Among the main HDL-associated proteins and lipids, the authors were able to demonstrate a reduction in the levels of apoA-I, total cholesterol, cholesteryl esters, free cholesterol, phosphatidylcholine and sphingomyelin, and an increase in the levels of apoA-II and acute-phase proteins, such as SAA and α-1-antitrypsin, in HDL that is derived from psoriasis patients in comparison to the controls [30]. Here, APOA1 is linked to psoriasis.