Mice studied were crosses of Tg2576 and TauVLW to give double mutant APP/tau+/+ (hereafter termed APPsw-tauvlw), mutant APP+/− (APPsw), mutant tau−/+ (tauvlw), and non-transgenic−/− animals.
Mouse coronal brain sections were probed with primary antibody (4G8 and 6E10 mouse anti-Ab 1:500, Chemicon, Temecula, CA; AT8 mouse anti-human PHF tau 1:50, Innogenetics, Belgium) and the appropriate secondary antibody (anti-mouse IgG1 1:200, Southern Biotechnology, Birmingham, AL; Vector ABC Kit). Sections were processed by Nissl staining for neuronal counts, Thioflavin-T and modified Bielschowsky.