C3G inhibits UVB induced skin edema. (A) Chemical structure of C3G with a molecular weight of 484.8 g/mol. (B) C3G inhibits UVB-induced hyperplastic response in terms of epidermis thickness (mm). Female SKH-1 mice (6–8 weeks, n = 8) were UVB irradiated (100 mJ/cm2) three times a week for a total of 10 weeks. The animals were treated topically with either acetone (control group) or C3G (250 and 500 μM in acetone) one day prior to UVB exposure. The mice were euthanized after 10 weeks of UVB irradiation; skin was collected and measured the thickness. Significant difference compared to UVB alone; *p < 0.05. (C) Representative micrographs of H&E staining of skin. (D) MPO was determined as a marker of UVB-induced cutaneous infiltration. The levels of UVB-induced MPO were lower in C3G-treated mouse skin than non-C3G-treated UVB irradiated mouse skin. Data are reported as fold change (n = 8). Significant difference compared to UVB alone; *p < 0.05.