ESPE Abstracts

Background: Dysregulation of phosphate homeostasis in diseases such as tumor-induced osteomalacia and chronic kidney disease are often associated with impairment of musculoskeletal tissue function. While various factors such as intracellular calcium levels and dysegulated endocrine mechanisms are thought to contribute, the role of single factors such as phosphate and its main regulating hormone FGF23 are only partly revealed.Objective and hypotheses: Ino...

Background: Ovarian sex differentiation network involves a panoply of interacting factors. Yet, no single sex-determining factor has been identified to be an equivalent of SRY or SOX9 in the testis. Recently, data suggested CBX2 as a pioneer regulator promoting testis development. In addition to its implication in ovary pathway differentiation which remains unclear.Objective and hypotheses: To deepen our understanding of the regulatory network that under...

Background: Single nucleotide polymorphisms (SNPs) related to genes encoding the FSHβ subunit and FSH receptor (FSHB/FSHR) affect FSH production (FSHB c.-211G>T) and receptor sensitivity/expression in vitro (FSHR c.2039A>G & FSHR c.-29G>A). FSHR c.2039A>G, but not FSHR c.-29G>A, is associated with increased FSH levels in adult women, while there are conflicting results on F...

Background: At a population level, increasing age/sex corrected BMI Z-score (BMI-Z) is associated with increased risk of complications. It is unclear whether severity of obesity is a good predictor of comorbidities within groups of obese children. This knowledge is required to inform clinical management and pathways of care.Objective and hypotheses: In obese youth, to identify whether 1 increasing BMI-Z+/− waist/height ratio(WHtR) is associated wit...

Background: A positive relationship between an individual surgeon’s operative volume and clinical outcomes after paediatric and adult thyroidectomy is well-established. The impact of a hospital’s paediatric operative volume on surgical outcomes and healthcare utilisation, however, are infrequently reported. We investigated associations between hospital volume and healthcare utilisation outcomes following paediatric thyroidectomy in Canada’s larg...

Results: During the years of this study, the prevalence of NB reported as suspected with CH was 1:1220 NB, showing a stable trend on the linear tendency analysis; when adjusted for cases with confirmed high values of TSH in umbilical cord measurement, the prevalence is 1:3041 NB. Regarding the demographic data of the patients analyzed, it was found 54% were men and 46% women. Of the total CH cases with a reported weight, 20% weighted less ...

Background: Hypogonadotropic hypogonadism is characterised by inadequate secretion of gonadotropins (luteinising hormone (LH) and follicle-stimulating hormone (FSH)) leading to absent, partial or arrested puberty. In males, classical treatment with testosterone promotes virilisation but does not facilitate testicular growth and spermatogenesis. Conversely, treatment with gonadotropins or gonadotropin-releasing hormone (GnRH) stimulates Sertoli and Leydig cells...

Background: Type 2 diabetes (T2D) is an emerging disease in the pediatric population. The association between T2D and non-alcoholic fatty liver disease (NAFLD) has been described; this increases the risk of coronary heart disease (CHD). Recent evidence suggests that sizes and composition of HDL may be more important that HDL-C levels in predicting CHD. There is not data regarding the HDL subclasses distribution and composition in T2D youths with hepatic steatosis (HE).<p c...

Background: Familial Hypocalciuric Hypercalcemia (FHH) type 1 is a benign condition of hypercalcemia with autosomal dominant inheritance caused by pathogenic variants in the calcium-sensing receptor gene (CASR). CaSR plays a crucial role in the regulation of calcium balance. Inactivating mutations in CASR result in altered calcium-sensing and inappropriate parathyroid hormone (PTH) release concerning the calcium concentration. Dysplasia Epiph...

Background: Sexual maturation is closely linked to growth, suggesting common pathways between the reproductive development and the growth hormone/insulin-like growth factor-I (GH/IGF-I) axis. IGF-I bioavailability is regulated by Pregnancy associated plasma protein-A (PAPP-A), Pregnancy associated plasma protein-A2 (PAPP-A2) and Stanniocalcin 2 (STC2). A large genome-wide association study (GWAS) identified PAPP-A, PAPP-A2 and STC2 to represent loci strongly a...