Grass pollen allergen-specific Immunoglobulin E and Immunoglobulin G (IgE/IgG (Grass Pollen))

This target refers to the complex of polyclonal Immunoglobulin E (IgE) and Immunoglobulin G (IgG) antibodies specific to grass pollen allergens as they interact with receptors on immune effector cells like mast cells and basophils (Gould & Sutton, 2008). In allergic individuals, grass pollen-specific IgE is predominantly bound to the high-affinity FcεRI receptor, sensitizing the cell to subsequent allergen exposure (Galli & Tsai, 2012). When grass pollen allergens (e.g., Phl p 1, Phl p 5) cross-link these receptor-bound IgE molecules, it triggers the immediate release of inflammatory mediators, resulting in the symptoms of seasonal allergic rhinitis or asthma (Shamji & Durham, 2017). Conversely, allergen-specific IgG antibodies, particularly the IgG4 subclass, act as "blocking antibodies" that can intercept allergens before they reach cell-bound IgE or engage inhibitory receptors like FcγRIIb on the same effector cells to dampen the allergic response (Akdis & Akdis, 2011). Therapeutic interventions such as allergen-specific immunotherapy (AIT) aim to modulate this antibody balance, increasing the ratio of protective IgG to pathogenic IgE (Jutel et al., 2013). Monoclonal antibodies like omalizumab further intervene by sequestering free IgE, thereby reducing the density of IgE on the surface of these effector cells over time (Bousquet et al., 2011).

Other names

Grass pollen-specific antibodiesAllergen-specific IgE and IgGPollen-specific immunoglobulinsGrass pollen-specific IgE/IgG4

Neutralization of circulating IgE to prevent receptor binding and induction of IgG4 blocking antibodies to compete for allergen binding and signal through inhibitory receptors.