Abstract
The only disease-modifying treatment available for IgE-mediated disease is specific immunotherapy, but the retention of B cell epitopes in whole allergen preparations confers a risk of IgE-mediated systemic reactions to their administration. Compelling evidence for the central role of T cells in allergic disease suggests that IgE-binding epitopes could be removed from such therapy, improving safety without affecting efficacy. Short, allergen-derived peptides lack the conformational determinants required for IgE crosslinking and are, therefore, an attractive therapeutic possibility. However, human leukocyte antigen (HLA) polymorphism means that T cell peptide epitopes present a huge diversity, which makes the design of peptide-based vaccines problematic. Over the past 10 years, advances in our understanding of epitope selection and major histocompatibility complex (MHC)–peptide–T cell receptor interactions have taken this therapy forward to early clinical trials with human volunteers.
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