Fig. 4
Effect of Fe3O4-siPD-L1@M-BV2 on the maturation of DC cell in vitro. A Schematic diagram of co-culture of GL261/TR cells and iDC cells. B The maturation of DC cells in vitro analyzed by flow cytometer. C Statistic analysis of the matured DC cell (n = 3, mean ± SD, *P < 0.05, **P < 0.01, ns: no significant difference)