(A) Control and HD brain showing striatal sub-regions with summary of staining.
(B) Quantification of IHC-positive cells for α-Gln, α-RAN, and IBA1 staining ± SEM in caudate nucleus.
(C–I) IHC of striatal sub-sections from HD brains using (C) α-Gln antibody (1C2), ([D]–[G]) α-RAN antibodies, (H) α-IBA1 for microglia, and (I) α-active caspase-3 for cell death. (A)–(I): red, positive staining; blue, nuclear counterstain.
(J) Double staining for RAN protein cocktail using mixture of all four anti-RAN antibodies (brown) plus anti-IBA1 antibody to label microglia with quantitation (± SEM) of single-, double-labeled, and IBA1 cells that are in close proximity to RAN-positive cells.
(K) Double staining for RAN protein cocktail using mixture of all anti-RAN antibodies (brown) plus anti-caspase-3 antibody to label apoptotic cells with quantitation of the percent active Caspase-3-positive cells that are also positive for RAN proteins. See also Figure S2. Cau-WMB, caudate white matter bundles; Int-Cap, internal capsule; Put-WMB, putamen white matter bundles.