Endocrine Abstracts

Introduction: Obesity does constitute one of the most common modifiable risk factors for cancer. The process of cancerogenesis is associated with the enhanced oxidative stress. Lipid peroxidation (LPO), resulting from oxidative damage to membrane lipids, as well as oxidative damage to DNA, are the most frequently examined processes to evaluate oxidative damage to macromolecules.Aim: The aim of the study was to evaluate the level of oxidative damage to me...

Bivalent iron (Fe2+), which initiates the Fenton reaction (Fe2++H2O2+H+→Fe3++•OH+H2O), is frequently used to experimentally induce oxidative damage to macromolecules. Growth hormone (GH) and the main mediator of its action – insulin-like growth factor-I (IGF-I) – are involved in oxidative processes, lipid peroxidation (LPO) included.The aim of the...

Iron participates in the Fenton reaction (Fe2++H2O2+H+→Fe3++•OH+H2O), the most basic reaction of oxidative stress. This transition metal is required to keep oxidative balance, although iron overload is associated with enhanced oxidative damage and cancer initiation. Growth hormone (GH) and insulin-like growth factor-I (IGF-I) are also involved in oxidative processes, lipid peroxidation incl...

Background: Adiponectin and resistin belong to the group of adipocytokines, that are thought to be involved in regulation of insulin sensitivity, and that also exert the opposite effects on inflammatory processes related to atherosclerosis and cardiovascular risk. Glucocorticoids have anti-inflammatory properties, but also increase insulin resistance. There are, however, conflicting data on the effects of glucocorticoids on serum concentrations of adiponectin and resistin....

Background and aims: Mechanism underlying the IR (Insulin-resistance) remains yet to be identified. Resistin has been shown to antagonize insulin action, and thus might be implicated in the pathogenesis of IR. In contrast, adiponectin has been shown to increase insulin sensitivity and improve glucose tolerance. We aimed to test the hypothesis that resistin levels might correlate positively with the indices of insulin resistance, while the opposite might be true for adiponectin...

It is recognized that a substantial proportion of patients found to have raised prolactin (PRL) level on a single testing is subsequently found to have normal PRL levels. Though this is often attributed to stress or medication factor, it should be noted, that PRL secretion displays diurnal variation with a nocturnal peak in the late-night/early morning hours. In our study we tested the hypothesis, that in some patients raised PRL levels in the morning may reflect individual di...

23-year old man was admitted to Endocrinology Department because of hypogonadism and pituitary tumor seen at CT. Diagnosis of prolactinoma was established based on high serum PRL level- 800 ng/ml and therapy with bromocriptine was instituted. On the next year a temporary loss of consciousness related to physical exertion occured. The neurological reasons were excluded and laboratory tests showed hypercalcemia, hypophosphatemia and elevated serum PTH levels. Prolactinoma and hy...

Background: Significant prevalence of hypertension in the world’s population and its consequences tend to an intensive search for pathogenesis and etiology of this disease. Epidemic of hypertension is accompanied by an epidemic of adrenal incidentaloma and grows in direct proportion to patients age. Polymorphism of aldosterone synthase (CYP11B2) in -344th region of promoter seems to have much in common with hypertension and adrenal incidentaloma.Aim...

Introduction: Fine needle aspiration biopsy (FNAB) plays a crucial role in the diagnosis of thyroid nodules. The choice of further therapeutic strategy depends largely on its result. Knowledge of the risk of malignancy in each diagnosis class in the population is necessary. The aim of the research was to analyse the risk of malignancy in thyroid nodules in each diagnosis class according to Bethesda system.Materials and methods: Retrospective research inc...

Introduction: Nowadays is believed that primary aldosteronism (PA) is the most frequent cause of secondary hypertension and reaches 10% of whole hypertensive population. The activity of the mineralocorticoid hormone may be change by polymorphism of aldosterone synthase gene (CYP11B2) e.g. in promoter -344T/C region. Aim of this study was to find differences in baseline plasma aldosterone concentration (PAC), plasma renin activity (PRA), aldosterone – renin ratio (ARR) and...