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Fusco C, Cervelli C, Dal Mas A, Canossi A, Azzarone R, Valdez O, Auriemma L, Madalese D, Maisto G, Toriello M, Penta de Vera d'Aragona R, Scimitarra M, Scarnecchia MA, Battistoni C, Fracassi D, Papola F. Expression profile of HLA-B*38:55Q allele. HLA 2020; 95:449-456. [PMID: 31891446 DOI: 10.1111/tan.13790] [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: 07/31/2019] [Revised: 11/24/2019] [Accepted: 12/30/2019] [Indexed: 11/29/2022]
Abstract
The identification of null or questionably expressed HLA allelic variants is a major issue in HLA diagnostics, because the mistyping of the aberrant expression of such alleles can have a major impact on the outcome of both hematopoietic stem cell transplantation (HSCT) and solid organ transplants. It is debated how questionable (Q) alleles, because of their unknown expression profile, should be considered in an allogenic HSCT setting. The HLA-B*38:55Q allele was detected as an HLA-B blank specificity; DNA sequencing identified a single polymorphism at position 373 in exon 3 (TGC > CGC), which results in the replacement of cysteine 101 with an arginine in the HLA-B heavy chain, thus, impairing disulfide bridge formation in the alpha-2 domain, essential for the normal expression of the HLA molecules. In order to determine the RNA and protein expression profile of this allelic variant, we analyzed antigenic expression at different levels, transcriptional and transductional, using a combination of cellular methods, such as serological testing and flow cytometric analysis, polymerase chain reaction (PCR) sequence-specific primer (SSP) cDNA group-specific amplification and immunocytochemical assay, demonstrating the prevalent cytoplasmatic distribution of the HLA-B*38:55Q protein. Our findings suggest that in matching process the HLA-B*38:55Q allele needs to be considered as a low expressed allele, able to elicit an allogenic T-cell response in vivo and impair the transplant outcome.
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Affiliation(s)
- Caterina Fusco
- SSD Cryopreservation and Ba.S.C.O, Oncohaematology Department, A.O.R.N. Santobono-Pausilipon of Napoli, Naples, Italy
| | - Carla Cervelli
- Regional Centre of Immunohaematology and Tissue Typing, S.Salvatore Hospital of L'Aquila, L'Aquila, Italy
| | - Antonella Dal Mas
- UOC Pathological Anatomy, S.Salvatore Hospital of L'Aquila, L'Aquila, Italy
| | - Angelica Canossi
- CNR Institute of Translational Pharmacology, L'Aquila, L'Aquila, Italy
| | - Raffaella Azzarone
- Regional Centre of Immunohaematology and Tissue Typing, S.Salvatore Hospital of L'Aquila, L'Aquila, Italy
| | - Olaida Valdez
- Regional Centre of Immunohaematology and Tissue Typing, S.Salvatore Hospital of L'Aquila, L'Aquila, Italy
| | - Laura Auriemma
- SSD Cryopreservation and Ba.S.C.O, Oncohaematology Department, A.O.R.N. Santobono-Pausilipon of Napoli, Naples, Italy
| | - Donato Madalese
- SSD Cryopreservation and Ba.S.C.O, Oncohaematology Department, A.O.R.N. Santobono-Pausilipon of Napoli, Naples, Italy
| | - Giovanna Maisto
- SSD Cryopreservation and Ba.S.C.O, Oncohaematology Department, A.O.R.N. Santobono-Pausilipon of Napoli, Naples, Italy
| | - Mario Toriello
- SSD Cryopreservation and Ba.S.C.O, Oncohaematology Department, A.O.R.N. Santobono-Pausilipon of Napoli, Naples, Italy
| | | | - Maria Scimitarra
- Regional Centre of Immunohaematology and Tissue Typing, S.Salvatore Hospital of L'Aquila, L'Aquila, Italy
| | - Maria A Scarnecchia
- Regional Centre of Immunohaematology and Tissue Typing, S.Salvatore Hospital of L'Aquila, L'Aquila, Italy
| | - Carla Battistoni
- Regional Centre of Immunohaematology and Tissue Typing, S.Salvatore Hospital of L'Aquila, L'Aquila, Italy
| | - Daniela Fracassi
- Regional Centre of Immunohaematology and Tissue Typing, S.Salvatore Hospital of L'Aquila, L'Aquila, Italy
| | - Franco Papola
- Regional Centre of Immunohaematology and Tissue Typing, S.Salvatore Hospital of L'Aquila, L'Aquila, Italy
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Serçinoğlu O, Ozbek P. Computational characterization of residue couplings and micropolymorphism-induced changes in the dynamics of two differentially disease-associated human MHC class-I alleles. J Biomol Struct Dyn 2017; 36:724-740. [DOI: 10.1080/07391102.2017.1295884] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Onur Serçinoğlu
- Department of Bioengineering, Institute of Pure and Applied Sciences, Marmara University, Istanbul, Turkey
- Faculty of Engineering, Department of Bioengineering, Marmara University, Istanbul, Turkey
| | - Pemra Ozbek
- Faculty of Engineering, Department of Bioengineering, Marmara University, Istanbul, Turkey
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