Figure 1.

In vitro antitumor activity against lung A-549, colorectal H-116, pancreas PSN-1 and breast SKBR3 cancer cell lines of extracts from ascidians treated with antibiotics. Results are expressed in IC₅₀ (μg/mL), the concentration required to inhibit growth by 50%, obtained from crude extracts from control and treated colonies in triplicate samples during four weeks. IC₅₀ (μg/mL) values for control colonies (C) and treated colonies (T) are shown for each cancer cell line.