MPPE1 and neoplasm: Interestingly, although tumor antigen-specific CD8+ T cells and Th1 cells were elevated in the TdLNs of Stat3∆/∆ CD103+ cDC1-vaccinated mice, we did not detect differences in co-stimulatory marker expression between Stat3∆/∆ and Stat3fl/fl CD103+ cDC1s in the TdLN.