*3.5. Cyclin D1 Protein Expression*

Figure 5 shows the relative expressions of cyclin D1, a protein marker for the G0/G1 phase, in different treatments. The relative expression increased markedly after cells were treated with Aβ (25–35) (Aβ group) in comparison to the untreated cells (C group). A decreased level of expression was observed in cells which underwent 24-h Eq or E2 pretreatment (Eq + Aβ group and E2 + Aβ group, respectively), compared to the Aβ group (*p* < 0.05).
