In our study, we did not observe the differences between serum concentrations of ApoA1 or ApoB between patients with different severities of psoriasis, but interestingly, we found that patients with more severe disease (before acitretin treatment) had higher concentrations of ApoA2 than the group of patients with mild disease before NB-UVB treatment. The gene discussed is APOA2; the disease is psoriasis.