hrp0089s3.1 | Recent consensus guidelines | ESPE2018

Diagnosis and Management of Silver–Russell Syndrome: First International Consensus Statement

Netchine Irene

The first Consensus Statement on Silver Russell Syndrome has been held in 2015, on behalf of the COST Action BM1208 (European Network for Human Congenital Imprinting Disorders, http://www.imprinting-disorders.eu), ESPE, PES, APPES and SLEP with the participation of five representatives from a parent support group from different countries. It has been published in 2016 (ht...

hrp0089p1-p180 | Growth & Syndromes P1 | ESPE2018

Silver Russell and Beckwith-Wiedemann Syndromes: Mosaic Distribution of Epigenetic Anomalies

Pham Aurelie , Giabicani Eloise , Steunou Virginie , Netchine Irene , Brioude Frederic

Background: Genomic imprinting is an epigenetic mechanism referring to the monoallelic silencing of genes according to their parental origin. Human chromosome 11p15.5 encompasses two imprinted domains (ICR1 and ICR2) playing an important role in controlling fetal and postnatal growth. Genetic (uniparental disomy or gain/loss of function mutations) or epigenetic alterations at the 11p15.5 imprinted region (loss or gain of DNA methylation) are associated with two clinical disord...

hrp0086p1-p817 | Syndromes: Mechanisms and Management P1 | ESPE2016

Silver-Russell Syndrome with 11p15 Epimutation: Clinical Analysis of Adrenarche, Central Puberty and Body Mass Index in a Cohort of French Children

Canton Ana , Brioude Frederic , Netchine Irene

Background: Silver-Russell syndrome (SRS) is characterized by intrauterine and postnatal growth retardation, a typical phenotype and feeding difficulties. It is related to 11p15 ICR1 hypomethylation in up to 50% of the cases. Some patients may exhibit signs of early puberty or premature adrenarche, including premature pubarche and/or an exaggerated adrenarche (high dehidroepyandrosterone sulfate (DHEAS) levels for chronological age). Despite early feeding difficulties, some ch...

hrp0086fc6.4 | Syndromes: Mechanisms and Management | ESPE2016

Chromosome 14 Imprinted Region DLK1/GTL2 Disruption: An Alternative Molecular Etiology for Silver-Russell Syndrome

Geoffron Sophie , Habib Walid Abi , Canton Ana , Brioude Frederic , Netchine Irene

Background: Silver-Russell syndrome (SRS) is a clinically and genetically heterogeneous disorder, which remains a clinical diagnosis. The Netchine-Harbison clinical scoring system (NH-CSS), recently adopted by the first international consensus on SRS, defines SRS with at least 4 of the 6 following criteria: born SGA, postnatal growth retardation, relative macrocephaly at birth, prominent forehead, body asymmetry and early feeding difficulties. It is related to 11p15 ICR1 loss ...

hrp0092p1-257 | Pituitary, Neuroendocrinology and Puberty (1) | ESPE2019

Fetal and Post-Natal Growth are Impaired in Children with Deletions of the GH1 Gene: Description of a Cohort of 14 Patients

Darvish Elsa , Legendre Marie , Netchine Irene , Amselem Serge , Brioude Frederic

Data on the birth parameters of patients with growth hormone deficiency are contradictory; recent studies suggest that congenital growth hormone deficiency is associated with impaired fetal growth. The main objective of this study was to describe the birth parameters of children with GH-1 gene deletion.This study included 13 patients (of 10 families) for whom a homozygous (or compound heterozygous) deletion of the entire GH1 gene has been identi...

hrp0089p2-p001 | Adrenals and HPA Axis P2 | ESPE2018

Contribution of Direct Measurements of Steroids by Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS) in Non-classical Adrenal Hyperplasia (NCCAH)

Agnani Helena , Houang Muriel , Egether Thibaut , Netchine Irene , Lamaziere Antonin

Background: To diagnose non classical congenital adrenal hyperplasia (NCCAH) and adrenal insufficiency (AI), current guidelines recommend ACTH test. Cutoffs for 17 hydroxyprogesterone (17OHP) and cortisol are derived from immunoassays values. Thanks to a recently developed and validated mass spectrometry approach (LC-MS/MS) we routinely quantify simultaneously 16 circulating steroids and we are able to speculate on new cut off values and uses.<p class="abs...

hrp0086fc2.1 | Bone &amp; Mineral Metabolism | ESPE2016

Characterization of GNAS miRNAs Targets: Trying to Better Understand the Pathophysiology of Pseudohypoparathyroidism 1B (PHP1B)

Hanna Patrick , Netchine Irene , Le Stunff Catherine , Linglart Agnes

Background: Patients affected with PHP1B are characterized by resistance to PTH which binds to the PTH receptor and activate the cAMP/Gsa signaling pathway. Gsa is encoded by GNAS, a locus subjected to genomic imprinting. PHP1B patients present with abnormal methylation at the maternal A/B promoter and, in some cases, at the other promoters (XLas, GNAS-AS1 and NESP55) of the GNAS locus, likely leading to a decreased express...

hrp0082p1-d2-10 | Adrenals &amp; HP Axis | ESPE2014

An Unusual Presentation of Isolated ACTH-Deficiency Secondary to TBX19 Mutation Revealed by Late Onset Hypoglycemia Seizure

Valentin Cecile , Saveanu Alexandru , Beltrand Jacques , Netchine Irene

Background: Congenital isolated ACTH deficiency (IAD) is a rare inherited disorder that is clinically and genetically heterogeneous. Patients are characterized by low or absent cortisol production secondary to low plasma ACTH despite normal secretion of other pituitary hormones and the absence of structural pituitary defects. Mutations in the TBX19 gene, a T-box factor selectively expressed in developing corticotroph cells, have been identified so far only in cases of neonatal...

hrp0084p2-458 | Growth | ESPE2015

Sleep Apneas in Silver Russell Syndrome: A Constant Finding

Giabicani Eloise , Boule Michele , Galliani Eva , Netchine Irene

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....

hrp0094p1-123 | Growth A | ESPE2021

Growth and nutrition improvement with recombinant growth hormone in prepubertal patients with Silver-Russell syndrome

Villemeur Raphaelle Billette de , Giabicani Eloise , Dubern Beatrice , Netchine Irene ,

Objective: Silver-Russell syndrome (SRS) is an imprinting disorder characterized by severe intrauterine and postnatal growth retardation and feeding difficulties. Patients can benefit from recombinant growth hormone (rGH) therapy which has shown its positive effect on adult height. Our objective was to assess the short-term effects of rGH therapy on growth and nutritional status in prepubertal patients with SRS.Design: Retrospective anal...