Disease severity in K/BxN serum transfer-induced arthritis is not affected by IL-33 deficiency

Martin, Praxedis Sina; Talabot-Ayer, Dominique; Seemayer, Christian Alexander; Vigne, Solenne; Lamacchia, Céline; Rodriguez, Emiliana; Finckh, Axel; Smith, Dirk E; Gabay, Cem; Palmer-Lourenco, Gaby

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Title		Disease severity in K/BxN serum transfer-induced arthritis is not affected by IL-33 deficiency
Authors		Martin, Praxedis Sina Talabot-Ayer, Dominique Seemayer, Christian Alexander Vigne, Solenne Lamacchia, Céline Rodriguez, Emiliana Finckh, Axel Smith, Dirk E Gabay, Cem Palmer-Lourenco, Gaby show all authors [1 - 10]
Published in		Arthritis Research and Therapy. 2013, vol. 15, no. 1, p. R13
Abstract		ABSTRACT: INTRODUCTION: Interleukin (IL)-33 is a cytokine of the IL-1 family, which signals through the ST2 receptor. Previous work suggested implication of the IL-33/ST2 axis in the pathogenesis of human and mouse arthritis. Here, we directly investigated the role of endogenous IL-33 in K/BxN serum transfer-induced arthritis by using IL-33 knockout (KO) mice. METHODS: Arthritis was induced by injection of complete K/BxN serum or purified IgG. Disease severity was monitored by clinical and histological scoring. RESULTS: K/BxN serum transfer induced pronounced arthritis with similar incidence and severity in IL-33 KO and wild-type (WT) mice. In contrast, disease development was significantly reduced in ST2 KO mice. IL-33 expression in synovial tissue was comparable in arthritic WT and ST2 KO mice, and absent in IL-33 KO mice. Transfer of purified arthritogenic IgG instead of complete K/BxN serum also resulted in similar arthritis severity in IL-33 KO and WT mice, excluding a contribution of IL-33 contained in the serum of donor mice to explain this result. We investigated additional potential confounding factors, including purity of genetic background, but the mechanisms underlying reduced arthritis in ST2 KO mice remained unclear. CONCLUSIONS: The data obtained with IL-33 KO mice indicate that endogenous IL-33 is not required for the development of joint inflammation in K/BxN serum transfer-induced arthritis. On the contrary, arthritis severity was reduced in ST2 KO mice. This observation might relate to IL-33 independent effects of ST2, and/or reveal the existence of confounding variables affecting the severity of joint inflammation in these KO strains.
Identifiers		DOI: 10.1186/ar4143 PMID: 23324173
Full text		Article (Published version) (2.6 MB) - Free access
Structures		Faculté de médecine / Section de médecine clinique / Département de médecine interne des spécialités Faculté de médecine / Section de médecine fondamentale / Département de pathologie et immunologie Faculté de médecine / Section de médecine fondamentale / Département de physiologie cellulaire et métabolisme
Research group		Mécanisme de l'inflammation articulaire (44)
Citation (ISO format)		MARTIN, Praxedis Sina et al. Disease severity in K/BxN serum transfer-induced arthritis is not affected by IL-33 deficiency. In: Arthritis Research and Therapy, 2013, vol. 15, n° 1, p. R13. https://archive-ouverte.unige.ch/unige:46002