Open Access

ARTICLE

Interleukin-32, CCL2, PF4F1 and GFD10 are the only cytokine/chemokine genes differentially expressed by in vitro cultured rheumatoid and osteoarthritis fibroblast-like synoviocytes

Nicolas Cagnard^1,2, Franck Letourneur², Abdellatif Essabbani¹, Valérie Devauchelle³, Sylvie Mistou¹, Audrey Rapinat⁴, Charles Decraene⁴, Catherine Fournier¹, Gilles Chiocchia¹

1 Institut Cochin, Département d’Immunologie, Hôpital Cochin, Pavillon Hardy A, 27 rue du Faubourg Saint-Jacques, 75674 Paris Cedex 14, France. Inserm, U567; CNRS, UMR 8104; Université Paris Descartes, Faculté de Médecine René Descartes, UMR-S 8104, 75014 Paris, France
2 Institut Cochin, Plate-Forme de Séquençage et Génomique, Paris, France
3 Service de Rhumatologie, Hôpital de la Cavale Blanche, Brest, France
4 Institut Curie, Plate-forme de Génomique Fonctionnelle, Département de Transfert, 26 rue d’Ulm, Paris, France

* Corresponding Author: G. Chiocchia,

European Cytokine Network 2005, 16(4), 289-292.

Abstract

Since cytokines and chemokines are important actors in rheumatoid arthritis (RA), the aim of this study was to compare the gene expression profiles in cultured fibroblast-like synoviocytes (FLS) obtained from patients with either RA, or osteoarthritis (OA), focusing our analysis on genes for cytokines and chemokines, and their respective receptors. Gene expression in cultured FLS (third passage) from eight patients with RA (RA-FLS) were compared with gene expression in cultured FLS from nine patients with OA (OA-FLS) using Affymetrix Human Genome U133 Plus 2.0 Array microarray, allowing analysis of over 54,000 transcripts. Among the 171 genes studied (241 probes), limiting the selection of differentially expressed genes to a significant value (p < 0.05), and a differential ratio of expression > 1.6, only four genes, namely IL-32, CCL2, PF4F1 and GDF10 were found to be differentially expressed. Out of these four genes, only higher expression of CCL2 has been reported previously in RA. The newly described cytokine IL-32 was the most prominently differentially expressed gene in the present study, with higher expression in RA-FLS than in OA-FLS (p < 0.0073). IL-32 might have a previously unidentified pivotal role in RA.

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Keywords

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