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Rheumatology (Oxford). 2012 Mar;51(3):544-51. doi: 10.1093/rheumatology/ker352. Epub 2011 Nov 24.

25-Hydroxyvitamin D deficiency is associated with increased aortic stiffness in patients with systemic lupus erythematosus.

Author information

1
University of Manchester, Manchester M13 9PT, UK.

Abstract

OBJECTIVE:

To determine the relationship between serum vitamin D and markers of subclinical cardiovascular disease (CVD) in patients with SLE.

METHODS:

We recruited SLE patients (≥ 4 ACR 1997 criteria) from outpatient clinics between January 2007 and January 2009. Vitamin D deficiency was defined as serum 25(OH)D <20 ng/ml measured by ELISA. Disease activity was measured using the SLEDAI-2K score. Aortic pulse wave velocity (aPWV) was measured using PulseTrace 3600 (Micromedical) and carotid plaque (CP) and intima-media thickness (IMT) assessed using B-mode Doppler US.

RESULTS:

Seventy-five women with SLE were recruited with a median (interquartile range) disease duration of 16 (8-27) years. Patients with vitamin D deficiency had higher BMI (P = 0.014) and insulin resistance (P = 0.023) than those with 25(OH)D >20 ng/ml. Subjects with SLEDAI-2K ≥ 4 had lower 25(OH)D than those with SLEDAI-2K <4 (median 12.9 vs 20.3 ng/ml, P = 0.031). Aortic stiffness was significantly associated with serum 25(OH)D [log(aPWV) β (95% CI) -0.0217 (-0.038, -0.005), P = 0.010] independently of BMI, CVD risk factors and serum insulin. Adjustment for disease activity reduced the strength of the association. There was no association between 25(OH)D and CP or IMT.

CONCLUSIONS:

Vitamin D deficiency is associated with increased aortic stiffness in SLE, independent of CVD risk factors and insulin. Increased inflammatory disease activity may be the mechanism by which vitamin D deficiency mediates vascular stiffness in this patient group.

PMID:
22120462
PMCID:
PMC3281497
DOI:
10.1093/rheumatology/ker352
[Indexed for MEDLINE]
Free PMC Article

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