[The Role of Tumor‒Draining Lymph Nodes in Photoimmunotherapy Targeting Cancer‒Associated Fibroblasts]

To effectively induce anti‒tumor immune responses, it is essential that tumor‒specific T cells are generated within the tumor microenvironment (TME), a process in which tumor‒draining lymph nodes (TDLNs) are thought to play a critical role. We have previously demonstrated that photoimmunotherapy targeting cancer‒associated fibroblasts (PIT‒CAF), which specifically targets the fibroblast activation protein (FAP), modulates the immune cell composition and function within the TME. In this study, we investigated the effects of CAFs and PIT‒CAF on tumor‒specific T cells in both the TME and TDLNs.