OXT and neoplasm: Similarly, there was an increased infiltration of transferred cells (Supplemental Figure 7A), accompanied by a lower frequency of exhausted PD-1+TOX+CD8+ T cells (Supplemental Figure 7B) in transferred TILs from LLC1-Ova tumor–bearing mice receiving α4-1BB plus adoptive transfer of OT-1 A2BR–/– T cells compared with WT T cells.