Figure 1: Effects of MeOH and EtOAc extracts of H. formicarum Jack. on cell viability induced by H₂O₂. A. Effects of MeOH and EtOAc extracts of H. formicarum Jack. (0.1, 1, 5, 10, and 100 μg/mL) on SH-SY5Y cell viability for 24 h exposure; B. Effects of pretreatment of SH-SY5Y cells with MeOH and EtOAc extracts of H. formicarum Jack. on cell viability induced by H₂O₂. C. Light microscope observation in SH-SY5Y cell treated with MeOH and EtOAc extracts of H. formicarum Jack. in the presence or absence of H₂O₂ at 20 x magnification. The data are shown as mean±S.E.M. of three independent experiments. Statistical analysis was performed using ANOVA and Tukey–Kramer Post Hoc test, ** P<0.01 vs. control, ^## P<0.01 vs. 400 μM H₂O₂-treated group).