Fig. 2.

Proliferation of RAW 264.7 macrophages. RAW 264.7 cells were stimulated for 24 h or 48 h with 100 µg/mL of Echinacea (EP) and Erigeron (EC). As a negative control, RAW 264.7 cells cultured without stimulants were used. Concanavalin A (Con A (10 μg/mL)) was used as positive control. Results are expressed as a mean stimulation indexes (average relative light units in the presence of antigens/average relative light units obtained without antigen). All data are presented as a mean stimulation indexes ± SD values from two biological and three technical replicates. The statistical significance of differences between untreated cells and stimulated cells using one-way ANOVA and post hoc Bonferroni’s tests is expressed as: **—0.001 < P < 0.01