Fig. 7. PIO promotes iNKT cell-mediated anti-tumor immunity.
a Timeline of experimental procedure. b–d Tumor pictures on day 20 (b), tumor size (c), and survival rate (d) of B16F10 tumor-bearing mice receiving indicated treatments (PBS, n = 9; PIO, n = 9; αGC, n = 10; αGC + PIO, n = 8). Bar, 1 cm. e, f Percentages of NK and CD8+ T cells (e; PBS, n = 6; PIO, n = 6; αGC, n = 16; αGC + PIO, n = 12), and percentages of IFN-γ+ NK and IFN-γ+ CD8+ T cells (f; PBS, n = 6; PIO, n = 6; αGC, n = 16; αGC + PIO, n = 10) in tumors from PIO-treated and PIO-untreated mice after injecting with or without 2 μg αGC for 5 h. g Size of tumors from Jα18−/− mice receiving indicated treatments (PBS, n = 8; αGC + PIO, n = 7). h, i Percentages of NK and CD8+ T cells (h), and percentages of IFN-γ+ NK and IFN-γ+ CD8+ T cells (i) in tumors from Jα18−/− mice receiving indicated treatments as described in f (n = 5 mice per group). j Size of tumors from Ifng−/− mice receiving indicated treatments (PBS, n = 11; αGC + PIO, n = 9). k Percentages of NK and CD8+ T cells in tumors from Ifng−/− mice receiving indicated treatments (PBS, n = 10; αGC + PIO, n = 8). l Generation of mixed bone marrow chimeras. m PPARγ expression in iNKT cells from PPARγΔ mice or WT mice. n Percentages of intratumoral iNKT cells and percentages of IFN-γ+ iNKT cells in tumors from PPARγΔ or WT mice receiving PIO daily and 2 μg αGC for 5 h (n = 8 mice per group). p, q Tumor size (p) and survival rate (q) of tumor-bearing PPARγΔ (n = 8) or WT (n = 10) mice receiving indicated treatments. Error bars represent SEM. Data were analyzed by two-way ANOVA (c, g, j, p), Mann–Whitney test (e, f, h, i, k, n, o), or log-rank test (d, q). *P < 0.05, **P < 0.01, ***P < 0.001. Source data are provided as a Source Data file.