Figure 4. 9-cis RA rescued amyloid-associated synaptic loss. The levels of the postsynaptic marker PSD-95 (A, B) and presynaptic marker synaptophysin (Syp) (C, D) in the cortex (left) and hippocampus (right) were examined by western blotting. Data represent the mean ± SEM (n=4). *, p<0.05.