Figure 1. RPE cell morphology is disrupted by chronic TBHP treatment. (A) Schematic of experimental design used for hRPE and ARPE-19 cells (p, passage; h, hours). hRPE from donors 4 (B-D) and 5 (H,I) as well as ARPE-19 (E-G) cells were collected, plated (B,E), and cultured for 60 days (C,F,H) prior to beginning an experimental course. TBHP treatment begins on day 1. ZO-1 (H,I), tight junction-associated marker (red). White arrows indicate regions suggestive of disrupted tight junctions. Scale bar, 100μm.