GSTP1 and psoriasis: The list of differentially expressed proteins also includes immune-related molecules, such as in TPM4 [FC = 2.2; p = 0.009], Serglycin (SRGN) [FC = 0.08; p = 0.03] or antioxidant proteins, such as GSTP1 [FC = 5.3; p = 0.03] in psoriasis.