ESPE Abstracts

Background: We recently reported three children with severe isolated growth hormone (GH) deficiency and pituitary hypoplasia due to biallelic mutations in the RNPC3 gene, which codes for a minor spliceosome protein required for U11/U12 small nuclear ribonucleoprotein formation and splicing of U12-type introns. Although it is clear that these patients are GH deficient, the underlying mechanism for this deficit is not totally understood.Objective:...

Background: Studies aimed at elucidating the pathophysiology of obesity consistently describe it as a highly heterogeneous disorder at both clinical and molecular level. Despite rare monogenic forms and several regions of susceptibility have been defined, the genetic causes underlying the disease remain largely unknown.Objective and hypotheses: We aimed to identify novel genetic abnormalities in a cohort of Spanish children with severe non-syndromic earl...

Background: Steroidogenic factor-1 (SF-1), denominated as nuclear receptor subfamily five group A member 1 (NR5A1), is an orphan receptor that regulates several steps of adrenal and gonadal development. Mutations in its gene are responsible for different phenotypes of disorders of sex development (DSD).Objective and hypotheses: To study the functional impact of two novel NR5A1 mutations, the p.C247* and p.K396Rfs*34, both identified within the l...

Background: Differential diagnosis between XY partial (PGD) and mixed gonadal dysgenesis (MGD) was initially established by histological evaluation; however, when there is a 45,X lineage there are differences not only in clinical aspects but also in prognosis.Objective and hypotheses: The aim of this work was to analyze clinical picture of patients with genital ambiguity due to testicular dysgenesis, with and without a 45,X lineage, and compare these con...

Background: Although a large number of publications show a high prevalence of Metabolic Syndrome (MS) during childhood, to date, there is no uniform definition for evaluating this condition in children and adolescents. In the pediatric population, there are difficulties for characterizing this condition and the various criteria used might lead to underdiagnosis. In recent years, the triglycerides/HDL (TG/HDL) ratio has been proposed as a new marker.Objec...

Background: Recent data describe that the gonads of patients with partial gonadal dysgenesis (PGD) and mutation in the NR5A1 gene can present with a different histological pattern.Objective and hypotheses: To evaluate histological aspects of PGD caused by NR5A1 mutations.Method: Five patients with PGD, a history of gonadal biopsy or gonadectomy and confirmed mutation on NR5A1 gene were selected from a Bra...

Background: In a Phase 3 trial in participants with obesity due to Bardet-Biedl syndrome (BBS) and Alström syndrome, setmelanotide was associated with significant reduction from baseline in body weight and hunger at Week 52 (primary endpoint), with outcomes driven by responses in individuals with BBS.Methods: In the same trial (NCT03746522), individuals with BBS or Alström syndrome were randomized and received ...

Hypophosphatasia (HPP) is a rare, inherited metabolic disease caused by deficient activity of tissue non-specific alkaline phosphatase (TNSALP). In children, HPP has a heterogeneous clinical presentation, frequently with nonspecific musculoskeletal and systemic manifestations, often leading to misdiagnoses and substantial delays in diagnosis. Data from 323 children with confirmed HPP diagnosis (aged <18 years, ALP activity below the reference range and/or ALPL mut...

Background: The human growth pattern varies from intrauterine to extrauterine life, with the GH-IGF axis being immature at birth and IGF-I assuming an important role in promoting postnatal growth. The actions of IGF-I are modulated by its interactions with IGFBPs, with this interaction being regulated by pappalysins (PAPP-A, PAPP-A2) and stanniocalcins (STC-1, STC-2), and thus modifying the amount of free IGF-I.Objective:</strong...

Case Report: Patient 1: a 3.6-yr-old girl presented with very severe hypertriglyceridemia (serum triglyceride level >1000mg/dL) in random sampling in the first year of life. She presented with recurring episodes of abdominal pain, and splenomegaly. There is no history of consanguineous marriage. Maternal and paternal family had history of coronary events at an early age. A genetic panel showed homozygous variant chr8:19.953.365 C>T (p.Ala162Val) in the l...