Fig. 2

Uptake of Fe₃O₄-FAM@M_-BV2 by GL261/TR cell. A Schematic diagram of co-culture of GL261/TR cells, HT-22 cells, BV2 cells and RAW264.7 cells in a petri dish. B The uptake of Fe₃O₄-FAM@M_-BV2 by co-cultured GL261/TR cells, HT-22 cells, BV2 cells and RAW264.7 cells. C–F The typical flow cytometer diagrams of Fe₃O₄-FAM@M_-BV2 uptake by co-cultured GL261/TR cells, HT-22 cells, BV2 cells and RAW264.7 cells. G Uptake of Fe₃O₄-FAM@M_-BV2 by GL261/TR cells in the presence of different uptake inhibitors observed by LSCM. H The silence effect of Fe₃O₄-siNC, siPD-L1@Lipo2000, Fe₃O₄-siPD-L1 and Fe₃O₄-siPD-L1@M_-BV2 on PD-L1 protein in GL261/TR cells (n = 3, mean ± SD, ^*P < 0.05, ^**P < 0.01)