ESPE Abstracts

Background: Vitamin D dependent rickets type I (VDDR1) is an autosomal recessive disorder caused by mutations in the 25-Hydroxyvitamin-D3 1-α-hydroxylase gene(CYP27B1).Objective and hypotheses: To evaluate clinical characteristics and molecular genetic analysis of the pediatric patients with VDDR1 who were being followed at Diyarbakir Children’s State Hospital, Turkey.Method: VDDR1 diagnosis was consid...

Background: 25-OH vitamin D levels in newborns depend directly on their mother’s status. In a previous study, 25-OH vitamin D levels were determined in cord blood in a cohort of women after winter months, showing deficient values in 94% of population (mean 25-OH vitamin D value 10.4±6.1 ng/ml). Correlation between low 25-OH vitamin D levels and low sun exposure, dark skin phototype and Indo-Pakistani ethnicity were observed.Objective and hypoth...

Background: Type 1 diabetes mellitus (T1DM) is an autoimmune and inflammatory process and vitamin D (VD) is thought to reduce inflammation and prevent autoimmune destruction. Studies have shown that VD has an effect on insulin secretion and sensitivity in rats. And it has been shown that adult T2DM with normal levels of VD have decreased insulin requirements. Two prior studies in Turkey looked at the relationship between VD levels and daily insulin requirement in paediatric pa...

Background: Polycystic ovary syndrome (PCOS) is a common reproductive endocrinopathy in women of childbearing age, affecting 5–10% women in this age group. Its suggestive cardinal features are hyperandrogenism, ovulatory dysfunction and/or polycystic ovary appearance. The diagnostic gold standard tool is pelvic ultrasound (PUS) which may be limited in overweight and obese adolescent girls.Objective and hypotheses: To evaluate the contribution of pel...

Background: Raine syndrome (RS) also known as lethal osteosclerotic bone dysplasia, is a rare autosomal recessive bone disorder. Most of patients with RS die within the first days or weeks of life due to pulmonary hypoplasia. The causative gene FAm20C is located on chromosome 7p22.3. FAm20C is one of the genes that regulate phosphate production. Here, we present a case of RS with hypophosphatemic rickets and a new mutation in FAm2</s...

Introduction and Aim: FGF-23 is a hormone that works by inhibiting phosphorus reabsorption in kidneys, and systematic regulation of phosphate homeostasis by FGF23 depends on the activity of the membrane protein Klotho. It affects the active vitamin level according to the bioactive free vitamin hypothesis, which binds DVBP to vitamin D and prolongs its half-life. In this study, it was aimed to investigate 1.25 (OH) Vitamin D, Vitamin D Binding Protein, FGF-23 a...

XY, 14 years old, was born at term, birth weight 4900 g, length 54 cm. No problems reported in the early years of life. Due to recurrent abdominal pain for several years associated with dyspepsia, at 13 years he performed blood tests, with evidence of hypocalcemia (6.1 mg/dl) and hyperphosphatemia (8.6 mg/dl). For this reason, he was admitted to our ward: the weight was Kg 67.1 (1.8 SDS), height 168 cm (1.5 SDS), pubertal stage 4, objective examination in the norm. The exams p...

Childhood obesity (CO) is an important risk factor for the development of many chronic metabolic diseases in adulthood. Understanding the mechanisms that promote childhood obesity and eliminating these causes in childhood are critical for later life. One of the major complications of obesity is insulin resistance. The purpose of this study is to investigate the relationship between sunlight exposure and insulin resistance in childhood. Specifically, it examines how the duratio...

X-linked hypophosphatemia (XLH, MIM 307800) is a rare hereditary disorder of bone metabolism characterized by growth impairment, leading to bone deformities and short stature and beside others to muscle function deficits. XLH is caused by defect of endopeptidase PHEX leading to high levels of FGF-23 and thereby renal phosphate wasting. While conventional treatment includes substitution of phosphate and 1-25 OH-Vitamin D, now a treatment with a FGF-23 antibody (burosumab) is av...

Background: Hereditary hypomagnesemia with secondary hypocalcemia (HSH) is a are autosomal recessive disorder which presents in early infancy with generalized convulsions, or other symptoms related to increased neuromuscular excitability. Several mutations in the TRPM6 gene have been described. Early diagnosis is an effective means of preventing the inevitable neurocognitive sequelae which occur in the absence of appropriate treatment.<s...