Grass pollen allergen-specific B-cell receptor and Immunoglobulin E (IgE) antibody

Grass pollen allergen-specific B-cell receptors (BCRs) and Immunoglobulin E (IgE) antibodies are central components of the allergic immune response to grass pollens, such as those from Timothy grass (Phleum pratense). BCRs on the surface of allergen-specific B cells recognize specific epitopes on grass pollen proteins, leading to B-cell activation, class switching, and the production of IgE (Galli & Tsai, Nature Medicine, 2012). These IgE antibodies then bind to high-affinity FcεRI receptors on mast cells and basophils. Upon subsequent exposure to the allergen, cross-linking of surface-bound IgE triggers the release of inflammatory mediators like histamine, causing symptoms of allergic rhinitis and asthma (Eckl-Dorna et al., Current Opinion in Allergy and Clinical Immunology, 2019). Therapeutic strategies targeting these molecules include monoclonal antibodies like Omalizumab, which sequesters free IgE, and allergen-specific immunotherapy (AIT), which aims to induce immune tolerance and shift the response from IgE to IgG4 production (Bousquet et al., Journal of Allergy and Clinical Immunology, 2020). This target complex is fundamental to the pathophysiology of seasonal allergies and represents a major focus for both symptomatic relief and disease-modifying treatments.

Other names

Grass pollen-specific IgEGrass pollen-specific BCRPhleum pratense-specific IgETimothy grass allergen-specific antibodiesAllergen-specific B-cell receptorPhl p 1-specific IgEPhl p 5-specific IgE

Neutralization of free IgE to prevent binding to FcεRI receptors; downregulation of FcεRI on effector cells; induction of allergen-specific IgG4 blocking antibodies; and depletion of IgE-switched B cells.