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20. Vik-Mo EO, Øksnes M, Pedersen PH, Wentzel-Larsen T, Rødahl E, Thorsen F, Schreiner T, Aanderud S, Lund-Johansen M: Gamma knife stereotactic radiosurgery of Nelson syndrome. Eur J Endocrinol; 2009 Feb;160(2):143-8
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  • [Source] The source of this record is MEDLINE®, a database of the U.S. National Library of Medicine.
  • OBJECTIVE: Gamma knife radiosurgery (GKR) can be used as primary or adjuvant therapy for the treatment of an ACTH-producing pituitary tumor after bilateral adrenalectomy, called Nelson syndrome (NS).
  • We have examined the effect of GKR on tumor growth and ACTH-hypersecretion, and characterized the adverse events of this treatment in patients with NS.
  • RESULTS: Tumor growth was stopped in all patients.
  • The ACTH levels declined in eight patients, and normalized in one patient.
  • There was a significant drop in ACTH levels, with a half-time of 2.8 years.
  • The substitution therapy of three pituitary axes present at GKR treatment could be stopped during the same period.
  • As the radiation level was below 1Gy to this area, it is unlikely that the GKR treatment itself induced the malignant tumor.

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  • (PMID = 18996962.001).
  • [ISSN] 1479-683X
  • [Journal-full-title] European journal of endocrinology
  • [ISO-abbreviation] Eur. J. Endocrinol.
  • [Language] ENG
  • [Publication-type] Journal Article; Research Support, Non-U.S. Gov't
  • [Publication-country] England
  • [Chemical-registry-number] 9002-60-2 / Adrenocorticotropic Hormone
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4. Martínez-Fuentes AJ, Moreno-Fernández J, Vázquez-Martínez R, Durán-Prado M, de la Riva A, Tena-Sempere M, Diéguez C, Jiménez-Reina L, Webb SM, Pumar A, Leal-Cerro A, Benito-López P, Malagón MM, Castaño JP: Ghrelin is produced by and directly activates corticotrope cells from adrenocorticotropin-secreting adenomas. J Clin Endocrinol Metab; 2006 Jun;91(6):2225-31
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  • [Source] The source of this record is MEDLINE®, a database of the U.S. National Library of Medicine.
  • [Title] Ghrelin is produced by and directly activates corticotrope cells from adrenocorticotropin-secreting adenomas.
  • CONTEXT: In Cushing's disease, ACTH hypersecretion by pituitary corticotrope adenoma cells and resulting hypercortisolism is accompanied by a severely blunted GH secretory response.
  • Interestingly, in Cushing's disease, ghrelin markedly increases plasma ACTH, whereas its stimulatory action on GH secretion is reduced.
  • Although the reported expression of ghrelin receptors (GHS-R) in corticotrope tumors offers a potential mechanism for ghrelin-induced ACTH hypersecretion, studies on the direct effects of synthetic GH secretagogues on corticotropinoma cells offered contradictory results.
  • Importantly, double immunogold electron microscopy revealed that ghrelin is costored within ACTH secretory vesicles in densely granulated adenomatous corticotropes.
  • CONCLUSIONS: These results constitute the first demonstration that ghrelin acts directly on corticotrope tumor cells derived from patients with Cushing's disease.
  • The presence of ghrelin and GHS-R suggests that pituitary ghrelin may play an autocrine/paracrine role in regulating ACTH release in Cushing's disease.
  • Our findings provide a plausible cellular basis for the exaggerated ACTH response to ghrelin in Cushing's disease and suggest novel research strategies to develop medical treatments for this disease.
  • [MeSH-major] Adenoma / secretion. Adrenocorticotropic Hormone / secretion. Peptide Hormones / physiology. Pituitary Neoplasms / secretion

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  • (PMID = 16551736.001).
  • [ISSN] 0021-972X
  • [Journal-full-title] The Journal of clinical endocrinology and metabolism
  • [ISO-abbreviation] J. Clin. Endocrinol. Metab.
  • [Language] eng
  • [Publication-type] Case Reports; Journal Article; Research Support, Non-U.S. Gov't
  • [Publication-country] United States
  • [Chemical-registry-number] 0 / Ghrelin; 0 / Peptide Hormones; 0 / RNA, Messenger; 0 / Receptors, G-Protein-Coupled; 0 / Receptors, Ghrelin; 66796-54-1 / Pro-Opiomelanocortin; 9002-60-2 / Adrenocorticotropic Hormone; SY7Q814VUP / Calcium
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25. Amaral FC, Torres N, Saggioro F, Neder L, Machado HR, Silva WA Jr, Moreira AC, Castro M: MicroRNAs differentially expressed in ACTH-secreting pituitary tumors. J Clin Endocrinol Metab; 2009 Jan;94(1):320-3
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  • [Source] The source of this record is MEDLINE®, a database of the U.S. National Library of Medicine.
  • [Title] MicroRNAs differentially expressed in ACTH-secreting pituitary tumors.
  • OBJECTIVE: The aim of the study was to analyze the differential expression of let-7a, miR-15a, miR-16, miR-21, miR-141, miR-143, miR-145, and miR-150 in corticotropinomas and normal pituitary tissue and verify whether their profile of expression correlates with tumor size or remission after treatment.
  • MATERIAL AND METHODS: ACTH-secreting pituitary tumor samples were obtained during transphenoidal surgery from patients with Cushing disease and normal pituitary tissues from autopsies.
  • RESULTS: We found underexpression of miR-145 (2.0-fold; P = 0.04), miR-21 (2.4-fold; P = 0.004), miR-141 (2.6-fold; P = 0.02), let-7a (3.3-fold; P = 0.003), miR-150 (3.8-fold; P = 0.04), miR-15a (4.5-fold; P = 0.03), miR-16 (5.0-fold; P = 0.004), and miR-143 (6.4-fold; P = 0.004) in ACTH-secreting pituitary tumors when compared to normal pituitary tissues.
  • There were no differences between miRNA expression and tumor size as well as miRNA expression and ratio of remission after surgery, except in patients presenting lower miR-141 expression who showed a better chance of remission.
  • [MeSH-major] ACTH-Secreting Pituitary Adenoma / genetics. Adenoma / genetics. MicroRNAs / analysis
  • [MeSH-minor] Adolescent. Adult. Female. Humans. Male. Middle Aged. Pituitary ACTH Hypersecretion / genetics. Young Adult

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  • (PMID = 18840638.001).
  • [ISSN] 0021-972X
  • [Journal-full-title] The Journal of clinical endocrinology and metabolism
  • [ISO-abbreviation] J. Clin. Endocrinol. Metab.
  • [Language] eng
  • [Publication-type] Journal Article; Research Support, Non-U.S. Gov't
  • [Publication-country] United States
  • [Chemical-registry-number] 0 / MicroRNAs
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26. Batista D, Courkoutsakis NA, Oldfield EH, Griffin KJ, Keil M, Patronas NJ, Stratakis CA: Detection of adrenocorticotropin-secreting pituitary adenomas by magnetic resonance imaging in children and adolescents with cushing disease. J Clin Endocrinol Metab; 2005 Sep;90(9):5134-40
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  • [Source] The source of this record is MEDLINE®, a database of the U.S. National Library of Medicine.
  • [Title] Detection of adrenocorticotropin-secreting pituitary adenomas by magnetic resonance imaging in children and adolescents with cushing disease.
  • CONTEXT: We recently showed that pre- and postcontrast spoiled gradient-recalled acquisition in the steady-state (SPGR) was superior to conventional pre- and postcontrast T-1 weighted spin echo (SE) acquisition magnetic resonance imaging (MRI) for the diagnostic evaluation of pituitary tumors in adult patients.
  • OBJECTIVE: The present investigation assessed the use of SPGR vs. SE-MRI in the diagnostic evaluation of ACTH-secreting tumors in children and adolescents with Cushing disease.
  • Postcontrast SPGR-MRI identified the location of the tumor in 18 of 28 patients, whereas postcontrast SE-MRI identified the location and accurately estimated the size of the tumor in only five patients (P < 0.001).
  • CONCLUSIONS: We conclude that conventional MRI, even with contrast enhancement, mostly failed to identify ACTH-secreting microadenomas in children and adolescents with Cushing disease.
  • Postcontrast SPGR-MRI was superior to SE-MRI and should be used in addition to conventional SE-MRI in the pituitary evaluation of children and adolescents with suspected Cushing disease.
  • [MeSH-major] Adenoma / diagnosis. Adenoma / secretion. Adrenocorticotropic Hormone / secretion. Cushing Syndrome / diagnosis. Magnetic Resonance Imaging. Pituitary Neoplasms / diagnosis. Pituitary Neoplasms / secretion

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  • (PMID = 15941871.001).
  • [ISSN] 0021-972X
  • [Journal-full-title] The Journal of clinical endocrinology and metabolism
  • [ISO-abbreviation] J. Clin. Endocrinol. Metab.
  • [Language] eng
  • [Publication-type] Evaluation Studies; Journal Article
  • [Publication-country] United States
  • [Chemical-registry-number] 9002-60-2 / Adrenocorticotropic Hormone
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27. Illouz F, Dubois-Ginouves S, Laboureau S, Rohmer V, Rodien P: [Use of cabergoline in persisting Cushing's disease]. Ann Endocrinol (Paris); 2006 Sep;67(4):353-6
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  • [Source] The source of this record is MEDLINE®, a database of the U.S. National Library of Medicine.
  • [Transliterated title] Utilisation de la cabergoline dans la maladie de Cushing non contrôlée.
  • Cabergoline is a dopaminergic agonist with demonstrated efficiency of for the treatment of prolactin-secreting pituitary tumors.
  • We describe the use of cabergoline in three patients with Cushing's disease, one of them presenting a silent ACTH-secreting pituitary tumor.
  • We describe a decrease or a normalization in hypercortisolism; for one of the subjects, tumor growth seemed to be stopped.
  • While cabergoline can induce a suppression of cortisol secretion or a corticotroph tumor shrinkage, the sites of action remain unclear.
  • [MeSH-major] Adrenocortical Hyperfunction / drug therapy. Ergolines / therapeutic use. Pituitary ACTH Hypersecretion / diagnosis

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  • (PMID = 17072242.001).
  • [ISSN] 0003-4266
  • [Journal-full-title] Annales d'endocrinologie
  • [ISO-abbreviation] Ann. Endocrinol. (Paris)
  • [Language] fre
  • [Publication-type] Case Reports; English Abstract; Journal Article
  • [Publication-country] France
  • [Chemical-registry-number] 0 / Dopamine Agonists; 0 / Ergolines; LL60K9J05T / cabergoline; WI4X0X7BPJ / Hydrocortisone
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