Figure 8.
CPT-induced DNA damage as determined by the comet assay in fibroblast and SH-SY5Ycells. The cells were exposed to CPT (10 μM) for 2 h, then CPT was washed away, cells continued to grow in media without CPT for 24 h, 48 h and 72 h. The cells were processed for neutral or alkaline comet assays. Images were taken with 10× magnification. A: After CPT treatment, both neutral and alkaline comet assay detected comet tails in fibroblast cells. Comet tails were shorted or disappeared at 24 h. B: After CPT treatment, only alkaline comet assay detected comet tails in SH-SY5Y cells. Comet tails were shorted or disappeared within 72 h. See Figs. 5 and 6 for abbreviations.
