MODY3 in the children and adolescents: the molecular-genetic basis and clinico-laboratory manifestations

Abstract

The present study of HNF1А gene involved 121 children suspected to have the nonimmune-mediated form of diabetes mellitus. Diagnosis of MODY3 was verified in 18 (19.4%) probands. Disturbances of carbohydrate metabolism in one of the parents were documented in 94.5% of the cases. Metabolic disorders were revealed in the probands at the mean age of 11.65 years (9.8; 14.6), the clinical manifestations of diabetes mellitus (DM) were apparent in 16.7% of the children, the fasting blood glucose level was 7.5 mmol/l, HbA1c 6.6% (6.5; 7.7), 66.7% of the children had a history of glucosuria and 33.3% suffered obesity. The normal fasting blood glucose and HbA1c levels were found in 22.2% of the children. In 100% of the cases, results of OGTT suggested diabetes despite insulin secretion. Low titers of anti-GAD and anti-IA2 antibodies were detected in 20.0 and 22.2% of the children respectively. The most common mutation was p.P291fs.