Innate immune signaling in epithelial and dendritic cells

Innate immune signaling in epithelial and dendritic cells is a coordinated biological process essential for maintaining mucosal homeostasis and initiating host defense (Swamy et al., 2010, Nature Immunology). Epithelial cells function as the primary sensors of the environment, utilizing pattern recognition receptors (PRRs) like Toll-like receptors (TLRs) to detect microbial-associated molecular patterns (MAMPs) and initiate signaling cascades (Akira et al., 2006, Cell). Upon activation, these cells release signaling molecules such as cytokines (e.g., TSLP, IL-33) and chemokines that recruit and instruct dendritic cells (DCs), the professional antigen-presenting cells of the immune system (Holgate, 2012, Clinical & Experimental Allergy). The DCs then process antigens and migrate to lymphoid tissues to activate the adaptive immune system, forming a critical bridge between innate and acquired immunity. Dysregulation of this signaling axis is central to the pathogenesis of chronic inflammatory conditions like asthma, inflammatory bowel disease, and psoriasis (Geremia et al., 2014, Nature Reviews Gastroenterology & Hepatology). Therapeutic interventions often target specific components of this pathway, such as TNF-alpha or IL-23, to dampen pathological inflammation (Neurath, 2014, Nature Reviews Immunology). Understanding this crosstalk is vital for developing precision medicines that can restore immune homeostasis without causing broad immunosuppression.

Other names

Epithelial-dendritic cell axisMucosal innate immune signalingInnate immune crosstalkEpithelial-DC signaling pathway

Modulation of the innate-adaptive immune interface through the inhibition of pro-inflammatory cytokines, pattern recognition receptor signaling, or downstream Janus kinase (JAK) pathways.