ESPE Abstracts

Background: Klinefelter syndrome (47,XXY; KS) influences neurodevelopment, resulting in a neurocognitive profile with a more pronounced impact on verbal IQ compared to performance IQ. Additionally, KS is linked to changes in the epigenome and transcriptome. The relation between these epigenetic and genetic changes and the neurocognitive phenotype has yet to be determined.Methods: We conducted a comprehensive and integrat...

Introduction: Primary hypogonadism is stated as one of major features in patients with Turner Syndrome (TS), however it is not a constant finding. Variable markers of ovaries failure in TS patients are still missing. The present study aimed to evaluate the usefulness of atymullerian hormone and inhibin B assessment in predicting spontaneous puberty in patients with TS.Methods: The study included 35 TS patients. Gonadal a...

Background: Existing tests are not 100% accurate in differentiating between isolated hypogonadotropic hypogonadism (HH) and constitutional delay of puberty (CDP) in boys. Inhibin B is a glycoprotein produced by the Sertoli cells and is measurable even before puberty. Its level increases at the beginning of puberty under the influence of FSH.Objective and hypotheses: The levels of inhibin B (InhB) could differentiate between HH and CDP. We aimed to establ...

Background: Turner syndrome (TS) is associated with short stature, hypogonadism, autoimmune diseases and metabolic conditions. Genome-wide changes in TS affect both transcriptome and methylome. Genomic studies have primarily focused on 45,X, but only 35-45% of the TS population has 45,X, while the remaining TS have other karyotypes.Methods: We used 5 study cohorts. A “genomic cohort” of TS with 45,X karyotype...

Background: Patients affected by pseudohypoparathyroidism type 1b (PHPI-b) develop resistance to PTH leading to hypocalcemia and hyperphosphoremia, which is often associated with resistance to TSH. PHP-Ib is associated with methylation changes at one or several differentially methylated regions (DMRs) within the GNAS complex locus, located at 20q13.2–13.3. This locus gives rise to several different transcripts (NESP55, XL, A/B), with varying patterns of imprinted expressi...

Background: Minipuberty denotes a transient activation of the hypothalamic-pituitary-gonadal (HPG) hormone axis in infancy. This activation provides an opportunity to examine the gonadal function in infants suspected of hypogonadism before the axis is silenced during childhood. However, female minipuberty remains poorly elucidated. Objective: The study aimed to evaluate dynamic changes in luteinizing hormone (LH), follic...

Background: The male Hypothalamic-Pituitary-Gonadal (HPG) axis is transiently active during the first months of life with surging serum concentrations of reproductive hormones. This period, termed minipuberty, promotes masculinization, including testicular, and penile growth, as well as further testicular descent in males. It appears to be essential for priming specific cell types, i.e. Sertoli-, Leydig-, and germ cells, including subsequent growth and maturat...

Context: The early activation of the hypothalamic-pituitary-gonadal axis during infancy can be used in the evaluation of infants suspected of disorders of sex development (DSD). However, few data exists on sex-specific reference ranges for these hormones during early life.Objective: To evaluate sex-differences in reproductive hormone concentrations in serum from healthy infants in order to define sex-specific cut-off values and to apply these in infants ...

Background & Aim: The national Danish assessment and hormone treatment program for transgender adolescents started in 2016 and follows international guidelines. We aim to investigate the effects of hormone therapy on the sex steroid metabolite profile and gonadotropins.Methods: This observational study includes 219 transgender adolescents who started hormone therapy before 18 years of age comprising 55 individuals as...

Introduction and objective: Gonadectomy was carried out for a long time after the diagnosis of complete androgen insensitivity syndrome (CAIS). It is now recommended to leave the gonads in situ in order to guarantee endogenous hormone production. It is unclear how best to clinically monitor testicular function. The aim of the study was to investigate whether inhibin B can be used as a future follow-up parameter to screen for gonadal function in CAIS p...