cell
Dendritic Cell
Antigen-context translator that decides priming, tolerance, and adaptive immune direction
Review layer
Last reviewed 2026-05-17
Systems teaching draft. Content is structured for education and graph expansion, with formal source tagging ready for the next review pass.
State signature
Systems profile
Graph neighborhood
Direct relationships
Antigen presentation with costimulation and cytokine context
Epithelial alarmin primes dendritic cells toward TH2 instruction
Dendritic cells translate nucleic-acid sensing into interferon and T-cell priming programs
Network behavior
Systems Overview
Dendritic cells sample tissue, integrate danger and tolerance cues, migrate to lymphoid niches, and present antigen in a way that shapes T cell fate.
Lineage
Origin
HSC -> myeloid or lymphoid DC progenitors -> cDC1, cDC2, pDC, monocyte-derived DC states
Transcription factors: BATF3, IRF8, IRF4, ZEB2, E2-2
Lifecycle Visualizer
days-weeks
Tissue surveillance
Antigen sampling
hours
Maturation
Costimulatory switch
hours-days
Lymph migration
CCR7-guided trafficking
days
T cell instruction
Priming or tolerance
Activation and Suppression
Surface and Secreted Signals
Metabolic State
Programs
Acute: Danger cues increase costimulation, cytokines, migration, and T cell priming.
Chronic: Persistent antigen can create tolerogenic, exhausted, or inflammatory DC programs.
Tissue Roles
gut: Balances oral tolerance, microbial sampling, IgA support, and TH17/Treg differentiation.
lung: Samples inhaled antigen and directs allergy, viral defense, or tolerance.
skin: Langerhans and dermal DCs coordinate barrier antigen responses.
lymphoid: Presents antigen and costimulation to naive T cells.
Disease Associations
Clinical Pearls
- Dendritic cells determine whether antigen becomes memory, tolerance, allergy, or autoimmunity.
- Costimulation and cytokine context are as important as antigen identity.
- Vaccines work by engineering dendritic cell context.