Figure 3.

Evaluation of curcumin 1 and its glucuronide derivatives 2 and 3 on cell proliferation. Five thousand KBM-5 (A) Jurkat (B) U266 (C) and A549 (D) cells per well were seeded in triplicate onto 96-well plates; treated with the each compound at 1, 5, 10, 25, 50, 100 or 200 μM. After 72 the cell viability was measured by the MTT method and presented as % cell viability. The data were expressed as the means ± SD of triplicate samples. *P < 0.05 and **P < 0.01 vs. untreated cells.