ESPE Abstracts

Background: Steroidogenic factor 1 (SF1), encoded by the gene NR5A1, is a member of the orphan nuclear receptor superfamily and important regulator of gonadal and adrenal function. Variations in SF1 lead to a spectrum of conditions including 46,XY DSD, hypospadias, adrenal insufficiency, male factor infertility, and primary ovarian insufficiency. Inheritance patterns can be complicated (e.g. de novo dominant, sex-limited dominant, and autosomal recessive). In...

Background: Diabetes mellitus is a heterogeneous disorder with multiple aetiologies. Monogenic diabetes accounts for an estimated 2–5% of cases and is often associated with impaired pancreas development and β-cell dysfunction. Heterozygous mutations in the transcription factor, HNF1B, result in multi-system disease including diabetes due to β-cell dysfunction, hepatic insulin resistance and pancreatic hypoplasia. However, the mechanisms that underlie development...

Background: Collaborative project to review the phenotypic and genotypic data from children recruited to the UK wide deciphering developmental disorders (DDD) study.Objective and hypotheses: To report the frequency and range of disorders of sex development (DSD) phenotypes observed in DDD participants who have one or more associated ‘neurodevelopmental delay’ diagnostic human phenotype ontology (HPO) term.Method: Retrospe...

Background: The phosphatase and tensin homolog (PTEN)/phosphatidylinositol-3-kinase (PI3K)/AKT signaling pathway is central for cell cycle control, differentiation, migration, and metabolism. Unrestricted growth of adipose tissue in particular is frequently seen in humans with germline PTEN and mosaic activating PIK3CA mutations, respectively.Objective and hypotheses: We assume that adipocytes from affected tissue show hyperproliferation and modified dif...

Background: Hypospadias is a common characteristic of Disorders of Sex Development (DSD). At the present time a molecular diagnosis is not reached in over 50% of cases. The DDD Study represents a useful resource of large molecular and phenotypic datasets obtained from individuals with an undiagnosed developmental abnormality including DSD.Objective: To review associated features and identify likely pathogenic variants in previously undiagnosed DDD partic...

Background: Congenital hyperinsulinism is genetic disorder characterized by dysregulation of insulin secretion and it is the most common cause of persistent hypoglycaemia in infancy. The incidence in individuals of northern European extraction is approximately 1:30,000 live births. Published data on the diagnosis and management of congenital hyperinsulinsim in resource limited setting is scarce.Objective and hypotheses: To describe the clinical presentat...

The structure and design of the ESPE web portal (www.espe-elearning.org) is based on facilitating Problem-Based Learning (PBL). It consists of carefully designed problems that challenge medical students, residents, postdoc’s to use problem solving techniques, self-directed learning strategies and specialty knowledge.The ESPE e-learning web portal is an interactive learning environment for up to date topics in pediatric endocrinology and diabetes co...

Effective management of Type 1 diabetes can be challenging. We would like to discuss the management of a 7 year old boy with Type 1 Diabetes, Lissencephaly and global severe developmental delay with medically refractory epilepsy who was introduced to and managed on a Ketogenic diet to try and improve his seizure control. He is non mobile and non-verbal and purely gastrostomy fed. He has diagnoses including. Lissencephaly and band heterotopia, absent corpus callosum, microcepha...

Background: Bisphenol A (BPA), a ubiquitous endocrine-disrupting chemical, has been shown to exert transgenerational effects on adiposity, metabolism, and reproductive outcomes in rodents, indicating epigenetic inheritance. Recent studies of other environmental insults (stress and high-fat diet) have demonstrated a mechanistic role for spermatozoal microRNAs in the transgenerational transmission of acquired paternal traits.Objective and hypotheses: To as...

Background: The process of sexual differentiation is central for reproduction of almost all metazoan. Recently, we identified CBX2.1 a chromatin architecture regulator, as an essential transactivator for human male gonadal development. CBX2 has a second isoform CBX2.2. Since nothing is known about the role of CBX2.2 in human sex development, we took advantage of the p.C132R mutation in CBX2.2 in a 46,XY disorder of sex development (DSD) patient with complete female phenotype a...