(a) Confocal microscopy analysis of phalloidin staining in stable transfectant murine podocytes without [Tet(-)] and after induction of c-mip by tetracycline [Tet(+)]. c-mip–overexpressing podocytes display a loss of stress fibers, whereas the actin network is well preserved in non-induced stable transfectant cells. Scale bars, 20 μM. (b) Western-blotting of protein lysates from non-induced [Tet(-)] and induced [Tet(+)] c-mip stable transfectants. Overexpression of c-mip induces a downregulation of synaptopodin. (c) Downregulation of synaptopodin in membranous nephropathy (MN) and transgenic mice (Tg). Confocal microscopy analysis of synaptopodin on control human kidney (Con), kidney biopsy specimens from patients with MN, wild type (wt) and c-mip Tg mice. Scale bars, 20 μM.