Transwell migration assay showed that PDGF-BB-induced ARPE19 cell migration was inhibited by resveratrol.

<p>Transwell inserts were coated with fibronectin (0.3 mg). ARPE19 cells (5×10⁴ in 200 µl) were seeded in the upper chamber in the absence or presence of resveratrol. The inserts were assembled in the lower chamber, which was filled with 600 µl serum-free medium without PDGF-BB (A) and containing PDGF-BB (20 ng/ml) (B), and preincubated with various concentrations of resveratrol for 30 mininutes at 37°C. After incubating for 5 hours at 37°C, fixation was performed. ARPE19 cells that migrated to the underside of filter membrane were photographed (A, B) and counted by phase contrast light microscope under high power field (magnification, 100×), (C). All experiments were conducted in duplicates and similar results were repeated four times. The results are expressed as percentage of control and represent mean ± standard errors (SE) of the eight experiments. *p<0.05 significantly differs from PDGF-BB-stimulated cells (the fourth bar).