Rheumatology International

, Volume 32, Issue 3, pp 729–736 | Cite as

Inhibitors of p38 and ERK1/2 MAPkinase and hydrogen sulphide block constitutive and IL-1β-induced IL-6 and IL-8 expression in the human chondrocyte cell line C-28/I2

Original Article

Abstract

Mitogen-activated protein kinases (MAPKs) play a central role in inflammatory processes, and their blockage represents pharmacological approaches in the treatment of autoimmune diseases like rheumatoid arthritis (RA). Alternatively, H2S has long been used in sulphur bath therapy for patients suffering from different types of rheumatic disorders, but reports about the beneficial effects of this form of therapy are controversial, rare and of poor scientific quality. The human chondrocyte cell line C-28/I2 was treated with two different MAPK inhibitors (SB203580 and U0126) or with various concentrations of the H2S donor Natrium hydrogen sulphide (NaHS). Thereafter, the secretion of IL-6 and IL-8 was quantified by enzyme-linked immunosorbent assays (ELISAs). The impact of NaHS on the regulation of p38 and ERK1/2 MAPK was confirmed by Western blot experiments. Furthermore, IL-6 and IL-8 expression was quantified by real-time polymerase chain reaction (RT-PCR) and ELISAs from cells which were exposed to SB203580, U0126 and NaHS and stimulated by IL-1β. The C-28/I2 cells constitutively expressed large quantities of IL-6 and IL-8. The data provided prove that in these cells, constitutive as well as IL-1β-induced IL-6 and IL-8 expression was partially and transiently blocked by the treatment of cells with both MAPK inhibitors and NaHS. Presented data seem to be important in evaluating the beneficial functions of MAPK inhibitors and H2S in immune–pathophysiological processes.

Keywords

Mitogen-activated protein kinases H2Interleukin-6 Interleukin-8 

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  1. 1.Ludwig Boltzmann Institute for Rheumatology and BalneologyViennaAustria
  2. 2.Department of RheumatologyGeneral Hospital of ViennaViennaAustria

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