PD-1/CTLA-4 blockade leads to expansion of CD8+PD-1int TILs and results in tumor remission in experimental liver cancer

Conclusion: In our model, few doses of checkpoint inhibitors during the priming of transferred CD8+ tumor-specific T cells were sufficient to induce tumor remission. PD-1/CTLA-4 blockade neither reinvigorated the effector function of CD8+PD-1high TILs nor changed the functionality of CD8+PD-1int TILs. Therefore, PD-1/CTLA-4 blockade has an ameliorative effect the expansion of recently primed CD8+ T cells while preventing their development into CD8+PD-1high TILs in the TME. This finding could have important implications for future T cell therapies .
Source: Liver Cancer - Category: Cancer & Oncology Source Type: research