Figure 5. Effects of MSCM-Fe3O4@PDA, Fe3O4@PDA and Fe3O4 NPs on autophagy. (A) Ultrastructure of autophagy in neurons under electron microscope (autophagy shown by arrow). (B) Detection of p62, LC3, and Beclin 1 mRNA levels by RT-qPCR. (C) The representative pictures and statistical chart of LC3, p62 and Beclin 1 protein by immunohistochemistry. (D) Detection of LC3-I, LC3-II, p62 and Beclin 1 protein by western blot. ap < 0.05 when compared with control, bp < 0.05 when compared with MSCM-Fe3O4@PDA, cp < 0.05 when compared with Fe3O4@PDA.