Dendritic cells maintain anti-tumor immunity by positioning CD8 skin-resident memory T cells
Abstract
Tissue-resident memory (TRM) T cells are emerging as critical components of the immune response to cancer; yet, requirements for their ongoing function and maintenance remain unclear. APCs promote TRM cell differentiation and re-activation but have not been implicated in sustaining TRM cell responses. Here, we identified a novel role for dendritic cells in supporting TRM to melanoma. We showed that CD8 TRM cells remain in close proximity to dendritic cells in the skin. Depletion of CD11c+ cells results in rapid disaggregation and eventual loss of melanoma-specific TRM cells. In addition, we determined that TRM migration and/or persistence requires chemotaxis and adhesion mediated by the CXCR6/CXCL16 axis. The interaction between CXCR6-expressing TRM cells and CXCL16-expressing APCs was found to be critical for sustaining TRM cell–mediated tumor protection. These findings substantially expand our knowledge of APC functions in TRM T-cell homeostasis and longevity.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 06, 2021
- Source ID
- 10.26508/lsa.202101056
Entities
People
- Aleksey Molodtsov
- Bruce R Branchini
- Christina Angeles
- Jennifer L Vella
- Mary Jo Turk
- Yina H Huang
Organizations
- Air Force Office of Scientific Research
- Connecticut College
- Dartmouth–Hitchcock Medical Center
- Geisel School of Medicine
- National Institutes of Health
- Norris Cotton Cancer Center
- University of Michigan