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Expression of the pro-inflammatory protein S100A12 (EN-RAGE) in rheumatoid and psoriatic arthritis

Lookup NU author(s): Dr David Kane

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Abstract

OBJECTIVES: Infiltration of synovial tissue by neutrophils is crucial in rheumatoid arthritis (RA), psoriatic arthritis (PsA) and seronegative arthritis (SA). Altered vascular function and endothelial activation are important in PsA. S100A12 (EN-RAGE) is secreted by activated granulocytes and binds to the receptor for advanced glycation end products, which induces nuclear factor (NF)-kappaB-dependent activation of endothelium. METHODS: Immunohistochemical studies were performed to detect synovial S100A12 expression. We analysed serum and synovial fluid of 42 patients for S100A12 levels. RESULTS: S100A12 was strongly expressed in inflamed synovial tissue whereas it was nearly undetectable in synovia of controls or patients after successful treatment. Serum levels of S100A12 correlated with disease activity. CONCLUSIONS: Local expression of S100A12 in inflamed tissue suggests a role in synovitis, especially in PsA. High serum concentrations of S100A12 in patients with active arthritis compared with healthy controls or patients in remission point to its usefulness as a serum marker.

Publication metadata

Author(s): Kane D; Foell D; Bresnihan B; Vogl T; Nacken W; Sorg C; Fitzgerald O; Roth J

Publication type: Article

Publication status: Published

Journal: Rheumatology

Year: 2003

Volume: 42

Issue: 11

Pages: 1383-1389

ISSN (print): 1462-0324

ISSN (electronic): 1462-0332

Publisher: Oxford University Press

URL: http://dx.doi.org/10.1093/rheumatology/keg385

DOI: 10.1093/rheumatology/keg385

Notes: Clinical Trial Controlled Clinical Trial Journal Article, PsA, MRP

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