C-type lectin domain family 7 member A (CLEC7A) (Dectin-1)

C-type lectin domain family 7 member A (CLEC7A), commonly known as Dectin-1, is a type II transmembrane pattern recognition receptor primarily expressed on myeloid cells, including macrophages, dendritic cells, and neutrophils [1, 12]. It serves as the principal receptor for beta-1,3-linked and beta-1,6-linked glucans, which are essential structural components of fungal cell walls [3, 17]. Upon ligand binding, Dectin-1 initiates a signaling cascade through its cytoplasmic hemITAM motif and Spleen Tyrosine Kinase (Syk), leading to the activation of NF-kappaB and the subsequent production of pro-inflammatory cytokines and reactive oxygen species [7, 15]. This receptor plays a vital role in antifungal immunity and is increasingly targeted in cancer immunotherapy, where beta-glucan agonists are used to prime the innate immune system to enhance the efficacy of monoclonal antibodies [6, 16]. Beyond infection and oncology, Dectin-1 is involved in sterile inflammation, neurodegenerative conditions like Alzheimer's disease, and metabolic disorders, where its modulation can either promote protective immune responses or contribute to pathological inflammation [1, 10, 12]. Therapeutic strategies currently focus on utilizing Dectin-1 agonists as immunomodulators or developing inhibitors to manage chronic inflammatory diseases [7, 8].

Other names

Beta-glucan receptorBGRCD369CANDF4CLECSF12Dendritic cell-associated C-type lectin-1

Dectin-1 agonists, such as beta-glucans, bind to the extracellular carbohydrate recognition domain, inducing receptor clustering and phosphorylation of the intracellular hemITAM motif. This recruits Spleen Tyrosine Kinase (Syk), which activates downstream signaling pathways including NF-kappaB and MAPK to stimulate the production of pro-inflammatory cytokines (e.g., TNF-alpha, IL-6) and enhance phagocytic activity against pathogens and tumor cells. Conversely, Dectin-1 inhibition or antagonism is explored to mitigate chronic neuroinflammation and sterile inflammatory responses.