Expansion of CD103+ cells enhances the activation of T cells in the tumor tissue of RCC xenograft mice. RCC tumor tissue was lysed and the supernatant was used to measure the level of (A) IFN-γ, (B) granzyme B and (C) PD-L1. RCC, renal cell carcinoma; IFN, interferon; -a, antibody; PD-L1, programmed cell death ligand 1; CTLA4, cytotoxic T-lymphocyte-associated protein 4; FLT3L, Fms-related tyrosine kinase 3 ligand; CD, cluster of differentiation. *P<0.05, **P<0.01.