ESPE Yearbook of Paediatric Endocrinology

Brief Summary: This prospective cohort study measured day 3 serum calcium and 25OH vitamin D (25OHD) in 1002 mother-newborn pairs to establish reference ranges in vitamin D replete babies.Calcium declines in the first days of life and is frequently measured in the neonatal nursery, not only for symptomatic newborns but also for conditions such as prematurity, low birth weight or maternal diabetes mellitus. French guidelines recommend an oral bolus of Vit...

Brief summary: This is the first multi-national phase 2 dose finding trial aimed at investigating efficacy and safety of the long acting GH (Somapacitan) with daily GH in short children born SGA. 62 GH treatment-naïve short children born SGA were enrolled in the study. Efficacy was valuated with estimated mean annualized height velocity (HV) after 26 weeks of follow-up. Somapacitan showed similar efficacy of daily rhGH. The study will be extended for further 4 years in or...

In Brief: Clinical symptoms of Pseudohypoparathyroidism (PHP) and related disorders present during late childhood and adulthood. This study found that newborns with this group of conditions require specific care at birth due to increased risk of neonatal complications.Commentary: Pseudohypoparathyroidism (PHP) and related disorders, newly referred to as inactivating PTH/PTHrP signalling disorders (iPPSD), are rare endocrine diseases. Their many clinical ...

In Brief: Hypophosphatasia is a clinically heterogenous disorder. By analysing observational data on 215 children (54.4% girls) with hypophosphatasia from the Global Hypophosphatasia Registry, the authors found growth impairment in patients aged <2 years. However, short stature was not a characteristic feature of children with hypophosphatasia, and height was not correlated with disease severity.Commentary: Hypophosphatasia is an inborn error of meta...

In brief: This article describes the functionalities of the Global ALPL gene variant classification project, which aims to reclassify variants of uncertain significance (VUS) in the ALPL gene and to continuously assess and update genetic, phenotypic, and functional variant information in hypophosphatasia.Commentary: Hypophosphatasia (HPP) is a rare genetic disorder caused by loss-of-function mutations in the alkaline phosphatase ( A...

To read the full abstract: N Engl J Med 2018;378:1987-1998FGF-23 is the primary regulator of phosphate homeostasis and acts by inhibiting phosphate reabsorption in the kidney (1). Loss-of-function mutations in the gene encoding phosphate-regulating endopeptidase homolog X-linked (PHEX) results in excess circulating FGF-23, which impairs renal phosphate reabsorption causing hypophosphatemia...

In brief: This observational analysis, based on data from the Global Hypophosphatasia Registry, reports the clinical profiles, prior to initiation of asfotase alfa enzyme replacement therapy, in a large cohort of children with hypophosphatasia (n=151), by age (<6 months vs 6 months to 18 years) and geographic region (USA/Canada, Europe, and Japan).Commentary: Hypophosphatasia (HPP) is a rare genetic disorder caused by loss-of-function mutations in th...

Science Advances, 2021,7:eabj5018 doi: 10.1126/sciadv.abj5018Brief Summary: The authors developed a liver-targeting adeno-associated virus (AAV) vector carrying C-terminal FGF23 (cFGF23) to inhibit FGF23 signalling in a mouse model for X-linked hypophosphataemic rickets (hyp-duk mice). They were able to show that a single injection of AAV cFGF23 rescued the hyp-duk phenotype.<p class="abst...

Nat Rev Nephrol. 2019 May 8. doi: 10.1038/s41581-019-0152-5. [PMID: 31068690].Abstract: www.ncbi.nlm.nih.gov/pubmed/?termZ31068690In brief: In this Evidence-Based Guideline on X-linked hypophosphataemia, the authors identify the criteria for diagnosis of this disease, provide guidance for medi...

In Brief: This is a timely and well-written review on disorders of biomineralization and their fundamental mechanisms and by leading experts in the field. This is mandatory reading for any aspiring endocrinologist.Commentary: Biomineralization is a critical physiological process, and deviations from it can cause various diseases. Recent progress has furthered our understanding of the genetic, molecular, and cellular underpinnings of the disorders of biom...