Fig. 3.

Cytotoxicity of the herbal extracts on AML12 and HepG2 2.2.15 cells. AML12 (a) and HepG2 2.2.15 (b) cells were treated for 72 h with same dosage (50 μg/ml) of ethanolic extracts of Dioscorea bulbifera, Lasiosphaera fenzlii, Paeonia suffruticosa and Polygonum cuspidatum (labeled as DBE, LFE, PSE, and PCE). EtOH and ADV were used as negative and positive controls, respectively. After treatments, cell viability was measured by MTT assay and presented as % of untreated control. The data represent the mean ± SD (n > 3). ***p < 0.001. EtOH 0.25% ethanol; ADV 10 μg/ml adefovir; H ₂ O ₂ 0.35%