BAG3 associates with aggresomes in vivo. (A) Spinal cord sections of mice overexpressing SODWT and SODG85R (disease end-stage) were immunostained for BAG3 and SOD1. Arrows indicate SOD1- and BAG3-positive aggregates in the neuropil. Scale bar, 20 μm. (B) Localization analysis of BAG3 and SODG85R in surviving spinal cord motor neurons from SODG85R mice at the time of disease symptom onset. Arrows indicate perinuclear aggresomes containing BAG3 and SODG85R. Scale bar, 10 μm. Magnific., magnification; SOD, superoxide dismutase; SODWT, wild-type SOD.