Two systematic review s have evaluated controlled trials among patients with autoimmune thyroiditis and report that selenium supplementation decreases circulating thyroid autoantibodies .
The immunomodulatory effects of selenium might involve reducing proinflammatory cytokine release .
In Graves ’ disease , some , but not all , trials indicate that adjuvant selenium supplementation enhances the restoration of biochemical euthyroidism , and might benefit patients with mild Graves ’ orbitopathy .
The available evidence from trials does not support routine selenium supplementation in the st and ard treatment of patients with autoimmune thyroiditis or Graves ’ disease .
However , correction of moderate to severe selenium deficiency may offer benefits in preventing , as well as treating , these disorders .
Purpose of review This review provides an appraisal of recent evidence for or against selenium supplementation in patients with autoimmune thyroid diseases , and discusses possible effect mechanisms .
Recent findings Epidemiological data suggest an increased prevalence of autoimmune thyroid diseases under conditions of low dietary selenium intake .
However , clinical ly relevant effects of selenium supplementation , including improvement in quality of life , are more elusive .
[The effect of selenium therapy on autoimmune thyroiditis].
UNLABELLED Selenium as an essential trace element is capable of exerting complex effects on the endocrine and immune system by its antioxidant capacity . The role of selenium is important because the level of free oxygen radicals is elevated in the physiological thyroid hormone synthesis . THE AIM OF STUDY was to determine whether selenium therapy can influence the level of antithyroid peroxidase and antithyroglobulin antibodies or whether there is a correlation between antioxidant capacity and the titer of autoantibodies . METHOD 132 patient with autoimmune thyroiditis were investigated in a prospect i ve , blind and placebo-controlled study . L-thyroxine substitution therapy was made in both groups and the level of TSH remained in the normal range . The selenium-treated group ( n = 70 patients , 68 female , mean age 41,4 + /- 9,5 year ) was compared with the placebo-treated group ( n = 62 patients , 61 female , mean age 42,7 + /- 8,3 year ) . Selenium therapy was continued by L-seleno-methionine ( per os 2 x 100 microg/day ) for one year . Determination of TSH , fT4 , fT3 and autoantibodies was carried out by chemiluminescence method . Total antioxidant capacity was determined by R and ox kit , the level of selenium in the sera by atomic absorption technique was measured . In the follow-up study , patients were controlled every third month and at the end of a one-year observation period . RESULTS The level of selenium in the untreated patients was significantly lower than in treated patients and controls . The fT3/fT4 ration proved to be higher in patients after selenium therapy . The titer of antithyroid antibodies ( mostly the antithyroid peroxidase ) significantly decreased at the end of the study . An inverse correlation was found between antioxidant capacity and the level of antithyroid peroxidase antibodies . The volume of thyroid gl and slightly diminished in treated patients . Side effects were not observed . CONCLUSIONS Selenium completed with L-thyroxine is a suitable therapy for patients with autoimmune thyroiditis
Two systematic review s have evaluated controlled trials among patients with autoimmune thyroiditis and report that selenium supplementation decreases circulating thyroid autoantibodies .
The immunomodulatory effects of selenium might involve reducing proinflammatory cytokine release .
In Graves ’ disease , some , but not all , trials indicate that adjuvant selenium supplementation enhances the restoration of biochemical euthyroidism , and might benefit patients with mild Graves ’ orbitopathy .
The available evidence from trials does not support routine selenium supplementation in the st and ard treatment of patients with autoimmune thyroiditis or Graves ’ disease .
However , correction of moderate to severe selenium deficiency may offer benefits in preventing , as well as treating , these disorders .
Purpose of review This review provides an appraisal of recent evidence for or against selenium supplementation in patients with autoimmune thyroid diseases , and discusses possible effect mechanisms .
Recent findings Epidemiological data suggest an increased prevalence of autoimmune thyroid diseases under conditions of low dietary selenium intake .
However , clinical ly relevant effects of selenium supplementation , including improvement in quality of life , are more elusive .