Table 1.

Evaluation of the inhibitory activity of the administered extracts against HepG2 and MCF-7 cancer cell growth expressed in IC₅₀ values as determined based on XTT assay.

Compounds	IC50 Values μg/mL
	HepG2			MCF-7
	24 h	48 h b	72 h b	24 h b	48 h b	72 h b
Liposomes contained NMGE	132 ± 6.7	17 ± 0.7	11 ± 0.9	18 ± 1.4	12 ± 1.1	10 ± 0.2
Liposomes contained AMGE	184 ± 20.2
Liposomes contained total mastic gum	255 ± 17.9
Empty liposomes	- a

^a Empty liposomes sample was not shown IC₅₀ value at the tested concentrations. ^b at these time-points, cells were treated only with liposomes contained NMGE. AMGE: acidic mastic gum extract; NMGE: neutral mastic gum extract.