Endocrine Abstracts

Aims: We investigate the influence of GIP on ghrelin secretion in normal glucose tolerant individuals with the use of the firstly applied correlation network analysis on human plasma metabolome data.Methods: To address this issue, we employed a GIP-infusion test and euglycemic- and hyperglycemic glucose clamp experiments combined with infusion of GIP or placebo in a cross-over manner in non diabetic obese male subjects (n=14). Moreover, we firstly...

The diabetic epidemic is increasing worldwide. The suppressor of cytokine signaling 3 (SOCS3) provides a link between cytokine action and their negative consequences on insulin signaling. This potential influence on the development of T2DM makes the gene a potential candidate gene for type 2 diabetes.We investigated the one haplotype tagging single nucleotide polymorphism (htSNP) rs4969168 to examine the impact on T2DM in two independent study population...

Objectives: Premature estrogen deficiency and menopause are associated with increases in body weight and fat mass. Ovariectomized (OVX) mice also show reduced locomotor activity. Because glucose-dependent-insulinotropic-polypeptide (GIP) is known to play an important role both in fat metabolism and locomotor activity, we hypothesized that effects of estrogen on the regulation of body weight, fat mass and spontaneous physical activity could be mediated in part by GIP signaling....

Objective: Adiposity, insulin resistance, and hyperandrogenism are features of the polycystic ovary syndrome (PCOS). Retinol-binding protein 4 (RBP4) secreted from adipose and liver tissue has been linked to insulin resistance. We here address the impact of RBP4 on insulin resistance in PCOS and its usability to identify women with metabolic syndrome or impaired glucose metabolism (IGT or diabetes).Design: RBP4 was determined in plasma of 115 PCOS...

Objectives: Insulin resistance (IR) is a very common metabolic abnormality in obesity, which is often associated with reduced growth hormone (GH) secretion. GH deficiency is associated with increased in intra-abdominal fat and several parameters of the metabolic syndrome. IGF-I improves IR but the IGF-binding proteins are supposed to regulate its bioactivity although only little information exists. We postulated that the elevated insulin levels due to IR do not only suppress G...

Vitamin D (vit-D) deficiency is common in patients with gastro-entero-pancreatic neuroendocrine tumours (GEP-NET) and has been linked to reduced survival in these patients. Vit-D status was assessed in 183 patients with GEP-NET, at the time of their first presentation in the ARDEN-NET-Centre; and following simple advice at routine 6-monthly follow-up appointments to increase vit-D intake using over-the-counter vit-D preparations (Colecalciferol (Vit-D3), 1000–2000 units/d...

Background: The mechanisms underlying the association between severe hypoglycaemia and increased cardiovascular mortality among patients with diabetes mellitus are not fully understood. Our aim was to evaluate changes in GH/IGF1 axis during insulin-induced hypoglycaemia, as a possible link.Methods: Twenty-five healthy subjects, 12 obese participants (OP; 6/ 6; 34.4±1.7 kg/m2), and 13 healthy lean participants (LP; 6/ 7; 21.7±0.6 kg/m...

Aim: In this study we have compared the adequacy rates of FNA samples between more experienced and less experienced operators in thyroid FNA.Introduction: The prevalence of thyroid nodules is estimated to be about 4–7%, increasing up to 50% in the adult population. US guided FNA has become the preliminary investigation of choice for thyroid nodules, as it is widely available and has been proven to increase diagnostic efficacy....

Objectives: GH measurements during OGTT have profound effects on therapy and follow-up management of acromegaly. To minimize the discordance between immunoassays, it is recommended to calibrate them using 22 kDa-GH-preparation instead of the use of pituitary-derived calibrants. The aim of our study was to evaluate the between-method discrepancies in GH determinations by assays using different calibrants considering further confounders like age, gender, and BMI.<p class="ab...

Objective: The mechanisms underlying the well known glucagon-induced satiety effect are unclear. As we showed recently, the glucagon-induced reduction in total ghrelin, that might be responsible for this effect, is exerted at hypothalamus–pituitary level. The aim of the present study was to further evaluate glucagon’s suppressive effect on both total and acylated-ghrelin in obesity with respect to its role in appetite control.Methods: Prospecti...