Elevated serum interleukin-27 levels in patients with systemic sclerosis: Association with T cell, B cell and fibroblast activation

Ayumi Yoshizaki, Koichi Yanaba, Yohei Iwata, Kazuhiro Komura, Asako Ogawa, Eiji Muroi, Fumihide Ogawa, Motoi Takenaka, Kazuhiro Shimizu, Minoru Hasegawa, Manabu Fujimoto, Shinichi Sato

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

Objective: To determine serum levels of interleukin 27 (IL-27) in patients with systemic sclerosis (SSc) and relate the results to the clinical features of SSc. Methods: Serum levels of IL-27 in 91 patients with SSc and the production of IL-27 by isolated monocytes were examined by ELISA. The expression of IL-27 receptor in the skin fibroblasts, B cells and T cells was quantified by real-time PCR. The effect of IL-27 on immunoglobulin G (IgG) production of B cells, IL-17 production of CD4 T cells and proliferation and collagen synthesis of fibroblasts was also analysed. Results: Serum IL-27 levels were raised in patients with SSc compared with healthy controls and correlated positively with the extent of skin and pulmonary fibrosis and immunological abnormalities. IL-27 levels also correlated positively with serum levels of hyaluronan, recently identified as an endogenous ligand for Toll-like receptors. The retrospective longitudinal analysis showed a tendency for serum IL-27 levels to be attenuated during the follow-up period. IL-27 production by cultured monocytes was increased by hyaluronan stimulation. IL-27 receptor expression was upregulated in the affected skin fibroblasts, B cells and CD4 T cells of patients with SSc. Moreover, IL-27 stimulation increased IgG production of B cells, IL-17 production of CD4 T cells and proliferation and collagen synthesis of fibroblasts in patients with SSc compared with those in healthy controls. Conclusion: These results suggest that IL-27 and its signalling in B cells, T cells and fibroblasts contributes to disease development in patients with SSc.

Original languageEnglish
Pages (from-to)194-200
Number of pages7
JournalAnnals of the Rheumatic Diseases
Volume70
Issue number1
DOIs
Publication statusPublished - 01-2011

All Science Journal Classification (ASJC) codes

  • Immunology and Allergy
  • Rheumatology
  • Immunology
  • Biochemistry, Genetics and Molecular Biology(all)

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