Abstract
The Janus kinase/signal transducer and activator of transcription (JAK/STAT) signaling pathway has been linked to the pathogenesis of many inflammatory skin diseases; however, the role of JAKs in the pathogenesis of acne vulgaris has not been previously elucidated. We aimed to analyze the cutaneous expression of JAK1/2/3 proteins in acne vulgaris and investigate the possible role of JAK signaling in acne pathogenesis. This case-control study was carried out on 28 patients with inflammatory acne vulgaris vs 20 age- and sex-matched healthy volunteers. Acne severity was assessed using Global acne severity grading system (GAGS). Skin biopsies were collected from lesional and non-lesional skin of patients and from control group. The expression of JAK1/2/3 proteins was examined by real-time quantitative polymerase chain reaction. JAK1 and JAK3 were overexpressed in acne lesions, compared to non-lesional skin and the control group. No significant difference was found in JAK2 expression between patients and controls. JAK1 and JAK3 showed no significant relation with the patients' age, sex, family history, duration of acne, or GAGS score. Our results suggest the activation of JAK pathway in acne lesions, indicating that it may play a pivotal role in the inflammatory disease process. JAK1 and JAK3 may be possible new targets for acne therapy.
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