Increased levels of interleukin-33 associated with bone erosion and interstitial lung diseases in patients with rheumatoid arthritis

Department of Rheumatology, 1st Affiliated Hospital of China Medical University, Shen Yang 110001, China.
Cytokine (Impact Factor: 2.87). 04/2012; 58(1):6-9. DOI: 10.1016/j.cyto.2011.12.010
Source: PubMed

ABSTRACT To analyze the levels of interleukin-33 (IL-33) in the serum of patients with rheumatoid arthritis (RA) and investigated its possible pathophysiological importance.
The concentrations of IL-33 and matrix metalloproteinase (MMP)-3 were measured by enzyme-linked immunosorbent assay (ELISA) in the serum of 121 patients with RA and 47 controls. Erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), rheumatoid factor (RF), and anticyclic citrullinated peptide (anti-CCP) were measured by standard laboratory techniques. Interstitial lung disease (ILD) was identified on high-resolution computed tomography. Disease activity in RA was scored with the Disease Activity Score 28 based on C-reactive protein levels (DAS28-CRP). The bone erosion of RA patients was evaluated by modified Sharp Score (MSS).
Serum levels of IL-33 and MMP-3 were significantly higher in RA patients than in healthy controls. Significant higher levels of IL-33 were found in CCP-positive group and in patients with ILD. There was positive correlation between the levels of IL-33 and RF. Moreover, there was also positive correlation between IL-33 and MMP-3, MSS.
These data support the hypothesis that IL-33 may be involved in RA pathogenesis and it may partly contribute to the bone erosion in RA patients.

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    • "However, the same group found that in STEMI patients elevated IL-33 was associated with increased 30-days and 1-year mortality [24]. Moreover, circulating IL-33 levels were shown to be increased in patients with different immune-inflammatory diseases such as rheumatoid disorders [23] [41], systemic sclerosis [42], and ulcerative colitis [43]. Some limitations of the present study have to be acknowledged. "
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    Cytokine 06/2014; 67(2):65–70. DOI:10.1016/j.cyto.2014.02.014 · 2.87 Impact Factor
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    • "Interestingly, increased levels of IL-33 in RA patients were correlated with interstitial lung diseases and bone erosion [30] "
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    ABSTRACT: Interleukin-33 (IL-33) is a recently described member of the IL-1 family. IL-33 acts as an alarmin, chemoattractant, and nuclear factor. ST2, a member of the Toll-like receptor/IL-1R superfamily, the receptor of IL-33, triggers a plethora of downstream effectors and leads the activation of NFK-B, leading the expression of several genes. IL-33 and ST2 are expressed in the majority of cell types, and the IL-33/ST2 axis has a role in immune response, bone homeostasis, and osteoclastogenesis. Several studies show opposite roles of IL-33 in osteoclastogenesis and the implication in bone biology. Few works studied the role of IL-33 in periodontal disease, but we hypothesize a possible role of IL-33 in periodontal disease and bone loss.
    Mediators of Inflammation 02/2014; 2014:342410. DOI:10.1155/2014/342410 · 3.24 Impact Factor
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    • "It was reported that sST2 administration could also attenuate the severity of CIA [4]. Some recent studies have further shown that IL-33 is expressed by the synovial fibroblasts from RA patients [2] [3] [5] and the serum level of IL-33 is abnormally elevated in these patients [6] [7] [8] [9]. However, the levels of IL-33 and sST2 in the synovial fluid (SF) and whether they are associated with disease activity are less known. "
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    ABSTRACT: Objectives. IL-33, a newly found cytokine which is involved in joint inflammation, could be blocked by a decoy receptor-sST2. The expression and correlation of IL-33 and sST2 in rheumatoid arthritis (RA) are of great interest. Methods. Synovial fluid (SF) was obtained from 120 RA and 30 osteoarthritis (OA) patients, and paired sera were collected from 54 of these RA patients. The levels of IL-33 and sST2 were measured by ELISA. Results. SF IL-33 was significantly higher in RA than in OA, which was correlated with disease activity score 28, erythrocyte sedimentation rate, rheumatoid factor (RF)-IgM, RF-IgG, glucose phosphate isomerase (GPI), and immunoglobulin. Serum IL-33 was correlated positively with SF IL-33 in RA. Furthermore, it was correlated with RF-IgM and GPI. sST2 was partly detectable in RA (13 out of 54, 24.1%), while not in OA. Serum sST2 in RA had no significant correlation with serum IL-33 or SF IL-33. However, SFs from both RA and OA patients did not express sST2. Conclusions. This study supported that IL-33 played an important role in the local pathogenesis of RA. Considering the tight correlation between IL-33 and clinical features, it may become a new target of local treatment.
    Clinical and Developmental Immunology 09/2013; 2013:985301. DOI:10.1155/2013/985301 · 2.93 Impact Factor
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