Fig. 1

Effects of VA on breast cancer cell growth. MTT growth assays, in MCF-7 and MDA-MB-231 cells treated with increasing doses (0.5, 1, 1.5, 2, 2.5, 3 and 3.5 mM) and in MCF-10 A normal cells treated with 2 mM of VA for 48 and 72 h. Cell proliferation is expressed as fold change ± S.D. relative to control (C) cells and is representative of three different experiments each performed in triplicate. * p < 0.05 and **p < 0.005