Dendritic cell surface receptors and signaling machinery engaged by ArtCaM and other allergens (DC-Allergen Receptors)

The term refers to a complex network of pattern recognition receptors (PRRs) and downstream signaling molecules on dendritic cells (DCs) that specifically interact with allergens like ArtCaM (Artemisia vulgaris Calmodulin, also known as Art v 6). These receptors, primarily including C-type lectin receptors (CLRs) and Toll-like receptors (TLRs), detect specific structural motifs or enzymatic activities of allergens to initiate immune responses. Upon binding, these receptors trigger intracellular signaling cascades involving molecules like Syk, Raf-1, or MyD88, which ultimately lead to DC maturation and the secretion of cytokines that drive Th2 cell differentiation. This machinery is a critical checkpoint in the sensitization phase of allergic diseases, as it determines whether an inhaled or ingested protein is perceived as harmless or as a threat requiring an IgE-mediated response. While not a single therapeutic target, the components of this machinery are being investigated for their potential to be modulated in allergen-specific immunotherapy or to prevent the onset of allergic sensitization.

Other names

Allergen-binding dendritic cell receptorsArt v 6-interacting receptorsC-type lectin receptors on dendritic cellsPattern recognition receptors for allergens

The machinery involves the recognition of allergen-associated molecular patterns (AAMPs) by pattern recognition receptors (PRRs) such as C-type lectin receptors (e.g., MR, DC-SIGN) and TLRs, leading to the activation of Syk or MyD88-dependent signaling pathways that polarize T-cell responses toward a Th2 phenotype.