Fig. 4.

Cell proliferative effects of extracts of the medicinal herbs comprising yokukansan on B65 neuroblastoma cells. WST-8 cell proliferation assay of B65 neuroblastoma cells cultured with various concentrations of UR, BR, AR, CR, ALR, GR and PC after treatment for 24, 48 and 72 h. The vertical axis shows the proliferation rate relative to that in the control without the test compounds. The histogram shows means ± S.D (n = 3). When the absolute absorbance value was statistically different from control without each medicinal herbs comprising yokukansan, it was considered to be statistically significant (*; p < 0.05 vs. control absolute absorbance value).