ESPE Abstracts

IMNEPD is a mitochondrial disease caused by homozygous mutations in the PTRH2 gene, a nuclear gene coding for a primary mitochondrial protein. IMNEPD was first described in 2014. So far only 3 other case reports have been published, reporting on a total of 15 patients. We report on two affected siblings of whom the girl developed an antibody negative diabetes at 13 years of age with typical symptoms (polyuria, polydipsia, weight loss of 1,5 kg), and without diabetic k...

Treating short stature in children born small for gestational age (SGA) requires daily growth hormone (GH) injections that are burdensome for patients and caregivers. Results from REAL5 (ongoing randomised, multinational, open-label, controlled, dose-finding phase 2 trial; NCT03878446) indicate that somapacitan (0.24 mg/kg/week) has an efficacy, safety, and tolerability profile similar to daily GH (0.067 mg/kg/day) after 52 weeks of treatment in children born SGA. Predicting G...

Steroidogenic enzyme expression in the fetal adrenal and the placenta hints at the production and metabolism of adrenal-derived 11-oxy androgens (11OxyAs) in the fetal-placental unit. Thus, 11OxyAs are present in placental tissue, fetal cord blood and neonatal serum, and could have a particular role during fetal development. The metabolism of the 11OxyAs in the fetal unit, therefore, presents as a focal point of investigation. Adrenal androgens are primarily metabolized by the...

Background: In the vast majority of cases, achondroplasia and hypochondroplasia are attributable to hotspot missense mutations in the FGFR3 gene. 96% of patients have a G(1138)A and 3% have a G(1138)C point mutation. We report on a family whose members have a deep intronic mutation that leads to a novel cryptic splicing variant of the FGFR3 gene, and via this pathway results in new pathogenicity manifesting as achondroplasia.Case...

Background: Timing of puberty is associated with height, cardiovascular health and cancer risk, with a significant public health impact. Previous studies estimate that 60–80% of variation in the timing of pubertal onset is genetically determined. Self-limited delayed puberty (DP) often segregates in an autosomal dominant pattern, but the underlying genetic background is unknown.Methods: We performed whole exome sequencing in 52 members of 7 families...

Objective: KIGS (Pfizer International Growth Survey) was a large, international database of pediatric patients who received recombinant human growth hormone (rhGH) as prescribed in real-world clinical settings. This analysis evaluated the long-term safety and efficacy data from all participants until KIGS close in 2012.Methods: Children with growth disorders and treated with rhGH (Genotropin® [somatropin]...

Recently, we identified Neuritin 1 (NRN1) as preferentially expressed in human white compared to brown adipocyte progenitor cells. In mice, Nrn1 deficiency leads to a reduction in body weight, indicating that it might regulate body weight. In this study, we aim to address the function of NRN1 regarding adipocyte metabolism in vitro and in vivo. We used human SGBS preadipocytes as an in vitro model system. NRN1-deficient cells were generated using len...

Daily injections are required for human growth hormone (GH) replacement therapy. Somapacitan is a long-acting GH derivative being developed for once-weekly dosing in adults and children using a proven protraction method, currently successfully in use to extend the half-life of insulin and glucagon-like peptide 1.To evaluate the efficacy and safety of three different once-weekly somapacitan doses compared with Norditropin®, a daily GH, ove...

Background: Self-limited delayed puberty (DP) is an extreme variant of normal pubertal timing and it often clusters in families. Although it is highly heritable and is the most common cause of delayed puberty, little is known about the genetic control. GnRH neuronal biology has been implicated as a key element in the pathogenesis of DP. By focusing on genes involved in GnRH neuron development, migration and function we may understand more about the genetic bas...

Introduction: Hypophosphatasia (HPP) is a congenital disorder of the bone and mineral metabolism. It is based on mutations in the ALPL gene, which codes for tissue-unspecific alkaline phosphatase (TNSAP). Methods:The casuistic of 3 children with heterozygous ALPL mutation are presented. The patients were identified by laboratory data screening for reduced AP activity at the Children's Hospital of the University Hospital Freiburg....