Figure 5.

The cytotoxic effect of histamine and/or TNF-α on keratinocytes (a), SiHa cells (b) and ME-180 cells (c). The cells were cultivated in incomplete or complete medium and treated with indicated concentrations of histamine and/or TNF-α. The results are expressed as the percentage of the absorbance in the control wells. Each bar represents the mean of four individual cultures ± SE. "*" denotes p < 0.05 when compared with the control values.