Dissecting Genetic Control of HLA-DPB1 Expression and Its Relation to Structural Mismatch Models in Hematopoietic Stem Cell Transplantation
HLA expression levels have been suggested to be genetically controlled by single nucleotide polymorphisms (SNP) in the untranslated regions (UTR), and expression variants have been associated with the outcome of chronic viral infection and hematopoietic stem cell transplantation (HSCT). In particula...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
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Frontiers Media S.A.
2018-10-01
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| Series: | Frontiers in Immunology |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fimmu.2018.02236/full |
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| author | Thuja Meurer Esteban Arrieta-Bolaños Maximilian Metzing Mona-May Langer Peter van Balen J. H. Frederik Falkenburg Dietrich W. Beelen Peter A. Horn Katharina Fleischhauer Katharina Fleischhauer Pietro Crivello |
| author_facet | Thuja Meurer Esteban Arrieta-Bolaños Maximilian Metzing Mona-May Langer Peter van Balen J. H. Frederik Falkenburg Dietrich W. Beelen Peter A. Horn Katharina Fleischhauer Katharina Fleischhauer Pietro Crivello |
| author_sort | Thuja Meurer |
| collection | DOAJ |
| description | HLA expression levels have been suggested to be genetically controlled by single nucleotide polymorphisms (SNP) in the untranslated regions (UTR), and expression variants have been associated with the outcome of chronic viral infection and hematopoietic stem cell transplantation (HSCT). In particular, the 3′UTR rs9277534-G/A SNP in HLA-DPB1 has been associated with graft-versus-host-disease after HSCT (Expression model); however its relevance in different immune cells and its mode of action have not been systematically addressed. In addition, there is a strong though not complete overlap between the rs9277534-G/A SNP and structural HLA-DPB1 T cell epitope (TCE) groups which have also been associated with HSCT outcome (TCE Structural model). Here we confirm and extend previous findings of significantly higher HLA-DPB1 expression in B cell lines, unstimulated primary B cells, and monocytes homozygous for rs9277534-G compared to those homozygous for rs9277534-A. However, these differences were abrogated by interferon-γ stimulation or differentiation into dendritic cells. We identify at least seven 3′UTR rs9277534-G/A haplotypes differing by a total of 37 SNP, also characterized by linkage to length variants of a short tandem repeat (STR) in intron 2 and TCE group assignment. 3′UTR mapping did not show any significant differences in post-transcriptional regulation assessed by luciferase assays between two representative rs9277534-G/A haplotypes for any of eight overlapping fragments. Moreover, no evidence for alternative splicing associated with the intron 2 STR was obtained by RT-PCR. In an exemplary cohort of 379 HLA-DPB1 mismatched donor-recipient pairs, risk prediction by the Expression model and the Structural TCE model was 36.7% concordant, with the majority of discordances due to non-applicability of the Expression model. HLA-DPB1 from different TCE groups expressed in the absence of the 3′UTR at similar levels by transfected HeLa cells elicited significantly different mean alloreactive CD4+ T-cell responses, as assessed by CD137 upregulation assays in 178 independent cultures. Taken together, our data provide new insights into the cell type-specific and mechanistic basis of the association between the rs9277534-G/A SNP and HLA-DPB1 expression, and show that, despite partial overlap between both models in HSCT risk-prediction, differential alloreactivity determined by the TCE structural model occurs independently from HLA-DPB1 differential expression. |
| first_indexed | 2024-12-23T10:43:14Z |
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| id | doaj.art-48b84be0fd9e4f20a176ea84f1f026c5 |
| institution | Directory Open Access Journal |
| issn | 1664-3224 |
| language | English |
| last_indexed | 2024-12-23T10:43:14Z |
| publishDate | 2018-10-01 |
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| series | Frontiers in Immunology |
| spelling | doaj.art-48b84be0fd9e4f20a176ea84f1f026c52022-12-21T17:50:07ZengFrontiers Media S.A.Frontiers in Immunology1664-32242018-10-01910.3389/fimmu.2018.02236386618Dissecting Genetic Control of HLA-DPB1 Expression and Its Relation to Structural Mismatch Models in Hematopoietic Stem Cell TransplantationThuja Meurer0Esteban Arrieta-Bolaños1Maximilian Metzing2Mona-May Langer3Peter van Balen4J. H. Frederik Falkenburg5Dietrich W. Beelen6Peter A. Horn7Katharina Fleischhauer8Katharina Fleischhauer9Pietro Crivello10Institute for Experimental Cellular Therapy, University Hospital Essen, Essen, GermanyInstitute for Experimental Cellular Therapy, University Hospital Essen, Essen, GermanyInstitute for Experimental Cellular Therapy, University Hospital Essen, Essen, GermanyInstitute for Transfusion Medicine, University Hospital Essen, Essen, GermanyDepartment of Hematology, Leiden University Medical Center, Leiden, NetherlandsDepartment of Hematology, Leiden University Medical Center, Leiden, NetherlandsDepartment of Bone Marrow Transplantation, West German Cancer Center, University Hospital Essen, Essen, GermanyInstitute for Transfusion Medicine, University Hospital Essen, Essen, GermanyInstitute for Experimental Cellular Therapy, University Hospital Essen, Essen, GermanyDeusches Konsortium für Translationale Krebsforschung (DKTK), Heidelberg, GermanyInstitute for Experimental Cellular Therapy, University Hospital Essen, Essen, GermanyHLA expression levels have been suggested to be genetically controlled by single nucleotide polymorphisms (SNP) in the untranslated regions (UTR), and expression variants have been associated with the outcome of chronic viral infection and hematopoietic stem cell transplantation (HSCT). In particular, the 3′UTR rs9277534-G/A SNP in HLA-DPB1 has been associated with graft-versus-host-disease after HSCT (Expression model); however its relevance in different immune cells and its mode of action have not been systematically addressed. In addition, there is a strong though not complete overlap between the rs9277534-G/A SNP and structural HLA-DPB1 T cell epitope (TCE) groups which have also been associated with HSCT outcome (TCE Structural model). Here we confirm and extend previous findings of significantly higher HLA-DPB1 expression in B cell lines, unstimulated primary B cells, and monocytes homozygous for rs9277534-G compared to those homozygous for rs9277534-A. However, these differences were abrogated by interferon-γ stimulation or differentiation into dendritic cells. We identify at least seven 3′UTR rs9277534-G/A haplotypes differing by a total of 37 SNP, also characterized by linkage to length variants of a short tandem repeat (STR) in intron 2 and TCE group assignment. 3′UTR mapping did not show any significant differences in post-transcriptional regulation assessed by luciferase assays between two representative rs9277534-G/A haplotypes for any of eight overlapping fragments. Moreover, no evidence for alternative splicing associated with the intron 2 STR was obtained by RT-PCR. In an exemplary cohort of 379 HLA-DPB1 mismatched donor-recipient pairs, risk prediction by the Expression model and the Structural TCE model was 36.7% concordant, with the majority of discordances due to non-applicability of the Expression model. HLA-DPB1 from different TCE groups expressed in the absence of the 3′UTR at similar levels by transfected HeLa cells elicited significantly different mean alloreactive CD4+ T-cell responses, as assessed by CD137 upregulation assays in 178 independent cultures. Taken together, our data provide new insights into the cell type-specific and mechanistic basis of the association between the rs9277534-G/A SNP and HLA-DPB1 expression, and show that, despite partial overlap between both models in HSCT risk-prediction, differential alloreactivity determined by the TCE structural model occurs independently from HLA-DPB1 differential expression.https://www.frontiersin.org/article/10.3389/fimmu.2018.02236/fullHLA-DPB1expression levelsSNPrs9277534hematopoietic stem cell transplantationhigh risk non-permissive mismatches |
| spellingShingle | Thuja Meurer Esteban Arrieta-Bolaños Maximilian Metzing Mona-May Langer Peter van Balen J. H. Frederik Falkenburg Dietrich W. Beelen Peter A. Horn Katharina Fleischhauer Katharina Fleischhauer Pietro Crivello Dissecting Genetic Control of HLA-DPB1 Expression and Its Relation to Structural Mismatch Models in Hematopoietic Stem Cell Transplantation Frontiers in Immunology HLA-DPB1 expression levels SNP rs9277534 hematopoietic stem cell transplantation high risk non-permissive mismatches |
| title | Dissecting Genetic Control of HLA-DPB1 Expression and Its Relation to Structural Mismatch Models in Hematopoietic Stem Cell Transplantation |
| title_full | Dissecting Genetic Control of HLA-DPB1 Expression and Its Relation to Structural Mismatch Models in Hematopoietic Stem Cell Transplantation |
| title_fullStr | Dissecting Genetic Control of HLA-DPB1 Expression and Its Relation to Structural Mismatch Models in Hematopoietic Stem Cell Transplantation |
| title_full_unstemmed | Dissecting Genetic Control of HLA-DPB1 Expression and Its Relation to Structural Mismatch Models in Hematopoietic Stem Cell Transplantation |
| title_short | Dissecting Genetic Control of HLA-DPB1 Expression and Its Relation to Structural Mismatch Models in Hematopoietic Stem Cell Transplantation |
| title_sort | dissecting genetic control of hla dpb1 expression and its relation to structural mismatch models in hematopoietic stem cell transplantation |
| topic | HLA-DPB1 expression levels SNP rs9277534 hematopoietic stem cell transplantation high risk non-permissive mismatches |
| url | https://www.frontiersin.org/article/10.3389/fimmu.2018.02236/full |
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