021] [Accepted: 01/05/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND AIMS Measurement of actual concentration of IgG requires methods like treatment of serum with dithiothreitol (DTT). This study was aimed at comparing of DTT treated ABO titres performed by conventional test tube technique (CTT) and column agglutination technique (CAT) with HA/SPRCA. MATERIALS AND METHODS This was a prospective, observational study conducted from October 2019 to March 2020. All consecutive A, B and O group donors who gave consent for participation were included. All samples were tested by CTT and CAT before and after DTT treatment (pCTT, pCAT) and with HA/SPRCA. RESULTS A total of 300 donors were included; 100 each from A, B and O blood group donors. Group O titres were higher than group A/B titres. Group O titres were highest when performed by pCAT, followed by pCTT and lowest by HA/SPRCA. Group A/B titres were highest when performed by HA/SPRCA, followed by pCAT and pCTT for anti-A and highest when performed by pCAT, followed by HA/SPRCA and lowest by pCTT for anti-B. CONCLUSION Results obtained by pCAT were closer to results obtained by pCTT, whereas those obtained by HA/SPRCA were variable. SPRCA offers the advantage of automation, no inter-observer variation and less time consumption because IgM interference is not observed with SPRCA, thus providing an alternative to pCTT. However, these methods cannot be used interchangeably and to discern the most suitable method, a clinical impact of these results needs to be studied.
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Affiliation(s)
- P Pandey
- Department of transfusion medicine, histocompatibility and molecular biology, Jaypee hospital, Sector-128, 201304 Noida, India.
| | - D Setya
- Department of transfusion medicine, histocompatibility and molecular biology, Jaypee hospital, Sector-128, 201304 Noida, India.
| | - S Ranjan
- Department of transfusion medicine, histocompatibility and molecular biology, Jaypee hospital, Sector-128, 201304 Noida, India.
| | - M K Singh
- Department of transfusion medicine, histocompatibility and molecular biology, Jaypee hospital, Sector-128, 201304 Noida, India.
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