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Yin Y, Soe NN, Valenzuela NM, Reed EF, Zhang Q. HLA-DPB1 genotype variants predict DP molecule cell surface expression and DP donor specific antibody binding capacity. Front Immunol 2024; 14:1328533. [PMID: 38274830 PMCID: PMC10808447 DOI: 10.3389/fimmu.2023.1328533] [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: 10/26/2023] [Accepted: 12/21/2023] [Indexed: 01/27/2024] Open
Abstract
The contribution of alloresponses to mismatched HLA-DP in solid organ transplantation and hematopoietic stem cell transplantation (HCT) has been well documented. Exploring the regulatory mechanisms of DPB1 alleles has become an important question to be answered. In this study, our initial investigation focused on examining the correlation between the rs9277534G/A SNP and DPB1 mRNA expression. The result showed that there was a significant increase in DPB1 mRNA expression in B lymphoblastoid cell lines (BLCLs) with the rs9277534GG genotype compared to rs9277534AA genotype. In addition, B cells with the rs9277534GG exhibited significantly higher DP protein expression than those carrying the rs9277534AA genotype in primary B cells. Furthermore, we observed a significant upregulation of DP expression in B cells following treatment with Interleukin 13 (IL-13) compared to untreated B cells carrying rs9277534GG-linked DPB1 alleles. Fluorescence in situ hybridization (FISH) analysis of DPB1 in BLCL demonstrated significant differences in both the cytoplasmic (p=0.0003) and nuclear (p=0.0001) localization of DP mRNA expression comparing DPB1*04:01 (rs9277534AA) and DPB1*05:01 (rs9277534GG) homozygous cells. The study of the correlation between differential DPB1 expression and long non-coding RNAs (lncRNAs) showed that lnc-HLA-DPB1-13:1 is strongly associated with DP expression (r=0.85), suggesting the potential involvement of lncRNA in regulating DP expression. The correlation of DP donor specific antibody (DSA) with B cell flow crossmatch (B-FCXM) results showed a better linear correlation of DP DSA against GG and AG donor cells (R2 = 0.4243, p=0.0025 and R2 = 0.6172, p=0.0003, respectively), compared to DSA against AA donor cells (R2 = 0.0649, p=0.4244). This explained why strong DP DSA with a low expression DP leads to negative B-FCXM. In conclusion, this study provides evidence supporting the involvement of lncRNA in modulating HLA-DP expression, shedding lights on the intricate regulatory mechanisms of DP, particularly under inflammatory conditions in transplantation.
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Affiliation(s)
- Yuxin Yin
- UCLA Immunogenetics Center, Department of Pathology & Laboratory Medicine, Los Angeles, CA, United States
| | - Nwe Nwe Soe
- Department of Pathology, AdventHealth Tissue Typing Laboratory, Orlando, FL, United States
| | - Nicole M. Valenzuela
- UCLA Immunogenetics Center, Department of Pathology & Laboratory Medicine, Los Angeles, CA, United States
| | - Elaine F. Reed
- UCLA Immunogenetics Center, Department of Pathology & Laboratory Medicine, Los Angeles, CA, United States
| | - Qiuheng Zhang
- UCLA Immunogenetics Center, Department of Pathology & Laboratory Medicine, Los Angeles, CA, United States
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Battle R, Pritchard D, Peacock S, Hastie C, Worthington J, Jordan S, McCaughlan JA, Barnardo M, Cope R, Collins C, Diaz-Burlinson N, Rosser C, Foster L, Kallon D, Shaw O, Briggs D, Turner D, Anand A, Akbarzad-Yousefi A, Sage D. BSHI and BTS UK guideline on the detection of alloantibodies in solid organ (and islet) transplantation. Int J Immunogenet 2023; 50 Suppl 2:3-63. [PMID: 37919251 DOI: 10.1111/iji.12641] [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: 10/02/2023] [Accepted: 10/04/2023] [Indexed: 11/04/2023]
Abstract
Solid organ transplantation represents the best (and in many cases only) treatment option for patients with end-stage organ failure. The effectiveness and functioning life of these transplants has improved each decade due to surgical and clinical advances, and accurate histocompatibility assessment. Patient exposure to alloantigen from another individual is a common occurrence and takes place through pregnancies, blood transfusions or previous transplantation. Such exposure to alloantigen's can lead to the formation of circulating alloreactive antibodies which can be deleterious to solid organ transplant outcome. The purpose of these guidelines is to update to the previous BSHI/BTS guidelines 2016 on the relevance, assessment, and management of alloantibodies within solid organ transplantation.
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Affiliation(s)
- Richard Battle
- Scottish National Blood Transfusion Service, Edinburgh, UK
| | | | - Sarah Peacock
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | | | | | - Sue Jordan
- National Blood Service Tooting, London, UK
| | | | - Martin Barnardo
- Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Rebecca Cope
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | | | | | | | - Luke Foster
- Birmingham Blood Donor Centre, Birmingham, UK
| | | | - Olivia Shaw
- Guy's and St Thomas' NHS Foundation Trust, London, UK
| | | | - David Turner
- Scottish National Blood Transfusion Service, Edinburgh, UK
| | - Arthi Anand
- Imperial College Healthcare NHS Trust, London, UK
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Hu Q, Burns C, Christian D, Yang G, Berka N. Discovery of three novel HLA-DPA1 alleles, HLA-DPA1*01:147N, 01:03:47, and 02:106 using next-generation sequencing. HLA 2023. [PMID: 37315941 DOI: 10.1111/tan.15125] [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: 05/16/2023] [Revised: 05/23/2023] [Accepted: 05/25/2023] [Indexed: 06/16/2023]
Abstract
Characterization of three novel HLA-DPA1 alleles bearing null, synonymous, and non-synonymous mutations.
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Affiliation(s)
- Qian Hu
- Histocompatibility and Immunogenetics Laboratory, Alberta Precision Laboratories, Calgary, Canada
- Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, Canada
| | - Caitlyn Burns
- Histocompatibility and Immunogenetics Laboratory, Alberta Precision Laboratories, Calgary, Canada
| | - Danielle Christian
- Histocompatibility and Immunogenetics Laboratory, Alberta Precision Laboratories, Calgary, Canada
| | - Guang Yang
- Histocompatibility and Immunogenetics Laboratory, Alberta Precision Laboratories, Calgary, Canada
| | - Noureddine Berka
- Histocompatibility and Immunogenetics Laboratory, Alberta Precision Laboratories, Calgary, Canada
- Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, Canada
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