Figure 2. Levels of inflammatory factors in brain tissues (A) and serum (B) after exposure to MSCM-Fe3O4@PDA, Fe3O4@PDA and Fe3O4 NPs. ap < 0.05 when compared with control, bp < 0.05 when compared with MSCM-Fe3O4@PDA, cp < 0.05 when compared with Fe3O4@PDA.