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1.
JCEM Case Rep ; 2(3): luae034, 2024 Mar.
Article in English | MEDLINE | ID: mdl-38440127

ABSTRACT

Here, we present the case of a 40-year-old man in whom the diagnosis of ectopic adrenocorticotropin (ACTH) syndrome went unrecognized despite evaluation by multiple providers until it was ultimately suspected by a nephrologist evaluating the patient for edema and weight gain. On urgent referral to endocrinology, screening for hypercortisolism was positive by both low-dose overnight dexamethasone suppression testing and 24-hour urinary free cortisol measurement. Plasma ACTH values confirmed ACTH-dependent Cushing syndrome. High-dose dexamethasone suppression testing was suggestive of ectopic ACTH syndrome. Inferior petrosal sinus sampling demonstrated no central-to-peripheral gradient, and 68Ga-DOTATATE scanning revealed an avid 1.2-cm left lung lesion. The suspected source of ectopic ACTH was resected and confirmed by histopathology, resulting in surgical cure. While many patients with Cushing syndrome have a delayed diagnosis, this case highlights the critical need to increase awareness of the signs and symptoms of hypercortisolism and to improve the understanding of appropriate screening tests among nonendocrine providers.

2.
J Endocrinol Invest ; 47(1): 101-113, 2024 Jan.
Article in English | MEDLINE | ID: mdl-37314685

ABSTRACT

CONTEXT: Cushing syndrome (CS) is associated with different hematological abnormalities. Nevertheless, conflicting data about erythropoiesis in CS have been reported. Furthermore, it is unclear whether CS sex and subtype-specific alterations in red blood cells (RBC) parameters are present. OBJECTIVE: To investigate sex and subtype-specific changes in RBC in patients with CS at initial diagnosis and after remission. DESIGN: Retrospective, monocentric study including 210 patients with CS (women, n = 162) matched 1:1 for sex and age to patients with pituitary microadenomas or adrenal incidentalomas (both hormonally inactive). RBC parameters were evaluated at initial diagnosis and after remission. RESULTS: Women with CS had higher hematocrit (median 42.2 vs 39.7%), hemoglobin (14.1 vs 13.4 g/dl) and mean corpuscular volume (MCV) (91.2 vs 87.9 fl) compared to the controls (all p < 0.0001). Women with Cushing disease (CD) showed higher hematocrit, RBC and hemoglobin levels than those with ectopic Cushing (ECS) (all p < 0.005). Men with CS had lower hematocrit (42.9 vs 44.7%), RBC count (4.8 vs 5.1n*106/µl) and hemoglobin (14.2 vs 15.4 g/dl), but higher MCV (90.8 vs 87.5 fl) than controls (all p < 0.05). In men with CS, no subtype-specific differences were identified. Three months after remission hemoglobin decreased in both sexes. CONCLUSION: CS is characterized by sexual and subtype-specific differences in RBC parameters. Compared to controls, women with CS showed higher hematocrit/hemoglobin levels, whereas men had lower hematocrit/hemoglobin, which further decreased directly after remission. Therefore, anemia should be considered as complication of CS in men. In women, differences in RBC parameters may help to differentiate CD from ECS.


Subject(s)
Adrenal Gland Neoplasms , Cushing Syndrome , Pituitary ACTH Hypersecretion , Male , Humans , Female , Erythropoiesis , Retrospective Studies , Hematocrit , Hemoglobins
3.
Biol Pharm Bull ; 46(7): 969-978, 2023.
Article in English | MEDLINE | ID: mdl-37394647

ABSTRACT

11ß-Hydroxysteroid dehydrogenase type 1 (11ß-HSD1) is the only enzyme that converts inactive glucocorticoids to active forms and plays an important role in the regulation of glucocorticoid action in target tissues. JTT-654 is a selective 11ß-HSD1 inhibitor and we investigated its pharmacological properties in cortisone-treated rats and non-obese type 2 diabetic Goto-Kakizaki (GK) rats because Asians, including Japanese, are more likely to have non-obese type 2 diabetics. Systemic cortisone treatment increased fasting plasma glucose and insulin levels and impaired insulin action on glucose disposal rate and hepatic glucose production assessed by hyperinsulinemic-euglycemic clamp, but all these effects were attenuated by JTT-654 administration. Cortisone treatment also reduced basal and insulin-stimulated glucose oxidation in adipose tissue, increased plasma glucose levels after administration of the pyruvate, the substrate of gluconeogenesis, and increased liver glycogen content. Administration of JTT-654 also inhibited all of these effects. Cortisone treatment decreased basal and insulin-stimulated 2-deoxy-D-[1-3H]-glucose uptake in 3T3-L1 adipocytes and increased the release of free fatty acids and glycerol, a gluconeogenic substrate, from 3T3-L1 adipocytes, and JTT-654 significantly attenuated these effects. In GK rats, JTT-654 treatment significantly reduced fasting plasma glucose and insulin levels, enhanced insulin-stimulated glucose oxidation in adipose tissue, and suppressed hepatic gluconeogenesis as assessed by pyruvate administration. These results demonstrated that glucocorticoid was involved in the pathology of diabetes in GK rats, as in cortisone-treated rats, and that JTT-654 ameliorated the diabetic conditions. Our results suggest that JTT-654 ameliorates insulin resistance and non-obese type 2 diabetes by inhibiting adipose tissue and liver 11ß-HSD1.


Subject(s)
Cortisone , Diabetes Mellitus, Type 2 , Insulin Resistance , Rats , Animals , Glucocorticoids/therapeutic use , 11-beta-Hydroxysteroid Dehydrogenase Type 1 , Cortisone/therapeutic use , Cortisone/pharmacology , Blood Glucose , Diabetes Mellitus, Type 2/drug therapy , Obesity/pathology , Insulin , Glucose
4.
Life Sci ; 322: 121681, 2023 Jun 01.
Article in English | MEDLINE | ID: mdl-37040814

ABSTRACT

AIM: Glucocorticoids (GCs) play a crucial role in energy homeostasis including white adipose tissue function; however, chronic GC excess is detrimental to mammals' health. White hypertrophic adiposity is a main factor for neuroendocrine-metabolic dysfunctions in monosodium L-glutamate (MSG)-damaged hypercorticosteronemic rat. Nevertheless, little is known about the receptor path in endogenous GC impact on white adipose tissue-resident precursor cells to bring them into beige lineage. Thus, our aim was to explore whether transient/chronic endogenous hypercorticosteronemia affects browning capacity in white adipose tissue pads from MSG rats during development. MAIN METHODS: Control and MSG male rats aged 30 and 90 days were 7-day exposed to cold conditions in order to stimulate wet white epidydimal adipose tissue (wEAT) beiging capacity. This procedure was also replicated in adrenalectomized rats. KEY FINDINGS: Data indicated that whereas epidydimal white adipose tissue pads from prepubertal hypercorticosteronemic rats retained full expression of GR/MR genes resulting in a drastic reduction in wEAT beiging capacity, conversely, chronic hypercorticosteronemic adult MSG rats developed down-regulation of corticoid genes (and reduced GR cytosolic mediators) in wEAT pads and consequently partially restored local beiging capacity. Finally, wEAT pads from adrenalectomized rats revealed up-regulation of GR gene accompanied by full local beiging capacity. SIGNIFICANCE: This study strongly supports a GR-dependent inhibitory effect of GC excess on white adipose tissue browning, an issue strongly supporting a key role of GR in the non-shivering thermogenic process. As a consequence, normalizing the GC milieu could be a relevant factor to handle dysmetabolism in white hyperadipose phenotypes.


Subject(s)
Adipose Tissue, White , Receptors, Glucocorticoid , Animals , Male , Rats , Adipocytes, White/metabolism , Adipose Tissue/metabolism , Adipose Tissue, Brown/metabolism , Adipose Tissue, White/metabolism , Adiposity , Energy Metabolism , Glucocorticoids/metabolism , Mammals/metabolism , Obesity/metabolism , Receptors, Glucocorticoid/metabolism , Thermogenesis
5.
Cardiovasc Res ; 119(8): 1740-1750, 2023 Jul 06.
Article in English | MEDLINE | ID: mdl-36368681

ABSTRACT

AIMS: High salt intake is common and contributes to poor cardiovascular health. Urinary sodium excretion correlates directly with glucocorticoid excretion in humans and experimental animals. We hypothesized that high salt intake activates the hypothalamic-pituitary-adrenal axis activation and leads to sustained glucocorticoid excess. METHODS AND RESULTS: In male C57BL/6 mice, high salt intake for 2-8 weeks caused an increase in diurnal peak levels of plasma corticosterone. After 2 weeks, high salt increased Crh and Pomc mRNA abundance in the hypothalamus and anterior pituitary, consistent with basal hypothalamic-pituitary-adrenal axis activation. Additionally, high salt intake amplified glucocorticoid response to restraint stress, indicative of enhanced axis sensitivity. The binding capacity of Corticosteroid-Binding Globulin was reduced and its encoding mRNA downregulated in the liver. In the hippocampus and anterior pituitary, Fkbp5 mRNA levels were increased, indicating increased glucocorticoid exposure. The mRNA expression of the glucocorticoid-regenerating enzyme, 11ß-hydroxysteroid dehydrogenase Type 1, was increased in these brain areas and in the liver. Sustained high salt intake activated a water conservation response by the kidney, increasing plasma levels of the vasopressin surrogate, copeptin. Increased mRNA abundance of Tonebp and Avpr1b in the anterior pituitary suggested that vasopressin signalling contributes to hypothalamic-pituitary-adrenal axis activation by high salt diet. CONCLUSION: Chronic high salt intake amplifies basal and stress-induced glucocorticoid levels and resets glucocorticoid biology centrally, peripherally and within cells.


Subject(s)
Glucocorticoids , Hypothalamo-Hypophyseal System , Humans , Mice , Animals , Male , Glucocorticoids/metabolism , Hypothalamo-Hypophyseal System/metabolism , Sodium Chloride, Dietary , Pituitary-Adrenal System/metabolism , Mice, Inbred C57BL , Vasopressins/genetics , Vasopressins/metabolism , RNA, Messenger/genetics , RNA, Messenger/metabolism
6.
J Clin Med ; 11(23)2022 Nov 28.
Article in English | MEDLINE | ID: mdl-36498610

ABSTRACT

The survival rate of adrenal Cushing syndrome patients has been greatly increased because of the availability of appropriate surgical and pharmacological treatments. Nevertheless, increased possibility of a heart attack induced by a cardiovascular event remains a major risk factor for the survival of affected patients. In experimental studies, hypercortisolemia has been found to cause cardiomyocyte hypertrophy via glucocorticoid receptor activation, including the possibility of cross talk among several hypertrophy signals related to cardiomyocytes and tissue-dependent regulation of 11ß-hydroxysteroid dehydrogenase type 1. However, the factors are more complex in clinical cases, as both geometric and functional impairments leading to heart failure have been revealed, and their associations with a wide range of factors such as hypertension are crucial. In addition, knowledge regarding such alterations in autonomous cortisol secretion, which has a high risk of leading to heart attack as well as overt Cushing syndrome, is quite limited. When considering the effects of treatment, partial improvement of structural alterations is expected, while functional disorders are controversial. Therefore, whether the normalization of excess cortisol attenuates the risk related to cardiac hypertrophy has yet to be fully elucidated.

7.
Expert Rev Endocrinol Metab ; 17(2): 99-109, 2022 03.
Article in English | MEDLINE | ID: mdl-35220871

ABSTRACT

INTRODUCTION: Endogenous Cushing's syndrome (CS) is a rare, multi-systemic condition resulting from chronic glucocorticoid excess sustained by a pituitary adenoma (Cushing's disease, CD), an adrenal adenoma or, less frequently, a neuroendocrine tumor. The optimal first-line option is surgery, but when it is contraindicated/refused, or in case of severe, life-threatening disease, medical treatment is a first-line choice. Osilodrostat (LCI699, Isturisa®) is a new, orally active adrenal steroidogenesis inhibitor currently approved by the FDA and EMA for the treatment of endogenous CS. AREAS COVERED: We illustrate the pharmacologic profile of osilodrostat and summarize the efficacy and safety of osilodrostat from the first phase I studies to the most recent evidence. EXPERT OPINION: Osilodrostat acts as a potent, reversible inhibitor of 11ß-hydroxylase (CYP11B1) and 18-hydroxylase (or aldosterone synthase, CYP11B2), counteracting both gluco- and mineralocorticoid production. According to the results of the LINC1, LINC2, and LINC3 studies and the preliminary findings of LINC4, osilodrostat offers an excellent efficacy in controlling hypercortisolism with a good tolerability. The non-negligible risk of adrenal insufficiency/steroid withdrawal symptoms, hypokalemia, and hyperandrogenism disorders, and the possibility, albeit rare, of pituitary tumor enlargement, require further confirmation and careful monitoring.


Subject(s)
Cushing Syndrome , Pituitary ACTH Hypersecretion , Pituitary Neoplasms , Adult , Cushing Syndrome/drug therapy , Humans , Imidazoles/therapeutic use , Mixed Function Oxygenases/therapeutic use , Pituitary ACTH Hypersecretion/drug therapy , Pituitary Neoplasms/drug therapy , Pyridines , Tablets/therapeutic use
8.
Front Endocrinol (Lausanne) ; 12: 731579, 2021.
Article in English | MEDLINE | ID: mdl-34489873

ABSTRACT

The occurrence of different subtypes of endogenous Cushing's syndrome (CS) in single individuals is extremely rare. We here present the case of a female patient who was successfully cured from adrenal CS 4 years before being diagnosed with Cushing's disease (CD). The patient was diagnosed at the age of 50 with ACTH-independent CS and a left-sided adrenal adenoma, in January 2015. After adrenalectomy and histopathological confirmation of a cortisol-producing adrenocortical adenoma, biochemical hypercortisolism and clinical symptoms significantly improved. However, starting from 2018, the patient again developed signs and symptoms of recurrent CS. Subsequent biochemical and radiological workup suggested the presence of ACTH-dependent CS along with a pituitary microadenoma. The patient underwent successful transsphenoidal adenomectomy, and both postoperative adrenal insufficiency and histopathological workup confirmed the diagnosis of CD. Exome sequencing excluded a causative germline mutation but showed somatic mutations of the ß-catenin protein gene (CTNNB1) in the adrenal adenoma, and of both the ubiquitin specific peptidase 8 (USP8) and the glucocorticoid receptor (NR3C1) genes in the pituitary adenoma. In conclusion, our case illustrates that both ACTH-independent and ACTH-dependent CS may develop in a single individual even without evidence for a common genetic background.


Subject(s)
Cushing Syndrome/genetics , Endopeptidases/genetics , Endosomal Sorting Complexes Required for Transport/genetics , Pituitary ACTH Hypersecretion/genetics , Receptors, Glucocorticoid/genetics , Ubiquitin Thiolesterase/genetics , beta Catenin/genetics , Adenoma/diagnosis , Adenoma/genetics , Adenoma/surgery , Adrenal Cortex Neoplasms/diagnosis , Adrenal Cortex Neoplasms/genetics , Adrenal Cortex Neoplasms/surgery , Adrenalectomy/adverse effects , Cushing Syndrome/complications , Cushing Syndrome/diagnosis , Female , Germany , Humans , Middle Aged , Mutation , Pituitary ACTH Hypersecretion/complications , Pituitary ACTH Hypersecretion/diagnosis
9.
J Mol Endocrinol ; 66(4): 273-283, 2021 04 22.
Article in English | MEDLINE | ID: mdl-33739937

ABSTRACT

Glucocorticoid excess often causes a variety of cardiovascular complications, including hypertension, atherosclerosis, and cardiac hypertrophy. To abrogate its cardiac side effects, it is necessary to fully disclose the pathophysiological role of glucocorticoid in cardiac remodelling. Previous clinical and experimental studies have found that omentin-1, one of the adipokines, has beneficial effects in cardiovascular diseases, and is closely associated with metabolic disorders. However, there is no evidence to address the potential role of omentin-1 in glucocorticoid excess-induced cardiac injuries. To uncover the links, the present study utilized rat model with glucocorticoid-induced cardiac injuries and clinical patients with abnormal cardiac function. Chronic administration of glucocorticoid excess reduced rat serum omentin-1 concentration, which closely correlated with cardiac functional parameters. Intravenous administration of adeno-associated virus encoding omentin-1 upregulated the circulating omentin-1 level and attenuated glucocorticoid excess-induced cardiac hypertrophy and functional disorders. Overexpression of omentin-1 also improved cardiac mitochondrial function, including the reduction of lipid deposits, induction of mitochondrial biogenesis, and enhanced mitochondrial activities. Mechanistically, omentin-1 phosphorylated and activated the GSK3ß pathway in the heart. From a study of 28 patients with Cushing's syndrome and 23 healthy subjects, the plasma level of glucocorticoid was negatively correlated with omentin-1, and was positively associated with cardiac ejection fraction and fractional shortening. Collectively, the present study provided a novel role of omentin-1 in glucocorticoid excess-induced cardiac injuries and found that the omentin-1/GSK3ß pathway was a potential therapeutic target in combating the side effects of glucocorticoid.


Subject(s)
Cardiomegaly/genetics , Cushing Syndrome/genetics , Cytokines/genetics , Glycogen Synthase Kinase 3 beta/genetics , Lectins/genetics , Animals , Cardiomegaly/chemically induced , Cardiomegaly/therapy , Cushing Syndrome/blood , Cushing Syndrome/pathology , Female , Glucocorticoids/blood , Glucocorticoids/toxicity , Healthy Volunteers , Humans , Male , Mitochondria/genetics , Phosphorylation/genetics , Rats , Signal Transduction/genetics
10.
BMC Endocr Disord ; 21(1): 11, 2021 Jan 08.
Article in English | MEDLINE | ID: mdl-33419423

ABSTRACT

BACKGROUND: Endogenous Cushing's syndrome (CS) results in increased cardiovascular (CV) morbidity and mortality. So far, most studies focussed on distinct disease entities rather than the integrity of the CV system. We here describe the design of the Cardiovascular Status in Endogenous Cortisol Excess Study (CV-CORT-EX), a study aiming to comprehensively investigate the health status of patients with endogenous CS (with a particular focus on CV phenotypes, biochemical aspects, quality of life, and psychosocial status). METHOD: A prospective non-interventional cohort study performed at a German tertiary referral centre. At the time of enrolment, patients will be categorised as: (1) newly diagnosed overt CS, (2) recurrent overt CS, (3) CS in remission, (4) presence of mild autonomous cortisol excess (MACE). The target cohorts will be n = 40 (groups 1 + 2), n = 80 (group 3), and n = 20 (group 4). Patients with overt CS at the time of enrolment will be followed for 12 months after remission (with re-evaluations after 6 and 12 months). At each visit, patients will undergo transthoracic echocardiography, cardiac magnetic resonance imaging, 24-h electrocardiogram, 24-h blood pressure measurement, and indirect evaluation of endothelial function. Furthermore, a standardised clinical investigation, an extensive biochemical workup, and a detailed assessment of quality of life and psychosocial status will be applied. Study results (e.g. cardiac morphology and function according to transthoracic echocardiography and cardiac magnetic resonance imaging; e.g. prevalence of CV risk factors) from patients with CS will be compared with matched controls without CS derived from two German population-based studies. DISCUSSION: CV-CORT-EX is designed to provide a comprehensive overview of the health status of patients with endogenous CS, mainly focussing on CV aspects, and the holistic changes following remission. TRAIL REGISTRATION: ClinicalTrials.gov ( https://clinicaltrials.gov/ ) NCT03880513, registration date: 19 March 2019 (retrospectively registered). Protocol Date: 28 March 2014, Version 2.


Subject(s)
Cardiovascular Diseases/diagnosis , Cushing Syndrome/diagnosis , Hydrocortisone/blood , Adult , Aged , Blood Pressure , Cardiovascular Diseases/blood , Cohort Studies , Cushing Syndrome/blood , Echocardiography , Electrocardiography , Female , Follow-Up Studies , Germany , Heart/diagnostic imaging , Humans , Hypertrophy, Left Ventricular/complications , Hypertrophy, Left Ventricular/diagnosis , Magnetic Resonance Imaging , Male , Middle Aged , Prospective Studies , Quality of Life , Recurrence , Risk Factors , Social Behavior
11.
Molecules ; 25(7)2020 Mar 25.
Article in English | MEDLINE | ID: mdl-32218328

ABSTRACT

Glucocorticoid hormones are vital; their accurate operation is a necessity at all ages and in all life situations. Glucocorticoids regulate diverse physiological processes and they use many signaling pathways to fulfill their effect. As the operation of these hormones affects many organs, the excess of glucocorticoids is actually detrimental to the whole human body. The endogenous glucocorticoid excess is a relatively rare condition, but a significant proportion of adult people uses glucocorticoid medication for the treatment of chronic illnesses, therefore they are exposed to the side effects of long-term glucocorticoid treatment. Our review summarizes the adverse effects of glucocorticoid excess affecting bones, adipose tissue, brain and skin, focusing on those effects which involve the Wnt/ß-catenin pathway.


Subject(s)
Glucocorticoids/metabolism , Wnt Signaling Pathway , beta Catenin/metabolism , Adiposity , Animals , Humans , Models, Biological , Organ Specificity
12.
Curr Hypertens Rep ; 19(12): 100, 2017 Nov 14.
Article in English | MEDLINE | ID: mdl-29138984

ABSTRACT

The metabolic syndrome describes a clustering of risk factors-visceral obesity, dyslipidaemia, insulin resistance, and salt-sensitive hypertension-that increases mortality related to cardiovascular disease, type 2 diabetes, cancer, and non-alcoholic fatty liver disease. The prevalence of these concurrent comorbidities is ~ 25-30% worldwide, and metabolic syndrome therefore presents a significant global public health burden. Evidence from clinical and preclinical studies indicates that glucocorticoid excess is a key causal feature of metabolic syndrome. This is not increased systemic in circulating cortisol, rather increased bioavailability of active glucocorticoids within tissues. This review examines the role of covert glucocorticoid excess on the hypertension of the metabolic syndrome. Here, the role of the 11ß-hydroxysteroid dehydrogenase enzymes, which exert intracrine and paracrine control over glucocorticoid signalling, is examined. 11ßHSD1 amplifies glucocorticoid action in cells and contributes to hypertension through direct and indirect effects on the kidney and vasculature. The deactivation of glucocorticoid by 11ßHSD2 controls ligand access to glucocorticoid and mineralocorticoid receptors: loss of function promotes salt retention and hypertension. As for hypertension in general, high blood pressure in the metabolic syndrome reflects a complex interaction between multiple systems. The clear association between high dietary salt, glucocorticoid production, and metabolic disorders has major relevance for human health and warrants systematic evaluation.


Subject(s)
11-beta-Hydroxysteroid Dehydrogenases/physiology , Hypertension/physiopathology , Metabolic Syndrome/physiopathology , Animals , Glucocorticoids/physiology , Humans , Receptors, Glucocorticoid/physiology , Receptors, Mineralocorticoid/physiology , Sodium/metabolism
13.
Nutr Metab Cardiovasc Dis ; 26(2): 85-102, 2016 Feb.
Article in English | MEDLINE | ID: mdl-26905474

ABSTRACT

BACKGROUND: Hyperglycemia is a common feature associated with states of increased growth hormone secretion and glucocorticoid levels. AIMS: The purpose of these guidelines is to assist clinicians and other health care providers to take evidence-based therapeutic decisions for the treatment of hyperglycemia in patients with growth hormone and corticosteroid excess. METHODOLOGY: Both the SID and SIE appointed members to represent each society and to collaborate in Guidelines writing. Members were chosen for their specific knowledge in the field. Each member agreed to produce--and regularly update--conflicts of interest. The Authors of these guidelines prepared their contributions following the recommendations for the development of Guidelines, using the standard classes of recommendation shown below. All members of the writing committee provided editing and systematic review of each part of the manuscript, and discussed the grading of evidence. Consensus was guided by a systematic review of all available trials and by interactive discussions.


Subject(s)
Acromegaly/complications , Blood Glucose/drug effects , Cushing Syndrome/complications , Endocrinology/standards , Hyperglycemia/drug therapy , Hypoglycemic Agents/therapeutic use , Acromegaly/diagnosis , Acromegaly/therapy , Biomarkers/blood , Blood Glucose/metabolism , Consensus , Cushing Syndrome/diagnosis , Cushing Syndrome/therapy , Humans , Hyperglycemia/blood , Hyperglycemia/diagnosis , Hyperglycemia/etiology , Hypoglycemic Agents/adverse effects , Italy , Societies, Medical , Treatment Outcome
14.
J Endocrinol Invest ; 39(2): 235-55, 2016 Feb.
Article in English | MEDLINE | ID: mdl-26718207

ABSTRACT

Hyperglycemia is a common feature associated with states of increased growth hormone secretion and glucocorticoid levels. The purpose of these guidelines is to assist clinicians and other health care providers to take evidence-based therapeutic decisions for the treatment of hyperglycemia in patients with growth hormone and corticosteroid excess. Both the SID and SIE appointed members to represent each society and to collaborate in Guidelines writing. Members were chosen for their specific knowledge in the field. Each member agreed to produce-and regularly update-conflicts of interest. The authors of these guidelines prepared their contributions following the recommendations for the development of Guidelines, using the standard classes of recommendation shown below. All members of the writing committee provided editing and systematic review of each part of the manuscript, and discussed the grading of evidence. Consensus was guided by a systematic review of all available trials and by interactive discussions.


Subject(s)
Acromegaly/therapy , Cushing Syndrome/therapy , Evidence-Based Medicine , Hyperglycemia/prevention & control , Precision Medicine , Acromegaly/blood , Acromegaly/metabolism , Acromegaly/physiopathology , Combined Modality Therapy , Consensus , Cushing Syndrome/blood , Cushing Syndrome/metabolism , Cushing Syndrome/physiopathology , Diabetes Mellitus/physiopathology , Diabetes Mellitus/therapy , Endocrinology/methods , Glucocorticoids/blood , Glucocorticoids/metabolism , Human Growth Hormone/blood , Human Growth Hormone/metabolism , Humans , Hyperglycemia/etiology , Italy , Societies, Scientific
15.
Int J Biochem Cell Biol ; 45(10): 2230-8, 2013 Oct.
Article in English | MEDLINE | ID: mdl-23872437

ABSTRACT

PURPOSE: Muscle atrophy is a frequent complication of chronic kidney disease (CKD) and is associated with increased morbidity and mortality. The processes causing loss of muscle mass are also present in several catabolic conditions. Understanding the pathogenesis of CKD-induced muscle loss could lead to therapeutic interventions that prevent muscle wasting in CKD and potentially, other catabolic conditions. MAJOR FINDINGS: Insulin or IGF-1 resistance caused by CKD, acidosis, inflammation, glucocorticoids or cancer causes defects in insulin-stimulated intracellular signaling that suppresses IRS-1 activity leading to decreased phosphorylation of Akt (p-Akt). A low p-Akt activates caspase-3 which provides muscle proteins substrates of the ubiquitin-proteasome system (UPS). A low p-Akt also leads to decreased phosphorylation of forkhead transcription factors which enter the nucleus to stimulate the expression of atrogin-1/MAFbx and MuRF1, E3 ubiquitin ligases that can be associated with proteolysis of muscle cells by the UPS. Caspase-3 also stimulates proteasome-dependent proteolysis in muscle. SUMMARY: In CKD, diabetes, inflammatory conditions or in response to acidosis or excess glucocorticoids, insulin resistance develops, initiating reduced IRS-1/PI3K/Akt signaling. In CKD, this reduces p-Akt which stimulates muscle proteolysis by activating caspase-3 and the UPS. Second, caspase-3 cleaves actomyosin yielding substrates for the UPS and increased proteasome-mediated proteolysis. Third, p-Akt down-regulation suppresses myogenesis in CKD. Fourth, exercise in CKD stimulates insulin/IGF-1 signaling to reduce muscle atrophy. Lastly, there is evidence that microRNAs influence insulin signaling providing a potential opportunity to design therapeutic interventions. This article is part of a Directed Issue entitled: Molecular basis of muscle wasting.


Subject(s)
Muscle, Skeletal/metabolism , Muscular Atrophy/metabolism , Renal Insufficiency/metabolism , Animals , Humans , Insulin-Like Growth Factor I/metabolism , Metabolism , Muscle, Skeletal/pathology , Muscular Atrophy/pathology , Phosphorylation , Renal Insufficiency/pathology , Signal Transduction
16.
Arq. bras. endocrinol. metab ; 51(8): 1381-1391, nov. 2007. ilus, graf
Article in English | LILACS | ID: lil-471755

ABSTRACT

Cushing's syndrome (CS) is a chronic and systemic disease caused by endogenous or exogenous hypercortisolism, associated with an increase of mortality rate due to the clinical consequences of glucocorticoid excess, especially cardiovascular diseases. After cure, usually obtained by the surgical removal of the tumor responsible for the disease, the normalization of cortisol secretion is not constantly followed by the recovery of the clinical complications developed during the active disease, and it is often followed by the development of novel clinical manifestations induced by the fall of cortisol levels. These evidences were mostly documented in patients with pituitary-dependent CS, after surgical resection of the pituitary tumor. Indeed, despite an improvement of the mortality rate, metabolic syndrome and the consequent cardiovascular risk have been found to partially persist after disease remission, strictly correlated to the insulin resistance. Skeletal diseases, mainly osteoporosis, improve after normalization of cortisol levels but require a long period of time or the use of specific treatment, mainly bisphosphonates, to reach the normalization of bone mass. A relevant improvement or resolution of mental disturbances has been described in patients cured from CS, although in several cases, cognitive decline persisted and psychological or psychiatric improvement was erratic, delayed, or incomplete. On the other hand, development or exacerbation of autoimmune disorders, mainly thyroid autoimmune diseases, was documented in predisposed patients with CS after disease remission. The totality of these complications persisting or occurring after successful treatment contribute to the impairment of quality of life registered in patients with CS after disease cure.


A síndrome de Cushing (SC) é uma desordem sistêmica crônica causada por hipercortisolismo endógeno ou exógeno, associada a um aumento da taxa de mortalidade devido às conseqüências clínicas do excesso de glicocorticóides, especialmente a doença cardiovascular. Após a cura, usualmente obtida pela remoção cirúrgica do tumor responsável pela desordem, a normalização da secreção de cortisol não é sistematicamente seguida da recuperação das complicações clínicas desenvolvidas durante a fase ativa da doença, e é freqüentemente seguida pelo surgimento de novas manifestações clínicas induzidas pela queda dos níveis de cortisol. Estas evidências foram, na sua maioria, documentadas em pacientes com SC de origem hipofisária, após a ressecção cirúrgica do tumor na hipófise. Na verdade, a despeito de uma melhoria na taxa de mortalidade, a síndrome metabólica e seu conseqüente risco cardiovascular têm se mostrado parcialmente persistentes após a remissão da doença, em estrita relação com a resistência à insulina. Anormalidades esqueléticas, especialmente a osteoporose, melhoram após a normalização dos níveis de cortisol, mas requerem um longo tempo ou o uso de tratamento específico, principalmente bisfosfonatos, para se obter a normalização da massa óssea. Uma melhora significativa ou mesmo resolução dos distúrbios mentais têm sido descritos em pacientes curados da SC, embora em vários casos o declínio cognitivo persista e a melhora psicológica ou psiquiátrica tenham sido erráticas, demoradas ou incompletas. Por outro lado, o desenvolvimento ou exacerbação de processos autoimunes, em especial as doenças autoimunes da tiróide, foram documentadas em pacientes predispostos com SC, após a remissão da doença. A totalidade dessas complicações, persistentes ou ocorrendo após o tratamento bem sucedido, contribuem para um prejuízo da qualidade de vida registrado em pacientes com SC após a cura da doença.


Subject(s)
Humans , Cushing Syndrome , Autoimmune Diseases/etiology , Bone Diseases/etiology , Cardiovascular Diseases/etiology , Cushing Syndrome/blood , Cushing Syndrome/complications , Cushing Syndrome/mortality , Cushing Syndrome/surgery , Hydrocortisone/blood , Kidney Diseases/etiology , Metabolic Syndrome/etiology , Remission Induction , Treatment Outcome
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