ESPE Abstracts

Introduction: Hypophosphatasia (HPP) is caused by inactivating mutation(s) within the gene for tissue nonspecific alkaline phosphatase (TNSALP). Patients with the perinatal and infantile forms of HPP suffer rickets, poor growth, and delayed gross motor function. In 2012, we detailed significant improvement in skeletal mineralization and respiratory function in such patients treated for 1 year with asfotase alfa, a bone-targeted recombinant human TNSALP,1 and recentl...

Background: Patients affected by pseudohypoparathyroidism type 1b (PHPI-b) develop resistance to PTH leading to hypocalcemia and hyperphosphoremia, which is often associated with resistance to TSH. PHP-Ib is associated with methylation changes at one or several differentially methylated regions (DMRs) within the GNAS complex locus, located at 20q13.2–13.3. This locus gives rise to several different transcripts (NESP55, XL, A/B), with varying patterns of imprinted expressi...

Background: In-vivo skeletal MRI imaging remains challenging due to the extremely short MR relaxation times (<1 ms) of protons bound to water in bone. However, each MRI sequence contains properties identifiable through feature-based recognition, highlighting characteristics relating to skeletal configuration. We thus present a novel statistical method for clinical 1.5 Tesla (T) MRI in quantifying trabecular microstructure and use HRpQCT to determine its accuracy.<...

Background: Growth charts constitute an important tool to monitor a child’s growth and development, and thus detect growth anomalies. Growth assessment allows early referral and management of treatable disorders. In France, the currently used growth reference charts were derived at the end of 1970s, based on children born on 1950s in Paris area. Questions are raised about their use for growth monitoring of more recently born children.Objectives: To ...

Background: Over-dosing and under-dosing of vitamin D in children and young people appears to be common, based on our audit of current practice. The contribution of ethnicity, skin colour, and vitamin D binding protein (VDBP) genotype has not been fully explored during vitamin D treatment.Objective: To investigate how ethnicity/skin colour and genetic variation affect the response to 150 000 units of vitamin D administered to young adults of White Caucas...

Objectives: Somatrogon is a long-acting recombinant human growth hormone (GH) approved in the EU and other countries for once-weekly treatment of pediatric patients with GH deficiency (GHD). In this analysis, height outcomes of somatrogon-treated patients in a phase 3 trial (CP-4-006) were compared with historical data from matched somatropin-treated patients enrolled in KIGS.Methods: In trial CP-4-006, patients were ran...

Introduction: Children with congenital adrenal hyperplasia (CAH) and adrenal insufficiency (AI) rely on lifelong hormone replacement with hydrocortisone (HC). Alkindi® is the first HC licensed for children from birth to 18 years with AI, available in small doses of 0.5, 1, 2 and 5mg required for the needs of neonates, infants and children.Objectives: Primary: long-term safety of Alkindi®; Secondary: long-term d...

Introduction: Worldwide the Short Synacthen Test (SST) is the most popular diagnostic investigation for adrenal insufficiency (AI) amongst both paediatric and adult endocrinologists. Cannulation and blood sampling are required making it invasive, time-consuming and resource-intensive. We have previously validated a reliably absorbed and well tolerated formulation of nasal synacthen (Nasacthin003) in healthy adult males, measuring the glucocorticoid response in salivary cortiso...

Background: Fetal skeletal bone development and mineralisation depends on placental calcium transfer. Although Parathyroid Hormone (PTH) pathway has some contribution, TRPV6 (the sixth member of the Transient Receptor Potential Vanilloid family) is a recently identified receptor involved in calcium transport and is predominantly expressed in the placenta. It has not previously been linked with skeletal development disorders.Case: This infant had...

Background: Serum dihydrotestosterone (DHT) is an important analyte for the clinical assessment of disorders of sex development. It is also reportedly a difficult analyte to measure. Currently there are significant gaps in the standardisation of this analyte, including no external quality assurance (EQA) program available worldwide to allow for peer performance review of DHT.Objective and hypotheses: We therefore proposed to establish an EQA program for ...