FOSB and psoriasis: Meanwhile, we analysed the published scRNA‐seq data (GSE 150672) of KCs from psoriasis lesions and healthy tissues and found out a notable elevated expression of JUN (gene name of c‐Jun), an AP1 subunit, along with several increased expression of antimicrobial peptides and chemokine CCL20 in psoriatic KCs (Figure 5H), indicating a positive correlation between JUN expression and the inflammatory mediators in KCs within psoriasis.