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Chen DP, Wu PY, Lin YH. Irregular Antibody Screening Using a Microdroplet Platform. BIOSENSORS 2023; 13:869. [PMID: 37754103 PMCID: PMC10526156 DOI: 10.3390/bios13090869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/29/2023] [Accepted: 08/31/2023] [Indexed: 09/28/2023]
Abstract
The screening procedure for antibodies is considered the most tedious among the three pretransfusion operations, i.e., ABO and Rhesus (Rh) typing, irregular antibody screening/identification, and crossmatching tests. The commonly used screening method for irregular antibodies in clinics at present is a manual polybrene test (MP). The MP test involves numerous reagent replacement and centrifuge procedures, and the sample volume is expected to be relatively less. Herein, screening red blood cells (RBCs) and serum irregular antibodies are encapsulated in microdroplets with a diameter of ~300 μm for a hemagglutination reaction. Owing to the advantage of spatial limitation in microdroplets, screening RBCs and irregular antibodies can be directly agglutinated, thereby eliminating the need for centrifugation and the addition of reagents to promote agglutination, as required by the MP method. Furthermore, the results for a large number of repeated tests can be concurrently obtained, further simplifying the steps of irregular antibody screening and increasing accuracy. Eight irregular antibodies are screened using the proposed platform, and the results are consistent with the MP method. Moreover, the volume of blood samples and antibodies can be reduced to 10 μL and 5 μL, respectively, which is ten times less than that using the MP method.
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Affiliation(s)
- Ding-Ping Chen
- Department of Laboratory Medicine, Chang Gung Memorial Hospital, Taoyuan City 33305, Taiwan
- Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, Taoyuan City 33302, Taiwan
| | - Pei-Yu Wu
- Department of Electronic Engineering, Chang Gung University, Taoyuan City 33302, Taiwan
| | - Yen-Heng Lin
- Department of Laboratory Medicine, Chang Gung Memorial Hospital, Taoyuan City 33305, Taiwan
- Department of Biomedical Engineering, Chang Gung University, Taoyuan City 33302, Taiwan
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Liang Y, Ren J, Zhong F, Hong W, Su Y, Wu F, Liang S, Liu J, Fang S, Liang Y, Fan X, Lin J, Liu Y, Feng B, Xu Y. Characterization of alternatively spliced transcript variants of glycophorin A and glycophorin B genes in Chinese blood donors. Vox Sang 2022; 117:715-723. [PMID: 35138639 DOI: 10.1111/vox.13252] [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: 09/06/2021] [Revised: 11/25/2021] [Accepted: 12/23/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND OBJECTIVES The molecular basis of MNS blood group variants is not fully clear yet. In this study, we have characterized mRNA variants of GYPA and GYPB genes to reveal whether alternative RNA splicing may cause antigenic diversity of the MNS system. MATERIALS AND METHODS Total RNA was extracted from peripheral blood of Chinese blood donors and full-length cDNA products were generated. A nested polymerase chain reaction (PCR)-based method was established for fragment amplification and Sanger sequencing. Resulted full-length mRNA sequences were aligned with GYPA or GYPB genomic sequences respectively for exon identification. Amino acid (AA) sequences of GPA and GPB proteins were extrapolated and GYPA-EGFP, GYPB-EGFP fusion genes were generated to monitor subcellular distribution of the encoded glycophorin (GP) proteins. RESULTS Totally 10 blood samples were analysed. GYPB mRNAs of all the subjects demonstrated frequent exon insertion or deletion whereas this kind of variation was only observed in 3 of 10 GYPA mRNA samples. None of the reported Miltenberger hybrids was detected in any of the mRNA samples. The alternative splicing resulted in changes of AA sequences in N-terminal domains where the MNS antigenic motifs resided; however, subcellular localizations of GP-EGFP fusion proteins showed that the above-mentioned AA changes did not affect cell surface distribution of the encoded GP proteins. CONCLUSIONS Alternative RNA splicing may influence the antigenic features of GP proteins but not their cell surface distribution. Therefore, GYPA and GYPB mRNA characterization might be an invaluable supplement to serological phenotyping and DNA-based genotyping in MNS blood grouping.
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Affiliation(s)
- Yanlian Liang
- Shenzhen Blood Centre, Shenzhen Institute of Transfusion Medicine, Shenzhen, People's Republic of China
| | - Jianwei Ren
- Centre for Regenerative Medicine and Health, Hong Kong Institute of Science & Innovation, Chinese Academy of Sciences, Hong Kong, People's Republic of China.,R&D Division, Shenzhen Ritzcon Biological Technology Co., Ltd., Shenzhen, People's Republic of China.,School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
| | - Fuling Zhong
- Shenzhen Blood Centre, Shenzhen Institute of Transfusion Medicine, Shenzhen, People's Republic of China
| | - Wenxu Hong
- Shenzhen Blood Centre, Shenzhen Institute of Transfusion Medicine, Shenzhen, People's Republic of China
| | - Yuqing Su
- Shenzhen Blood Centre, Shenzhen Institute of Transfusion Medicine, Shenzhen, People's Republic of China
| | - Fan Wu
- Shenzhen Blood Centre, Shenzhen Institute of Transfusion Medicine, Shenzhen, People's Republic of China
| | - Shuang Liang
- Shenzhen Blood Centre, Shenzhen Institute of Transfusion Medicine, Shenzhen, People's Republic of China
| | - Jun Liu
- R&D Division, Shenzhen Ritzcon Biological Technology Co., Ltd., Shenzhen, People's Republic of China
| | - Shuanghua Fang
- R&D Division, Shenzhen Ritzcon Biological Technology Co., Ltd., Shenzhen, People's Republic of China
| | - Yanwen Liang
- R&D Division, Shenzhen Ritzcon Biological Technology Co., Ltd., Shenzhen, People's Republic of China
| | - Xiuchu Fan
- R&D Division, Shenzhen Ritzcon Biological Technology Co., Ltd., Shenzhen, People's Republic of China
| | - Jiansuo Lin
- R&D Division, Shenzhen Ritzcon Biological Technology Co., Ltd., Shenzhen, People's Republic of China
| | - Yi Liu
- Guangdong Key Laboratory for Research and Development of Natural Drugs, Department of Pharmacology, Marine Medicine Research Institute, Guangdong Medical University, Zhanjiang, People's Republic of China
| | - Bo Feng
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
| | - Yunping Xu
- Shenzhen Blood Centre, Shenzhen Institute of Transfusion Medicine, Shenzhen, People's Republic of China
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Blomme S, De Maertelaere E, Verhoye E. A comparison of three column agglutination tests for red blood cell alloantibody identification. BMC Res Notes 2020; 13:129. [PMID: 32131887 PMCID: PMC7057655 DOI: 10.1186/s13104-020-04974-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Accepted: 02/24/2020] [Indexed: 11/17/2022] Open
Abstract
Objective Commercial kits of column tests for pre-transfusion testing have progressively replaced conventional tube tests in most laboratories. Aim of this study was to compare three commercial test cell panels for the identification of irregular red blood cell (RBC) alloantibodies. Overall, 44 samples with a positive indirect antiglobulin test (IAT) by routine testing were used for comparison of following panels: Ortho RESOLVE® panelC (Ortho Clinical Diagnostics (OCD), Milan, Italy), ID-DiaPanel(-P) (Bio-Rad Laboratories, CA, USA) and Identisera Diana(P) (Grifols, Barcelona, Spain). Column agglutination techniques were used, with microtubes containing either microgel (Bio-Rad/Grifols) or glass bead microparticles (Ortho). Results Alloantibody identification was possible in 38 samples, of which identical identification was shown in 33 samples by all methods. The remaining samples showed differences between certain methods, with the gel card system being superior to the glass card system for analyzing stored samples Considering that not all samples were evaluated in all three methods, the concordance rate reached 100% between Bio-Rad and Grifols, 90.5% between Bio-Rad and OCD, 86.5% between OCD and Grifols and 90.5% between all methods. Although differences in sensitivities were seen for specific antibodies, the three methods showed comparable performance for the identification of RBC alloantibodies.
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Affiliation(s)
- Siska Blomme
- Clinical Department of Laboratory Medicine, University Hospitals, Herestraat, 49 3000, Leuven, Belgium.
| | - Emilie De Maertelaere
- Clinical Department of Laboratory Medicine, University Hospitals, St. Pietersnieuwstraat 33, 9000, Ghent, Belgium
| | - Eline Verhoye
- Clinical Departments of Laboratory Medicine, AZ Delta Hospital, Ardooisesteenweg 276, 8800, Roeselare, Belgium
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Sun JB. The prenatal intervention of pregnancy complicated with anti-Kell isoimmunization: a review. J Matern Fetal Neonatal Med 2019; 34:2893-2899. [PMID: 31571493 DOI: 10.1080/14767058.2019.1671330] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Since the first case of the hemolytic disease of the fetus and newborn (HDFN) caused by anti-K was reported in 1946, the fetal diagnosis of K-HDFN has made rapid progress from invasive immunological and biochemical tests to noninvasive Doppler ultrasound and molecular biology techniques. However, its treatment, especially prenatal intervention, has developed slowly compared with RhD-HDFN. This review attempts to clarify the current key points and explore the direction of the next phase by systematically reviewing the development of diagnosis and treatment of this disease, which involving multidisciplinary participation.
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Affiliation(s)
- Jun-Bo Sun
- Department of Blood Transfusion, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, PR China
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Sawierucha J, Posset M, Hähnel V, Johnson CL, Hutchinson JA, Ahrens N. Comparison of two column agglutination tests for red blood cell antibody testing. PLoS One 2019; 13:e0210099. [PMID: 30596807 PMCID: PMC6312228 DOI: 10.1371/journal.pone.0210099] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 12/16/2018] [Indexed: 11/25/2022] Open
Abstract
Background Several sensitive methods are available for red blood cell (RBC) antibody screening. Among these, gel and glass card systems have demonstrated comparably good performance in retrospective studies and are widely used in routine patient diagnostics, but their performance in prospective studies has not been sufficiently characterised. Patients and methods Gel card (Bio-Rad DiaMed) and glass bead-based (Ortho Clinical Diagnostics) column agglutination technologies were used to screen for antibodies prospectively (group A) and for antibody identification in stored and fresh samples known to contain RBC antibodies retrospectively (group B). Untreated reagent RBCs and either papain-treated (Bio-Rad) or ficin-treated panel C cells (Ortho) were used for antibody identification. Results RBC-reactive antibodies were detected in 22 of 1000 group A samples, three of which tested positive only by gel card agglutination, and four only by glass bead agglutination (including one false positive each). Group B comprised 202 sera with known antibodies: 33 of these samples contained 36 antibodies detected only by gel card agglutination, whereas 9 samples contained antibodies detectable only by glass bead-based agglutination. Discrepancies mostly involved weak antibodies reactive by enzyme only. Two sera contained antibody mixtures that neither system detected completely. Of note, in antibody differentiation batches one and two, anti-Lua was reactive in 7 of 7 and 1 of 8 samples, respectively. Conclusion Both column agglutination tests for red cell antibodies had equal sensitivity and specificity with unstored samples. In stored samples, weak and enzyme-only antibodies were more frequently detected with the gel card system.
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Affiliation(s)
- Jonas Sawierucha
- Institute for Clinical Chemistry and Laboratory Medicine, Transfusion Medicine, University Hospital Regensburg, Regensburg, Germany
| | - Marion Posset
- Institute for Clinical Chemistry and Laboratory Medicine, Transfusion Medicine, University Hospital Regensburg, Regensburg, Germany
| | - Viola Hähnel
- Institute for Clinical Chemistry and Laboratory Medicine, Transfusion Medicine, University Hospital Regensburg, Regensburg, Germany
| | - Christian L. Johnson
- Institute for Clinical Chemistry and Laboratory Medicine, Transfusion Medicine, University Hospital Regensburg, Regensburg, Germany
| | | | - Norbert Ahrens
- Institute for Clinical Chemistry and Laboratory Medicine, Transfusion Medicine, University Hospital Regensburg, Regensburg, Germany
- * E-mail:
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