Figure 4.

Overexpression of human tau does not cause tangle formation or increase tau hyperphosphorylation. PHF1 positive tau accumulates in neuropil threads in APP/PS1/rTg21221 mice (A) and in dystrophic neurites in both APP/PS1/rTg21221 (B) and APP/PS1 mice (C). A western blot of crude homogenate from the cortex of a mouse (5 μg protein) was probed for PHF1 (D) and GAPDH (E) as a loading control. The PHF1 bands between 55–65 kDa were quantified and the overexpression of human tau did not change the overall levels of PHF1 (F). APP/PS1/rTg21221 n = 6, APP/PS1n = 3, rTg21221 n = 4 Scale bar 5 μm. [Colour figure can be viewed at wileyonlinelibrary.com].