Endocrine Abstracts

Hypoglycaemia stimulation serves as a model of physiological function of adrenal action during the stress reaction. The study aimed to describe the differences of steroid response between hypoglycemia and various doses of Synacthen (as ACTH stimulation alone). The goal of the study was to investigate the physiology of adrenal response. Twenty four steroids were measured in plasma using gas chromatography - mass spectrometry after stimulation of 1 μg, 10 μg and 250 &#...

In recent years, there has been increasing evidence for the hypothesis of bones as endocrine organs. Osteocalcin, long considered just a marker of new bone formation, is now seen as the first hormone produced by bones, and seems to be associated with regulating glucose metabolism and reproduction. The aim of this work was to monitor changes of osteocalcin in reaction to hypoglycaemia, and determine if there are differences in such reactions between the sexes. The study include...

Smoking has many effects on human health and reproduction. Women are generally recommended to quit smoking before conception. Cessation improves fertility and helps avoid many health risks for the mother and the child and plays an important role in the future development and health of the offspring. We have decided to perform a study following changes in the production of steroid hormones in pregnant smokers and ex-smokers compared to non-smokers. In physiological pregnancies,...

Introduction: A precisely measured corticoid level is important for decision-making in daily clinical practice. These levels can be influenced in the pre-analytical phase, when the effect of stress, timing, and diet can be important.The aim of this study was to elucidate optimal conditions for blood sampling as well as the choice of analytical methods, which they will be used in measuring of corticoids.Methods: By studying ten wome...

Background: Secretion of insulin by beta-cells of the islets of Langerhans is a very complex dynamic process that includes basal and stimulated insulin secretion. Two phases, one early and one late, can be distinguished in insulin secretion. The early phase is characterised by the secretion of preformed insulin granules, lasts about 15 min and is formed by cephalic and gastrointestinal components. The cephalic phase of insulin secretion starts by stimulating visual, olfactory ...

Introduction: The influence of steroid hormones on food intake is well described. However, there are only a few studies on the effect of food intake on steroid levels.Methods: The study involved eight non-smoker women (average age 29.48±2.99 years; average BMI 21.3±1.3 kg/m2); they did not use any kind of medication affecting steroidogenesis. We analysed the influence of four various stimuli on the levels of steroid hormones and mela...

ACTH test is widely accepted as diagnostic tool in suspicion on peripheral as well as on central hypocorticism. The optimal dose of tetracosactide for determination of hypocorticism is still matter of debate. The 250 μg as a standard dose of tetracosactide has been approved for diagnosis of congenital adrenal hyperplasia (CAH) many years ago. Moreover, current limited availability of tetracosactide and its increased financial cost on the market raised the question whether...

The aim of the study was a detailed analysis and a comparison of hypothalamic–pituitary–adrenal axis tests and cortisol metabolites analysis during these tests. This procedure might enable to design new diagnosis algorithms of hypocorticalism and normal levels for salivary cortisol estimation for early diagnostic of patients with hypothalamic–pituitary–adrenal axis disorder as well as to give us a possibility to reveal adrenal disorder in patients on estrog...

The adrenal androgens dehydroepiandrosterone, dehydroepiandrosterone sulfate, androstenedione, 5-androstenediol and 11β-hydroxy-androstenedione have a wide spectrum of important physiological effects. Aim of our study was to find differences in reaction of the C19 Δ5-steroids between healthy women and patients with adrenal insufficiency in various doses of Synacthen (1 ug, 10 ug and 250 ug). Our study involved seven healthy women and six premenopausal females (BMI an...

Objective: Smoking during pregnancy could have impact on steroidogenesis, with more marked changes in smokers carrying boys as well as in their newborns. The aim of study was compared steroid hormones between non-smokers, ex-smokers, which stop smoking in the beginning of pregnancy, and active smokers.Method: We focused on changes in steroidogenesis in the blood of mothers in their 37th week of pregnancy and in mixed cord blood from their newb...