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Serum IL-33 Levels Are Raised in Patients with Systemic Sclerosis: Association with Extent of Skin Sclerosis and Severity of Pulmonary Fibrosis

Overview
Journal Clin Rheumatol
Publisher Springer
Specialty Rheumatology
Date 2011 Jan 20
PMID 21246230
Citations 56
Authors
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Abstract

To determine serum interleukin-33 (IL-33) levels and their associations with clinical parameters in patients with systemic sclerosis (SSc). Serum IL-33 levels were examined by enzyme-linked immunosorbent assay in 69 patients with SSc and 30 healthy individuals. In a retrospective longitudinal study, sera from 14 patients with SSc were analyzed (follow-up, 1-7 years). Serum IL-33 levels were elevated in SSc patients (261.7 ± 141.9 pg/ml) compared with healthy individuals (174.9 ± 72.4 pg/ml; P < 0.001). Patients with diffuse cutaneous SSc had higher levels of IL-33 (287.5 ± 146.6 pg/ml) than those with limited cutaneous SSc (221.5 ± 126.5 pg/ml; P < 0.05). Pulmonary fibrosis and decreased forced vital capacity were more commonly found in patients with elevated IL-33 levels than in those with normal IL-33 levels. IL-33 levels correlated positively with the extent of skin sclerosis, and inversely with percent predicted forced vital capacity. IL-33 levels were increased in SSc patients and correlated with the extent of skin sclerosis and the severity of pulmonary fibrosis. Therefore, IL-33 possibly plays a role in cutaneous and pulmonary fibrosis in SSc patients.

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