FIG. 6.

DNA synthesis is induced by Aβ but not by peroxide. After acute or repeated treatment with Aβ or t-BuOOH, cells were incubated with (³H)-thymidine (1 μCi) for ∼24 h at 37°C, before radioactivity incorporation was measured. Data are mean±SD from two independent experiments each performed in triplicate on different batches of cells. Asterisks (*) represent the level of significance for comparison between untreated and treated samples as indicated in Fig. 5 legend.