View clinical trials related to Hypopituitarism.
Filter by:Oxytocin (OT) is a hypothalamic peptide that enters the peripheral circulation via the posterior pituitary gland. OT plays a key role in regulating appetite, psychopathology, prosocial behavior and sexual function. Hypopituitarism is associated with increased obesity, increased psychopathology, sexual and prosocial dysfunction despite appropriate hormone replacement. A few studies suggest the existence of a possible OT deficient state in hypopituitarism. In animal models, melatonin has shown to increase OT release. This study is designed to evaluate oxytocin values after administration of melatonin in adults (healthy volunteers and patients with hypopituitarism). The investigators hypothesize that OT response will be blunted following melatonin in patients with hypopituitarism compared to healthy controls.
The diagnosis of secondary hypoadrenalism and GH deficiency (GHD) often requires the performance of a dynamic test. The glucagon stimulation test (GST) is one of the options for evaluating hypothalamic-pituitary function, representing a stimulus for both the corticotropic and somatotropic axis, substantially safe and easily available. The standard procedure involves the intramuscular injection of 1-1.5 mg of glucagon based on the patient's weight. In addition to its antero-pituitary function, glucagon has also shown its ability to stimulate neurohypophyseal secretion. Using the copeptin dosage, it has been shown that after the administration of glucagon in healthy subjects there is a significant release of ADH. However, the available data are scarse and there is no standardized protocol for the use of the glucagon test in diabetes insipidus. At the moment, GST is not the most frequently chosen diagnostic option. In fact, despite having the advantage of being able to investigate different areas of anterohypophyseal and probably posterohypophyseal function at the same time, the test has some disadvantages: the prolonged duration makes the procedure challenging, the intramuscular injection can be unwelcome, and many variables can come into play in the definition of a normal response (age, BMI, glycemic status). The recent introduction of a single-dose nasal powder formulation (Baqsimi®) could overcome some of the limitations of classic GST and make the procedure less demanding. To date, no assessments are yet available regarding a purely diagnostic role in the context of hypopituitarism of this new formulation. Through the knowledge of the physiological response of the adrenocortical, somatotropic and ADH axis to the administration of intranasal glucagon in healthy subjects, it will be possible to evaluate its possible application in the diagnosis of GH deficiency, central adrenal insufficiency and possibly diabetes insipidus.
The effects of acute administration of non-steroidal anti-inflammatory drugs (NSAIDs) on the neuroendocrine regulation of hydro-electrolytic metabolism are not precisely known to date. Although the mechanism by which NSAIDs favor the antidiuretic action of vasopressin (AVP) in the kidney has been partially elucidated, their influence on the mechanisms responsible for regulating its secretion are less known. The interactions between NSAIDs and natriuretic peptides are also not entirely certain. The present pharmacological research study therefore aims to investigate, in a cohort of healthy subjects, the acute effects of intravenous infusion of diclofenac sodium on the neuroendocrine regulation systems of water and salt balance (i.e. the antidiuretic axis and the system of natriuretic peptides).
Oxytocin (OT) is a hypothalamic peptide that enters the peripheral circulation via the posterior pituitary gland. OT plays a key role in regulating appetite, psychopathology, prosocial behavior and sexual function. Hypopituitarism is associated with increased obesity, increased psychopathology, sexual and prosocial dysfunction despite appropriate hormone replacement. A few studies suggest the existence of a possible OT deficient state in hypopituitarism. In animal models, corticorelin hormone (CRH) has shown to increase OT release. This study is designed to evaluate oxytocin values after administration of CRH in adults (healthy volunteers and patients with hypopituitarism). The investigators hypothesize that OT response will be blunted following CRH in patients with hypopituitarism compared to healthy controls.
Growth hormone (GH) is essential for longitudinal bone growth and somatic development. These protein anabolic effects require sufficient nutritional supply. During fasting and caloric restriction GH predominantly promotes fat metabolism. GH counteracts the effect of insulin in many tissues, of which insulin-stimulated glucose uptake in skeletal muscle has been most extensively studied. Substrate competition between elevated free fatty acids and glucose is suggested as a mechanism, and this hypothesis can be tested mechanistically by means of acipimox, which is a nicotinic acid that suppresses the fat metabolizing effects of GH. The hypothesis is, that the suppressive effect of GH on insulin-stimulated glucose uptake in skeletal muscle is obviated by acipimox-induced inhibition of fat metabolism. In order to investigate this, eight adult hypopituitary patients with documented GH-deficiency will be studied in the presence and absence of GH and acipimox, respectively, and biopsies from skeletal muscle and subcutaneous adipose tissue will be analyzed. Knowledge of the effects of growth hormone and fat metabolism can in shot-sight as well as in long-sight have great importance for the understanding of growth disorders from overweight and type 2 diabetes to malnutrition and eating disorders.
Retrospective trial of 300 patients with pituitary insufficiency treated in Department of Medica Endocrinology, Rigshospitalet, Copenhagen University concerning levothyroxine (T4) replacement and cardiovascular risk factors. The hypothesis is that subtle central hypothyroidism is associated with adverse cardiac risk factors, such as body composition and serum lipids, and that improved T4 replacement will eliminate this increased risk, independently of other pituitary hormone replacements.
This study will investigate the non-growth-hormone-dependent metabolic effects of the hormone Ghrelin in growth hormone deficient subjects by examining the insulin tolerance as well as signal proteins in fat and muscle biopsies.
The Hypopituitary Control and Complications Study "HypoCCS" is a prospective, open label, global, multicentre, observational study on routine clinical care of adults with growth hormone deficiency occurring either isolated or in combination with other pituitary hormone deficiencies. The objective of this observational study is to evaluate long-term safety and health outcomes for adult growth hormone deficient participants with or without somatropin replacement therapy. As an observational study, data are collected only as provided at the discretion of the attending physician. The participant enrolled meet the criteria of growth hormone deficiency in adults as per the Humatrope label in the country where their attending physician practices, and this diagnosis is at the discretion of the attending physician. The decision to receive somatropin or remain untreated is made by the participant in consultation with their attending physician. While treatment of adult growth hormone deficient participants with somatropin has been shown to be safe and effective in clinical trials of 18 months duration, this observational study aims to provide information on health outcome and replacement therapy over longer periods of time for a larger number of participants in the context of the overall disease environment.
The purpose of the study is to estimate the incidence of posttraumatic hypopituitarism, and to identify predisposing factors in order to establish a rational responsible socioeconomic screening program.
This study is conducted in the United States of America (USA). The aim of this observational study is to collect data concerning the treatment outcomes and safety for children and adults who are prescribed Norditropin®. Specific objectives include: 1) developing models defining the relationship of Norditropin dose to changes in insulin-like growth factor (IGF-I) and treatment outcomes, accounting for independent factors such as age, gender and puberty and 2) determining the relative predictive values of peak growth hormone (GH) and IGF-I levels and other factors before treatment to clinical outcomes.