Fig. 7. Ultrastructure of mesangial cells and podocytes exposed to MNP-SO-BSA. (A) Active surface of mesangial cell with MNP-SO-BSA in the extracellular space (long arrow) and protrusions of plasma membrane (short arrow) surrounding nanoparticles. (B) Phagolysosomes (arrows) in the cytosol of mesangial cell with incorporated MNP-SO-BSA. (C) Phagolysosomes (arrows) and swollen cisterns of Golgi complex (asterisk) in the cytosol of podocytes. (D) Large autophagic vacuole (asterisk) in podocytes containing MNP-SO-BSA (long arrow) and myelin-like structures (short arrow).