Endocrine Abstracts

Carney’s complex was first identified as the association of primary adrenal nodular dysplasia, lentigines and cardiac and skin myxomas. Several other endocrine and non-endocrine disorders were subsequently added to the complex, including pituitary tumors and melanotic Schwannomas. We herewith describe a kindred with Carney’s complex featuring acromegaly as the common denominator.Patients & methods: A 42-year-old woman first presented to our...

Anorexia nervosa (AN) is a psychiatric disorder featuring multiple endocrine abnormalities, comprising a decrease in IGF-I production and an increase in GH concentrations. This resistance to GH action may contribute to impaired haematopoiesis in AN as GH/IGF-I modulate blood cell proliferation and GH therapy exerts beneficial effects on hematocrit values in GH deficient patients. Aim of the present study is to evaluate the link between GH/IGF-I status and haematologic p...

Corticotropin-releasing hormone (CRH) is known to be produced and secreted by normal rat corticotropes and to contribute in a paracrine manner to POMC synthesis and ACTH secretion in these cells. The regulation of intrapituitary CRH however still has to be clarified.Aim: This study was to establish whether CRH gene expression can be measured in rat pituitaries in vitro and whether CRH modulates its own gene expression within the pitu...

Pomc synthesis and ACTH secretion by the anterior pituitary are controlled by two major, opposing players namely CRH and glucocorticoids. Most studies were performed on the AtT-20 mouse corticotroph tumor cell line or Pomc-transfected cells.Aim: Aim of the present study was to evaluate the effect of CRH and DEX on Pomc expression and ACTH secretion in normal rat corticotropes in vitro.Methods: Rat anteri...

In a small but not negligible proportion of thalassemic patients, a true growth hormone deficiency (GHD), not secondary to pubertal delay, can be documented. Among the features of adult GHD syndrome, osteoporosis leads to a 2.5-fold increase in fracture risk. Thalassemia is characterized by a peculiar bone disease leading to osteopenia. The effectiveness of GH treatment in GHD adult thalassemic patients has not been explored yet. We report here the case of such a patient, disp...

DNA methylation has recently been shown to play a role in postnatal as well as developmental gene regulation. Transfer and removal of methyl groups from CpG islands in the promoter region of specific genes has been associated with gene silencing or activation, respectively. POMC is known to present several methylation sites and demethylation of these sites has been shown to be linked to POMC expression by neuroendocrine tumors outside the pituitary.<p class="...

Eating disorders are less common in men than in women. Furthermore, in males, a restrictive eating behaviour is frequently secondary to other psychiatric disorders. In case of suspected primary anorexia nervosa (AN), in male patients it is obviously impossible to rely on a typical clinical sign as is amenorrhea.Case description: A 23-yr old man came to our observation because of an important weight loss in the last two years (from 60 to 48 kg, body mass ...

Cushing’s disease, i.e. cortisol excess due to an ACTH-secreting pituitary adenoma, is a rare disorder with considerable morbidity and mortality. Current therapeutic strategies include pituitary surgery, radiation, adrenalectomy and medical treatment with steroidogenesis inhibitors, as drugs aimed at the pituitary adenoma are as yet under investigation. Experimental data showed that retinoic acid restrains ACTH secretion by tumoral corticotrophes thus we decided to evalua...

Increasing evidence has recently accumulated suggesting that IGF1 system is involved in the regulation of longevity. While in animal models alterations of IGF1 signalling increase life expectancy, in humans there are contradictory data. Centenarians are an extraordinary model to study human longevity, however, they present a number of drawbacks: rarity, frailty due to extreme age and lack of a control group of the same age. The availability of an age-matched control group is c...

By direct measurement of muscle sympathetic nerve activity (MSNA) we previously demonstrated a markedly decreased adrenergic tone in newly diagnosed acromegalic patients. The present study was aimed at confirming this finding in a larger group of patients and establishing the pathophysiological role of insulin resistance, GH and IGF1 levels, circulating leptin and extracellular water (ECW) in this abnormality.Study design: Fifteen de novo patients...