Fig. 5

Effect of piperine (a) and PC extract (b) on the sensitization to FITC by means of mouse ear-swelling test (n = 6). BALB/c mice were sensitized with FITC in acetone, or FITC in 1% PCextract, 5% PC extract or 2% DBP. Mice in the untreated group were not sensitized but challenged with 0.5%FITC in 10%DBP in acetone. Mouse ear-swelling was measured at 24, 48 and 72 h after challenge.* p < 0.05 when compared with acetone group;^ap < 0.05 when compared with 2% DBP;^bp < 0.05 when compared with untreated group