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Islet cell, thyroid, adrenal and celiac disease related autoantibodies in patients with Type 1 diabetes from Sri Lanka


, : Islet cell, thyroid, adrenal and celiac disease related autoantibodies in patients with Type 1 diabetes from Sri Lanka. Journal of Endocrinological Investigation 29(11): 968-974

The prevalence of islet cell, thyroid, adrenal and celiac disease related autoantibodies in patients with Type 1 diabetes mellitus (Type 1 DM) from Sri Lanka is described. Autoantibodies to glutamic acid decarboxylase 65 (GAD65Ab), protein tyrosine phosphatase IA-2 (IA-2Ab), insulin (IAAb), thyroglobulin (TgAb), thyroid peroxidase (TPOAb), TSH receptor (TRAb), 21-hydroxylase (21-OHAb) and tissue transglutaminase (tTGAb) were measured in 122 Type 1 DM patients who had low C-peptide activity or were >20 yr old at the time of diagnosis and in 100 non-diabetic blood donors. GAD65Ab and/or IA-2Ab were present in 74/122 (60.7%) Type 1 DM subjects with a significantly higher prevalence compared to non-diabetic controls (no. 100) (GAD65Ab-59 vs 4%; IA-2Ab-14 vs 0%; respectively) (p<0.001). The median (inter-quartile range) Type 1 DM duration in antibody positive subjects was 3.3 (0.99-6.9) vs 4.9 (1.7-7.5) yr in antibody negative subjects (p=0.23). IA-2Ab prevalence decreased with disease duration > or =5 yr (19 vs 4%) (p<0.001). There was no difference in the prevalence of TgAb (25 vs 33%)(p=0.21) and TPOAb (22 vs 18%) (p=0.48) in Type 1 DM and non-diabetic subjects. Also, there was no difference in TgAb and TPOAb prevalence in antibody positive Type 1 DM (34.7%) compared to antibody negative Type 1 DM (24.4%) subjects (p=0.24). tTGAb (3/119) and TRAb (1/119) were found in low prevalence and 21-OHAb were not detected. Diabetes associated autoantibodies were detected in the majority of Type 1 DM subjects, suggesting a major role for autoimmunity in the pathogenesis of Type 1 DM in Sri Lankans. The prevalence of TgAb and TPOAb in Type 1 DM subjects and non-diabetic controls was relatively high and similar in both groups.

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PMID: 17259793


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