Fig. 1. (A) mRNA expression levels of aryl hydrocarbon receptor (AhR) in peripheral blood mononuclear cells (PBMC) from patients with atopic dermatitis (AD), psoriasis (PS), and healthy controls (HC) were examined by quantitative PCR (qPCR). (B) mRNA expression levels of AhR in PBMC from patients with AD, PS, and HC treated with 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) were examined by qPCR. (C) mRNA expression levels of cytochrome P450 family 1 member A1 (CYP1A1), interleukin (IL)-17, and IL-22 in PBMC from patients with AD, PS, and HC treated with TCDD were examined by qPCR. Values are presented as mean±standard error of mean. ^*p<0.05 vs. control, ^**p<0.01 vs. control.