THE CONCENTRATION OF ANTI THYROGLOBULIN (TGAB) AND ANTI THYROID PEROXIDASE (TPOAB) AUTOANTIBODY IN NON-OBESE DIABETIC PATIENTS

Abstract

Introduction: Autoimmune diseases are usually systemic. The autoimmune polyendocrine syndrome was defined as a failure of various endocrine glands caused by an autoimmune mechanism. Autoimmune diabetes (type 1 and LADA) is not exceptional, the long-lasting positivity of anti-GAD may increase the risk of developing thyroid autoimmune diseases. Aims: (1) To determine the concentration and the positivity rate of Thyroglobulin autoantibody (TgAb) and TPO autoantibody (TPOAb) on non-obese diabetic patients. (2) To examine the relationship between thyroglobulin autoantibody (TgAb) and TPO autoantibody (TPOAb) to the negative and positive anti GAD autoantibody status and some other factors. Subjects and methods: 85 serum samples of non-obese diabetic patients (BMI < 23) were used to measure the anti GAD autoantibody, anti Tg and anti TPO autoantibody by enzyme-linked immunoassay and electrochemiluminescence immunoassay, at the Hue university hospital. Results: The mean concentration of the TgAb and TPOAb were 1118.35 ± 1583.45 IU/ml and 85.85 ± 42.22 IU/ml, respectively. The positivity rate of the TgAb was 9.4% and the positive rate of the TPOAb was là 14.1%. There was a statistically significant difference in the positivity of the TPO antibody with the presence or absence of the GAD antibody, between the mean concentration of TPO antibody and diabetes detection time and HbA1C concentration between anti-Tg (+), anti-TPO (+) groups and anti-Tg (-), anti-TPO (-) groups. Conclusions: There was a correlation between anti-TPO positivity with non-obese diabetes patients with positive anti-GAD, between diabetes detection time with anti-TPO concentration. In patients with anti-Tg (+), anti-TPO (+), the HbA1C concentration was found higher than those with anti-Tg(-), anti-TPO(-).  Keywords: diabetes, non-obese, GAD autoantibody, Tg autoantibody, TPO autoantibody.