Fig. 2

Viability of U87MG cells after treatment with EEP, HPE and their combination. Legend: Cytotoxicity effect of EEP (30 μg/mL), HPE (in concentrations 1.56–100.0 μg/mL) and their combinations after 24 (a), 48 (b) and 72 (c) hours of incubation. The results are presented as a percentage of control. All statistical analyses were performed using Student-t test (p < 0.02): ^*HPE vs HPE with EEP; ^#EEP vs HPE with EEP; ● HPE 24 h vs HPE 48 h; ○ HPE 48 h vs HPE 72 h; ■ HPE with EEP 24 h vs HPE with EEP 48 h; □ HPE with EEP 48 h vs HPE with EEP 72 h