hrp0094p1-9 | Adrenal A | ESPE2021

Backdoor Pathway hormones and 11-oxygenated Androgens are elevated in Patients with 21-hydroxylase deficiency

Kulle Alexandra , Lamprecht Tabea , Pinto Francisca , Wulf Kristina , Hornig Nadine , Reinehr Thomas , Holterhus Paul-Martin ,

Background: Patients with 21-Hydroxylase deficiency (21OHD) present increased levels of cytochrome P450 21-hydroxylase substrates, like progesterone and 17α-hydroxyprogesterone. Previous studies could show that these hormones are involved in the production of androgens via the backdoor pathway. As a second source of androgens, 11-oxyandrogens derived from the human adrenal glands are recognized as being major androgens. Specifically, 11-oxyandrogens ...

hrp0094p1-147 | Sex Endocrinology and Gonads B | ESPE2021

A pre-analytical challenge to determine estradiol in children: A monovette systematically causing increased estradiol-concentrations in LC-MS/MS analysis

Lamprecht Tabea , Kleber Michaela , Rothermel Juliane , Holterhus Paul-Martin , Kulle Alexandra ,

Introduction: In children, estradiol (E2) concentrations are 1000-times lower in comparison to their precursors, the androgens. Depending on sex, age, and pathology, plasma concentrations vary in a broad range. The sensitive and specific determination of E2 is a particular challenge in pediatric endocrinology. Here we report a female patient aged 12 6/12 years and Tanner stage B1 with a presumed diagnosis of ovarian insufficiency. She showed a very high E2 con...

hrp0095rfc6.3 | Sex Development and Gonads | ESPE2022

Reference intervals of serum estradiol during childhood: comparing and reviewing five studies, effects of gender and age

Lamprecht Tabea , Reinehr Thomas , Kleber Michaela , Rothermel Juliane , Schulz Esther , Simic-Schleicher Gunter , Heger Sabine , Holterhus Paul-Martin , Kulle Alexandra

Background: Specific measurement of low serum / plasma concentrations of 17β-estradiol (E2) is important in pre-pubertal and pubertal children in routine paediatric endocrinology. However, there is still a gap in available reference intervals (RIs) for E2 in paediatrics. The study was partially funded by the German Ministry of Health, grant number 2519FSB503.Objective: First, we technically developed a highly sensit...

hrp0097rfc1.6 | Adrenals and HPA Axis | ESPE2023

Interlaboratory comparison of LC-MS/MS measurements of 11 relevant steroid hormones in 27 DSD patients

Kulle Alexandra , Lamprecht Tabea , Caliebe Amke , Blankenstein Oliver , Neumann Uta , Reisch Nicole , Bidlingmaier Martin , Döhnert Ulla , Hiort Olaf , Holterhus Paul-Martin

Background: Adults with congenital adrenal hyperplasia due to 21-hydroxylase deficiency (21OHD) develop an adverse metabolic and cardiovascular risk profile. Both over- and undertreatment with glucocorticoids are associated with these adverse metabolic effects. There is limited data available of changes in cardiovascular parameters during lifetime.Objective: This study aimed to evaluate unfavorable changes in cardiovascu...