One autoimmune disease lowers vitamin D, a second AI disease does not lower it further

Created January 2015

Vitamin D and autoimmunity: what happens in autoimmune polyendocrine syndromes?

Journal of Endocrinological Investigation, January 2015

G. Bellastella giuseppe.bellastella@unina2.it , M. I. Maiorino, M. Petrizzo, A. De Bellis, A. Capuano, K. Esposito, D. Giugliano

  1. Endocrinology and Metabolic Diseases Unit, Department of Medical, Surgical, Neurological, Metabolic and Geriatric Sciences, Second University of Naples, Piazza L. Miraglia 2, 80138, Naples, Italy

  2. IOS and Coleman Medicina Futura Medical Center, Centro Direzionale, Naples, Italy

  3. Department of Cardio-Thoracic and Respiratory Sciences, Second University of Naples, Naples, Italy

  4. Department of Experimental Medicine, Second University of Naples, Naples, Italy

  5. Department of Clinical and Experimental Medicine, Second University of Naples, Naples, Italy

After one disease empties the vitamin D bucket there is nothing left to empty by another disease If you have such a low level of vitamin D as to have a disease you should restore the level so as to not get another disease associated with low vitamin D

Purpose

To evaluate the Vitamin D status of patients with a single autoimmune disease and of patients with several autoimmune diseases.

Methods

We enrolled 35 patients with isolated type 1 diabetes mellitus (T1DM), 60 with autoimmune polyendocrine syndromes (APS) including T1DM and 72 control subjects. Among patients with APS, 10 were classified as type 2 (Addison’s disease + T1DM), whereas the other 50 as type 3 (autoimmune thyroid disease + T1DM + other autoimmune diseases). Vitamin D (25-OHD) levels were assessed by a chemiluminescent immunoassay in all patients and controls on samples drawn in the morning of the same months.

Results

Both groups of APS and T1DM patients showed 25-OHD levels significantly lower than healthy controls (p < 0.001 for both vs controls), without any significant difference between the two groups (p = 0.80). The highest prevalence of vitamin D deficiency (values <20 ng/ml) was observed in APS type 3 subgroup (8 out of 50 patients, 16 %).

Conclusions

Patients with APS present reduced vitamin D circulating levels, but the vitamin D status is not different between patients with single or multiple autoimmune diseases. The kind of autoimmune disease, rather than the association of several autoimmune diseases, may influence negatively the levels of vitamin D. Further prospective studies are needed to clarify if impaired vitamin D level is a causal factor in the pathogenesis of autoimmune diseases or a consequence of them.

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See also VitaminDWiki

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Tags: Autoimmune Diabetes