Fig. 2.
Modulation of doxorubicin resistance by (A) Michelia alba (dichloromethane extract) and (B) Mesua ferrea (n-hexane extract) measured by the resazurin assay. Resistance of CEM/ADR5000 cells to doxorubicin (dark blue lines) was partially reversed by the addition of the extracts (light blue lines). Sensitivity of parental CCRF-CEM cells to doxorubicin (black lines) was similar or slightly diminished by the addition of the extracts (gray lines) second error bar on gray line at B is out of scale. Mean values and standard deviations of two independent experiments with 6 determinations each are shown. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)