B-cell receptor specific for Phleum pratense allergens (BCR-Phl p)

B-cell receptors (BCRs) specific for Phleum pratense (Timothy grass) allergens are membrane-bound immunoglobulins expressed on the surface of B lymphocytes that specifically recognize and bind to pollen proteins such as Phl p 1 and Phl p 5 (Source: WHO/IUIS Allergen Nomenclature). These receptors are central to the allergic sensitization process; their activation by Timothy grass allergens triggers B-cell differentiation into plasma cells that secrete allergen-specific IgE antibodies (Source: PubMed). In sensitized individuals, subsequent exposure to Phleum pratense pollen leads to the cross-linking of these IgE antibodies on mast cells and basophils, resulting in the release of inflammatory mediators like histamine that cause hay fever and asthma symptoms. Therapeutic strategies targeting these BCRs primarily involve allergen-specific immunotherapy (AIT), which uses standardized extracts of Timothy grass to reprogram the immune system (Source: NIH/NIAID). This treatment aims to induce immune tolerance by promoting the production of 'blocking' IgG4 antibodies that compete with IgE for allergen binding, thereby preventing the allergic cascade (Source: StatPearls).

Other names

Timothy grass allergen-specific B-cell receptorPhl p-specific B-cell receptorAnti-Phl p BCRPhleum pratense-specific B-lymphocyte receptor

Allergen-specific immunotherapy (AIT) modulates B-cell receptor signaling through chronic, controlled exposure to Phleum pratense allergens, inducing immune tolerance by promoting the expansion of regulatory B cells (Bregs) and shifting antibody production from IgE to protective IgG4 blocking antibodies (Source: PubMed, Journal of Allergy and Clinical Immunology).