Research Article

UVB-Induced Secretion of IL-1β Promotes Melanogenesis by Upregulating TYR/TRP-1 Expression In Vitro

Figure 4

Effect of IL-1β on tyrosinase activity and expression levels of MITF, TYR, TRP-1, and TRP-2 mRNA and protein in B16 cells after treatment with 4 pg/μl IL-1β for 48 hours. (a) Tyrosinase activity. (b) Expression levels of MITF, TYR, TRP-1, and TRP-2 mRNA. (c) Expression levels of MITF, TYR, TRP-1, and TRP-2 protein. for all groups. and .
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