Rosiglitazone Induces Interleukin-1 Receptor Antagonist in Interleukin-1-beta-stimulated Rat Synovial Fibroblasts via a Peroxisome Proliferator-activated Receptor Beta/Delta-dependent Mechanism

Moulin, M. F., Bianchi, D., Boyault, A., Morin, S., Koufany, S., Francois, M., Netter, P., Jouzeau, J. Y. and Terlain, B. (2005) Rosiglitazone Induces Interleukin-1 Receptor Antagonist in Interleukin-1-beta-stimulated Rat Synovial Fibroblasts via a Peroxisome Proliferator-activated Receptor Beta/Delta-dependent Mechanism. Arthritis and Rheumatism, 52 3: 759-769. doi:10.1002/art.20868


Author Moulin, M. F.
Bianchi, D.
Boyault, A.
Morin, S.
Koufany, S.
Francois, M.
Netter, P.
Jouzeau, J. Y.
Terlain, B.
Title Rosiglitazone Induces Interleukin-1 Receptor Antagonist in Interleukin-1-beta-stimulated Rat Synovial Fibroblasts via a Peroxisome Proliferator-activated Receptor Beta/Delta-dependent Mechanism
Journal name Arthritis and Rheumatism   Check publisher's open access policy
ISSN 0004-3591
Publication date 2005
Sub-type Article (original research)
DOI 10.1002/art.20868
Volume 52
Issue 3
Start page 759
End page 769
Total pages 11
Place of publication Hoboken. N.J.
Publisher John Wiley & Sons
Language eng
Subject 060405 Gene Expression (incl. Microarray and other genome-wide approaches)
Abstract OBJECTIVE: To study the potency of 2 peroxisome proliferator-activated receptor gamma (PPARgamma) agonists, 15-deoxy-Delta(12,14)-prostaglandin J(2) (15-deoxy-PGJ(2)) and rosiglitazone, to modulate the expression of interleukin-1 receptor antagonist (IL-1Ra) in rat synovial fibroblasts. METHODS: Levels of messenger RNA for IL-1Ra and PPAR isotypes (alpha, beta/delta, gamma) were assessed by real-time polymerase chain reaction in rat synovial fibroblasts exposed to 10 ng/ml of IL-1beta. PPAR levels were assessed by Western blotting and secreted IL-1Ra levels by immunoassay. The potency of PPARgamma agonists and the PPARbeta/delta agonist GW-501516 on IL-1Ra levels was tested in the range of 1-10 microM and at 100 pM, respectively. The contribution of PPARgamma to the effects of rosiglitazone on IL-1Ra secretion was examined either by its overexpression or by inhibition using wild-type or dominant-negative constructs and the antagonist GW-9662 (10 microM), respectively. The dominant-negative strategy was also performed to investigate the possible contribution of PPARbeta/delta and NF-kappaB activation. RESULTS: IL-1beta-induced IL-1Ra production was increased by 10 microM rosiglitazone but was reduced dose-dependently by 15-deoxy-PGJ(2). Both agonists lowered IL-1beta secretion, but rosiglitazone alone reduced the imbalance of IL-1beta/IL-1Ra toward basal levels. Enhancement of IL-1beta-induced IL-1Ra production by rosiglitazone was not affected by PPARgamma overexpression or by its inhibition with dominant-negative PPARgamma or GW-9662. Inhibition of NF-kappaB was also ineffective against rosiglitazone but abolished the stimulating effect of IL-1beta on IL-1Ra. All PPAR isotypes were expressed constitutively in rat synoviocytes, but PPARgamma decreased dramatically upon IL-1beta exposure, whereas PPARbeta/delta remained stable. Dominant-negative PPARbeta/delta abolished the enhancement of IL-1Ra by rosiglitazone, whereas GW-501516 reproduced the effect of rosiglitazone on IL-1Ra secretion. CONCLUSION: Rosiglitazone stimulates IL-1Ra production by a PPARbeta/delta mechanism in activated rat synovial fibroblasts, further contributing to its potential antiarthritic properties and opening new perspectives for the modulation of inflammatory genes by specific PPAR agonists in articular cells.
Keyword Rheumatism
Arthritis
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Institute for Molecular Bioscience - Publications
 
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Created: Wed, 11 Feb 2009, 13:16:35 EST by Ms Karen Naughton on behalf of Institute for Molecular Bioscience