Keratin 6A Promotes Skin Inflammation Through JAK1-STAT3 Activation in Keratinocytes

The study explores the role of Keratin 6A (KRT6A) in skin inflammation, particularly in rosacea and psoriasis, revealing that KRT6A is overexpressed in these conditions and exacerbates inflammation by activating the JAK1-STAT3 pathway. This activation occurs through the inhibition of JAK1 ubiquitination, mediated by RNF41, leading to increased proinflammatory cytokine production. Mouse models showed that KRT6A knockdown reduced inflammation, while overexpression worsened it. These findings suggest that targeting KRT6A could be a promising therapeutic strategy for treating inflammatory skin diseases linked to epidermal dysfunction.