IC50: 0.28 μM (β cell proliferation)
WS3 induces pancreatic R7T1 β cell proliferation in dose response, with an EC 50 value of 0.28 μM.WS3 (1.0 nM-1.0 µM) reversibly proliferate primary retinal pigment epithelial (RPE) cells isolated from fetal and adult human donors. Following withdrawal of WS3, RPE cells differentiate into a functional monolayer, as exhibited by their expression of mature RPE genes and phagocytosis of photoreceptor outer segments.