B-cell receptor specific for Pleospora herbarum epitopes (BCR) (BCR (Pleospora herbarum))

B-cell receptors (BCRs) specific for Pleospora herbarum epitopes are membrane-bound immunoglobulins on B lymphocytes that recognize allergenic proteins from the fungus Pleospora herbarum, also known as Stemphylium herbarum (WHO/IUIS Allergen Nomenclature, 2023). These receptors are central to the allergic cascade, as their engagement by fungal antigens like Ple h 1 triggers B-cell activation, antigen processing, and the subsequent production of allergen-specific IgE antibodies (Janeway's Immunobiology, 9th ed.). This IgE-mediated pathway is a primary driver of type I hypersensitivity reactions, manifesting as allergic rhinitis and fungal-induced asthma (Simon-Nobbe et al., 2008). In the context of therapeutic development, these BCRs are the functional targets of allergen-specific immunotherapy (AIT), which aims to reprogram the immune system toward tolerance by inducing regulatory T cells and protective IgG4 antibodies (Akdis & Akdis, 2014). While current treatments often use crude fungal extracts, there is a growing focus on recombinant epitopes and BCR-modulating biologics to improve safety and efficacy (Valenta et al., 2011). Monitoring the frequency and signaling state of these specific B-cell populations serves as a critical biomarker for assessing the success of desensitization protocols (Jutel et al., 2015). The structural characterization of these BCRs and their cognate epitopes is essential for the design of next-generation vaccines that minimize IgE cross-linking while maintaining T-cell reactivity (Akdis, 2014).

Other names

Pleospora herbarum-specific B-cell receptorStemphylium herbarum-specific BCRPle h 1-specific B-cell receptorFungal-specific B-cell receptor

Induction of immune tolerance through allergen-specific immunotherapy (AIT), which modulates B-cell and T-cell responses to reduce IgE production and increase protective IgG4 levels.