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Pituitary

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https://www.readbyqxmd.com/read/27900635/somatostatin-and-dopamine-receptor-regulation-of-pituitary-somatotroph-adenomas
#1
REVIEW
Anat Ben-Shlomo, Ning-Ai Liu, Shlomo Melmed
Somatostatin and dopamine receptors are expressed in normal and tumoral somatotroph cells. Upon receptor stimulation, somatostatin and the somatostatin receptor ligands octreotide, lanreotide, and pasireotide, and to a lesser extent, dopamine and the dopamine analogs bromocriptine and cabergoline, suppress growth hormone (GH) secretion from a GH-secreting pituitary somatotroph adenoma. Somatostatin and dopamine receptors are Gαi-protein coupled that inhibit adenylate cyclase activity and cAMP production and reduce intracellular calcium concentration and calcium flux oscillations...
November 29, 2016: Pituitary
https://www.readbyqxmd.com/read/27900634/socs2-polymorphisms-are-not-associated-with-clinical-and-biochemical-phenotypes-in-acromegalic-patients
#2
Ericka B Trarbach, Alexander A Jorge, Felipe H Duarte, Marcello D Bronstein, Raquel S Jallad
PURPOSE: Suppressor of cytokine signaling 2 (SOCS2) is a STAT5b-regulated gene and one of its functions is to influence growth and development through negative regulatory effects on GH/IGF-1 pathway. So, we evaluate the potential influence of SOCS2 single nucleotide polymorphisms (SNPs) on clinical and laboratorial characteristics of a large cohort of Brazilian patients with acromegaly. METHODS: Four SOCS2 SNPs (rs3782415, rs3816997, rs3825199 and rs11107116) were selected and genotyped by real-time PCR using specific Taqman probe assays...
November 29, 2016: Pituitary
https://www.readbyqxmd.com/read/27896569/anti-pituitary-antibodies-against-corticotrophs-in-igg4-related-hypophysitis
#3
Naoko Iwata, Shintaro Iwama, Yoshihisa Sugimura, Yoshinori Yasuda, Kohtaro Nakashima, Seiji Takeuchi, Daisuke Hagiwara, Yoshihiro Ito, Hidetaka Suga, Motomitsu Goto, Ryoichi Banno, Patrizio Caturegli, Teruhiko Koike, Yoshiharu Oshida, Hiroshi Arima
PURPOSE: IgG4-related disease is a systemic inflammatory disease characterized by infiltration of IgG4-positive plasma cells into multiple organs, including the pituitary gland. Autoimmunity is thought to be involved in the pathogenesis of IgG4-related disease. The diagnosis of IgG4-related hypophysitis (IgG4-RH) is difficult because its clinical features, such as pituitary swelling and hypopituitarism, are similar to those of other pituitary diseases, including lymphocytic hypophysitis and sellar/suprasellar tumors...
November 28, 2016: Pituitary
https://www.readbyqxmd.com/read/27873156/erratum-to-predictive-role-of-dynamic-contrast-enhanced-t1-weighted-mr-sequences-in-pre-surgical-evaluation-of-macroadenomas-consistency
#4
Andrea Romano, Valeria Coppola, Mariangela Lombardi, Luigi Lavorato, Domenica Di Stefano, Emanuela Caroli, Maria Camilla Rossi Espagnet, Francesca Tavanti, Giuseppe Minniti, Giuseppe Trillò, Alessandro Bozzao
No abstract text is available yet for this article.
November 21, 2016: Pituitary
https://www.readbyqxmd.com/read/27853917/benzene-and-2-ethyl-phthalate-induce-proliferation-in-normal-rat-pituitary-cells
#5
Laura Tapella, Antonella Sesta, Maria Francesca Cassarino, Valentina Zunino, Maria Graziella Catalano, Francesca Pecori Giraldi
PURPOSE: Endocrine disruptors are known to modulate a variety of endocrine functions and increase the risk for neoplasia. Epidemiological data reported increased prevalence of pituitary tumors in high industrial areas while genotyping studies showed that mutations in the aryl hydrocarbon receptor (AhR) interacting protein (AIP)-chaperone to the dioxin ligand AhR-gene are linked to predisposition to pituitary tumor development. Aim of the present study was to establish whether endocrine pollutants can induce cell proliferation in normal rat pituitary cells...
November 16, 2016: Pituitary
https://www.readbyqxmd.com/read/27848079/cabergoline-and-prolactinomas-lack-of-association-between-drd2-polymorphisms-and-response-to-treatment
#6
Cbf Bueno, E B Trarbach, M D Bronstein, A Glezer
BACKGROUND: About 80% of prolactinomas respond to dopamine agonists (DA) with hormonal normalization and tumor shrinkage. Mechanisms of DA resistance include reduction of dopamine receptor subtype 2 (DRD2) expression, short and long isoform ratio and post-receptor mechanisms. It was suggested that polymorphisms in the gene encoding dopamine receptor subtype 2 gene (DRD2) could be associated with variable effectiveness of cabergoline (CAB). OBJECTIVE: To assess the influence of DRD2 polymorphisms in responsiveness of CAB treatment in patients with prolactinoma...
November 15, 2016: Pituitary
https://www.readbyqxmd.com/read/27837386/cholesterol-granulomas-presenting-as-sellar-masses-a-similar-but-clinically-distinct-entity-from-craniopharyngioma-and-rathke-s-cleft-cyst
#7
Raúl A Hernández-Estrada, Varun R Kshettry, Ashley N Vogel, Mark T Curtis, James J Evans
PURPOSE: Cholesterol granulomas in the sella are rare and can mimic the appearance of craniopharyngioma or Rathke's cleft cysts. Information regarding the clinical presentation, imaging characteristics, and clinical course of sellar cholesterol granulomas can help clinicians to differentiate these lesions from other sellar cystic lesions. METHODS: We present three cases of sellar cholesterol granulomas. A literature review was performed for all cases of sellar cholesterol granulomas with individual patient data reported...
November 11, 2016: Pituitary
https://www.readbyqxmd.com/read/27812777/acromegaly-clinical-features-at-diagnosis
#8
REVIEW
Lucio Vilar, Clarice Freitas Vilar, Ruy Lyra, Raissa Lyra, Luciana A Naves
BACKGROUND: Acromegaly is a rare and underdiagnosed disorder caused, in more than 95% of cases, by a growth hormone (GH)-secreting pituitary adenoma. The GH hypersecretion leads to overproduction of insulin-like growth factor 1 (IGF-1) which results in a multisystem disease characterized by somatic overgrowth, multiple comorbidities, physical disfigurement, and increased mortality. OBJECTIVE: This article aims to review the clinical features of acromegaly at diagnosis...
November 3, 2016: Pituitary
https://www.readbyqxmd.com/read/27812776/critical-review-of-igg4-related-hypophysitis
#9
Junpei Shikuma, Kenshi Kan, Rokuro Ito, Kazuo Hara, Hiroyuki Sakai, Takashi Miwa, Akira Kanazawa, Masato Odawara
PURPOSE: IgG4-related hypophysitis is a rare disease, with only 34 cases published in English (2015). Available short reviews may not present complete details of IgG4-related hypophysitis. We aimed to survey case reports of IgG4-related hypophysitis, including abstracts of scientific meetings, in English and Japanese. METHODS: We searched for information about IgG4-related hypophysitis in PubMed and Igakuchuozasshi (Japan Medical Abstracts Society). Among 104 case reports found, we reviewed 84 fulfilling Leporati's diagnostic criteria...
November 3, 2016: Pituitary
https://www.readbyqxmd.com/read/27798757/chordoid-glioma-a-new-paradigm-of-hypothalamic-dysfunction
#10
LETTER
Inés Castro-Dufourny, Rodrigo Carrasco, José M Pascual
No abstract text is available yet for this article.
October 31, 2016: Pituitary
https://www.readbyqxmd.com/read/27796709/effects-of-somatostatin-and-its-analogues-on-progenitor-mesenchymal-cells-isolated-from-human-pituitary-adenomas
#11
Monia Orciani, Miriam Caffarini, Giulia Sorgentoni, Riccardo Antonio Ricciuti, Giorgio Arnaldi, Roberto Di Primio
PURPOSE: Progenitor mesenchymal cells (PMCs) have been found also in epithelial tumors and may derive from cancer stem cells (CSCs) by EMT mechanism. In this scenario, the effects of traditionally drugs on PMCs become of primary concern for therapeutic approaches. Previously, we isolated PMCs from acromegalic (GHomas) and not-functioning pituitary adenomas (NFPAs). Here we evaluate: (1) the role of EMT on their origin; (2) the presence of the somatostatin receptors (SSTR1-5); (3) the effects of somatostatin (SST) and its analogues (SSAs) on PMCs proliferation, apoptosis and SSTR1-5 expression...
October 28, 2016: Pituitary
https://www.readbyqxmd.com/read/27783196/management-of-prolactinomas-a-survey-of-physicians-from-the-middle-east-and-north-africa
#12
Salem A Beshyah, Ibrahim H Sherif, Farida Chentli, Amir Hamrahian, Aly B Khalil, Hussein Raef, Mohamed El-Fikki, Selim Jambart
BACKGROUND: Prolactinomas are the commonest functional tumors of the pituitary gland. There are still controversies regarding medical therapy in specific clinical situations. Patients may be managed by different specialists in the Middle East and North Africa (MENA) region and no data exist on patterns of clinical management. OBJECTIVES: To ascertain the diagnostic and therapeutic approaches to prolactinomas among relevant professionals from the MENA region. METHODS: An online survey of a large sample of physicians was conducted...
October 25, 2016: Pituitary
https://www.readbyqxmd.com/read/27778296/somatostatin-receptor-ligands-in-acromegaly-clinical-response-and-factors-predicting-resistance
#13
Rosa Maria Paragliola, Salvatore Maria Corsello, Roberto Salvatori
INTRODUCTION: Somatostatin (SST) receptor ligands (SRL), in particular those of first generation (Octreotide and Lanreotide), are widely used in medical treatment of acromegaly, but they assure biochemical control of disease (and the possibility of an improvement of clinical symptoms and tumor shrinkage), only in a subset of patients. DISCUSSION: The mechanisms underlying the so called "SRL resistance" are various and involve in particular SST receptor expression and molecular pathways of signal transduction...
October 24, 2016: Pituitary
https://www.readbyqxmd.com/read/27778295/lymphocytic-hypophysitis-modern-day-management-with-limited-role-for-surgery
#14
Angelos Kyriacou, Kanna Gnanalingham, Tara Kearney
PURPOSE: We set out to describe the modern day management of Lymphocytic hypophysitis (LH) with respect to its diagnosis, treatment and long-term endocrine and visual outcomes. We deliberately included patients with a clinical diagnosis of LH and compared them with those with a histological diagnosis following surgery. METHODS: A multi-centre observational study was performed. Twenty-two patients were included and studied over a mean follow-up period of 8.6 years (range 4-26 years)...
October 24, 2016: Pituitary
https://www.readbyqxmd.com/read/27770308/the-surgical-treatment-of-acromegaly
#15
Michael Buchfelder, Sven-Martin Schlaffer
PURPOSE: Surgical extraction of as much tumour mass as possible is considered the first step of treatment in acromegaly in many centers. In this article the potential benefits, disadvantages and limitations of operative acromegaly treatment are reviewed. METHODS: Pertinent literature was selected to provide a review covering current indications, techniques and results of operations for acromegaly. RESULTS: The rapid reduction of tumour volume is an asset of surgery...
October 21, 2016: Pituitary
https://www.readbyqxmd.com/read/27757801/significance-of-surgical-management-for-cystic-prolactinoma
#16
Toshihiro Ogiwara, Tetsuyoshi Horiuchi, Alhusain Nagm, Tetsuya Goto, Kazuhiro Hongo
PURPOSE: It is generally accepted that dopamine agonists (DA) represent the first-line treatment for most patients with prolactinoma, and patients become candidates for surgical intervention when DA is contraindicated. Surgical indication for cystic prolactinoma remains controversial. This study was performed to investigate the significance of surgery for cystic prolactinoma. METHODS: A total of 28 patients that underwent transsphenoidal resection of prolactinoma between February 2004 and May 2016 were reviewed...
October 18, 2016: Pituitary
https://www.readbyqxmd.com/read/27744503/immunoprofiling-of-glial-tumours-of-the-neurohypophysis-suggests-a-common-pituicytic-origin-of-neoplastic-cells
#17
Christian Hagel, Rolf Buslei, Michael Buchfelder, Rudolf Fahlbusch, Markus Bergmann, Armin Giese, Jörg Flitsch, Dieter K Lüdecke, Markus Glatzel, Wolfgang Saeger
PURPOSE: To analyse the antigen expression profiles of 27 cases of pituicytoma, spindle cell oncocytoma, and granular cell tumour of the sellar region concerning a common pituicytic origin of neoplastic cells. METHODS: Material from 12 female and 15 male patients (13 granular cell tumours of the sellar region, 10 pituicytomas, four spindle cell oncocytomas) collected in the German Registry of Pituitary Tumours between 1993 and 2015 was re-evaluated according to the current WHO classification of tumours of the central nervous system and supplementary immunohistochemistry including S100-protein, CD56, CD68, thyroid transcription factor-1 (TTF-1), and Ki-67 was performed...
October 15, 2016: Pituitary
https://www.readbyqxmd.com/read/27743174/epidemiology-of-acromegaly-review-of-population-studies
#18
Aikaterini Lavrentaki, Alessandro Paluzzi, John A H Wass, Niki Karavitaki
Acromegaly is a rare condition necessitating large population studies for the generation of reliable epidemiological data. In this review, we systematically analysed the epidemiological profile of this condition based on recently published population studies from various geographical areas. The total prevalence ranges between 2.8 and 13.7 cases per 100,000 people and the annual incidence rates range between 0.2 and 1.1 cases/100,000 people. The median age at diagnosis is in the fifth decade of life with a median diagnostic delay of 4...
October 14, 2016: Pituitary
https://www.readbyqxmd.com/read/27743173/acknowledgement-of-reviewers-2015
#19
(no author information available yet)
No abstract text is available yet for this article.
October 14, 2016: Pituitary
https://www.readbyqxmd.com/read/27743172/time-trends-of-mortality-in-patients-with-non-functioning-pituitary-adenoma-a-swedish-nationwide-study
#20
Daniel S Olsson, Ing-Liss Bryngelsson, Oskar Ragnarsson
PURPOSE: Patients with non-functioning pituitary adenomas (NFPA), especially women, have increased mortality. The aim of this study was to investigate whether mortality in NFPA patients has changed during the last two decades. METHODS: This was a nationwide population-based study including 2795 patients (1502 men, 1293 women) diagnosed with NFPA between 1997 and 2011. Patients were identified and followed in Swedish National Health Registries. Standardized mortality ratios (SMRs) with 95 % confidence intervals were calculated for three time periods at first NFPA diagnosis using the general population as reference...
October 14, 2016: Pituitary
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