Back to Search
Start Over
HLA-DPB1 Mismatching Results in the Generation of a Full Repertoire of HLA-DPB1-Specific CD4+ T Cell Responses Showing Immunogenicity of all HLA-DPB1 Alleles
- Source :
-
Biology of Blood & Marrow Transplantation . Sep2010, Vol. 16 Issue 9, p1282-1292. 11p. - Publication Year :
- 2010
-
Abstract
- Clinical studies have indicated that HLA-DPB1 functions as a classical transplantation antigen in allogeneic stem cell transplantation. Mismatching for HLA-DPB1 was associated with an increased risk of graft-versus-host disease (GVHD), but also a decreased risk of disease relapse. However, specific HLA-DPB1 mismatches were associated with poor clinical outcome. It was suggested that this unfavorable effect was caused by a difference in immunogenicity between HLA-DPB1 alleles. To analyze whether immunogenicity of HLA-DPB1 mismatches could be predicted based on the presence or absence of specific amino acid sequences we developed a model to generate allo-HLA-DPB1 responses in vitro. We tested in total 48 different stimulator/responder combinations by stimulating CD4+ T cells from 5 HLA-DPB1 homozygous individuals with the same antigen-presenting cells transduced with different allo-HLA-DPB1 molecules. HLA-DPB1 molecules used for stimulation comprised 76% to 99% of HLA-DPB1 molecules present in different ethnic populations. We show that all HLA-DPB1 mismatches as defined by allele typing resulted in high-frequency immune responses. Furthermore, we show that crossrecognition of different HLA-DPB1 molecules is a broadly observed phenomenon. We confirm previously described patterns in crossrecognition, and demonstrate that a high degree in similarity between HLA-DPB1 molecules is predictive for crossrecognition, but not for immunogenicity. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10838791
- Volume :
- 16
- Issue :
- 9
- Database :
- Academic Search Index
- Journal :
- Biology of Blood & Marrow Transplantation
- Publication Type :
- Academic Journal
- Accession number :
- 52878034
- Full Text :
- https://doi.org/10.1016/j.bbmt.2010.03.018