Pattern-recognition and endocytic receptors on dendritic cells

Pattern-recognition and endocytic receptors on dendritic cells (DCs) represent a heterogeneous group of proteins that serve as the primary sensors of the innate immune system. These receptors, which include Toll-like receptors (TLRs), C-type lectin receptors (CLRs), and NOD-like receptors (NLRs), are specialized to detect pathogen-associated molecular patterns (PAMPs) and damage-associated molecular patterns (DAMPs) (PMID: 21368830). Beyond simple recognition, many of these receptors, such as DC-SIGN (CD209) and DEC-205 (CD205), function as endocytic machinery that internalizes antigens for processing and subsequent presentation to T cells, thereby bridging innate and adaptive immunity (PMID: 16037824). In clinical practice, these receptors are targeted to modulate immune responses; for instance, TLR agonists like imiquimod and monophosphoryl lipid A are used as vaccine adjuvants or topical treatments to enhance anti-tumor or anti-viral activity (PMID: 24037444). Conversely, dysregulation of these pathways is implicated in chronic inflammatory and autoimmune diseases, making them targets for potential inhibitory therapies.

Other names

Pattern recognition receptorsPRRsEndocytic receptorsDendritic cell surface receptorsPathogen recognition receptors

Agonism of pattern-recognition receptors triggers dendritic cell maturation and cytokine production, while targeting endocytic receptors facilitates antigen uptake and cross-presentation to T cells.