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  • Title: Screening for associated autoimmunity in children and adolescents with type 1 diabetes mellitus (T1DM).
    Author: Karavanaki K, Kakleas K, Paschali E, Kefalas N, Konstantopoulos I, Petrou V, Kanariou M, Karayianni C.
    Journal: Horm Res; 2009; 71(4):201-6. PubMed ID: 19258711.
    Abstract:
    BACKGROUND/AIMS: Type 1 diabetes (T1DM) is associated with autoimmune thyroid, celiac, autoimmune gastric and Addison's disease. Our aim was to investigate the prevalence of associated autoantibodies in relation to the demographic and beta-cell autoantibody status (anti-GAD). METHODS: Antibodies against thyroid peroxidase (anti-TPO), thyroglobulin (anti-Tg), tissue transglutaminase (anti-tTG IgA), parietal cells (APCA) and adrenal tissue (AAA) were measured in 144 children with T1DM with a mean +/- SD age of 12.3 +/- 4.6 years and a diabetes duration of 4.6 +/- 3.8 years. RESULTS: The prevalence of antibody positivity among our patients was: anti-GAD 53.2%, anti-thyroid (anti-TPO 17.4%, anti-Tg 11.1%); anti-tTG IgA 7.6%, APCA 4.0%, and AAA 0%. Among the children with positive anti-thyroid antibodies, 60% developed autoimmune thyroiditis, while among those anti-tTG IgA positive, 62.5% developed biopsy-confirmed celiac disease. Female gender was more frequent among anti-tTG IgA-positive patients (OR 4.47, p = 0.068), while increasing age was associated with anti-Tg positivity (OR 22.9, p = 0.041). The presence of anti-thyroid antibodies was associated with the presence of anti-GAD (OR 1.45, p = 0.01) and parietal cell antibodies (OR 4.98, p = 0.09). CONCLUSION: Among T1DM patients, the prevalence rates of anti-thyroid and parietal cell antibodies increased with age and diabetes duration. As the presence of anti-GAD was associated with gastric and thyroid autoimmunity, it could serve as marker for the development of additional autoimmunity in adolescents with diabetes.
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