Cytotoxic Constituents of the Bark of Hypericum roeperianum towards Multidrug-Resistant Cancer Cells

Figure 4

Caspases activities in CCRF-CEM cells treated with the crude extract (HRB) and trichadonic acid for 6 h IC₅₀ of HRB: 13.71 µg/mL and trichadonic acid: 14.44 µM; (A) caspase activity is expressed as percentage (%) compared to untreated cells. Mean ± SD of three independent experiments is shown.