ESPE Abstracts

Background: Imprinting disease such as Prader-Willi syndrome (PWS) are associated with pathological sleep due to central and obstructive apneas. No data are available concerning Silver Russell syndrome (SRS) but most patients describe day asthenia and snoring. These patients also often present with maxillo-facial malformations.Aims and objectives: We wanted to characterise sleep in SRS and evaluate GH therapy possible effect on it....

Background and Aim: Pediatric patients with germline mutations in the tumor suppressor gene PTEN (PTEN hamartoma tumor syndrome, PHTS) frequently develop lipomas. PTEN antagonizes phosphoinositide 3-kinase (PI3K) signaling, which can induce adipogenesis upon activation through insulin. The PI3K downstream target AKT can deactivate FOXO1 via phosphorylation, initiating the expression of the lipogenesis activating transcription factor SREBP1. To study t...

Background: Cytochrome C oxidase (COX) is the fourth component of the respiratory chain. This protein is located within the internal membrane of mitochondria. COX deficiency is an inherited mitochondrial disease associated with considerable genetic and clinical variability(1). In fact, four clinical subtypes of this condition have been identified, each one with several phenotypic and genetic variants. Mitochondrial complex IV deficiency nuclear type 4 is a rar...

Background: Glibenclamide has proven to be efficient for patients with neonatal diabetes owing to potassium channel mutations. We developed a suspension of glibenclamide (EMA CHMP Authorization February 2018) fitting recommendations of drug administration to allow a precise dosage. We reported it to be practical, efficient and well tolerated after 3 months of use.Objective: To determine long term efficiency and tolerance of a new suspension of glibenclam...

Background: Molecular defects are rarely detected in Premature ovarian insufficiency (POI) patients.Objective and Hypotheses: We hypothesized that the frequency of causative molecular defects could be higher in cases with early onset of POI. Moreover, the analysis of multiple genes in the same POI group could disclose co-existence of more than one molecular aberration.Method: In 25 subjects, aged 17.1±7 years at POI onset, bid...

Background: Good adherence to recombinant human growth hormone (r-hGH) is crucial to achieve optimal growth outcomes in children with GH deficiency (GHD). Controlling factors that negatively impact adherence is difficult in clinical practice. In order to obtain a better understanding of caregiver behaviour, an Argentinian patient support programme (PSP) implemented TuiTek®, a personalised programme comprising behavioural change training, call guides...

Objective: Cluster analysis of urinary steroid metabolome analysis obtained by gas chromatography-mass spectrometry (GC-MS) for treatment monitoring of infants with classic salt-wasting CAH. Methods: We evaluated metabolome analysis of spot urine samples of 60 young children ≤4 years of age (29 females) with classic CAH due to 21-hydroxylase deficiency treated with hydrocortisone and fludrocortisone. Subjects were divide...

Background: PTEN Hamartoma Tumor Syndrome (PHTS) encompasses different syndromic disorders which are associated with autosomal-dominant mutations of the tumor suppressor gene PTEN. Patients are at high risk to develop benign and malignant tumors. Macrocephaly is a diagnostic feature, but there is a paucity of data on prevalence, degree und development during growth. Charts for length, weight and head circumference for this rare disorder do no...

Background: Controlling therapy of infants, especially from neonates onwards, with classic congenital adrenal hyperplasia (CAH) is challenging due to the lack of reference values.Methods: We retrospectively analyzed 158 spot urinary steroid hormone metabolite profiles determined by gas chromatography–mass spectrometry (GC-MS) of 60 infants aged 0–4.2 years with classic 21-hydroxylase deficiency (21-OHD) on hydr...

The amniotic fluid (AF) milieu is complex and essential to fetal well-being. Here we present a new LC-MS/MS method for the targeted metabolomics analysis of 20 unconjugated and conjugated steroids in 65 AF samples during mid-gestation. Sample preparation included protein precipitation, centrifugation, solid phase extraction and derivatization. We measured progesterone (Prog), 17α-hydroxyprogesterone (17OHProg), testosterone (T), estrone (E1), estradiol (E2), estriol (E3),...