Objective:To investigate the relationship between zonulin levels and clinical and laboratory parameters of childhood obesity.Methods:The study included obese children with a body mass index (BMI) >95th percentile and healthy children who were of similar age and gender distribution. Clinical (BMI, waist circumferences, mid-arm circumference, triceps skinfold, percentage of body fat, systolic blood pressure, diastolic blood pressure) and biochemical (glucose, insulin, lipid levels, thyroid function tests, cortisol, zonulin and leptin levels) parameters were measured.Results:A total of 43 obese subjects (23 males, mean age: 11.1±3.1 years) and 37 healthy subjects (18 males, mean age: 11.5±3.5 years) were included in this study. Obese children had significantly higher insulin, homeostasis model assessment of insulin resistance, triglyceride, total cholesterol, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol (HDL-C), zonulin and leptin levels than healthy children (p<0.05), while glucose levels were not different (p>0.05). Comparison of the obese children with and without insulin resistance showed no statistically significant differences for zonulin levels (p>0.05). Zonulin levels were found to negatively correlate with HDL-C and positively correlate with leptin levels, after adjusting for age and BMI.Conclusion:To the best of our knowledge, this is the first study investigating the relationship between circulating zonulin level (as a marker of intestinal permeability) and insulin resistance and leptin (as markers of metabolic disturbances associated with obesity) in childhood obesity. The results showed that zonulin was significantly higher in obese children when compared to healthy children, a finding indicating a potential role of zonulin in the etiopathogenesis of obesity and related disturbances.

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The results of this study showed that mutations in the GCK gene are the leading cause of MODY in our population. Moreover, genetic diagnosis could be made in 29% of Turkish patients, and five novel mutations were identified.

Objective This study aimed to evaluate presentations of new-onset type 1 diabetes mellitus in a pediatric cohort during the coronavirus disease 2019 pandemic. Materials and Methods: This study was designed as a single-center, descriptive, cross-sectional retrospective study. The patients diagnosed with new-onset type 1 diabetes mellitus between April 1, 2020, and April 1, 2021, were included in the study. The rate of severe acute respiratory syndrome coronavirus 2 polymerase chain reactivity-positivity was investigated. The pandemic period was compared with the same period of the pre-pandemic 2 years in terms of number of new-onset type 1 diabetes mellitus patients, rate of presentation with diabetic ketoacidosis, and degree of diabetic ketoacidosis severity. Results: In total, 56 patients were diagnosed with type 1 diabetes mellitus during the pandemic and 2 (3.57%) of them tested positive for severe acute respiratory syndrome coronavirus 2 polymerase chain reaction. The number of new-onset type 1 diabetes mellitus patients was 39 in 2019 and 39 in 2018. The rate of presentation with diabetic ketoacidosis was similar in the pandemic period compared to the pre-pandemic periods (53.5% in 2020 vs. 56.4% in 2019 and 53.8% in 2018; P = .94). The proportion of severe diabetic ketoacidosis was also similar in all years, respectively (43.3% in 2020 vs. 45.4% in 2019 and 47.6% in 2018; P = .95). Conclusion: We reported only 2 cases that tested positive for severe acute respiratory syndrome coronavirus 2among the new-onset type 1 diabetes mellitus patients during the pandemic. Although we found an increase in the number of new-onset type 1 diabetes mellitus cases by comparing with prepandemic period, rates of diabetic ketoacidosis and severe diabetic ketoacidosis were similar. There was no finding to suggest that severe acute respiratory syndrome coronavirus 2taking a part in type 1 diabetes mellitus pathogenesis. Since the development of type 1 diabetes mellitus is a long process, prospective studies are needed to investigate the long-term effects of severe acute respiratory syndrome coronavirus 2.