Endocrine Abstracts

Introduction: Some metabolic diseases, including type 1 (T1DM) and type 2 (T2DM) diabetes mellitus have an influence on bone homeostasis. These facts are of great socio-medical impact, since currently the DM2 and osteoporosis are considered public health problems.Objectives: (1) Determine the relationship between markers of bone metabolism and insulin resistance in postmenopausal women with and without T2DM.(2) Compare the bone min...

Introduction: Primary hyperparathyroidism (PHPT) is emerging as a cause of secondary hypertension. Between 20 and 50% of patients with PHPT have hypertension, this being directly proportional to the calcemia. The elevation of blood pressure in PHPT is mediated by hypercalcemia that acts directly stimulating the contraction of muscle fibers of the arterial vessel wall, and increases plasma renin levels and the release of catecholamines.Objectives: (1) Det...

Introduction: Atrial natriuretic peptide (ANP), a member of the natriuretic peptide family, regulates several physiologic parameters including diuresis and natriuresis, and lowers arterial, blood pressure.It has been reported that plasma concentrations of ANP rise in response to acute hyperglycaemia in diabetes (1) (2) and this may indicate a neurohormonal response to limit target organ damage (3).We investigate if in situation chr...

Introduction: Its has been suggested that atrial natriuretic peptide (ANP) may contribuye to the development of microalbuminuria in diabetes mellitus.Plasma ANP concentration have been reported to be elevated in association with microalbuminuria, all of wich predict the future development of overt nephropathy in diabetes (1).Key players in neurohormonal activation include neuropeptides and their receptors wich include the ANP (2).<...

Introduction: Gender identity disorder (GID) is a disagreement between biological sexual differentiation and self-declared gender identity. The aetiology of GID remains unclear, although endocrinological, neuroanatomical and psychosocial factors are all thought to be causally involved. Polycystic ovary syndrome (PCOS) is characterized by chronic anovulation, polycystic ovarian morphology, and biochemical and/or biological signs of hyperandrogenism. Most women with PCOS also ex...

Objective: To determine the prevalence of polycystic ovary syndrome (PCOS) and hyperandrogenism and their relationships with metabolic syndrome (MS) parameters in female-to-male transsexuals (FMT).Design and methods: Seventy-seven FMT were assessed clinically and biochemically to hyperandrogenism, before the beginning of the treatment with testosterone. We also assessed cardiovascular risk factors and other parameters of MS.Results...

Background: Endothelial dysfunction may have deleterious effect cardiovascular pathology in diabetic patients.Atrial natriuretic peptide (ANP) exerts beneficial effects on the cardiovascular system in part by exerting antioxidant activity. Recently it was reported that ANP is able to exert an antihypertrophic effect in myocitos at least in part due to inhibition of NADPH oxidase and superoxido generation.It seems that hyperglucemia...

Introduction: The syndrome of late-onset hypogonadism (LOH) is a clinical and biochemical syndrome associated with advancing age male, characterized by typical symptoms and decreased serum concentrations of testosterone, which can affect multiple organ systems and may impair quality of life. The prevalence of LOH syndrome is higher in certain patient groups, obese, diabetic and suffering from erectile dysfunction manifest LOH at higher rates than the general population.<p ...

Introduction: During a normal menstrual cycle, serum levels of luteinizing hormone (LH), follicle-stimulating hormone (FSH), estradiol (E2), and progesterone (P4) can vary widely between cycles for the same woman, as well as between different women. Reliable reference values based on the local population are important for correct interpretation of laboratory results.Aims: To evaluate the discrepancy of the results on fertility hormones by two different t...

Introduction: Mechanism underlying glucose-mediated development and progression of diabetic complication are incompletely understood. Atrial natriuretic peptide (ANP) is a hormone released by atrial myocytes in response to acute and chronic extracellular volume expansion. Moderate hyperglycaemia (>400 mg/dl) in diabetic rats is associated with an elevation in circulating ANP levels and in GFR (glomerular filtration rate), (1) and play a role in the development of microalbu...