Figure 2

Aqueous gall extract and luteolin inhibit HeLa cell proliferation. HeLa cells and primary cultured human foreskin keratinocytes were treated with different concentrations of G extract (A and C) or luteolin (B) for 24 and 48 hours. Cell proliferation rate was assessed by colorimetric measurements using the MTT assay. The absolute value obtained for each G extract- or luteolin -treated sample is expressed in a second step as percent relative to the corresponding absolute value obtained for the untreated sample and set at 100. Values are means±S.E.M. of three independent experiments. Statistically significant, *P < 0.05, **P < 0.01, ***P < 0.001 (versus the corresponding untreated group).