Immunostaining of 4 brain regions from BM-transplanted GS mice with α-32 and α-GFP antibodies.

α-32 immunostaining of brain sections derived from BMT-PPCA–transplanted mice at 9 months after treatment revealed numerous PPCA⁺ endothelial cells, perivascular macrophages, sparse neurons as well as the cuboidal epithelium of the choroid plexus and its macrophages (indicated by arrowheads). Similar but more restricted immunostaining was detected in sections of the same regions stained with α-GFP antibody. Size bars correspond to 40 μm.