Figure 4. Aβ 1–42 and APP expression levels and β-secretase enzyme activity in H₂O₂-treated HLECs. A: Western blot analysis of β-amyloid (Aβ) 1–42 in cultured human lens epithelial cells (HLECs). B: Western blot analysis of amyloid-β precursor protein (APP) in cultured HLECs. C: β-secretase activity analysis in cultured HLECs. The concentration of H₂O₂ was 200 μM. The data are the means ± standard deviation (SD). Three independent tests were performed in each group for each experiment. *p<0.05, **p<0.01 with the independent samples t test.