Figure 6.
Immunofluorescence double labeling of BACE1 with neuronal and astrocytic markers in 5XFAD and AD brains. Brain sections from 5XFAD or AD brains were costained with BACE-Cat1 and either antibodies against NSE (A), synaptophysin (presynaptic marker) (B), MAP2 (postsynaptic marker) (C), β-III tubulin (neuronal marker) (D), or GFAP (astrocyte marker) (E). A, 5XFAD (top) and AD (bottom) brain sections were double stained with BACE-Cat1 (red) and anti-NSE antibody (green). Note that, within BACE1-positive deposits, BACE1 immunoreactivity colocalizes extensively (5XFAD) and moderately (AD) with NSE staining. B, 5XFAD (top) and AD (bottom) brain sections were double stained with BACE-Cat1 (red) and anti-synaptophysin antibody (green). Within deposits, BACE1 immunoreactivity colocalizes moderately well with synaptophysin staining in both 5XFAD and AD brains. C, 5XFAD brain sections were double stained with BACE-Cat1 (red) and anti-MAP2 antibody (green). BACE1 and MAP2 immunoreactivities do not colocalize to any significant extent. D, 5XFAD (top) and AD (bottom) brain sections were double stained with BACE-Cat1 (green) and anti-β-III tubulin antibody (red). BACE1 colocalization with β-III tubulin is present but relatively low within BACE1-positive deposits in 5XFAD and AD brains. E, 5XFAD (top) and AD (bottom) brain sections were double stained with BACE-Cat1 (red) and anti-GFAP antibody (green). Note that the overlap between BACE1 and GFAP immunoreactivities in 5XFAD and AD deposits is low. Scale bar: A, Top left, 20 μm.