Evidence of a significant vitamin D deficiency among 9–13-year-old Polish children: results of a multicentre study
Purpose To evaluate the extent to which the population of Polish preadolescents is vitamin D deficient and to assess seasonal variations in vitamin D status. Participants and methods A total of 720 healthy children aged 9–13 years (409 girls, 311 boys) residing in 6 representative geographical locations in Poland were studied. A parental-assisted questionnaire provided data on nutritional habits, vitamin D supplements and sun exposure. Serum concentration of 25-hydroxyvitamin was determined twice, after the winter in March and after the summer in October. Results In March, vitamin D deficiency (25–50 nmol/L) was found in 64%, and severe deficiency (< 25 nmol/L) in 20.2% of children. In Octo…
Clinical relevance of thyroid-stimulating autoantibodies in pediatric graves' disease-a multicenter study.
Context and Objective: The incidence of TSH receptor (TSHR) stimulating autoantibodies (TSAbs) in pediatric Graves' disease (GD) is controversial. This large, multicenter study evaluated the clinical relevance of TSAbs in children with GD both with Graves' orbitopathy (GO) and without orbital disease. Design: We conducted a cross-sectional retrospective study. Setting: Sera were collected in seven American and European academic referral centers and evaluated in a central laboratory. Patients and Samples: A total of 422 serum samples from 157 children with GD, 101 control individuals with other thyroid and nonthyroid autoimmune diseases, and 50 healthy children were studied. Main Outcome Me…
Functional TSH receptor antibodies in children with autoimmune thyroid diseases
The diagnostic value of the level of TSH receptor antibodies (TSHR-Ab) in the population of children with autoimmune thyroid diseases (AITDs) is still unknown. The aim of this cross-sectional study was to investigate the prevalence of TSHR-Ab in a paediatric cohort with AITD and healthy controls.A total of 240 serum samples were obtained from 205 patients with AITD, type 1 diabetes (T1D), juvenile arthritis (JA), and healthy controls (C). TSHR stimulating (TSI) and -blocking (TBI) immunoglobulins were measured in cell-based bioassays using CHO cells expressing a chimeric TSHR and a c-AMP response-element-dependent luciferase. TSI was reported as percentage of specimen-to-reference ratio (cu…
Exocrine Pancreatic Function in Girls with Anorexia Nervosa
Objectives: To assess pancreatic exocrine function in patients with anorexia nervosa using a breath test with 13C-labeled mixed triglycerides (MTG-BT) and to determine the relationship between the test results and selected biochemical and hormonal parameters. Material and methods: Anthropometric measurements, biochemical and hormonal parameters (serum leptin, soluble leptin receptor (sLR), acylated and desacylated ghrelin, free leptin index (FLI)), and MTG-BT were performed in a group of 31 girls with the restrictive type of AN, as well as 38 healthy girls (C). Results: The average cumulative dose of 13C-triglycerides recovered with exhaled air (%CD) was similar in both study groups, while …
Serum interleukin 15 in anorexia nervosa: Comparison to normal weight and obese girls
Background: Interleukin 15 (IL-15) plays a key role in the muscle-fat interaction, reducing adipose tissue mass without changes in the lean body mass and reduction of food intake. Here we assess serum IL-15 levels in girls with anorexia nervosa (AN) relative to obese and normal weight female adolescents.Methods: Serum IL-15 concentrations were evaluated using a commercially available ELISA kit in 32 Polish girls with restrictive AN, 29 girls with obesity (O), and 21 healthy controls (C). Anthropometric measurements (weight, height, BMI) and laboratory assays (serum fasting glucose, insulin, HOMA-IR, total cholesterol, HDL, LDL, triglycerides, and C-reactive protein (CRP)) were performed.Res…