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Eguchi E. Primary adrenal insufficiency developed 22 years after the diagnosis of light and heavy chain deposition disease: a case report. CEN Case Rep 2024:10.1007/s13730-024-00893-z. [PMID: 38767838 DOI: 10.1007/s13730-024-00893-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Accepted: 05/13/2024] [Indexed: 05/22/2024] Open
Abstract
Monoclonal immunoglobulin deposition diseases (MIDDs), including light and heavy chain deposition disease (LHCDD), are rare and heterogeneous disorders associated with underlying B-cell clonal disorders. Adrenal involvement is a potential extrarenal manifestation of MIDDs; however, limited data are available regarding its prevalence and clinical presentation. Herein, the present report describes, for the first time, a case of primary adrenal insufficiency that developed twenty-two years after a diagnosis of LHCDD had been made. A 69 year-old woman with a 10 year history of hemodialysis suddenly became bedridden after falling down stairs in the absence of focal neurological deficits. Subsequently, she experienced appetite loss, nausea, vomiting, a fever of unknown origin, and unexplained hypotension. Several months later, primary adrenal insufficiency and normal pressure hydrocephalus were diagnosed and successfully managed. The long-term clinical prognosis of MIDDs has not been fully elucidated despite recent advances in the management of the disorders. This report may contribute to improving our understanding of the disease course.
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Affiliation(s)
- Eriko Eguchi
- Department of Internal Medicine, Osaka Roudou Eisei Center Daiichi Hospital, 6-2-2 Mitejima Nishiyodogawa-Ku, Osaka, Osaka, 555-0012, Japan.
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Abstract
In 1855, Thomas Addison described an illness now known as Addison disease (AD) caused by damage to the adrenal cortex and manifesting in weakness, weight loss, hypotension, gastrointestinal disturbances, and brownish pigmentation of the skin and mucous membranes. Corticosteroid supplementation, corticotropin (adrenocorticotropic hormone [ACTH] of medicinal use) test, and anti-adrenal auto-antibodies (AA) have come into use in the 100 years since Addison's death. Following the methodological innovations, 4 disorders which share impaired response to corticotropin in common have been discovered (i.e., partial AD, apigmented adrenal insufficiency [AI], subclinical AI, and the AA-positive state exclusively in subjects proven to have an impaired response to corticotropin). As they are hidden, potentially serious conditions, these disorders are bound together as latent AI (LAI). Diagnosis of AD is often delayed, which may lead to adrenal crisis. If LAI were widely recognized, such delays would not exist and crises would be averted. The 3 existing guidelines do not refer much to LAI patients outside those in acute situations. To address this, information relevant to clinical manifestations and diagnostic tests of LAI was sought in the literature. Signs and symptoms that are useful clues to begin a diagnostic workup are presented for endocrinologists to identify patients with suspected LAI. The utility of 2 corticotropin test protocols is reviewed. To endorse LAI shown by the corticotropin test, monitoring items following corticosteroid supplementation are cited from the guidelines and supplemented with the author's observations. ABBREVIATIONS AA = anti-adrenal auto-antibodies; Ab = antibodies; ACA = AA detected by immunofluorescence; ACTH = adrenocorticotropic hormone; AD = Addison disease; AI = adrenal insufficiency; DHEA = dehydroepiandrosterone; GC = glucocorticoid; IFA = immunofluorescence assay; LAI = latent AI; LDT = low-dose test; MC = mineralocorticoid; 21OHAb = anti-21-hydroxylase Ab; ST = standard test; URI = upper respiratory infection.
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Ramachandran R, Alaghband-Zadeh J, Sankaralingam A, Khan SA, Tavabie M, Fernyhough C, Sabry M, Maghsoodi N, McGowan B, Carroll PV, Wierzbicki AS. Suboptimal rise in awakening-induced cortisol is an accurate marker of cortisol insufficiency in patients with normal renal function (eGFR >60 mL/min). Ann Clin Biochem 2017; 55:496-499. [PMID: 28853294 DOI: 10.1177/0004563217732361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background The insulin tolerance test is the gold standard for diagnosis of cortisol insufficiency. However, it is cumbersome, invasive, requires supervised hospital facilities and has unpleasant side-effects. A non-invasive outpatient-based test will be useful. We hypothesized that free cortisol concentrations in multiple spot urine samples can be used to diagnose cortisol insufficiency in patients with normal renal function (eGFR > 60 mL/min). Method Patients and controls provided urine samples at bedtime (S1), and first (S2) and second (S3) void the next day. Cortisol and creatinine were measured in all three samples, and cortisol:creatinine ratio (S1, S2 and S3) was used for further analysis. The sum of S1 + S2 + S3 was used to calculate total cortisol secretion (T). Variation (V) in cortisol secretion in response to circadian rhythm was calculated as the modulus of the difference between S1 and S2 and S2 and S3. Results Samples were collected from 96 controls and 11 patients. S1 was significantly lower vs . S2 and S3 in controls ( P < 0.0001) but not in patients. S2, S3, T and V were significantly lower in patients vs . controls ( P < 0.0001). ROC curve analysis using insulin tolerance test as gold standard showed that S2, S3, T and V were all equally accurate diagnostic markers for cortisol insufficiency (AUC: 0.87, NPV: 100%). The best balance of sensitivity and specificity was achieved using T (sensitivity: 100%, specificity: 58%). Conclusion Multiple spot urine samples test is an accurate, relatively inexpensive, non-invasive, convenient outpatient-based screening test for exclusion of cortisol insufficiency.
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Affiliation(s)
- Radha Ramachandran
- 1 King's College London, London, UK.,2 Departments of Endocrinology/Metabolic Medicine/Chemical Pathology, Guy's and St Thomas' Hospitals, NHS Foundation Trust, London, UK
| | | | - Arun Sankaralingam
- 2 Departments of Endocrinology/Metabolic Medicine/Chemical Pathology, Guy's and St Thomas' Hospitals, NHS Foundation Trust, London, UK
| | | | | | | | | | - Negar Maghsoodi
- 1 King's College London, London, UK.,2 Departments of Endocrinology/Metabolic Medicine/Chemical Pathology, Guy's and St Thomas' Hospitals, NHS Foundation Trust, London, UK
| | - Barbara McGowan
- 1 King's College London, London, UK.,2 Departments of Endocrinology/Metabolic Medicine/Chemical Pathology, Guy's and St Thomas' Hospitals, NHS Foundation Trust, London, UK
| | - Paul V Carroll
- 1 King's College London, London, UK.,2 Departments of Endocrinology/Metabolic Medicine/Chemical Pathology, Guy's and St Thomas' Hospitals, NHS Foundation Trust, London, UK
| | - Anthony S Wierzbicki
- 1 King's College London, London, UK.,2 Departments of Endocrinology/Metabolic Medicine/Chemical Pathology, Guy's and St Thomas' Hospitals, NHS Foundation Trust, London, UK
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Williams KM, Fazzio P, Oberfield SE, Gallagher MP, Aranoff GS. Cortisol Levels in Children With Diabetic Ketoacidosis Associated With New-Onset Type 1 Diabetes Mellitus. Clin Pediatr (Phila) 2017; 56:117-122. [PMID: 28145127 PMCID: PMC5310834 DOI: 10.1177/0009922816684595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
There is little data documenting cortisol levels in children with diabetic ketoacidosis (DKA), despite the fact that untreated adrenal insufficiency (AI) could worsen the outcome of DKA. In this cross-sectional study, we assessed serum cortisol levels in 28 children with DKA and new onset type 1 diabetes mellitus evaluated at our center over a 5-year period. Average duration of diabetes-related symptoms was positively associated with age ( P = .002), and significantly lower hemoglobin A1c levels were observed in the youngest children. The mean cortisol level was 40.9 µg/dL, with a range of 7.8 to 119 µg/dL. Cortisol levels were found to be inversely associated with serum pH ( P = .007). There was no difference in the clinical outcome of the 4 patients who had cortisol levels less than 18 µg/dL. Overall, we did not find clinical or laboratory evidence of diminished cortisol reserve; however, the possibility of AI must be kept in mind when treating children with DKA.
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Affiliation(s)
| | - Pamela Fazzio
- Columbia University Medical Center, New York, NY, USA,Children’s Hospital of Philadelphia, Philadelphia, PA
| | | | - Mary P. Gallagher
- Columbia University Medical Center, New York, NY, USA,New York University School of Medicine, New York, New York
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Agha-Hosseini F, Shirzad N, Moosavi MS. The association of elevated plasma cortisol and Hashimoto's Thyroiditis, a neglected part of immune response. Acta Clin Belg 2016; 71:81-5. [PMID: 27075805 DOI: 10.1080/17843286.2015.1116152] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
INTRODUCTION Currently, Hashimoto Thyroiditis (HT) is the most common autoimmune disease and its prevalence is reported to be about twice that of Type 1 diabetes. Any disturbances in the immune tolerance system may cause autoimmune diseases. Discovering the underlying immune disturbances in HT not only improves our knowledge of its aetiopathology, but may also provide opportunities for appropriate management and preventing further immunological biases. PATIENTS AND METHODS Forty women diagnosed with HT were enrolled in this study. After the subjects had sat quietly for 30-40 min, blood samples were taken between 08:00 and 09:00 am. Cortisol, autoantibodies and TSH were measured by ELISA test. RESULTS There were no significant differences in terms of age, BMI or number of menopause women between HT patients and normal group. Cortisol was significantly higher in the HT group. The adjusted odds ratio for increased probability of HT for 1 ng increase in cortisol value was 19%. DISCUSSION After matching age and menopause status, cortisol was higher in the HT group. The Th2 immune response due to cortisol may have a protective role in certain types of autoimmunity. The presence of immunoreactive corticotropin-releasing hormone in thyroid lesions, predominantly in those related to autoimmune disorders may support hyperproduction of cortisol in HT. CONCLUSION Glucocorticoids downregulate the immune system and are known as one of the major immunosuppressant factors. In this study, there was increased cortisol level in HT patients.
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Yamamoto T. Comorbid Latent Adrenal Insufficiency with Autoimmune Thyroid Disease. Eur Thyroid J 2015; 4:201-6. [PMID: 26558238 PMCID: PMC4637507 DOI: 10.1159/000433532] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 05/22/2015] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Autoimmune thyroid disease (ATD) has been occasionally observed in patients with primary adrenal insufficiency (PAI). In contrast, less than 20 cases of comorbid PAI with ATD have been found in the English literature. One conceivable reason is difficulty in detecting latent PAI. OBJECTIVE Information of clinical presentation and diagnostics is sought to facilitate diagnosis of latent PAI. METHODS Latent PAI was pursued in 11 patients among 159 ATD patients. All of them were maintained in a euthyroid state. Except for one patient with nonrheumatic musculoskeletal symptoms, the other patients, who were asymptomatic in their daily lives, presented with recurrent nonspecific gastrointestinal symptoms or fatigue in stress-associated circumstances. Morning cortisol level <303 nmol/l was used as an inclusion criterion. Their basal adrenocorticotropic hormone levels were normal. The adrenal status was examined by a provocation test, either an insulin-induced hypoglycemia test or a 1-μg intravenous corticotrophin test. Eleven patients showed subnormal cortisol response. They were supplemented with hydrocortisone of doses ≤15 mg/day. After a few months of supplementation, PAI was confirmed by another provocation test. Three patients were excluded because of dissociation of two provocation tests. RESULTS Comorbid latent PAI with ATD was pursued from the symptoms stated above and proven by two provocation tests; it was found in 5% (8/159) of the patients. CONCLUSION When patients with ATD are troubled by recurrent stress-associated gastrointestinal or constitutional symptoms or nonrheumatic musculoskeletal symptoms which have remained unrelieved by adjustment of thyroid medication, these symptoms may be a manifestation of comorbid latent PAI. It is worth investigating such patients for latent PAI.
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Ross IL, Levitt NS. Diagnosis and management of Addison's disease: insights gained from a large South African cohort. JOURNAL OF ENDOCRINOLOGY METABOLISM AND DIABETES OF SOUTH AFRICA 2014. [DOI: 10.1080/22201009.2011.10872256] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- IL Ross
- Division of Endocrinology, University of Cape Town
| | - NS Levitt
- Division of Endocrinology, University of Cape Town
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Yamamoto T. History of stress-related health changes: a cue to pursue a diagnosis of latent primary adrenal insufficiency. Intern Med 2014; 53:183-8. [PMID: 24492685 DOI: 10.2169/internalmedicine.53.1156] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
OBJECTIVE Routine delays in the diagnosis of primary adrenal insufficiency (PAI) are well known and conceivably attributable to the absence of cues, other than anti-adrenal autoantibodies, to pursue subclinical PAI. Subclinical PAI is latent unless the afflicted patient encounters stress such as an acute illness, surgery, psychosocial burden, etc. It remains to be demonstrated whether a history of stress-related health changes is a useful cue to pursue a diagnosis of latent PAI. METHODS The patients were selected for a history of recurrent symptoms, i.e., gastrointestinal symptoms, fatigue, or lassitude, aggravated by stress and alleviated by the removal of stress, and signs, i.e., weight loss, hypotension, and hyperpigmentation. As the early morning cortisol levels were low or low-normal and the adrenocorticotropic hormone (ACTH) levels were within the reference ranges, provocation tests, i.e., insulin-induced hypoglycemia tests and low-dose (1 μg) corticotropin tests (LDTs), were used to estimate the hypothalamus-pituitary-adrenal (HPA) axis status. Patients with the HPA axis dysfunction on two provocation tests were supplemented with physiologic doses of glucocorticoids (GCs). The effects of GC supplementation on stress-related health changes were observed. RESULTS The ACTH levels after insulin-induced hypoglycemia were higher and the cortisol levels were lower in the patients than in the control subjects. The cortisol levels in the patients were increased less significantly by LDT than those observed in the control subjects. Stress-related health changes ceased to recur and signs, i.e., a low body weight, hypotension, and hyperpigmentation, were ameliorated following GC supplementation. CONCLUSION A history of stress-related health changes is useful as a cue to pursue latent PAI in patients with low or low-normal early morning cortisol levels.
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Gaete X, Iñiguez G, Linares J, Avila A, Mericq V. Cortisol hyporesponsiveness to the low dose ACTH test is a frequent finding in a pediatric population with type 1 diabetes mellitus. Pediatr Diabetes 2013; 14:429-34. [PMID: 23490274 DOI: 10.1111/pedi.12021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 12/06/2012] [Accepted: 01/04/2013] [Indexed: 11/29/2022] Open
Abstract
INTRODUCTION In adults with type 1 diabetes mellitus (DM1), a 25% of risk of hypocortisolism has been found through a low dose ACTH test with negative antibodies suggesting other causes of hypothalamic-pituitary-adrenal axis dysfunction. AIM To evaluate adrenal function in pediatric patients with DM1 and correlate the results with the frequency of hypoglycemia and metabolic control. METHODS Sixty-nine patients were enrolled, age 12.3 (5.7-18.1); 50 boys and 19 girls. A 20% had additional autoimmune diseases. Mean hemoglobin A1c (HbA1c) was 8.1% and insulin dose was 1.14 U/kg/d. After an overnight fast, a low dose ACTH test (1 µg) was performed. Basal and stimulated cortisol concentrations, DHEAS, and plasma renin activity (PRA) were measured. A cortisol response post-ACTH below 18 µg/dL was considered abnormal. RESULTS 58% of the tested patients had an abnormal response to ACTH test. These patients also had lower DHEAS concentrations, but were not different in diabetes duration, HbA1C, severe hypoglycemia, ACTH, or PRA concentrations compared to those who had a normal cortisol post-ACTH. One patient out of 59, had a positive anti-21-hydroxylase antibody (21OHA) and presented a poor response to ACTH. CONCLUSIONS We found a significant proportion of our patients having a subnormal cortisol response independent of the presence of anti-adrenal cell antibodies. We did not find a correlation with metabolic control, probably due to the good metabolic control of this group. The absence of 21OHA does not rule out subclinical hypocortisolism in this population. Our results suggest testing adrenal function in children with DM1.
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Affiliation(s)
- X Gaete
- Institute of Maternal and Child Research, Pediatric Endocrinology unit, Faculty of Medicine, University of Chile, Santiago, Chile
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Baker PR, Nanduri P, Gottlieb PA, Yu L, Klingensmith GJ, Eisenbarth GS, Barker JM. Predicting the onset of Addison's disease: ACTH, renin, cortisol and 21-hydroxylase autoantibodies. Clin Endocrinol (Oxf) 2012; 76:617-24. [PMID: 22066755 PMCID: PMC4963152 DOI: 10.1111/j.1365-2265.2011.04276.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
CONTEXT Autoantibodies to 21-hydroxylase (21OH-AA) precede onset of autoimmune Addison's disease (AD). Progression to AD can take months to years, and early detection of metabolic decompensation may prevent morbidity and mortality. OBJECTIVE To define optimal methods of predicting progression to overt AD (defined by subnormal peak cortisol response to Cosyntropin) in 21OH-AA+ individuals. DESIGN, SETTING AND PARTICIPANTS Individuals were screened for 21OH-AA at the Barbara Davis Center from 1993 to 2011. Subjects positive for 21OH-AA (n = 87) were tested, and the majority prospectively followed for the development of Addison's disease, including seven diagnosed with AD upon 21OH-AA discovery (discovered), seven who progressed to AD (progressors) and 73 nonprogressors. MAIN OUTCOME MEASURED Plasma renin activity (PRA), ACTH, baseline cortisol, peak cortisol and 21OH-AA were measured at various time points relative to diagnosis of AD or last AD-free follow-up. RESULTS Compared with nonprogressors, in the time period 2 months-2 years prior to the onset of AD, progressors were significantly more likely to have elevated ACTH (11-22 pM, P < 1E-4), with no significant differences in mean PRA (P = 0·07) or baseline cortisol (P = 0·08), and significant but less distinct differences seen with 21OH-AA levels (P < 1E-4) and poststimulation cortisol levels (P = 6E-3). CONCLUSION Moderately elevated ACTH is a more useful early indicator of impending AD than 21OH-AA, PRA or peak cortisol, in the 2 months-2 years preceding the onset of AD.
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Affiliation(s)
- Peter R. Baker
- Barbara Davis Center for Childhood Diabetes, University of Colorado Denver, Aurora, CO, USA
| | - Priyaanka Nanduri
- Barbara Davis Center for Childhood Diabetes, University of Colorado Denver, Aurora, CO, USA
| | - Peter A. Gottlieb
- Barbara Davis Center for Childhood Diabetes, University of Colorado Denver, Aurora, CO, USA
| | - Liping Yu
- Barbara Davis Center for Childhood Diabetes, University of Colorado Denver, Aurora, CO, USA
| | | | - George S. Eisenbarth
- Barbara Davis Center for Childhood Diabetes, University of Colorado Denver, Aurora, CO, USA
| | - Jennifer M. Barker
- Department of Pediatric Endocrinology, University of Colorado Denver, Aurora, CO, USA
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Simunkova K, Hampl R, Hill M, Kriz L, Hrda P, Janickova-Zdarska D, Zamrazil V, Vrbikova J, Vondra K. Adrenocortical function in young adults with diabetes mellitus type 1. J Steroid Biochem Mol Biol 2010; 122:35-41. [PMID: 20433924 DOI: 10.1016/j.jsbmb.2010.04.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2009] [Revised: 04/06/2010] [Accepted: 04/19/2010] [Indexed: 10/19/2022]
Abstract
In 75 young adults with diabetes mellitus type 1 (DM 1) we have performed a cross-sectional study to gain more information about their adrenocortical function. We have found in a surprisingly large portion of patients (25%) a subnormal response (<500 nmol/L, low responders) of the serum cortisol during low-dose Synacthen test, accompanied by significantly decreased stimulated values of aldosterone and salivary cortisol. Basal serum cortisol, aldosterone, and dehydroepiandrosterone sulphate (in women only) were significantly reduced in low responders as well, while ACTH, cortisol binding globulin, plasma renin activity, urinary free cortisol/24h, and salivary cortisol did not differ. The results indicate that the disorder of adrenocortical function in low responders occurs in all adrenocortical zones. The patients with the highest risk in respect to revealed hypocorticalism were DM 1 with autoimmune thyroiditis, 13 out of 36 in contrast to 5 out of 39 suffered from isolated form of DM 1, with onset around 30 years, independently on sex. The biorhythm of salivary cortisol in low responders under real-life conditions did not significantly differ from normal responders, except of the decreased values in the morning. Antibodies against 21-hydroxylase and adrenal cortex were negative in the entire group of diabetics studied. In conclusion, this is the first study to demonstrate in as much as 25% of young adults with DM 1 patients without any signs of adrenal autoimmunity decreased both basal and stimulated serum cortisol and aldosterone levels, implying existence of subclinical primary hypocorticalism.
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Affiliation(s)
- Katerina Simunkova
- Institute of Endocrinology, Narodni trida 8, 116 94 Prague, Czech Republic.
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Nascif SO, Molica P, Correa-Silva SR, Silva MR, Lengyel AMJ. Ghrelin and GHRP-6-induced ACTH and cortisol release in thyrotoxicosis. Pituitary 2009; 12:315-21. [PMID: 19396632 DOI: 10.1007/s11102-009-0181-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2008] [Accepted: 04/14/2009] [Indexed: 11/29/2022]
Abstract
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 (microg/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 Delta AUC cortisol values (microg/dl.90 min) after ghrelin (484 +/- 80) and GHRP-6 (115 +/- 63) were similar to controls (ghrelin: 524 +/- 107; GHRP-6: 192 +/- 73). A significant increase in Delta AUC ACTH (pg/ml x 90 min) after ghrelin was observed in thyrotoxicosis (4,189 +/- 1,202) compared to controls (1,499 +/- 338). Delta AUC ACTH values after GHRP-6 were also higher, although not significantly (patients: 927 +/- 330; controls: 539 +/- 237). In summary, our results suggest that ghrelin-mediated pathways of ACTH release might be activated by thyroid hormone excess, but adrenocortical reserve is maintained.
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Affiliation(s)
- Sergio Oliva Nascif
- Division of Endocrinology, Federal University of São Paulo, UNIFESP/EPM, Pedro de Toledo Street, 910, São Paulo, SP, 04039-002, Brazil,
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