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Inhibitory effect of OLE on UVA-induced activation of caspase-3 (A), -8 (B) and -9 (C) in human skin fibroblasts. Caspase activities are expressed as % of control, where the caspase activity in untreated and UVA-irradiated cells were taken as 100%. The figure shows mean results from 3 independent experiments. Error bars denote ±SD. * p < 0.05, ** p < 0.01, *** p < 0.001 compared to cells irradiated in the absence of OLE or the reference antioxidants (UVA).
