ESPE Abstracts

Background: Hypophosphatemic rickets (HR) is most commonly X-linked or autosomal dominant, but autosomal recessive (AR) forms have been described. ARHR1 (DMP1) and ARHR2 (ENPP1) share identical biochemical characteristics of excessive renal phosphate wasting due to increased circulating levels of the phosphatonin FGF23 and low serum levels of 1,25(OH)2D. By contrast, in hereditary hypophosphatemic rickets with hypercalciuria (HHRH) phosphaturia is ...

Background: Hypoparathyroidism may manifest either as an isolated disorder or as a component of a more complex syndrome. Molecular genetic studies indicate that mutations in PTH, CASR, GCM2 and GNA11 are causes of isolated hypoparathyroidism (IH) and mutations in GATA3, TBCE, FAM111A, AIRE and TBX1 are associated with different complex syndromes with hypoparathyroidism.Objec...

Background: Hypophosphatasia (HPP) is the rare inherited metabolic disorder resulting from loss-of-function mutation(s) in the tissue-nonspecific alkaline phosphatase (TNSALP) gene. TNSALP deficiency can cause a spectrum of complications in children including premature deciduous tooth loss, rickets, poor growth, and compromised physical function. We previously reported that children, 5–12 years old, with HPP and treated with asfotase alfa, a recombinant bone-targeted huma...

Background: Self-limited delayed puberty (DP) often segregates in an autosomal dominant pattern, suggesting that inheritance is conferred by a small number of genes. However, the underlying genetic background is mostly unknown. By comparison, many genes have been identified where loss-of-function mutations lead to hypogonadotropic hypogonadism (HH). Despite likely overlap between the pathophysiology of delayed puberty and conditions of GnRH deficiency, few studies have examine...

Background: Children with growth hormone deficiency (GHD) may experience physiological symptoms as well as social and emotional problems.Objective and hypotheses: This qualitative study explored the burden of GHD and treatment for children and their parents.Method: 70 interviews were conducted with 39 children (age 8–12) and 31 parents of children with GHD (age 4–12) in Germany, UK and USA. Interviews were analysed using ...

Background: McCune–Albright Syndrome is a combination of polyostotic fibrous dysplasia (BFD), café’-au-lait skin pigmentation and hyperfunctioning endocrinopathies. It results from postzygotic mutations in a-subunit of the Gsalfa protein and the consequent phenotype is a mosaic with high degree of clinical variability.Objective and hypotheses: The aim of the study is determine prevalence and characteristics of GH hypersecretion (GHH) in MA...

Background: Childhood haematopoietic stem cell transplantation and total body irradiation (HSCT/TBI) survivors have multiple risk factors for reduced bone mineral density (BMD) and poor growth. Reduced z-scores from dual energy x-Ray absorptiometry (DEXA) have been reported, but are unreliable in patients with short stature/abnormal body composition.Objective: To investigate the influence of HSCT/TBI on size-corrected BMD in childhood leukaemia ...

Background: The well-documented increased cardiometabolic risk in haematopoietic stem cell transplantation and total body irradiation (HSCT/TBI) survivors is under-recognised using standard (International Diabetes Federation (IDF)) metabolic syndrome (MetS) criteria. This is defined as the presence of central adiposity using increased waist circumference (WC) or BMI, (often not abnormal in HSCT/TBI survivors despite increased central adiposity), plus additional features includ...

Background: Obesity is a potential late-effect of therapies for childhood cancer. Reported prevalence rates of obesity in childhood cancer survivors are heterogenous and currently unavailable for children treated according to protocols of the German Society for Paediatric Oncology. Furthermore, risk factors for the development of obesity following childhood cancer remain largely unknown.Methods: From a cohort of n=149 patients followed in a late...

Background: Nutritional excess of vitamin A, a precursor for retinoic acid (RA), causes premature epiphyseal fusion, craniosynostosis, as well as light-dependent retinopathy. Similarly, homozygous loss-of-function mutations in one of the major RA-metabolizing enzymes CYP26B1 causes advanced bone age, premature epiphyseal fusion, and craniosynostosis. We studied a patient with markedly accelerated skeletal and dental development, retinal scarring, and autism-spectrum disease.</...