Endocrine Abstracts

Introduction: Visfatin is a protein secreted by adipose tissue which was discovered as a protein with insulin-mimetic properties. Experimental and clinical studies demonstrated that visfatin can be involved in the pathogenesis of insulin resistance. It was demonstrated that plasma visfatin is elevated in insulin resistant states i.e. obesity, type two diabetes mellitus, PCOS. In vitro study showed that insulin inhibits visfatin release from adipocytes. The aim of the pr...

Numerous studies indicate an association between low-grade chronic inflammation and predisposition to type 2 diabetes and atherosclerosis. IL-12 is a proinflammatory cytokine with proatherogenic properties. IL-12 is a disulfide-linked, 70 kDa (p70) heterodimeric glycoprotein composed of a 40 kDa (p40) subunit and a 35 kDa (p35) subunit. Many data reported higher levels of p40 subunit than total IL-12. The aim of the present study was to estimate serum IL-12 and p40 subunit in ...

Polycystic ovary syndrome (PCOS) is heterogeneous disorder leading to infertility. The introduction of Rotterdam criteria creates different PCOS phenotypes, i.e. hyperandrogenic anovulatory with (A) and without (B) polycystic ovaries (PCO) morphology in ultrasonography (usg), hyperandrogenic ovulatory with PCO morphology in usg (C), non-hyperandrogenic anovulatory with PCO morphology in usg (D). In PCOS insulin resistance might be involved in the development of endocrine and m...

Fibroblast growth factor 21 (FGF21) might increase glucose uptake in adipocytes and reduce plasma glucose and triglycerides in animal models of diabetes. The aim of the present study was to assess serum FGF21 concentration in lean and obese subjects, its regulation by hyperinsulinemia and relationship with insulin sensitivity and glucose and lipid oxidation. We examined 76 subjects with normal glucose tolerance, 36 lean (BMI <25 kg/m2) and 39 overweight or obese...

Polycystic ovary syndrome (PCOS) is a main cause of women infertility. There are data suggesting an increased risk for cardiovascular disease in PCOS. Insulin resistance might play a role in the pathogenesis of PCOS and its metabolic complications. The aim of the study was to asses the prevalence of The National Cholesterol Education Program (NCEP)-defined metabolic syndrome (MS) in women with PCOS in relation to insulin resistance and endothelial dysfunction – soluble E-...

Anorexia nervosa (AN) is an eating disorder, resulting in sustained low weight. In AN, similarly to syndromes of lipodystrophy, one observes the significant loss of the adipose tissue. In lipodystrophies, despite the lack of subcutaneous adipose tissue, insulin resistance is observed. Adipose tissue is known as a source of a variety of bioactive peptides, known as adipocytokines. The aim of the present study was to examine the plasma concentration of adipocytokines in relation...

Visfatin is a newly discovered protein secreted by adipose tissue, which is suggested to play a role in pathogenesis of insulin resistance. Polycystic ovary syndrome (PCOS) is heterogeneous disorder, where insulin resistance might be involved in the development of endocrine and metabolic abnormalities. The aim of the present study was to asses the relation between serum visfatin and insulin sensitivity and markers of hyperandrogenism in a lean and obese PCOS patients. The stud...

The pathogenesis of insulin resistance is not completely understood, however, there are data that it might be associated with altered tissue carbohydrate and lipid oxidation. Adiponectin may be a key regulator of insulin sensitivity and energy metabolism. The aim of the present study was to determine the association of adiponectin, glucose metabolism (oxidation and storage) and lipid oxidation by applying the euglycemic clamp technique and indirect calorimetry.<p class="ab...

Differentiated thyroid cancer (DTC) is the most common malignant neoplasm arising from the thyroid parenchymal cells. DTC incidence is steadily increasing worldwide and there are approximately 1700 new cases/per year in Poland. The biopsy with subsequent thyroid resection plays a central role in the diagnosis and treatment of this malignancy. After surgery, radioactive iodine (RAI) treatment is recommended to eradicate potential residual disease and improve prognosis. Due to t...

Background: The gradual increase in the detection rate of adrenal incidentalomas makes them a common clinical problem. The vast majority of them are benign adrenocortical adenomas. Nevertheless every patient with adrenal incidentaloma requires performing number of tests to exclude pheochromocytoma, autonomous cortisol secretion, adrenal carcinoma and primary hyperaldosteronism. Evaluation of whether adrenal incidentalomas are malignant or functional and continuing patient foll...