Dendritic cell-associated C-type lectin 1 (Dectin-1) (Dectin-1)

Dendritic cell-associated C-type lectin 1 (Dectin-1) is a key pattern recognition receptor (PRR) primarily expressed on the surface of myeloid cells, such as macrophages, dendritic cells, and neutrophils (UniProt Q9BXN2). It specifically recognizes beta-1,3-glucans and beta-1,6-glucans, which are major components of fungal cell walls and certain plants (PubMed: 19592219). Upon ligand binding, Dectin-1 initiates a signaling cascade through its cytoplasmic immunoreceptor tyrosine-based activation motif (ITAM)-like motif, recruiting Spleen Tyrosine Kinase (Syk) to trigger phagocytosis, the respiratory burst, and the secretion of pro-inflammatory cytokines like IL-6 and TNF-alpha (PubMed: 28930664). This receptor is essential for the host defense against fungal pathogens and plays a significant role in modulating adaptive immunity by promoting Th1 and Th17 cell differentiation. In therapeutic development, Dectin-1 is targeted by beta-glucan-based agonists like Imprime PGG to stimulate the immune system in cancer patients, aiming to enhance the anti-tumor activity of innate effector cells (ClinicalTrials.gov). However, its over-activation can contribute to chronic inflammatory conditions, making it a complex target for immunomodulation.

Other names

C-type lectin domain family 7 member ACLEC7ABeta-glucan receptorBGRCLECSF12CD369CANDF4

Agonism of Dectin-1 triggers Syk-dependent signaling pathways, leading to the activation of NF-kappaB and the production of pro-inflammatory cytokines, which enhances the innate immune response against pathogens and tumors.