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Selected Publication:

Type of publication: Journal Article
Type of document: Full Paper

Year: 2009

Authors:

Title: Epidermal loss of JunB leads to a SLE phenotype due to hyper IL-6 signaling.

Source: Proc Natl Acad Sci U S A. 2009; 106(48):20423-20428



Authors Vetmeduni Vienna:

Kenner Lukas
Moriggl Richard


Abstract:
Systemic lupus erythematosus (SLE) is a complex autoimmune disease affecting various tissues. Involvement of B and T cells as well as increased cytokine levels have been associated with disease manifestation. Recently, we demonstrated that mice with epidermal loss of JunB (JunB(Delta ep)) develop a myeloproliferative syndrome (MPS) due to high levels of G-CSF which are secreted by JunB-deficient keratinocytes. In addition, we show that JunB(Delta ep) mice develop a SLE phenotype linked to increased epidermal interleukin 6 (IL-6) secretion. Intercrosses with IL-6-deficient mice could rescue the SLE phenotype. Furthermore, we show that JunB binds to the IL-6 promoter and transcriptionally suppresses IL-6. Facial skin biopsies of human SLE patients similarly revealed low JunB protein expression and high IL-6, activated Stat3, Socs-1, and Socs-3 levels within lupus lesions. Thus, keratinocyte-induced IL-6 secretion can cause SLE and systemic autoimmunity. Our results support trials to use alpha-IL-6 receptor antibody therapy for treatment of SLE.


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