Figure 2.
PBMNCs after 24, 48, and 72 h incubation with different concentrations of umbelliprenin. At 10, 20, and 50 μM, umbelliprenin showed no cytotoxicity or a mild proliferation effects on PBMNCs, but at higher doses it showed cytotoxic/anti-proliferative effects. 0.5% DMSO was used as the solvent control and Con A 2.5 μg/ml as a positive control for proliferation.