Fluorescence tracking demonstrates T cell recirculation is transiently impaired by radiation therapy to the tumor.
Sci Rep
; 14(1): 11909, 2024 05 24.
Article
in En
| MEDLINE
| ID: mdl-38789721
ABSTRACT
T cells recirculate through tissues and lymphatic organs to scan for their cognate antigen. Radiation therapy provides site-specific cytotoxicity to kill cancer cells but also has the potential to eliminate the tumor-specific T cells in field. To dynamically study the effect of radiation on CD8 T cell recirculation, we used the Kaede mouse model to photoconvert tumor-infiltrating cells and monitor their movement out of the field of radiation. We demonstrate that radiation results in loss of CD8 T cell recirculation from the tumor to the lymph node and to distant sites. Using scRNASeq, we see decreased proliferating CD8 T cells in the tumor following radiation therapy resulting in a proportional enrichment in exhausted phenotypes. By contrast, 5 days following radiation increased recirculation of T cells from the tumor to the tumor draining lymph node corresponds with increased immunosurveillance of the treated tumor. These data demonstrate that tumor radiation therapy transiently impairs systemic T cell recirculation from the treatment site to the draining lymph node and distant untreated tumors. This may inform timing therapies to improve systemic T cell-mediated tumor immunity.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
CD8-Positive T-Lymphocytes
Limits:
Animals
Language:
En
Journal:
Sci Rep
/
Sci. rep. (Nat. Publ. Group)
/
Scientific reports (Nature Publishing Group)
Year:
2024
Document type:
Article
Affiliation country:
United States
Country of publication:
United kingdom