PLA2G2D and psoriasis: Previous studies have also shown that PLA2G2D was preferentially expressed in lymphoid tissue-resident dendritic cells and macrophages and implicated in anti-inflammation response in an array of inflammation-related conditions including contact hypersensitivity (43), viral infection-associated inflammation (46), experimental encephalomyelitis and colitis (47), and contact dermatitis and psoriasis (48).