Endocrine Abstracts

Objective: This study was aimed to evaluate the prevalence of non classical congenital adrenal hyperplasia due to 21-hydroxylase deficiency (21-NCAH) in hyperandrogenic women in the reproductive age attending our Endocrinology Unit and to identify specific phenotypic traits among clinical, biochemical and hormonal features.Setting: Outpatient Unit of Endocrinology, S. Orsola-Malpighi University Hospital of Bologna, Italy.Patients a...

Background: Evaluation of steroid replacement therapy (SRT) in adrenal insufficiency (AI) is challenging for the lack of reliable parameters. Measurement of salivary cortisol and cortisone emerged as a non-invasive tool for AI management, however poorly investigated. Aim: To analyse the cortisol and cortisone circadian rhythm in normal controls (NC) and patients with primary AI (PAI) under different SRTs, and to identify useful biomarkers. <p class="...

Background: The classical steroidogenic route to the synthesis of dihydrotestosterone in Leydig cells involves delta-5 and delta-4 precursors. Besides, the “backdoor pathway”, encompassing progesterone metabolites, is gaining increasing interest in fetal development and men pathophysiology. Nowadays, liquid chromatography/tandem mass spectrometry (LC-MS/MS) is the ideal technique to simultaneously quantify large panels of steroids with elevated sensitivity and specif...

Background: Excess testosterone in PCOS is accompanied by increased levels of other ovarian and adrenal androgens and precursors. Recently, 11-oxygenated adrenal androgens have been postulated as major components of the circulating androgen pool in PCOS. Obesity is strictly connected with androgen excess and with the derangement of hormone circadian rhythmicity. To date, it has not been clarified whether hyperandrogenism in PCOS, either complicated by obesity or not, is accomp...

Background: Many questions concerning polycystic ovary syndrome (PCOS) remain unsolved, such as the long term evolution of cardiovascular (CV) risk markers and the risk for CV events.Methods: A total of 119 PCOS patients diagnosed in 2009 by NIH criteria at our Unit were evaluated at baseline for cardiovascular risk markers (hypertension, diabetes mellitus-DM, dyslipidaemia, obesity, carotid intima media thickness-cIMT, and epicardial fat thickness-EFT) ...

Background: HIV is associated with decreased bone mineral density (BMD) and decreased muscle mass. Osteoporosis and sarcopenia often co-exist and their onset is multifactorial. Sex steroids play a key role in the homeostasis of bone health and body composition in HIV-uninfected men, but data in MLWH are scanty.Aim: To investigate the frequency of low BMD and sarcopenia and their relationship with gonadal function in MLWH younger than 50.<p class="abs...

Background: Acylcarnitines and sphingomyelins are key players of lipid metabolism at cytosolic, vesicular and cell membrane level. Their metabolism was found deranged in diseases of the hypothalamus-pituitary-adrenal axis. Little information is available about levels of these compounds in the bloodstream and their circadian fluctuations. Dried blood spots (DBS) allow multiple autonomous and painless collections per day. However, poor biological validation data are available ab...

Introduction: Lipidomics is an emerging approach to characterize circadian rhythm alterations due to diseases of the hypothalamus-pituitary-adrenal axis. Glycerophospholipids are membrane structural constituents and key players in cell signalling, homeostasis and inflammatory and immune responses. Among blood derivatives, serum may reflect the soluble fraction, whereas dried blood spot (DBS) may reflect the cell membrane fraction of these lipids. However, little information is...

Introduction: Recent studies demonstrated that circulating concentration of many metabolites fluctuates with circadian rhythmicity. However, detailed information on amino acid and biogenic amine daily variations is still lacking. Dried blood spot (DBS) sampling appears to be a convenient tool for studies requiring multiple daily sampling.Aim: To verify the validity of DBS as a suitable device, we compared serum and DBS levels and changes along the day of...

Context: The endocannabinoid system (ECS) hypertonicity contributes to obesity development and maintenance. Excess circulating levels of ECS mediator 2-arachidonoylglycerol (2AG) were reported in obese humans, however, unstandardized experimental settings (i.e. analytical conditions, sample size, concurrent diseases/medications, statistics, gender, body mass index (BMI) and age), clouded its role in dysmetabolism and its usefulness as biomarker. The study aimed at describing 2...