Plaques especially in the thalamus and subiculum. Aggregated, hyperphosphorylated tau tangles. Neuronal loss especially of NPY neurons in the hippocampus and subiculum. More severe pathology than Tg-SwDI alone.
Severe learning and memory deficits. Impaired spatial memory compared to Tg-SwDI as measured by the radial arm maze and the Barnes maze at 52-56 weeks.
Yes
C57BL/6J; C57BL/6N
B6.Cg-Nos2tm1Lau Tg(Thy1-APPSwDutIowa)BWevn/Mmjax
Decreased neuropeptide Y staining throughout the hippocampus, particularly in the CA3 region and subiculum.
Aβ accumulates in the cerebral cortex and hippocampus starting ~6 months and increasing with age. Other regions affected later. Deposition occurs in white matter, cerebrovasculature, and grey matter in the form of diffuse and fibrillar plaques. Fibrillar deposits are associated with dystrophic neurites and GFAP-positive astrocytes at ~ 6 months with later microglial activation.
Progressive impairment between 5–7 and 15–17 months in some tests of cognitive performance, but not others. No change in anxiety levels.
Yes
B6/D2/Swe/SJL mixed background
Selective increase in brain Aβ42(43) in the double transgenics (41% increase at 6 weeks) compared to Tg2576 single transgenic, which had unchanged Aβ40 and Aβ42(43) at this age.
