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Published in: Arthritis Research & Therapy 5/2008

Open Access 01-10-2008 | Research article

Vitamin D deficiency in undifferentiated connective tissue disease

Authors: Eva Zold, Peter Szodoray, Janos Gaal, János Kappelmayer, Laszlo Csathy, Edit Gyimesi, Margit Zeher, Gyula Szegedi, Edit Bodolay

Published in: Arthritis Research & Therapy | Issue 5/2008

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Abstract

Introduction

Both experimental and clinical data provide evidence that vitamin D is one of those important environmental factors that can increase the prevalence of certain autoimmune diseases such as systemic lupus erythematosus, rheumatoid arthritis, insulin-dependent diabetes mellitus, and inflammatory bowel disease. The aim of the present study was to investigate the prevalence of vitamin D insufficiency in patients with undifferentiated connective tissue disease (UCTD).

Methods

Plasma 25(OH)D3 levels in 161 UCTD patients were measured in both summer and winter periods. Autoantibody profiles (antinuclear antibody, anti-U1-ribonucleoprotein, anti-SSA, anti-SSB, anti-Jo1, anti-Scl70, anti-double-stranded DNA, anti-centromere, anti-cardiolipin, rheumatoid factor, and anti-cyclic citrullinated peptide) and clinical symptoms of the patients were assessed.

Results

Plasma levels of 25(OH)D3 in UCTD patients were significantly lower compared with controls in both summer and winter periods (UCTD summer: 33 ± 13.4 ng/mL versus control: 39.9 ± 11.7 ng/mL, P = 0.01; UCTD winter: 27.8 ± 12.48 ng/mL versus control: 37.8 ± 12.3 ng/mL, P = 0.0001). The presence of dermatological symptoms (photosensitivity, erythema, and chronic discoid rash) and pleuritis was associated with low levels of vitamin D. During the average follow-up period of 2.3 years, 35 out of 161 patients (21.7%) with UCTD further developed into well-established connective tissue disease (CTD). Patients who progressed into CTDs had lower vitamin D levels than those who remained in the UCTD stage (vitamin D levels: CTD: 14.7 ± 6.45 ng/mL versus UCTD: 33.0 ± 13.4 ng/mL, P = 0.0001).

Conclusions

In patients with UCTD, a seasonal variance in levels of 25(OH)D3 was identified and showed that these levels were significantly lower than in controls during the corresponding seasons. Our results suggest that vitamin D deficiency in UCTD patients may play a role in the subsequent progression into well-defined CTDs.
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Metadata
Title
Vitamin D deficiency in undifferentiated connective tissue disease
Authors
Eva Zold
Peter Szodoray
Janos Gaal
János Kappelmayer
Laszlo Csathy
Edit Gyimesi
Margit Zeher
Gyula Szegedi
Edit Bodolay
Publication date
01-10-2008
Publisher
BioMed Central
Published in
Arthritis Research & Therapy / Issue 5/2008
Electronic ISSN: 1478-6362
DOI
https://doi.org/10.1186/ar2533

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