C-type lectin domain family 7 member A (CLEC7A)

Immune cell pattern recognition receptors for beta-glucans, primarily represented by C-type lectin domain family 7 member A (Dectin-1), are critical sensors of the innate immune system that detect beta-1,3 and beta-1,6-linked glucans found in fungal cell walls and certain cereals. Upon binding these carbohydrate ligands, these receptors—which also include Complement Receptor 3 (CR3) and Toll-like receptors—initiate intracellular signaling pathways involving Syk kinase and Card9, leading to the activation of macrophages, dendritic cells, and neutrophils. This activation results in the production of pro-inflammatory cytokines, enhanced phagocytosis, and the induction of trained immunity, which provides a heightened state of readiness against subsequent infections. In the context of oncology, targeting these receptors with beta-glucan agonists is being explored to repolarize immunosuppressive tumor-associated macrophages into a tumoricidal M1-like phenotype. Additionally, these receptors play significant roles in the pathogenesis of inflammatory bowel disease and the host defense against invasive fungal infections like candidiasis and aspergillosis.

Other names

Dectin-1Beta-glucan receptorCLEC7AC-type lectin superfamily member 12CLECSF12CANDF4BGRImmune cell pattern recognition receptors for beta-glucans

Agonism of pattern recognition receptors (primarily Dectin-1) on innate immune cells, triggering Syk-mediated signaling cascades that lead to cytokine production, phagocytosis, and enhanced antimicrobial/antitumor activity.