Fig. 5From: Effects of concentration of amyloid β (Aβ) on viability of cultured retinal pigment epithelial cellsConcentrations of PEDF in the ARPE-19 cell culture medium determined by ELISA. ARPE-19 cells were exposed to Aβ 1–40 for 24 h. The concentration of PEDF is significantly increased only in the 5 μM Aβ 1–40 group. Data are the means ± SEMs for each group (n = 4)Back to article page