Endocrine Abstracts

Introduction: Vitamin D (VD) metabolism is active in normal testis, but lost during the malignant progression from carcinoma in situ (CIS) to overt germ cell tumors (TGCTs). CIS and TGCTs are often associated with intratubular deposition of hydroxyapatite (microlithiasis). Imbalance in FGF23 and PTH homeostasis may result in calcification of mesodermal-derived tissue, so we hypothesized that this mechanism may be involved in testicular microlithiasis. Here, we investi...

Introduction: Hyponatremia (serum sodium ≤135 mmol/l), the most common electrolyte disorder encountered, has been associated with increased mortality in patients with particularly cancer, heart failure, chronic kidney and liver disease. However, evidence of the clinical implications in broader populations is scarce, and uncertain due to confounding from preexisting disease. We aimed to examine the association between admission-hyponatremia and 30-day mortality in acute n...

Introduction: The UGT2B17 gene encodes a glucuronidase which is important for the urinary excretion of testosterone. Recent studies have shown that a common deletion polymorphism in UGT2B17 is strongly associated with significant lower levels of excreted urinary testosterone in men. The objective of this study was to investigate the association of the UGT2B17 gene polymorphism and the dosages of testosterone substitution in male patients with frank hypogonadism.<p class="a...

Introduction: PCOS is characterized by insulin resistance and an increased risk of type 2 diabetes.Objective: To study the association between birth weight and risk of polycystic ovary syndrome (PCOS) in adult life in Danish women born 1973–1991.Methods: Female offspring born in Denmark during 1973–1991 of Danish mothers (n=523, 757) were included and followed for a total of 4, 739, 547 person-years at risk. Inform...

Objective: IGF1 has almost 50% amino acid sequence homology with insulin and elicits nearly the same hypoglycaemic response. Studies showed that low and high IGF1 levels are related to impaired glucose tolerance and to a higher risk of type two diabetes. The aim of the present study was to evaluate the association between IGF1 level and insulin resistance in a Danish general population.Research Design and Methods: From the cross-sectional Health2006 stud...

Background: The impact of GH on insulin sensitivity is ambiguous since both long standing GH-deficiency as well as acute GH exposure and prolonged GH-excess are associated with insulin resistance.Aim: To test the hypotheses that the insulin antagonistic effect of GH i) is dynamic and depend on ambient GH levels and ii) subsides gradually with time after GH exposure.Methods: Eight GHDA participated in a randomised crossover study. E...

Background: Previous studies have demonstrated a high overall prevalence of testicular adrenal rest tumors (TART) in adults with congenital adrenal hyperplasia (CAH), whereas little is known about the prevalence in children. The aim of this study was to determine the presence of TART according to age and genotype.Design: Retrospective study, tertiary University centre.Patients and methods: In 47 male patients (age 2.6–40.3 yea...

Context and objective: During fasting growth hormone (GH) promotes lipolysis, attenuates glucose oxidation and preserves protein. Previous studies have primarily been conducted in GH deficient patients or during somatostatin-suppression of GH secretion. We aimed to study the impact of the fasting associated increase in GH without concomitant changes in other hormones, by the means of GH receptor (GHR) blockade.Design: Ten healthy young men participated i...

Aim: To evaluate the quality of diabetes group-based education followed by shared care. The diabetes education programme had a duration of 4 days and included screening for diabetes late complications. Patients with microvascular complications should visit the diabetes clinic four times a year. Patients without microvascular complications should visit their general practitioner every third month and the diabetes clinic once a year.Methods: Retrospective ...

Background: Fasting is associated with suppression of IGF-I production, which is likely to be the stimulator of GH secretion and the subsequent increase in lipolysis. The GH signalling events subserving this switch in the actions of GH have not been studied.Aim: To assess whole body substrate metabolism and GH signalling proteins in skeletal muscle and fat in healthy human subjects in the postabsorptive state and after 38 h of fasting.<p class="abste...