Figure S2.

Molecular characterization of CIK cells co-cultured with the PD-1 antibody. The phenotypes of the CIK (cultured with or without the PD-1 mAb) used to target H1975 for 6 days. The proportions of CD3⁺ and CD4⁺ cells (A). The proportions of CD56⁺ cells gated from the CD3⁺ population, and the expression of NKG2D (B). CIK, cytokine-induced killer; PD-1, programmed cell death protein-1; NKG2D, natural killer group 2D.