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https://www.readbyqxmd.com/read/28626863/prolactin-correction-for-adequacy-of-petrosal-sinus-cannulation-may-diminish-diagnostic-accuracy-in-cushing-s-disease
#1
Sunita Mc De Sousa, Ann I McCormack, Shaun McGrath, David J Torpy
OBJECTIVE: Petrosal venous prolactin concentrations have been promoted to improve the diagnostic accuracy of inferior petrosal sinus sampling (IPSS), beyond that achieved with ACTH measurement alone, in diagnosing a pituitary ACTH source, and determining corticotrophinoma side (L/R). Our objective was to assess the effect of using prolactin to confirm adequacy of petrosal cannulation in a cohort of patients with ACTH-dependent Cushing's syndrome. DESIGN: Retrospective cohort study...
June 19, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28606834/greb1-regulates-convergent-extension-movement-and-pituitary-development-in-zebrafish
#2
Shi-Zhu Li, Wei Liu, Zhi Li, Wen-Hua Li, Yang Wang, Li Zhou, Jian-Fang Gui
greb1, growth regulation by estrogen in breast cancer 1, is an important estrogen response gene, which participates in breast cancer formation. However, the role of greb1 in development is largely unknown. In this study, we have characterized greb1 expression patterns and revealed its regulative role in convergent extension movement and pituitary development in zebrafish. In zebrafish adults, greb1 was revealed to be expressed mainly in pituitary, hypothalamus, liver, and gonads. During embryogenesis, RT-PCR and WISH revealed its spatial and temporal expression specific to embryonic margin during gastrulation, central nervous system during segmentation and brain ventricular regions from 24hpf...
June 9, 2017: Gene
https://www.readbyqxmd.com/read/28603917/a-rare-castration-resistant-progenitor-cell-population-is-highly-enriched-in-pten-null-prostate-tumors
#3
Lucila Sackmann Sala, Florence Boutillon, Giulia Menara, Andréa De Goyon-Pélard, Mylène Leprévost, Julie Codzamanian, Natalie Lister, Jan Pencik, Ashlee Clark, Nicolas Cagnard, Christine Bole-Feysot, Richard Moriggl, Gail P Risbridger, Renea A Taylor, Lukas Kenner, Jacques-Emmanuel Guidotti, Vincent Goffin
Castration-resistant prostate cancer is a lethal disease. The cell type(s) that survive androgen-deprivation remain poorly described despite global efforts to understand the various mechanisms of therapy resistance. We recently identified in wild-type (WT) mouse prostates a rare population of luminal progenitor cells that we called LSC(med) according to their FACS profile (Lin(-) /Sca-1(+) /CD49f(med) ). Here we investigated the prevalence and castration-resistance of LSC(med) in various mouse models of prostate tumorigenesis (Pb-PRL, Pten(pc-/-) , Hi-Myc mice)...
June 12, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28595109/effects-of-nonglycosylated-and-glycosylated-prolactin-on-basal-and-gonadotropin-stimulated-steroidogenesis-in-chicken-ovarian-follicles
#4
S Q Hu, D Zadworny
In galliformes, the circulating isoform of prolactin (PRL) significantly changes during different reproductive states. However, the role of the major isoform (glycosylated PRL [G-PRL]) in ovarian steroidogenesis is unknown. The present study aimed to compare the effects of nonglycosylated (NG-) and G-PRL on basal and gonadotropin-stimulated estradiol (E2) and progesterone (P4) production in granulosa cells or follicular walls of chicken of different size class follicles. In the initial experiment, granulosa cells of preovulatory F3-F1 and prehierarchical 6- to 8-mm follicles were incubated for 24 h with different concentrations of NG- or G-PRL (0, 1, 10, 100, or 1,000 ng/mL)...
May 10, 2017: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/28593164/chemiluminescence-systems-do-all-lead-to-same-results-in-prolactin-analysis
#5
Marjan Rahnamaye Farzami, Mehri Aliasgharpour
BACKGROUND: Human prolactin (PRL) is a hormone that is mainly secreted by lactotroph cells of the anterior pituitary gland and is involved in many biological processes including lactation and reproduction. Prolactin level may be determined quantitatively in serum by many different systems including chemiluminescence systems. However, comparison of the measured values between systems is difficult. METHODS: The prolactin values obtained and compared in two chemiluminescence systems; AUTOBIO DIAGNOSTICS MICROPLATE LUMOMETER and LIAISON XL Analyzer using BioRad tri level serum quality control materials and serum samples from n = 44 female patients; (Age mean & range) = (33: 21-65) years...
2017: Journal of Diabetes and Metabolic Disorders
https://www.readbyqxmd.com/read/28589963/exposure-to-the-abused-inhalant-toluene-alters-medial-prefrontal-cortex-physiology
#6
Wesley N Wayman, John J Woodward
Inhalants, including toluene, target the addiction neurocircuitry and are often one of the first drugs of abuse tried by adolescents. The medial prefrontal cortex (mPFC) is involved in regulating goal-directed/reward-motivated behaviors and different mPFC sub-regions have been proposed to promote (prelimbic, PRL) or inhibit (infralimbic, IL) these behaviors. While this dichotomy has been studied in the context of other drugs of abuse, it is not known whether toluene exposure differentially affects neurons within PRL and IL regions...
June 7, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28589294/acromegaly-surgical-results-in-548-patients
#7
REVIEW
Cecilia Fernández Mateos, Maria García-Uria, Tomás Lucas Morante, José García-Uría
PURPOSE: The goal of this study was to quantified the results of microsurgery, in all the patients with acromegaly treated by the same endocrinologist and the same surgeon between 1975 and 2015. METHODS: A series of 548 patients with acromegaly were operated and followed-up from 6 months to 40 years. Patients were selected according to five criteria: (1) Operated by the same surgeon. (2) No previous treatment. (3) Complete endocrinological preoperative studies including GH, OGTT, IGF-I, PRL test and TC/MRI...
June 6, 2017: Pituitary
https://www.readbyqxmd.com/read/28585780/the-effects-of-l-dopa-and-sulpiride-on-growth-hormone-secretion-at-different-injection-times-in-holstein-steers
#8
Etsuko Kasuya, Madoka Sutoh, Ken-Ichi Yayou
The effects of l-DOPA, a precursor of dopamine (DA), and sulpiride, a D2 -type DA receptor blocker, on growth hormone (GH) and prolactin (PRL) secretion were investigated in steers. Eight Holstein steers (212.8 ± 7.8 kg body weight) were used. Lighting conditions were 12:12 L:D (lights on: 06.00-18.00 hours). Blood samplings were performed during the daytime (11.00-15.00 hours) and nighttime (23.00-03.00 hours). Intravenous injections of drugs or saline were performed at 12.00 hour for the daytime and 00...
June 6, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28585320/serotonin-transporter-blockade-contributes-to-the-behavioral-neuronal-and-molecular-effects-of-cocaine
#9
Linda D Simmler, Allison M J Anacker, Michael H Levin, Nina M Vaswani, Paul J Gresch, Alex G Nackenoff, Noelle C Anastasio, Sonja J Stutz, Kathryn A Cunningham, Jing Wang, Bing Zhang, L Keith Henry, Adele Stewart, Jeremy Veenstra-VanderWeele, Randy D Blakely
BACKGROUND AND PURPOSE: The psychostimulant cocaine induces complex molecular, cellular and behavioral responses as a consequence of inhibiting presynaptic dopamine, noradrenaline and serotonin (5-HT) transporters. To elucidate 5-HT transporter (SERT)-specific contributions to cocaine action, we evaluated cocaine effects in the SERT Met172 knock-in mouse, which expresses a SERT coding substitution that eliminates high-affinity cocaine recognition. EXPERIMENTAL APPROACH: We validated the impact of SERT Met172 on cocaine antagonism of 5-HT re-uptake using ex vivo synaptosome preparations and in vivo microdialysis...
June 5, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28558273/evolution-of-multiple-quantum-coherences-with-scaled-dipolar-hamiltonian
#10
Claudia M Sánchez, Lisandro Buljubasich, Horacio M Pastawski, Ana K Chattah
In this article, we introduce a pulse sequence which allows the monitoring of multiple quantum coherences distribution of correlated spin states developed with scaled dipolar Hamiltonian. The pulse sequence is a modification of our previous Proportionally Refocused Loschmidt echo (PRL echo) with phase increment, in order to verify the accuracy of the weighted coherent quantum dynamics. The experiments were carried out with different scaling factors to analyze the evolution of the total magnetization, the time dependence of the multiple quantum coherence orders, and the development of correlated spins clusters...
May 20, 2017: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/28556305/hypothalamic-dopamine-is-required-for-salsolinol-induced-prolactin-secretion-in-goats
#11
Tsutomu Hashizume, Ryunosuke Watanabe, Yuki Inaba, Ken Sawai, Ferenc Fülöp, György Miklos Nagy
The aim of the present study was to clarify the relationship between hypothalamic dopamine (DA) and salsolinol (SAL) for the secretion of prolactin (PRL) in goats. SAL or thyrotropin-releasing hormone (TRH) was intravenously injected into female goats treated with or without the D2 DA receptor antagonist haloperidol (Hal), which crosses the blood-brain barrier, and the PRL-releasing response to SAL was compared with that to TRH. PRL-releasing responses to SAL, Hal, and Hal plus SAL were also examined after a pretreatment to augment central DA using carbidopa (Carbi) and L-dopa...
May 29, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28546817/clinical-and-biochemical-characteristics-in-pcos-women-with-menstrual-abnormalities
#12
Vasiliki Christodoulopoulou, Eftihios Trakakis, Vasilios Pergialiotis, Melpomeni Peppa, Charalampos Chrelias, Dimitrios Kassanos, Nikolaos Papantoniou
Objective: The purpose of the present study was to examine the impact of menstrual cycle abnormalities among patients with polycystic ovary syndrome (PCOS) on biochemical and anthropometric characteristics. Materials and methods: We conducted a prospective observational study of patients 17-35 years of age with PCOS that attended the department of Gynecological Endocrinology of our hospital. Results: A total of 309 women with PCOS participated in the study. In total, 72.2% suffered from menstrual cycle disorders...
December 2016: Journal of Family & Reproductive Health
https://www.readbyqxmd.com/read/28536269/a-cognition-related-neural-oscillation-pattern-generated-in-the-prelimbic-cortex-can-control-operant-learning-in-rats
#13
Samuel Hernández-González, Celia Andreu-Sánchez, Miguel Ángel Martín-Pascual, Agnès Gruart, José María Delgado-García
The prelimbic (PrL) cortex constitutes one of the highest levels of cortical hierarchy dedicated to the execution of adaptive behaviors. We have identified a specific local field potential (LFP) pattern generated in the PrL cortex and associated with cognition-related behaviors. We used this pattern to trigger the activation of a visual display on a touch screen as part of an operant conditioning task. Rats learned to increase the presentation rate of the selected θ to β-γ (θ/β-γ) transition pattern across training sessions...
June 14, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28526958/-ectopic-suprasellar-type-iia-prl-secreting-pituitary-adenoma
#14
REVIEW
Heng-Jun Zhou, De-Sheng Pan, Xiao-Qun Ba, Ren-Ya Zhan, Xiu-Jue Zheng, Yue-Hui Ma
BACKGROUND: Ectopic pituitary adenomas (EPAs) are rare, and the suprasellar cistern seems to be the most common location. At this time, no detailed original classification, diagnosis, or treatment protocols for suprasellar pituitary adenomas (SPAs) have been described. CASE DESCRIPTION: A 19-year-old man showed visual disturbances and lack of libido for 3 years, he suffered a sharp decline in vision with only light perception in the last week. Magnetic resonance imaging scans revealed a large suprasellar cystic lesion with a normal pituitary in the sella turcica...
May 19, 2017: Pituitary
https://www.readbyqxmd.com/read/28523537/prolactinoma-management-predictors-of-remission-and-recurrence-after-dopamine-agonists-withdrawal
#15
Margarida Teixeira, Pedro Souteiro, Davide Carvalho
OBJECTIVE: Prolactinomas are the most common functional pituitary tumour. Dopamine agonists (DA) are its principal treatment. The criteria that should guide therapy withdrawal and the factors that influence disease remission or relapse are not yet fully established. Our purpose is to evaluate the proportion of patients who attempted DA withdrawal, and to identify the factors that influence clinicians to try it. In addition, we aim to study the factors that are involved in prolactinoma remission/relapse after therapy withdrawal...
May 18, 2017: Pituitary
https://www.readbyqxmd.com/read/28520590/role-of-tyrosine-kinase-inhibitors-in-the-treatment-of-pituitary-tumours-from-bench-to-bedside
#16
Anat Ben-Shlomo, Odelia Cooper
PURPOSE OF REVIEW: Treatment of aggressive pituitary tumours often yields suboptimal control of the tumour and confers significant morbidity. Lactotroph and corticotroph-derived tumours express ErbB receptors and ligands, and mutations in ubiquitin-specific protease 8 (USP8), which alters epidermal growth factor receptor (EGFR) degradation, have been implicated in Cushing disease pathogenesis. EGFR tyrosine kinase inhibitor (TKI) therapy has emerged as a potential new therapeutic approach for patients with aggressive prolactinomas and Cushing disease...
May 17, 2017: Current Opinion in Endocrinology, Diabetes, and Obesity
https://www.readbyqxmd.com/read/28516968/preliminary-experience-with-4k-ultra-high-definition-endoscope-analysis-of-pros-and-cons-in-skull-base-surgery
#17
M Rigante, G La Rocca, L Lauretti, G Q D'Alessandris, A Mangiola, C Anile, A Olivi, G Paludetti
During the last two decades endoscopic skull base surgery observed a continuous technical and technological development 3D endoscopy and ultra High Definition (HD) endoscopy have provided great advances in terms of visualisation and spatial resolution. Ultra-high definition (UHD) 4K systems, recently introduced in the clinical practice, will shape next steps forward especially in skull base surgery field. Patients were operated on through transnasal transsphenoidal endoscopic approaches performed using Olympus NBI 4K UHD endoscope with a 4 mm 0° Ultra Telescope, 300 W xenon lamp (CLV-S400) predisposed for narrow band imaging (NBI) technology connected through a camera head to a high-quality control unit (OTV-S400 - VISERA 4K UHD) (Olympus Corporation, Tokyo, Japan)...
June 2017: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/28509313/decreased-expression-of-survivin-2b-in-human-pituitary-adenomas-a-preliminary-study
#18
Joanna Waligorska-Stachura, Nadia Sawicka-Gutaj, Maciej Zabel, Wlodzimierz Liebert, Pawel Gut, Agata Czarnywojtek, Marek Ruchala
INTRODUCTION: We aimed to investigate survivin and its splice variants DEx3 and 2B expressions in pituitary adenomas and normal pituitary glands using immunohistochemistry. MATERIAL AND METHODS: The study group consisted of eight pituitary adenomas: five of non-functional tumors, two of GH-secreting tumors, and one PRL-secreting tumor. Eight healthy pituitary tissue samples obtained after autopsy served as controls. RESULTS: Survivin expression was found in 87...
2017: Folia Histochemica et Cytobiologica
https://www.readbyqxmd.com/read/28507071/characterization-of-the-protein-tyrosine-phosphatase-lmprl-1-secreted-by-leishmania-major-via-the-exosome-pathway
#19
Sabine Leitherer, Joachim Clos, Elisabeth M Liebler-Tenorio, Ulrike Schleicher, Christian Bogdan, Didier Soulat
Similar to other intracellular pathogens, Leishmania parasites are known to evade the antimicrobial effector functions of host immune cells. To date, however, only few virulence factors have been described for Leishmania (L.) major, one of the causative agents of cutaneous leishmaniasis. Here, we characterized the expression and function of a L. major phosphatase which we termed LmPRL-1. This enzyme shows a strong structural similarity to the human phosphatases of regenerating liver (PRL-1, -2, and -3) that are regulating the proliferation, differentiation and motility of cells...
May 15, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28506283/prolactin-blocks-the-expression-of-receptor-activator-of-nuclear-factor-%C3%AE%C2%BAb-ligand-and-reduces-osteoclastogenesis-and-bone-loss-in-murine-inflammatory-arthritis
#20
Maria G Ledesma-Colunga, Norma Adán, Georgina Ortiz, Mariana Solís-Gutiérrez, Fernando López-Barrera, Gonzalo Martínez de la Escalera, Carmen Clapp
BACKGROUND: Prolactin (PRL) reduces joint inflammation, pannus formation, and bone destruction in rats with polyarticular adjuvant-induced arthritis (AIA). Here, we investigate the mechanism of PRL protection against bone loss in AIA and in monoarticular AIA (MAIA). METHODS: Joint inflammation, trabecular bone loss, and osteoclastogenesis were evaluated in rats with AIA treated with PRL (via osmotic minipumps) and in mice with MAIA that were null (Prlr-/-) or not (Prlr+/+) for the PRL receptor...
May 15, 2017: Arthritis Research & Therapy
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