Fluorescent tracking identifies key migratory dendritic cells in the lymph node after radiotherapy.
Publication Title
Life Sci Alliance
Document Type
Article
Publication Date
9-1-2022
Keywords
oregon; portland; chiles; Animals; Dendritic Cells; Lymph Nodes; Mice; T-Lymphocytes
Abstract
Radiation therapy generates extensive cancer cell death capable of promoting tumor-specific immunity. Within the tumor, conventional dendritic cells (cDCs) are known to carry tumor-associated antigens to the draining lymph node (TdLN) where they initiate T-cell priming. How radiation influences cDC migration is poorly understood. Here, we show that immunological efficacy of radiation therapy is dependent on cDC migration in radioimmunogenic tumors. Using photoconvertible mice, we demonstrate that radiation impairs cDC migration to the TdLN in poorly radioimmunogenic tumors. Comparative transcriptional analysis revealed that cDCs in radioimmunogenic tumors express genes associated with activation of endogenous adjuvant signaling pathways when compared with poorly radioimmunogenic tumors. Moreover, an exogenous adjuvant combined with radiation increased the number of migrating cDCs in these poorly radioimmunogenic tumors. Taken together, our data demonstrate that cDC migration play a critical role in the response to radiation therapy.
Clinical Institute
Cancer
Specialty/Research Institute
Earle A. Chiles Research Institute
Specialty/Research Institute
Oncology
