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Abstract
Vitamin D is a steroid hormone that, in addition to its actions on calcium and bone metabolism, exhibits a plethora of regulatory effects on growth, proliferation, apoptosis and function of the cells of the immune system that are relevant to the pathophysiology of systemic lupus erythematosus (SLE). Hypovitaminosis D is highly prevalent in SLE as a result of avoidance of sunshine, photoprotection, renal insufficiency and the use of medications such as glucocorticoids, anticonvulsants, antimalarials and the calcineurin inhibitors, which alter the metabolism of vitamin D or downregulate the functions of the vitamin D receptor. Low levels of vitamin D correlate with disease activity, and is associated with osteoporosis, fatigue and certain cardiovascular risk factors in SLE patients. This review updates the recent evidence on the relationship between vitamin D status and the onset, activity and complications of SLE, and summarizes the recommendations for vitamin D supplementation.
Financial & competing interests disclosure
The author has no relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript. This includes employment, consultancies, honoraria, stock ownership or options, expert testimony, grants or patents received or pending, or royalties.
No writing assistance was utilized in the production of this manuscript.