hrp0094p1-68 | Diabetes B | ESPE2021

Birth weight and diazoxide unresponsiveness strongly predict the likelihood of congenital hyperinsulinism due to a mutation in ABCC8 or KCNJ11

Hewat Thomas , Yau Daphne , Jerome Joseph , Laver Thomas , Houghton Jayne , Shields Beverley , Flanagan Sarah , Patel Kashyap ,

Background: Hyperinsulinism is characterised by inappropriate insulin secretion during hypoglycaemia. Mutations in the KATP channel genes, ABCC8 and KCNJ11, are the most common cause of persistent congenital hyperinsulinism. The diagnosis of KATP hyperinsulinism is key for the clinical management of the condition.Aim: We aimed to determine the clinical features that help to identify KATP hyperinsulinism...

hrp0094p1-75 | Fetal Endocrinology and Multisystem Disorders A | ESPE2021

Congenital hyperinsulinism diagnosed after 12 months can have a monogenic aetiology

Hopkins Jasmin , Childs Alexandra , Hewat Thomas , Patel Kashyap , Houghton Jayne , Johnson Matthew , Laver Thomas , Flanagan Sarah ,

Background: Congenital hyperinsulinism (HI) is characterised by inappropriate insulin secretion despite low blood glucose which is commonly diagnosed in infancy (before the age of 12 months). Screening of the >20 known genes identifies a mutation in over 45% of cases. The likelihood of identifying a mutation in a known gene in individuals diagnosed after 12 months is not currently known.Aim: We aimed to identify the ...

hrp0094p2-244 | Fetal, neonatal endocrinology and metabolism (to include hypoglycaemia) | ESPE2021

Genetic Testing Access and Results for Patients with Congenital Hyperinsulinism as Conducted through the CHI and University of Exeter Partnership

Pasquini Tai L.S. , Houghton Jayne A.L. , Mesfin Mahlet , Flanagan Sarah E. , Raskin Julie ,

Background and Aims: Congenital hyperinsulinism (HI) is the most frequent cause of severe, persistent hypoglycemia in newborn babies and children. The disease may occur in isolation or can present as part of a syndrome. Routine screening of the known etiological genes (n = >20) identifies a disease-causing mutation in 40-50% of all cases. An accurate and timely genetic diagnosis is clinically important for all individuals as understanding the unde...

hrp0092rfc9.4 | Fetal, Neonatal Endocrinology and Metabolism (to include Hypoglycaemia) | ESPE2019

Correlation Between Genotype and Phenotype Characteristics in Children with Congenital Hyperinsulinism (CHI) in a Specialist Centre

Bosch Laura , Kallefullah Mohammad Jasmina , Dastamani Antonia , Gilbert Clare , Morgan Kate , Houghton Jayne , Ellard Sian , Flanagan Sarah , Shah Pratik

Introduction and Aim: Congenital hyperinsulinism (CHI) is the most common cause of hypoglycaemia in early infancy and represents a heterogeneous disorder with respect to clinical presentation, histology and genetics. The aim of our study is to review correlation between genotype and phenotypic characteristics of children with CHI.Methods: Retrospective review of CHI patients with positive genetics during the last 8 years...

hrp0092rfc9.5 | Fetal, Neonatal Endocrinology and Metabolism (to include Hypoglycaemia) | ESPE2019

Spectrum of Neuro-Developmental Disorders in Children with Congenital Hyperinsulinism Due to Activating Mutations in GLUD1

Aftab Sommayya , Gubaeva Diliara , Dastamani Antonia , Sotiridou Ellada , Gilbert Clare , Houghton Jayne , Flanagan Sarah E. , Melikyan Maria , Shah Pratik

Background & Objective: Hyperinsulinism-Hyperammonaemia (HI/HA) syndrome is the second most common type of congenital hyperinsulinism (CHI) in outbred populations. HI/HA is caused by an activating mutation in the GLUD1 gene which encodes the intra-mitochondrial enzyme glutamate dehydrogenase (GDH).The aim of this study was to determine the clinical presentation, treatment and risk factors of neuro-developmental disorders in ...

hrp0089p3-p173 | Fetal, Neonatal Endocrinology and Metabolism P3 | ESPE2018

Outcome of Eight Patients with Congenital Hyperinsulinism (CHI) Studied with 18[F]Dihydroxyphenyl-Alanine Positron Emission Tomography Imaging (18F-DOPA-PET-CT) in Argentina

Tangari Saredo Ana , Flanagan Sarah , Alonso Guillermo , Caceres Juan , Troiano Marina , Bignon Horacio , Bastianello Maria , Graciela Del Rey , Ignacio Bergada

Congenital hyperinsulinism (CHI) results from inappropriate insulin secretion most commonly caused by mutations in the ABCC8 and KCNJ11 genes which encode for the pancreatic β-cells-ATP-sensitive-potassium channel (KATP) subunits SUR1 and KIR6.2 respectively. Diagnosis of CHI is based on the presence of detectable plasma insulin during hypoglycemia, suppressed β-hydroxybutyrate and NEFA. Diazoxide is the major treatment for CHI, sirolimus had also b...

hrp0086p1-p204 | Diabetes P1 | ESPE2016

A Syndrome of Permanent Neonatal Diabetes Mellitus and Neurological Abnormalities due to a Novel Homozygous Missense c.449T>A (p.I150N) Mutation in NEUROD1 Gene

Hatipoglu Nihal , Demirbilek Huseyin , Gul Ulku , Tatli Zeynep Uzan , Flanagan Sarah , Ellard Sian , De Franco Elisa , Kurtoglu Selim

Neonatal diabetes mellitus (NDM) is a rare form of monogenic diabetes presenting in the first 6 months of life. NEUROD1 is a transcriptional factor involved in the development of endocrine pancreas. A few patients with maturity onset diabetes of the young (MODY) due to heterozygous NEUROD1 mutations and only two cases with permanent NDM (PNDM) associated to neurological disorders and cerebellar hypoplasia due to homozygous mutations in the NEUROD1 gene have been reported.<...

hrp0086p1-p554 | Perinatal Endocrinology P1 | ESPE2016

Clinical and Molecular Characteristics of Turkish Patients with Congenital Hyperinsulinism: A Single-Center Experience

Yildiz Melek , Akcay Teoman , Mutlu Neval , Akgun Abdurrahman , Onal Hasan , Ulucan Korkut , Ellard Sian , Flanagan Sarah E.

Background: Congenital hyperinsulinism (HI) is the most common cause of persistent hypoglycemia which needs a prompt diagnosis and relevant treatment to avoid brain damage. So far, mutations in 11 key genes are known to cause monogenic forms of HI.Objective and hypotheses: The aim of this study was to characterize the clinical and molecular features of Turkish congenital HI patients and analyze the genotype/phenotype correlations.M...

hrp0086p1-p560 | Perinatal Endocrinology P1 | ESPE2016

Congenital Hyperinsulinism Due to Compound Heterozygous Mutation in ABCC8 and KCNJ11 GENES: 20 Years Experience of A National Referral Centre

Walton-Betancourth Sandra , Shah Pratik , Flanagan Sarah , Ellard Sian , Guemes Maria , Gilbert Clare , Silvera Shavel , Hussain Khalid

Background: Congenital hyperinsulinism (CHI) is a condition caused by dysregulated insulin secretion. Compound heterozygous mutations in ABCC8 or KCNJ11 genes account for approximately 13% of CHI mutations and have traditionally been associated with diffuse disease unresponsive to diazoxide.Objective and hypotheses: To analyse the clinical presentation and response to treatment of patients diagnosed with CHI due to compound heterozygous...

hrp0086p2-p584 | Perinatal Endocrinology P2 | ESPE2016

A Unique IL2RA Mutation Presenting as Neonatal Diabetes, Congenital Hypothyroidism and Sepsis

Sri Nagesh V. , Hattersley Andrew , Ellard Sian , De Franco Elisa , Flanagan Sarah , Naseem Altaf , Ahmed A. , Ahmed Tanveer , Venkateswarlu K.

Background: 16 year old female neonate presented with neonatal diabetes, congenital hypothyroidism and sepsis.Objective and hypotheses: To evaluate the neonate for a common cause of neonatal diabetes, congenital hypothyroidism and sepsis and to explore for the best modality of management, including a possible role for sulphonylureas.Method: The neonate born of 3rd degree consanguinity was admitted and started on insulin infusion an...