Fig. 2

Cell endocytosis and DHA accumulation in H22 cells. A–B DiR-stained MNV@DHA (10 μg/mL of DHA) was incubated with H22 cells for indicated time and examined by fluorescence microscope (A) and flow cytometry (B). C Different concentrations of DHA or MNV@DHA were incubated with normal or acid-adapted H22 cells for 24 h at different pH conditions and then stained with Oil Red O