A, Schematic depicting adoptive transfer experiment. The mouse image was created using BioRender.com.
B,C, Representative plots (B) and quantification (C) of flow cytometric measurement of the change in ratio of CD45.1/2 DP to CD45.1 SP among Vex+ CD8+ T cells in B16-OVAWT tumors compared to input. Tumors were harvested for analysis on day 15 to 18 after implantation. Ratio fold-change calculated as (DP:SP)TIL / (DP:SP)input. n=5-8 animals per group. Statistical significance determined by one-way ANOVA.
D,E, Percentages of Vex+ CD8+ T cells expressing GzmB (D) and Ki-67 (E) as measured by flow cytometry after tumor harvest. n=5 mice per group. Statistical significance determined by paired t tests.
SP, CD45.1 single-positive. DP, CD45.1/2 double-positive. *p<0.05 **p<0.01 ***p<0.001 ****p<0.0001. ns, not significant. Graphs display mean +/− SD. Data representative of ≥2 independent experiments. TIL, tumor-infiltrating lymphocyte.