ESPE Abstracts

Background: Determination of obese children/adolescents at an increased risk of cardio-metabolic complications is of paramount significance for early intervention.Objective and hypotheses: To determine the value of simple anthropometric measures of obesity (BMI-SDS, waist circumference (WC)-SDS, waist-to-height ratio (WHR)) in the determination of individuals at an increased risk for selected cardio-metabolic complications (impaired glucose metabolism, d...

Background: Congenital hypogonadotropic hypogonadism (HH) is a rare but clinically and genetically heterogeneous disease characterized by an absent or incomplete puberty and infertility. The association of HH with hyposmia or anosmia is defined as Kallmann syndrome. Molecular genetic testing of HH is valuable, as it can prompt the treatment in adolescence.Objective and hypotheses: To identify causative variants in genes associated with HH in a cohort of ...

Introduction: Recently novel approaches, through implementation of next-generation sequencing (NGS) in clinical practice for genetic evaluation of idiopathic short stature, has permitted to identify new variants of genes which modulate function of growth plate, including heterozygous mutations of the aggrecan gene. Aggrecan, a large chondroitin sulfated proteoglycan, is a major structural component of the extracellular matrix of cartilage, including growth pla...

Background: The major genetic causes of CPP are the paternally inherited Makorin RING-finger protein 3 (MKRN3) and Delta-like homolog 1 (DLK1) deficiencies. Exceedingly rare patients with CPP carry variants in kisspeptin system. The CPP genes are also associated with the age at menarche in the population as demonstrated by genome-wide association studies (GWAS). Nuclear Receptor Coactivator 5 (NCOA5) is a coregulator for the alpha and beta estrogen receptors a...

Nicotinamide nucleotide transhydrogenase (NNT) is expressed in the heart, thyroid, and testicles, where it maintains the balance of reactive oxygen species in the mitochondria. It is linked, by an insufficiently described mechanism, to primary adrenal insufficiency (PAI) with or without mineralocorticoid insufficiency and several extra-adrenal manifestations (i.e. gonadal adrenal rest tumors, cardiomyopathy, hypothyroidism, and precocious puberty). A comprehensive and chronolo...

Background: Gonadotropin-releasing hormone (GNRH) and its receptor (GNRHR) are central regulators of puberty. Loss-of-function mutations of the GNRH-GNRHR signaling pathway are associated with congenital hypogonadotropic hypogonadism, but no mutations were reported so far in patients with central precocious puberty (CPP). Animal data demonstrate the importance of microRNAs in pubertal timing regulation. Among others, miR200b regulates Gnrh1 gene expression in GnRH neu...

Background: Disorders of androgen synthesis are rare causes of 46,XY disorder of sex development (DSD) that present with undervirilization or sex reversal.Objective: A history of a female adolescent with 46,XY DSD, initially suspected to have complete androgen insensitivity is presented.Methods: Patient history was obtained from the medical records. Urinary steroid profile was preformed using gas chromatography/mass spectrometry. T...

Background: MKRN3 gene, encoding Makorin RING-finger protein 3, is a maternally imprinted gene located at a Prader-Willi syndrome region on chromosome 15q11.13. Deleterious mutations of MKRN3 gene are a common cause of paternally inherited central precocious puberty (CPP), being identified in 33-46% of familial cases and in about 5% and 40% of apparently sporadic female and male cases, respectively.Objectives: To evaluate the presence o...

Introduction: The major genetic cause of CPP is the paternally inherited Makorin RING-finger protein 3 (MKRN3) deficiency. Rare patients carry variants in kisspeptin and its receptor and DLK1.Objectives: To identify genetic causes of CPP.Population and methods: MKRN3 Sanger sequencing was performed in 56 unrelated subjects (12 familial non-maternal, 44 sporadic (6 boys)), whole-ge...