ArticleHaematologica2025
FVIII peptides presented on HLA-DP and identification of an A3 domain peptide binding with high affinity to the commonly expressed HLA-DP4.
Article in Haematologica, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Immunogenic implications of translational readthrough modulate the association of F8 nonsense mutations with inhibitors in Hemophilia A.Molecular medicine (Cambridge, Mass.) · 2026Article
- Deleterious variants cluster in the A3 domain of factor VIII in people with severe hemophilia A and inhibitors.Research and practice in thrombosis and haemostasis · 2025Article
- MAPPs assays for non-clinical immunogenicity risk assessment: best practices recommended by the European immunogenicity platform.Frontiers in immunology · 2025Review
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Authors and funding
12 authors.
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No grant is acknowledged in the PubMed record.
Abstract
The development of neutralizing antibodies (inhibitors) against coagulation factor VIII (FVIII) poses a major challenge in hemophilia A (HA) treatment. The formation of FVIII inhibitors is a CD4+ T-cell-dependent mechanism which includes antigen presenting cells (APC), B- and T-helper lymphocytes. APC present FVIII-derived peptides on major histocompatibility complex class II (MHC-II) to CD4+ T cells. We previously established a mass spectrometry-based approach to delineate the FVIII repertoire presented on HLA-DR and HLA-DQ. In this study, specific attention was directed towards the identification of FVIII peptides presented on HLA-DP. A data-set of naturally processed FVIII peptides was generated by incubating human FVIII with immature monocyte-derived dendritic cells (moDC) from HLA-typed healthy donors. Using this method, we identified 176 to 1,352 different HLA-DP presented peptides per donor, including 26 different FVIII-derived peptides. The most frequently presented peptides derived from the A3 and C2 domains of FVIII. Comparison of the FVIII repertoire presented on HLA-DP with that presented on HLA-DR revealed considerable overlap but also suggested preferential presentation of specific peptides on either HLA-DR or HLA-DP. Fourteen FVIII peptides presented on HLA-DP were synthesized and evaluated for their binding ability to the commonly expressed HLA-DP4 molecule which is highly prevalent in the Caucasian population. Peptide binding studies showed that 7 of 14 peptides competed with a reference peptide to HLA-DP4. Interestingly, an A3 domain-derived peptide bound with high affinity to HLA-DP4, positioning this peptide as a prime candidate for the development of novel peptide-based tolerogenic strategies for FVIII inhibitors.
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