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Cutaneous JAK Expression in Vitiligo

Amira A Abdel Motaleb1, Yasmin M Tawfik1, Mohamed A El-Mokhtar2

  • 168797 Faculty of Medicine, Department of Dermatology, Venereology and Andrology, Assiut University, Egypt.

Journal of Cutaneous Medicine and Surgery
|November 11, 2020
PubMed
Abstract

Insights

Janus kinase-1 (JAK1) and Janus kinase-3 (JAK3) are upregulated in vitiligo skin, suggesting they may play a role in the disease. Selective JAK3/1 inhibition could be a potential treatment for vitiligo.

Area of Science:

  • Dermatology
  • Immunology
  • Molecular Biology

Background:

  • The Janus kinase-signal transducer and activator of transcription (JAK-STAT) pathway is a potential therapeutic target for vitiligo.
  • Limited data exists on the cutaneous expression of Janus kinases (JAKs) in vitiligo patients.

Purpose of the Study:

  • To analyze the cutaneous expression patterns of JAK1, JAK2, and JAK3 in vitiligo.
  • To investigate the relationship between JAK expression and clinical parameters of vitiligo.

Main Methods:

  • A case-control study involving 24 active vitiligo patients and 20 healthy controls.
  • Skin biopsies (lesional, perilesional, nonlesional) were analyzed for JAK1, JAK2, and JAK3 expression using RT-PCR.

Main Results:

  • JAK1 and JAK3 were overexpressed in vitiligo skin compared to controls, with a stepwise increase from nonlesional to lesional skin.
  • JAK3 expression was significantly higher than JAK1.
  • JAK2 expression showed no significant difference between patients and controls.

Conclusions:

  • JAK1 and particularly JAK3 are upregulated in vitiliginous skin, potentially contributing to disease pathogenesis.
  • Targeted inhibition of JAK3/1 may offer a therapeutic strategy for vitiligo.
  • Study registered on ClinicalTrials.gov (Identifier: NCT03185312).
Keywords:
JAK inhibitorsJAK3Janus kinasesignal transducer and activator of transcriptionvitiligo

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