Anticuerpos antitiroperoxidasa y antitransglutaminasa en familiares de primer grado de personas con diabetes tipo 1 y su relación con algunas características clínicas, bioquímicas e inmunológicas

introduction: the antithyroperoxidase (tpoab) and antitransglutaminase (ttgab) antibodies are useful markers of autoimmune thyroid disease and celiac disease, respectively. its presence in first-degree relatives of type 1 diabetes patients has not been described in cuba. objective: to determine the tpoab and ttgab frequencies in first-degree relatives of type 1 diabetes patients and its relation to some clinical, biochemical and immunological features. methods: in a group of 285 subjects we measured tpoab and in 262 subjects we measured ttgab. the cases included aged between 2 and 65. data were registered on age, sex, skin color, personal backgrounds, and a family history of obesity, type 2 diabetes, thyroid disease and celiac disease. symptoms were look for and clinical signs of celiac disease and autoimmune thyroid disease were explored. fasting glucose, fasting insulin, tpoab, ttgab and type 1 diabetes associated autoantibodies (agad and aia-2) were determined as well as the insulin resistance according the homa-ir index. results: the frequencies of positive tpoab and ttgab were of 5,3 and 1,9%, respectively. the family history of thyroid disease, slight muscular tremor and exophthalmos are related to presence of tpoab. intestinal malabsorption, persistent diarrhea, recurrent abdominal pain and personal background of liver disease were associated with presence of ttgab. there was an association between ttgab and aia-2. insulin resistance was not associated with the presence of both antibodies. conclusions: in first-degree relatives of type 1 diabetes patients, frequencies of tpoab and ttgab are low. some backgrounds, symptoms and signs linked to celiac disease and autoimmune thyroid disease may be practical indicators previous to perform these autoantibodies.