Effects of enzyme-treated caviar (CV) on mRNA expression of HAS1 (A), HAS2 (B), and HAS3 (C), protein expression of CerS4 (D), and mRNA expression of SLC35D1 (E) and DEGS1 (F) in the dorsal skin of UVB-irradiated hairless mice. Normal control (NC, −UVB), control (C, +UVB), L-ascorbic acid (positive control, PC; +UVB with dietary supplementation of L-ascorbic acid at 100 mg/kg/body weight [bw]), CV20 (+UVB with dietary supplementation of CV at 20 mg/kg/bw), CV50 (+UVB with dietary supplementation of CV at 50 mg/kg/bw), and CV100 (+UVB with dietary supplementation of CV at 100 mg/kg/bw). Values are presented as mean ± SD. Different letters (a > b > c > d > e) indicate a significant difference at p < 0.05 by Duncan’s multiple range test.