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Marie Lindhardt Ljubicic Department of Growth and Reproduction, Copenhagen University Hospital – Rigshospitalet, Copenhagen, Denmark
International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

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Trine Holm Johannsen Department of Growth and Reproduction, Copenhagen University Hospital – Rigshospitalet, Copenhagen, Denmark
International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

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Margit Bistrup Fischer Department of Growth and Reproduction, Copenhagen University Hospital – Rigshospitalet, Copenhagen, Denmark
International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

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Emmie N Upners Department of Growth and Reproduction, Copenhagen University Hospital – Rigshospitalet, Copenhagen, Denmark
International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

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Alexander S Busch Department of Growth and Reproduction, Copenhagen University Hospital – Rigshospitalet, Copenhagen, Denmark
International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

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Katharina M Main Department of Growth and Reproduction, Copenhagen University Hospital – Rigshospitalet, Copenhagen, Denmark
International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark

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Anna-Maria Andersson Department of Growth and Reproduction, Copenhagen University Hospital – Rigshospitalet, Copenhagen, Denmark
International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

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Casper P Hagen Department of Growth and Reproduction, Copenhagen University Hospital – Rigshospitalet, Copenhagen, Denmark
International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

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Anders Juul Department of Growth and Reproduction, Copenhagen University Hospital – Rigshospitalet, Copenhagen, Denmark
International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark

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The ratio between luteinizing hormone (LH) and follicle-stimulating hormone (FSH) has previously been described as an excellent marker of sex in healthy infants. However, LH/FSH remains not fully described in patients with differences of sex development (DSD). The aim was therefore to describe LH/FSH in infants with DSD. This was a retrospective study of DSD patients, all aged 0–1.2 years. In total, 87 infants with DSD and at least one serum sample per infant were included. Longitudinal samples from single patients were included whenever possible. Serum LH/FSH ratios in these patients were plotted against recently published age-related and sex-dimorphic cutoffs. Overall, LH/FSH sometimes corresponded to assigned sex without any obvious pattern in terms of diagnoses. LH/FSH corresponded to the biological sex in all patients with Turner or Klinefelter syndrome. In patients with 46,XX or 46,XY DSD (except congenital adrenal hyperplasia (CAH)), the ratios did not correspond to the assigned sex in all cases and were interchangeably within the male and female range. In patients with CAH, the ratio corresponded to biological sex (based on sex chromosomes) in some cases but also ranged across the cutoffs. In the 15 patients with 45,X/46,XY mosaicism, the LH/FSH ratios corresponded to the assigned sex in all cases (12 were raised as males, 3 as females) and at all time points in cases with multiple sampling. While this study describes LH/FSH in infants with DSD, the exact clinical role of the ratio in the management of these patients remains to be further elucidated.

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Nathalia G B P Ferreira Unidade de Endocrinologia do Desenvolvimento, Laboratório de Hormônios e Genética Molecular LIM42, Disciplina de Endocrinologia, Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, Brazil

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Joao L O Madeira Unidade de Endocrinologia do Desenvolvimento, Laboratório de Hormônios e Genética Molecular LIM42, Disciplina de Endocrinologia, Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, Brazil

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Peter Gergics Laboratório de Sequenciamento em Larga Escala (SELA), Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo, Brazil

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Renata Kertsz Unidade de Endocrinologia do Desenvolvimento, Laboratório de Hormônios e Genética Molecular LIM42, Disciplina de Endocrinologia, Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, Brazil

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Juliana M Marques Unidade de Endocrinologia do Desenvolvimento, Laboratório de Hormônios e Genética Molecular LIM42, Disciplina de Endocrinologia, Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, Brazil

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Nicholas S S Trigueiro Unidade de Endocrinologia do Desenvolvimento, Laboratório de Hormônios e Genética Molecular LIM42, Disciplina de Endocrinologia, Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, Brazil

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Anna Flavia Figueredo Benedetti University of Michigan Medical School, Department of Human Genetics, Ann Arbor, Michigan, United States

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Bruna V Azevedo Unidade de Endocrinologia do Desenvolvimento, Laboratório de Hormônios e Genética Molecular LIM42, Disciplina de Endocrinologia, Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, Brazil

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Bianca H V Fernandes Unidade de Endocrinologia do Desenvolvimento, Laboratório de Hormônios e Genética Molecular LIM42, Disciplina de Endocrinologia, Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, Brazil
Universidade de São Paulo, Zebrafish Facility, São Paulo, São Paulo, Brazil

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Debora D Bissegatto Unidade de Endocrinologia do Desenvolvimento, Laboratório de Hormônios e Genética Molecular LIM42, Disciplina de Endocrinologia, Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, Brazil

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Isabela P Biscotto Unidade de Endocrinologia do Desenvolvimento, Laboratório de Hormônios e Genética Molecular LIM42, Disciplina de Endocrinologia, Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, Brazil

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Qing Fang Laboratório de Sequenciamento em Larga Escala (SELA), Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo, Brazil

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Qianyi Ma Laboratório de Sequenciamento em Larga Escala (SELA), Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo, Brazil

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Asye B Ozel Laboratório de Sequenciamento em Larga Escala (SELA), Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo, Brazil

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Jun Li Laboratório de Sequenciamento em Larga Escala (SELA), Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo, Brazil

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Sally A Camper Laboratório de Sequenciamento em Larga Escala (SELA), Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo, Brazil

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Alexander A L Jorge Unidade de Endocrinologia Genética, Laboratório de Endocrinologia Celular e Molecular LIM25, Disciplina de Endocrinologia da Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil

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Berenice B Mendonça Unidade de Endocrinologia do Desenvolvimento, Laboratório de Hormônios e Genética Molecular LIM42, Disciplina de Endocrinologia, Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, Brazil

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Ivo J P Arnhold Unidade de Endocrinologia do Desenvolvimento, Laboratório de Hormônios e Genética Molecular LIM42, Disciplina de Endocrinologia, Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, Brazil

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Luciani R Carvalho Unidade de Endocrinologia do Desenvolvimento, Laboratório de Hormônios e Genética Molecular LIM42, Disciplina de Endocrinologia, Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, Brazil

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Context

Congenital hypopituitarism is a genetically heterogeneous condition. Whole exome sequencing (WES) is a promising approach for molecular diagnosis of patients with this condition.

Objectives

The aim of this study is to conduct WES in a patient with congenital hypopituitarism born to consanguineous parents, CDH2 screening in a cohort of patients with congenital hypopituitarism, and functional testing of a novel CDH2 variant.

Design

Genomic DNA from a proband and her consanguineous parents was analyzed by WES. Copy number variants were evaluated. The genetic variants were filtered for population frequency (ExAC, 1000 genomes, gnomAD, and ABraOM), in silico prediction of pathogenicity, and gene expression in the pituitary and/or hypothalamus. Genomic DNA from 145 patients was screened for CDH2 by Sanger sequencing.

Results

One female patient with deficiencies in growth hormone, thyroid-stimulating hormone, adrenocorticotropic hormone, luteinizing hormone, and follicle-stimulating hormone and ectopic posterior pituitary gland contained a rare homozygous c.865G>A (p.Val289Ile) variant in CDH2. To determine whether the p.Val289Ile variant in CDH2 affects cell adhesion properties, we stably transfected L1 fibroblast lines, labeled the cells with lipophilic dyes, and quantified aggregation. Large aggregates formed in cells expressing wildtype CDH2, but aggregation was impaired in cells transfected with variant CDH2 or non-transfected.

Conclusion

A homozygous CDH2 allelic variant was found in one hypopituitarism patient, and the variant impaired cell aggregation function in vitro. No disease-causing variants were found in 145 other patients screened for CDH2 variants. Thus, CDH2 is a candidate gene for hypopituitarism that needs to be tested in different populations.

Significance statement

A female patient with hypopituitarism was born from consanguineous parents and had a homozygous, likely pathogenic, CDH2 variant that impairs cell aggregation in vitro. No other likely pathogenic variants in CDH2 were identified in 145 hypopituitarism patients.

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Lukas Plachy Department of Pediatrics, 2nd Faculty of Medicine, Charles University in Prague and University Hospital Motol, Prague, Czech Republic

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Lenka Petruzelkova Department of Pediatrics, 2nd Faculty of Medicine, Charles University in Prague and University Hospital Motol, Prague, Czech Republic

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Petra Dusatkova Department of Pediatrics, 2nd Faculty of Medicine, Charles University in Prague and University Hospital Motol, Prague, Czech Republic

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Klara Maratova Department of Pediatrics, 2nd Faculty of Medicine, Charles University in Prague and University Hospital Motol, Prague, Czech Republic

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Dana Zemkova Department of Pediatrics, 2nd Faculty of Medicine, Charles University in Prague and University Hospital Motol, Prague, Czech Republic

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Lenka Elblova Department of Pediatrics, 2nd Faculty of Medicine, Charles University in Prague and University Hospital Motol, Prague, Czech Republic

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Vit Neuman Department of Pediatrics, 2nd Faculty of Medicine, Charles University in Prague and University Hospital Motol, Prague, Czech Republic

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Stanislava Kolouskova Department of Pediatrics, 2nd Faculty of Medicine, Charles University in Prague and University Hospital Motol, Prague, Czech Republic

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Barbora Obermannova Department of Pediatrics, 2nd Faculty of Medicine, Charles University in Prague and University Hospital Motol, Prague, Czech Republic

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Marta Snajderova Department of Pediatrics, 2nd Faculty of Medicine, Charles University in Prague and University Hospital Motol, Prague, Czech Republic

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Zdenek Sumnik Department of Pediatrics, 2nd Faculty of Medicine, Charles University in Prague and University Hospital Motol, Prague, Czech Republic

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Jan Lebl Department of Pediatrics, 2nd Faculty of Medicine, Charles University in Prague and University Hospital Motol, Prague, Czech Republic

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Stepanka Pruhova Department of Pediatrics, 2nd Faculty of Medicine, Charles University in Prague and University Hospital Motol, Prague, Czech Republic

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Familial short stature (FSS) describes vertically transmitted growth disorders. Traditionally, polygenic inheritance is presumed, but monogenic inheritance seems to occur more frequently than expected. Clinical predictors of monogenic FSS have not been elucidated. The aim of the study was to identify the monogenic etiology and its clinical predictors in FSS children. Of 747 patients treated with growth hormone (GH) in our center, 95 with FSS met the inclusion criteria (pretreatment height ≤−2 SD in child and his/her shorter parent); secondary short stature and Turner/Prader–Willi syndrome were excluded criteria. Genetic etiology was known in 11/95 children before the study, remaining 84 were examined by next-generation sequencing. The results were evaluated by American College of Medical Genetics and Genomics (ACMG) guidelines. Nonparametric tests evaluated differences between monogenic and non-monogenic FSS, an ROC curve estimated quantitative cutoffs for the predictors. Monogenic FSS was confirmed in 36/95 (38%) children. Of these, 29 (81%) carried a causative genetic variant affecting the growth plate, 4 (11%) a variant affecting GH–insulin-like growth factor 1 (IGF1) axis and 3 (8%) a variant in miscellaneous genes. Lower shorter parent’s height (P = 0.015) and less delayed bone age (BA) before GH treatment (P = 0.026) predicted monogenic FSS. In children with BA delayed less than 0.4 years and with shorter parent’s heights ≤−2.4 SD, monogenic FSS was revealed in 13/16 (81%) cases. To conclude, in FSS children treated with GH, a monogenic etiology is frequent, and gene variants affecting the growth plate are the most common. Shorter parent’s height and BA are clinical predictors of monogenic FSS.

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Rebeca Esquivel-Zuniga Department of Pediatrics, University of Virginia, Charlottesville, Virginia, USA

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Alan D Rogol Department of Pediatrics, University of Virginia, Charlottesville, Virginia, USA

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Hypogonadism is a clinical syndrome resulting from failure to produce physiological concentrations of sex steroid hormones with accompanying symptoms, such as slowed growth and delayed pubertal maturation. Hypogonadism may arise from gonadal disease (primary hypogonadism), dysfunction of the hypothalamic–pituitary axis (secondary hypogonadism) or functional hypogonadism. Disrupted puberty (delayed or absent) leading to hypogonadism can have a significant impact on both the physical and psychosocial well-being of adolescents with lasting effects. The diagnosis of hypogonadism in teenagers can be challenging as the most common cause of delayed puberty in both sexes is self-limited, also known as constitutional delay of growth and puberty (CDGP). Although an underlying congenital cause should always be considered in a teenager with hypogonadism, acquired conditions such as obesity, diabetes mellitus, other chronic diseases and medications have all been associated with low sex steroid hormone levels. In this review, we highlight some forms of functional hypogonadism in adolescents and the clinical challenges to differentiate normal variants from pathological states.

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Danielle Christine Maria van der Kaay Erasmus University Medical Center, Department of Pediatrics, Subdivision of Endocrinology, Rotterdam, Netherlands

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Anne Rochtus Department of Pediatric Endocrinology, University Hospitals Leuven, Leuven, Belgium

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Gerhard Binder University Children’s Hospital, Pediatric Endocrinology, University of Tübingen, Tübingen, Germany

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Ingo Kurth Institute of Human Genetics, Medical Faculty, RWTH Aachen University, Aachen, Germany

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Dirk Prawitt Center for Paediatrics and Adolescent Medicine, University Medical Center, Mainz, Germany

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Irène Netchine Sorbonne Université, Centre de Recherche Saint-Antoine, INSERM, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France

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Gudmundur Johannsson Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
Department of Endocrinology at Sahlgrenska University Hospital, Gothenburg, Sweden

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Anita C S Hokken-Koelega Erasmus University Medical Center, Department of Pediatrics, Subdivision of Endocrinology, Rotterdam, Netherlands

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Miriam Elbracht Institute of Human Genetics, Medical Faculty, RWTH Aachen University, Aachen, Germany

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Thomas Eggermann Institute of Human Genetics, Medical Faculty, RWTH Aachen University, Aachen, Germany

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The implementation of high-throughput and deep sequencing methods in routine genetic diagnostics has significantly improved the diagnostic yield in patient cohorts with growth disturbances and becomes increasingly important as the prerequisite of personalized medicine. They provide considerable chances to identify even rare and unexpected situations; nevertheless, we must be aware of their limitations. A simple genetic test in the beginning of a testing cascade might also help to identify the genetic cause of specific growth disorders. However, the clinical picture of genetically caused growth disturbance phenotypes can vary widely, and there is a broad clinical overlap between different growth disturbance disorders. As a consequence, the clinical diagnosis and therewith connected the decision on the appropriate genetic test is often a challenge. In fact, the clinician asking for genetic testing has to weigh different aspects in this decision process, including appropriateness (single gene test, stepwise procedure, comprehensive testing), turnaround time as the basis for rapid intervention, and economic considerations. Therefore, a frequent question in that context is ‘what to test when’. In this review, we aim to review genetic testing strategies and their strengths and limitations and to raise awareness for the future implementation of interdisciplinary genome medicine in diagnoses, treatment, and counselling of growth disturbances.

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Muriel Houang Laboratoire des Explorations Fonctionnelles Endocriniennes, Hôpital Armand Trousseau, AP-HP Sorbonne Université, Paris, France

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Thao Nguyen-Khoa Centre Régional de Dépistage Néonatal-Ile de France, Hôpital Necker-Enfants Malades, AP-HP Centre Université de Paris, Paris, France

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Thibaut Eguether Sorbonne Université, INSERM, Centre de Recherche Saint-Antoine, Paris, France
Département de Métabolomique Clinique, Hôpital Saint-Antoine, AP-HP Sorbonne Université, Paris, France

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Bettina Ribault Sorbonne Université, INSERM, Centre de Recherche Saint-Antoine, Paris, France
Département de Métabolomique Clinique, Hôpital Saint-Antoine, AP-HP Sorbonne Université, Paris, France

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Séverine Brabant Laboratoire d’Explorations Fonctionnelles, Hôpital Necker-Enfants Malades, AP-HP Centre Université de Paris, Paris, France

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Michel Polak Centre Régional de Dépistage Néonatal-Ile de France, Hôpital Necker-Enfants Malades, AP-HP Centre Université de Paris, Paris, France
Université de Paris, INSERM, Institut IMAGINE, Hôpital Necker-Enfants Malades, AP-HP, Paris, France

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Irène Netchine Laboratoire des Explorations Fonctionnelles Endocriniennes, Hôpital Armand Trousseau, AP-HP Sorbonne Université, Paris, France
Sorbonne Université, INSERM, Centre de Recherche Saint-Antoine, Paris, France
Hôpital Armand Trousseau, AP-HP Sorbonne Université, Paris, France

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Antonin Lamazière Sorbonne Université, INSERM, Centre de Recherche Saint-Antoine, Paris, France
Département de Métabolomique Clinique, Hôpital Saint-Antoine, AP-HP Sorbonne Université, Paris, France

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Neonatal screening for congenital adrenal hyperplasia (CAH) faces many specific challenges. It must be done using a performant analytical approach that combines sensitivity and specificity to capture the potential causes of mortality during the first week of life, such as salt wasting and glucocorticoid deficiency. Here, we confirm that maternal inhaled corticosteroid intake during pregnancy is a possible cause of missed CAH diagnosis. Thanks to liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS) analysis, we were able to quantify endogenous steroid metabolites and also detect the presence of exogenous steroids in the dried blood spot of a newborn. Adding LC-MS/MS analysis as second-tier test, especially one that includes both 17-hydroxyprogesterone and 21-deoxycortisol measurements, would probably improve CAH diagnosis. In familial neonatal screening one could also look for maternal corticosteroid therapies that are hidden to prevent false-negative tests.

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Alberto Battezzati International Center for the Assessment of Nutritional Status, DeFENS, University of Milan, Milan, Italy

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Andrea Foppiani International Center for the Assessment of Nutritional Status, DeFENS, University of Milan, Milan, Italy

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Gianfranco Alicandro Cystic Fibrosis Center, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Ca’ Granda, Ospedale Maggiore Policlinico, University of Milan, Milan, Italy

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Arianna Bisogno Cystic Fibrosis Center, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Ca’ Granda, Ospedale Maggiore Policlinico, University of Milan, Milan, Italy

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Arianna Biffi Cystic Fibrosis Center, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Ca’ Granda, Ospedale Maggiore Policlinico, University of Milan, Milan, Italy

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Giorgio Bedogni Department of Medical and Surgical Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy
Internal Medicine, S. Maria delle Croci Hospital, AUSL Romagna, Ravenna, Italy

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Simona Bertoli International Center for the Assessment of Nutritional Status, DeFENS, University of Milan, Milan, Italy
Istituto Auxologico Italiano, IRCCS, Obesity Unit - Laboratory of Nutrition and Obesity Research, Department of Endocrine and Metabolic Diseases, Milan, Italy

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Giulia De Carlo International Center for the Assessment of Nutritional Status, DeFENS, University of Milan, Milan, Italy

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Erica Nazzari Cystic Fibrosis Center, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Ca’ Granda, Ospedale Maggiore Policlinico, University of Milan, Milan, Italy

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Carla Colombo Cystic Fibrosis Center, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Ca’ Granda, Ospedale Maggiore Policlinico, University of Milan, Milan, Italy

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Objective

Diabetes is a frequent comorbidity in cystic fibrosis (CF), related to multiple unfavorable outcomes. During the progression of β-cell dysfunction to diabetes, insulin deficiency could possibly reduce the anabolic support to grow even in the absence of significant glycemic derangements. To test this hypothesis, we evaluated whether prepuberal insulin secretory indices are independent predictors of adult height.

Design

Observational cohort study.

Research design and methods

A longitudinal analysis of 66 CF patients (33 females) from an ongoing cohort received at prepuberal age (median age of 12 years) modified 3-h oral glucose tolerance tests with 30-min insulin and C-peptide sampling, modeling of insulin secretory and sensitivity parameters, anthropometric evaluation. The latter was repeated when adults after a median follow-up of 9 years.

Results

In alternative models, we found a positive association with either basal insulin secretion (mean 0.22, 95% CI 0.01, 0.44 z-scores) or prepuberal β-cell glucose sensitivity (mean 0.23, 95% CI 0.00, 0.46 z-scores) and adult height, while total insulin secretion was negatively related to adult height (mean −0.36, 95% CI −0.57, −0.15 z-scores or mean −0.42, 95% CI −0.69, −0.16 z-scores, respectively). The high total insulin secretion of low adult height patients was mainly due to late (>60 min) secretion and was associated with a worse glucose response during OGTT.

Conclusions

Abnormal insulin secretion associated with high glucose response during OGTT predicts a decrease in adult height z-score. Our results suggest that insulin secretory defects in CF affect growth prior to the development of fasting hyperglycemia.

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Sommayya Aftab Department of Paediatric Endocrinology, Great Ormond Street Hospital, London, UK

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Diliara Gubaeva Department of Paediatric Endocrinology, Endocrinology Research Centre, Moscow, Russia

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Jayne A L Houghton The Genomics Laboratory, Royal Devon & Exeter NHS Foundation Trust, Exeter, UK

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Antonia Dastamani Department of Paediatric Endocrinology, Great Ormond Street Hospital, London, UK

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Ellada Sotiridou Department of Paediatric Endocrinology, Great Ormond Street Hospital, London, UK

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Clare Gilbert Department of Paediatric Endocrinology, Great Ormond Street Hospital, London, UK

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Sarah E Flanagan Institute of Biomedical and Clinical Science, University of Exeter Medical School, Exeter, UK

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Anatoly Tiulpakov Department of Paediatric Endocrinology, Endocrinology Research Centre, Moscow, Russia

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Maria Melikyan Department of Paediatric Endocrinology, Endocrinology Research Centre, Moscow, Russia

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Pratik Shah Department of Paediatric Endocrinology, Great Ormond Street Hospital, London, UK

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Background

Hyperinsulinism/hyperammonemia (HI/HA) syndrome is the second most common type of congenital hyperinsulinism caused by an activating GLUD1 mutation.

Objective

The aim of this study was to determine the clinical profile and long-term neurological outcomes in children with HI/HA syndrome.

Method

This study is a retrospective review of patients with GLUD1 mutation, treated at two centers in the UK and Russia, over a 15-year period. Different risk factors for neuro-developmental disorders were analysed by Mann–Whitney U test and Fisher’s exact P test.

Results

We identified 25 cases with GLUD1 mutations (12 males). Median age of presentation was 7 months (12 h–18 months). Hypoglycaemic seizures were the presenting feature in 24 (96%) cases. Twenty four cases responded to diazoxide and protein restriction whilst one patient underwent partial pancreatectomy. In total, 13 cases (52%) developed neurodevelopmental manifestations. Epilepsy (n = 9/25, 36%), learning difficulties (n = 8/25, 32%) and speech delay (n = 8/25, 32%) were the most common neurological manifestation. Median age of presentation for epilepsy was 12 months with generalised tonic-clonic seizures being the most common (n = 4/9, 44.4%) followed by absence seizures (n = 3/9, 33.3%). Early age of presentation (P = 0.02), diazoxide dose (P = 0.04) and a mutation in exon 11 or 12 (P = 0.01) were associated with neurological disorder.

Conclusion

HI/HA syndrome is associated with wide spectrum of neurological disorders. These neurological manifestations were more frequent in cases with mutations affecting the GTP-binding site of GLUD1 in our cohort.

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A Bergougnoux Service de Génétique Moléculaire et de Cytogénétique, Centre Hospitalier Universitaire de Montpellier, Université de Montpellier, Montpellier, France

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L Gaspari Département d'Endocrinologie et de Gynécologie Pédiatrique, Hôpital Arnaud de Villeneuve, Université de Montpellier, Montpellier, France
INSERM Unité 1203 (DEFE), Université de Montpellier, Montpellier, France

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M Soleirol Département de Pediatrie, CHU Nîmes, France, Université de Montpellier Faculté de Médecine Montpellier-Nîmes, Montpellier, France

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N Servant Service de Génétique Moléculaire et de Cytogénétique, Centre Hospitalier Universitaire de Montpellier, Université de Montpellier, Montpellier, France

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S Soskin Département de Pédiatrie, Centre Hospitalier Universitaire Hautepierre de Strasbourg, Strasbourg, France

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S Rossignol Département de Pédiatrie, Centre Hospitalier Universitaire Hautepierre de Strasbourg, Strasbourg, France

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K Wagner-Mahler Département de Pédiatrie, CHU Nice, Hôpitaux Pédiatriques de Nice CHU-Lenval, Nice, France

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J Bertherat Department of Endocrinology, French Reference Center for Rare Adrenal Disorders, Hôpital Cochin, Université Paris Cité, Institut Cochin, Assitance Publique-Hôpitaux de Paris, Paris, France

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C Sultan Département d'Endocrinologie et de Gynécologie Pédiatrique, Hôpital Arnaud de Villeneuve, Université de Montpellier, Montpellier, France

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N Kalfa Department of Pediatric Urological Surgery, French Reference Center for abnormalities of Genital Development (DevGen), CHU Lapeyronie, Montpellier University, Montpellier, France

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F Paris Service de Génétique Moléculaire et de Cytogénétique, Centre Hospitalier Universitaire de Montpellier, Université de Montpellier, Montpellier, France
Département d'Endocrinologie et de Gynécologie Pédiatrique, Hôpital Arnaud de Villeneuve, Université de Montpellier, Montpellier, France
INSERM Unité 1203 (DEFE), Université de Montpellier, Montpellier, France

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Although hyperandrogenism is a frequent cause of consultation in adolescent girls, more severe forms with virilization must lead to suspicion of an adrenal or ovarian tumor. However, they may also reveal a 46,XY disorder of sexual development (DSD). Here, we describe four adolescent girls referred for pubertal virilization and in whom we diagnosed a 46,XY DSD. We performed gene mutation screening by Sanger sequencing (all patients) and by next-generation sequencing (NGS) in patient #4. We identified new heterozygous NR5A1 gene variants in patients #1 and #2 and a homozygous SRD5A2 gene deletion in patient #3. Patient #4 received a diagnosis of complete androgen insensitivity in childhood; however, due the unusual pubertal virilization, we completed the gene analysis by NGS that revealed two heterozygous HSD17B3 variants. This work underlines the importance of considering the hypothesis of 46,XY DSD in adolescent girls with unexplained virilization at puberty.

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Martijn J J Finken Department of Pediatric Endocrinology, Emma Children’s Hospital, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands

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Aleid J G Wirix Department of Public and Occupational Health, EMGO Institute for Health and Care Research, Amsterdam University Medical Centers, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands

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Ines A von Rosenstiel-Jadoul Department of Pediatrics, Rijnstate Hospital, Arnhem, The Netherlands

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Bibian van der Voorn Department of Pediatric Endocrinology and Obesity Center CGG, Erasmus MC Sophia Children’s Hospital, Rotterdam, The Netherlands

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Mai J M Chinapaw Department of Public and Occupational Health, EMGO Institute for Health and Care Research, Amsterdam University Medical Centers, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands

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Michaela F Hartmann Steroid Research and Mass Spectrometry Unit, Laboratory for Translational Hormone Analytics, Department of Pediatric Endocrinology & Diabetology, Center of Child and Adolescent Medicine, Justus Liebig University, Giessen, Germany

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Joana E Kist-van Holthe Department of Public and Occupational Health, EMGO Institute for Health and Care Research, Amsterdam University Medical Centers, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands

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Stefan A Wudy Steroid Research and Mass Spectrometry Unit, Laboratory for Translational Hormone Analytics, Department of Pediatric Endocrinology & Diabetology, Center of Child and Adolescent Medicine, Justus Liebig University, Giessen, Germany

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Joost Rotteveel Department of Pediatric Endocrinology, Emma Children’s Hospital, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands

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Objective

Childhood obesity is associated with alterations in hypothalamus–pituitary–adrenal axis activity. We tested the hypothesis that multiple alterations in the metabolism of glucocorticoids are required for the development of hypertension in children who become overweight.

Methods

Spot urine for targeted gas chromatography-mass spectrometry steroid metabolome analysis was collected from (1) overweight/hypertensive children (n  = 38), (2) overweight/non-hypertensive children (n  = 83), and (3) non-overweight/non-hypertensive children (n  = 56).

Results

The mean (± s.d.) age of participants was 10.4 ± 3.4 years, and 53% of them were male. Group 1 and group 2 had higher excretion rates of cortisol and corticosterone metabolites than group 3 (869 (interquartile range: 631–1352) vs 839 (609–1123) vs 608 (439–834) μg/mmol creatinine × m2 body surface area, P < 0.01, for the sum of cortisol metabolites), and group 1 had a higher excretion rate of naive cortisol than group 3. Furthermore, groups differed in cortisol metabolism, in particular in the activities of 11β-hydroxysteroid dehydrogenases, as assessed from the ratio of cortisol:cortisone metabolites (group 2 < group 3), 5α-reductase (group 1 > group 2 or 3), and CYP3A4 activity (group 1 < group 2 or 3).

Discussion

The sequence of events leading to obesity-associated hypertension in children may involve an increase in the production of glucocorticoids, downregulation of 11β-hydroxysteroid dehydrogenase type 1 activity, and upregulation of 5α-reductase activity, along with a decrease in CYP3A4 activity and an increase in bioavailable cortisol.

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