Curcumin Protects Skin against UVB-Induced Cytotoxicity via the Keap1-Nrf2 Pathway: The Use of a Microemulsion Delivery System

Figure 4

Activation of the Keap1-Nrf₂-EpRE pathway following 6 h, 12 h, and 24 h treatments. mRNA expression determined by real-time PCR. GAPDH mRNA expression was used for normalization, and the basal mRNA normalized expression was considered 1. Average values are presented in the figure with standard deviation of the mean (, ).