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In type 1 diabetes mellitus (T1DM), growth hormone (GH) responses to provocative stimuli are normal or exaggerated, whereas the hypothalamic-pituitary-adrenal axis has been less studied. Ghrelin is a GH secretagogue that also increases adrenocorticotropic hormone (ACTH) and cortisol levels, similarly to GH-releasing peptide–6 (GHRP-6). Ghrelin's effects in patients with T1DM have not been evaluated...
In thyrotoxicosis GH responses to stimuli are diminished and the hypothalamic–pituitary–adrenal axis is hyperactive. There are no data on ghrelin or GHRP-6-induced GH, ACTH and cortisol release in treated hyperthyroidism. We, therefore, evaluated these responses in 10 thyrotoxic patients before treatment and in 7 of them after treatment. GHRH-induced GH release was also studied. Peak GH (μg/L; mean ± SE)...
Background In Cushing’s disease (CD), adrenocorticotrophic hormone (ACTH)/cortisol responses to growth hormone secretagogues (GHS), such as ghrelin and GHRP‐6, are exaggerated. The effect of clinical treatment of hypercortisolism with ketoconazole on ACTH secretion in CD is controversial. There are no studies evaluating ACTH/cortisol responses to GHS after prolonged ketoconazole use in these patients...
Thyrotoxicosis might alter the hypothalamic-pituitary-adrenal (HPA) axis. We evaluated the effects of ghrelin and GHRP-6 on the HPA axis in 20 hyperthyroid patients and in 9 controls. Mean basal cortisol (μg/dl) and ACTH (pg/ml) levels were higher in hyperthyroidism (cortisol: 10.7 ± 0.7; ACTH: 21.5 ± 2.9) compared to controls (cortisol: 8.1 ± 0.7; ACTH: 13.5 ± 1.8). In thyrotoxicosis ∆ AUC cortisol...
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