Figure 8: The effects of eckol and dieckol on the expression of inflammatory cytokines in human epidermal keratinocytes exposed to PM10. The cells were exposed to PM10 (100 μg mL−1) for 48 h in the absence and presence of eckol or dieckol (10 μg mL−1). The protein levels of TNF-α, IL-1β, IL-6, and IL-8 in the culture medium were analyzed by ELISA and normalized to the total protein content of the cells. Data are presented as fold changes compared to the control value (mean ± SE, ). < 0.05 versus PM10 control.