Human Immunoglobulin E specific for Taxodium distichum pollen (IgE (anti-Taxodium distichum))

Human Immunoglobulin E (IgE) antibodies specific for Taxodium distichum (bald cypress) pollen epitopes are the primary mediators of allergic hypersensitivity to this tree species, which is a significant cause of winter pollinosis in regions like Japan and the Southern United States (Arilla et al., 2004). These antibodies are produced by B cells following sensitization to allergens such as Tax d 1, a pectate lyase that exhibits high cross-reactivity with allergens from other Cupressaceae species like Cryptomeria japonica (WHO/IUIS Allergen Nomenclature). The IgE molecules circulate in the blood and bind to high-affinity FcεRI receptors on mast cells and basophils. Upon subsequent exposure to Taxodium distichum pollen, the allergens cross-link the receptor-bound IgE, triggering the degranulation of these cells and the release of inflammatory mediators like histamine and leukotrienes (Galli et al., 2012). This cascade leads to the clinical symptoms of allergic rhinitis, conjunctivitis, and asthma. Therapeutic strategies targeting these antibodies include the monoclonal antibody omalizumab, which sequesters free IgE to prevent its binding to effector cells, thereby reducing the allergic inflammatory response (Xolair Prescribing Information).

Other names

Anti-bald cypress IgETaxodium distichum-specific IgEIgE anti-Tax d 1IgE anti-Tax d 2

Monoclonal antibodies bind to the Cε3 domain of free circulating IgE, preventing its interaction with the high-affinity IgE receptor (FcεRI) on the surface of mast cells and basophils, thereby inhibiting the release of allergic mediators.