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Duffau P, Menn-Josephy H, Cuda CM, Dominguez S, Aprahamian TR, Watkins AA, Yasuda K, Monach P, Lafyatis R, Rice LM, Kenneth Haines G, Gravallese EM, Baum R, Richez C, Perlman H, Bonegio RG, Rifkin IR. Promotion of Inflammatory Arthritis by Interferon Regulatory Factor 5 in a Mouse Model. Arthritis Rheumatol 2016; 67:3146-57. [PMID: 26315890 DOI: 10.1002/art.39321] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Accepted: 08/04/2015] [Indexed: 01/03/2023]
Abstract
OBJECTIVE Polymorphisms in the transcription factor interferon regulatory factor 5 (IRF5) are associated with an increased risk of developing rheumatoid arthritis (RA). This study was undertaken to determine the role of IRF5 in a mouse model of arthritis development. METHODS K/BxN serum-transfer arthritis was induced in mice deficient in IRF5, or lacking IRF5 only in myeloid cells, and arthritis severity was evaluated. K/BxN arthritis was also induced in mice deficient in TRIF, Toll-like receptor 2 (TLR2), TLR3, TLR4, and TLR7 to determine the pathways through which IRF5 might promote arthritis. In vitro studies were performed to determine the role of IRF5 in interleukin-1 (IL-1) receptor and TLR signaling. RESULTS Arthritis severity was reduced in IRF5-deficient, TRIF-deficient, TLR3-deficient, and TLR7-deficient mice. The expression of multiple genes regulating neutrophil recruitment or function and bioactive IL-1β formation was reduced in the joints during active arthritis in IRF5-deficient mice. In vitro studies showed that TLR7 and the TRIF-dependent TLR3 pathway induce proinflammatory cytokine production in disease-relevant cell types in an IRF5-dependent manner. CONCLUSION Our findings indicate that IRF5 contributes to disease pathogenesis in inflammatory arthritis. This is likely due at least in part to the role of IRF5 in mediating proinflammatory cytokine production downstream of TLR7 and TLR3. Since TLR7 and TLR3 are both RNA-sensing TLRs, this suggests that endogenous RNA ligands present in the inflamed joint promote arthritis development. These findings may be relevant to human RA, since RNA capable of activating TLR7 and TLR3 is present in synovial fluid and TLR7 and TLR3 are up-regulated in the joints of RA patients.
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Affiliation(s)
- Pierre Duffau
- Boston University School of Medicine, Boston, Massachusetts, and Hôpital Saint-André, Centre Hospitalier Universitaire de Bordeaux and Université de Bordeaux, CNRS UMR 5164, Bordeaux, France
| | | | | | | | | | | | - Kei Yasuda
- Boston University School of Medicine, Boston, Massachusetts
| | - Paul Monach
- Boston University School of Medicine, Boston, Massachusetts
| | | | - Lisa M Rice
- Boston University School of Medicine, Boston, Massachusetts
| | | | | | - Rebecca Baum
- University of Massachusetts Medical School, Worcester
| | - Christophe Richez
- Hôpital Pellegrin, Centre Hospitalier Universitaire de Bordeaux, and Université de Bordeaux, CNRS UMR 5164, Bordeaux, France
| | | | | | - Ian R Rifkin
- Boston University School of Medicine, Boston, Massachusetts
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Baune BT, Eyre H. Anti-inflammatory effects of antidepressant and atypical antipsychotic medication for the treatment of major depression and comorbid arthritis: a case report. J Med Case Rep 2010; 4:6. [PMID: 20157432 PMCID: PMC2821395 DOI: 10.1186/1752-1947-4-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2009] [Accepted: 01/12/2010] [Indexed: 12/31/2022] Open
Abstract
Introduction This case report describes the effects of psychotropic treatment, quetiapine in particular, on systemic inflammation, pain, general functioning and major depression in the treatment of a woman with arthritis. Case presentation A 49-year-old Caucasian Australian woman with arthritis, pain and depression was treated with a course of escitalopram, mirtazapine and quetiapine. Pain levels, general functioning and degree of depressive symptoms were evaluated with a visual analogue scale. Systemic inflammation had been assessed by C-reactive protein serum levels since 2003. C-reactive protein levels, physical pain, symptoms of arthritis and depression decreased significantly during the past 12 months of treatment with quetiapine, while treatment with selective serotonin reuptake inhibitors and mirtazapine remained the same. Conclusions We suggest that the treatment particularly with quetiapine may have anti-inflammatory effects in arthritis and comorbid major depression, which eventually led to a remission of pain and depression and to normal general function.
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Affiliation(s)
- Bernhard T Baune
- Psychiatry and Psychiatric Neuroscience, School of Medicine and Dentistry, James Cook University, Townsville 4811, Australia
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