In Vitro: Nanaomycin A (10-10000 nM; 72 hours) has a distinct cytotoxic effect in all three cell lines. Nanaomycin A (0.5, 5 μM; 72 hours) reveals induction of RASSF1A protein expression in A549 cells. Nanaomycin A (5 μM; 72 hours) has an 18-fold relative induction. Nanaomycin A not affects the enzymatic activity of DNMT1.