Fig. 6

Effect of Melissa officinalis extracts on cell proliferation of MCF7, LNCAP, and PC3 cell lines, presented as a percentage of cell viability, versus concentration of the extracts. Dichloromethane (a) ethanol (b) and n-hexane (c) extracts with increasing concentrations in the range 12.5 to 400 μg/mL for each extract. Data represent means ± SEM of experiments performed in duplicate. Untreated cells were used as negative control and mitomycin C was used as positive control