Secretor status and infection in patients with Graves' disease
Autoimmunity 1990;7(4):279-289 Toft AD, Blackwell CC, Saadi AT, Wu P, Lymberi P, Soudjidelli M, Weir DM Department of Medicine, Medical School, University of Edinburgh, Scotland.
We have demonstrated that the inability to secrete the water soluble glycoprotein form of the [ABO Blood Group? ABO blood group] antigens into saliva is significantly more common in patients with Graves' disease than control subjects (40% vs 27%: P less than 0.025) but not among those with Hashimoto's thyroiditis or spontaneous primary atrophic hypothyroidism. Non-secretion is associated with increased susceptibility to infection and to asymptomatic carriage of some microorganisms. Although Yersinia enterocolitica has been found to express antigen? cross reactive with the TSH receptor, we did not find an increased prevalence of Yersinia species in the faeces of 107 patients with Graves' disease. The isolation rate (less than 1%) was similar to that observed in the local population with diarrhoeal illness.
Salivary IgA? levels determined by whole cell ELISA with Y. enterocolitica 03 were not elevated in the majority of specimens examined. The results suggest that in contrast to reports from Scandinavia, there is no strong evidence that yersiniae play a role in the pathogenesis of Graves' disease among patients in South east Scotland. Non-secretors? are significantly over represented among patients with several other autoimmune diseases; however, with the exception of antitubulin antibodies, non-secretors with Graves' disease did not have more antibodies to other human antigens than secretor? patients.
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