ESPE Abstracts

Background: Several genetic defects (GHR, SHOX, GHSR, NPR2, IGFALS) have been reported in children classified as ISS. ISS children are GH sufficient and about one third of them show low IGF-I levels, suggesting some degree of GH insensitivity.Objective: To explore potential genetic defects in ISS children suspicious of GH insensitivity, selected by low IGF-I levels and low response to IGF generation test.<...

Background: Human IGF1 gene defects are characterized by intrauterine and postnatal growth retardation, sensorineural deafness, microcephaly and intellectual disability. Seven cases have been reported so far, and the underlying pathophysiology has been characterized in only three.Objective: To describe a patient with severe short stature presenting a novel homozygous IGF1 gene mutation and its underlying pathogenic mechanism.<p clas...

Background: We have recently reported the molecular diagnosis of two patients with severe growth failure associated with a spectrum of early-onset autoimmune disease and immunodeficiency. Heterozygous de novo mutations, c.1847_1849delAAG (p.E616del) and c.1276T>C (p.C426R), in the STAT3 gene were found. Functional in vitro studies of these variants are presented.Objective and hypotheses: We...

Background: The sonic hedgehog pathway (SHH) regulates CNS development and mutations or abnormal expression of the SHH pathway genes have been identified in epithelial tumors. SHH pathway interacts with Wnt/β-catenin signalling. To date, CTNNB1/β-catenin mutations are the sole molecular abnormality found in adamantinomatous craniopharyngiomas (ACPs).Objective and Hypotheses: To analyze the expression pattern of SHH pathway genes in ACPs and its...

Preterm and low birth weight(LBW) newborns are at risk of thyroid dysfunction during a critical period for neurodevelpment and this dysfunction can be missed in congenital hypothyroidism screening program(CHSP). Consequently, reassessment of thyroid function has been promoted in neonatal units, added to CHSP.Objectives: To evaluate prevalence and risk factors of thyroid dysfunction in≤32weeksGA and/or 1500g newborn, and compare differ...

Introduction: The reported occurrence and management of acute adrenal insufficiency (AI) – related adverse events (AE) vary widely between centres and may depend on available resources.Aim: To use the data within the I-CAH Registry to understand the association between the occurrence and management of AI related AE, their management and the availability of local resources.Methods:</st...

Introduction: Progressive pseudorheumatoid dysplasia (PPRD) is a rare genetic bone disorder characterised by the progressive degeneration of articular cartilage leading to pain, stiffness, joint enlargement and short stature. PPRD occurs due to a mutation in cellular communication network factor 6 (CCN6)/Wnt1-inducible signalling protein 3 (WISP3) gene, encoding a 354 amino acid signalling factor involved in BMP/WNT signalling and mitochondri...

Introduction: The PLIN1 gene encodes perilipin - a lipid droplet coat protein expressed in adipocytes where it inhibits basal and facilitates stimulated lipolysis. Mutations in PLIN1 have been described in several families with partial lipodystrophy, dyslipidemia and insulin resistance (partial lipodystrophy type 4, Familial, FPLD4). Herein we describe a novel heterozygous c.1210-1delG splicing variant in PLIN1 gene in three unrelate...

Objectives: to study the frequency, ultrasound characteristics and the evolution of intrathyroidal ectopia of thymus(IET) in children.Materials and Methods: as part of an epidemiological study (2014-2017), an assessment consists of incidence of IET in pre-puberty children, which using ultrasound of 1164 patients (604 girls, 560 boys). As part of a clinical study (2014-2019), the ultrasound characteristics and the evoluti...

Background: Prader-Willi syndrome (PWS) is a complex, multisystem disorder that arises from lack of expression of paternally imprinted genes on chromosome 15q11-q13. Its major clinical features include neonatal hypotonia, short stature, developmental delay, hyperphagia, childhood onset obesity, hypothalamic endocrinopathy and characteristic appearance. It is known that due to severe obesity PWS patients are prone to develop type 2 diabetes mellitus (T2DM), whi...