ESPE Abstracts

Background: Congenital hyperinsulinism (CHI) is a disorder characterised by dysregulation of insulin secretion that leads to severe hypoglycaemia in neonates and infants. The focal form of CHI is caused by an autosomal recessive mutation in the genes ABCC8 or KCNJ11 inherited from the father and a second somatic event in the affected islet of Langerhans.Objective: We report molecular genetic examination of focal pancreatic lesions of patients receiving t...

Background: Metformin (dimethylbiguanide) is the most widely prescribed treatment for children with T2DM. Long term controlled studies are still required to assess its effect on prediabetes dysglycemia in childrenCase presentation: A 13-year-old lean adolescent girl presented to PEC with a day history of difficult breathing associated with dry cough. No history of fever, abdominal pain, vomiting or change in bowel motion. She had a 10 months’ histor...

Background: Kallmann syndrome (KS) is a rare clinical entity, characterized by the association of hipogonadotropic hypogonadism and hypo/anosmia, with an estimated prevalence of 1:8000 in males and 1:40 000 in females.Method: Retrospective study of cases of KS diagnosed in paediatric age. Genetic analysis was performed by PCR and DNA sequencing of KAL1, FGFR1, GNRHR, GNRH1, PROK2, PROKR2, KISS1R, TAC3, TACR3, and FGF8 genes.Results...

Kallmann syndrome (KS) is a rare heterogeneous disease with hypogonadotropic hypogonadism and anosmia or hyposmia. The aim of this study is to highlight the clinical features and diagnosis of this rare event by reporting a 13-year-old Chinese boy with a novel mutation of CHD7. He presented because of short stature (−2.0 SD) for 11 years. He was born at term with a birth weight of 2.95 kg. Cryptorchidism operation was undertaken at 5 years old. He suffered from a...

Defects in the specification, migration and/or function of Gonadotropin-releasing hormone (GnRH) neurons gonadotropin-releasing hormone result in Kallmann Syndrome (KS), a rare genetic disorder characterized by hypogonadotropic hypogonadism and anosmia (lack of sense of smell). To identify new molecular causes of KS, we performed a systematic genetic interrogation via whole exome sequencing of KS families. Autosomal dominant loss-of-function mutations in TCF12, a transcription...

Objective: to assess olfactory bulbs sizes and define the most common molecular defects in adolescents with congenital isolated hypogonadotropic hypogonadism.Materials and Methods: Single-centre comparative study. 36 patients were included. The main group consisted of 21 patients with mean age of 15.9 years (17 boys, 4 girls) with congenital isolated hypogonadotropic hypogonadism (IHH): 13 patients with Kallmann syndrome...

Background: Kallmann syndrome (KS) is a genetic disorder, mainly characterized by the association of anosmia (due to hypo/aplasia of the olfactory bulbs) and hypogonadotropic hypogonadism (due to GnRH deficiency). Both partial or complete forms are described. Other features (skeletal and renal malformations, deafness, bimanual synkinesis) can be variably associated. Behind this phenotypic heterogeneity, there is a considerable complexity of genetic mutations. KAL1, <e...

Background: Kallmann syndrome is the most common form of hypogonadotropic hypogonadism and is associated with genes such as KAL1, KAL2, CHD7, NELF, PROK2, and PROKR2. Genetic factors in hypopituitarism are involved with the gene mutation of PROP1, POU1F1, HESX1, LHX3, LHX4, and PTX2. We found a novel mutation of the AVP gene in a Kallmann syndrome patient with hypopituitarism.Case presentation: The pa...

Background: GnRH neurons originate outside the CNS in the olfactory placode and migrate into the central nervous system, becoming integral components of the hypothalamic-pituitary–gonadal axis (HPG).Objective and hypotheses: We hypothesize that gene(s), whose products are important for pubertal development can be identified via autozygosity mapping together with whole exome sequencing in patients with idiopathic hypogonadotrophic hypogonadism (IHH)/...

Background: Microtubules, polar polymers of αβ-tubulin heterodimers, constitute dynamic cytoskeletal structures implicated in the regulation of axonal activity along with neuronal proliferation and migration. Tubulinopathies, caused by pathogenic variants in genes encoding different isotypes of tubulin, lead to a wide and overlapping range of nervous system malformations and neurodevelopmental disorders. Namely, heterozygous missense and nonsense mu...