A 24-month prospective study on the efficacy and safety of two different monthly regimens of vitamin D supplementation in pre-menopausal women with systemic lupus erythematosus
Lupus April 2015 vol. 24 no. 4-5 499-506 doi: 10.1177/0961203314559089
L Andreoli1⇑; F Dall’Ara1,2; S Piantoni1,2; A Zanola1; N Piva1; M Cutolo3; A Tincani1
1Rheumatology and Clinical Immunology, Spedali Civili and Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy
2Rheumatology Chair, University of Pavia, Pavia, Italy
3Research Laboratory and Academic Division of Rheumatology, Department of Internal Medicine, University of Genova, Genova, Italy
Laura Andreoli, Rheumatology and Clinical Immunology Unit, Spedali Civili of Brescia Piazzale Spedali Civili 1, 25123, Brescia, Italy. Email: laura.andreoli at unibs.it
Background Low vitamin D (vit.D) serum levels are common in patients with systemic lupus erythematosus (SLE) and seem to correlate with higher disease activity. We investigated the effects of different regimens of vit.D supplementation in SLE patients with inactive disease.
Methods This 24-month prospective study included 34 SLE women who were randomized to receive, together with their ongoing treatment, a standard regimen (SR) of cholecalcipherol (25,000 IU monthly) or an intensive regimen (IR) (300,000 UI initial bolus followed by 50,000 IU monthly) for one year and then were switched to the other regimen in the second year. Patients were seen quarterly for assessment of 25-OH vit.D levels, disease activity, SLE serology and bone metabolism markers.
Results By intra-patient comparison, only the IR was found able to significantly raise vit.D serum levels. After 12 months, values above 30 ng/ml were found in 75% of patients in IR while in only 28% in SR. No significant differences in disease activity and SLE serology were found at any time point between SR and IR. No changes in the mineral metabolism were observed.
Conclusions The IR was safe and effective in obtaining sufficient levels of vit. D in most SLE patients. However, both regimens of supplementation did not differently affect disease activity nor SLE serology.
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