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https://www.readbyqxmd.com/read/28205670/leptin-and-ghrelin-concentration-in-hyperthyroid-cats-before-and-after-radioactive-iodine-therapy-compared-to-euthyroid-control-cats
#1
Sina Marsilio, Barbara Glanemann, Lucile Martin, Balazs Szladovits, Reto Neiger
OBJECTIVE: Leptin and ghrelin, two peptide hormones with antagonistic effects on satiety and energy balance, could be involved in the pathogenesis of weight loss and polyphagia in cats with hyperthyroidism. Leptin generally decreases appetite and increases energy expenditure, while ghrelin exerts the opposite effects. MATERIALS AND METHODS: Leptin and ghrelin were measured in 42 client owned hyperthyroid cats with a body condition score (BCS) ≤ 5/9 before (T0) and 4 weeks after radioactive iodine treatment (RAIT) (T1)...
February 16, 2017: Tierärztliche Praxis. Ausgabe K, Kleintiere/Heimtiere
https://www.readbyqxmd.com/read/28097455/leptin-npy-melatonin-and-zinc-levels-in-experimental-hypothyroidism-and-hyperthyroidism-the-relation-to-zinc
#2
Abdulkerim Kasım Baltaci, Rasim Mogulkoc
Since zinc mediates the effects of many hormones or is found in the structure of numerous hormone receptors, zinc deficiency leads to various functional impairments in the hormone balance. And also thyroid hormones have important activity on metabolism and feeding. NPY and leptin are affective on food intake and regulation of appetite. The present study is conducted to determine how zinc supplementation and deficiency affect thyroid hormones (free and total T3 and T4), melatonin, leptin, and NPY levels in thyroid dysfunction in rats...
January 17, 2017: Biochemical Genetics
https://www.readbyqxmd.com/read/28079354/effect-of-excess-iodine-intake-on-thyroid-on-human-health
#3
Eftychia G Koukkou, Nikolaos D Roupas, Kostas B Markou
INTRODUCTION: The recommended daily intake of iodide, is 150 μg for adolescents and adults, 175 μg for pregnancy and 200 μg for lactation. Thyroid gland is an effective collector of iodine. EVIDENCE ACQUISITION: The active iodine uptake along the basolateral membrane of thyroid cell is followed by its transport to the apical edge of the cell and then to the follicle lumen. TSH acts through cAMP and stimulates NIS gene expression and protein synthesis. The major proportion of iodine in the thyroid gland is bound to Thyroglobulin...
January 12, 2017: Minerva Medica
https://www.readbyqxmd.com/read/28071990/natural-course-of-euthyroidism-and-clues-for-early-diagnosis-of-thyroid-dysfunctions-tehran-thyroid-study-tts
#4
Atieh Amouzegar, Zahra Ghaemmaghami, Maani Beygi, Safoora Gharibzadeh, Ladan Mehran, Maryam Tohidi, Fereidoun Azizi
OBJECTIVE: Considering the limited data available on the natural course of euthyroidism, this study was designed to evaluate the progression in time from euthyroidism to subclinical or overt hypo - or hyperthyroidism. METHODS: This study was conducted within the framework of the Tehran Thyroid cohort study (TTS), in which 5783 individuals aged 40.4 ± 0.2 years were followed for 6 years. The overall loss to follow-up rate was 8.3%. After applying exclusion criteria, data of 4204 euthyroid subjects remained for analysis of a six-year natural course analysis...
January 10, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28059636/effects-of-adequate-iodine-supply-on-the-incidence-of-iodine-induced-thyroid-disorders-in-slovenia
#5
Vid Bajuk, Katja Zaletel, Edvard Pirnat, Sergej Hojker, Simona Gaberšček
BACKGROUND: This study aimed to establish the changes in the incidence and characteristics of iodine-induced hyperthyroidism (II-Hyper) and iodine-induced hypothyroidism (II-Hypo) in the two-year period before and the 10-year period after the increase in mandatory salt iodization from the previous 10 mg/kg of potassium iodide to 25 mg/kg in 1999. Furthermore, the aim was to determine the duration of treatment in II-Hyper patients, since no data regarding severity and treatment of II-Hyper with respect to iodine supply are available...
February 1, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/27981277/a-dilemma-at-gray-scale-thyroid-ultrasound-microcalcification-or-not-differentiation-with-acoustic-radiation-force-impulse-imaging-virtual-touch-imaging
#6
Duzgun Yildirim, Cesur Samanci, Fethi Emre Ustabasioglu, Deniz Alis, Bulent Colakoglu, Alev Bakır, Onur Tutar, Ahmet Erdem Kilavuz, Ahmet Kaur
AIMS: To evaluate the capacity of virtual touch imaging (VTI) of the acoustic radiation force impulse (ARFI) techniquein the differential diagnosis of micro-echogenicities in thyroid nodules. MATERIAL AND METHODS: The study comprised 28patients. Gray scale and ARFI displacement maps were used during ultrasound examination.In the same session, fine needleaspiration biopsy (FNAB) samples were obtained from the dominant nodule hav-ing micro-echogenicities. Two radiologists blinded to the FNAB results and clinical data of the patients evaluated these images and rated ARFI echogenicities according to the degree of shining points on the displacement maps and classified them as isohypoechogenic, isohyperechogenic, and obvious hyperechogenic...
December 5, 2016: Medical Ultrasonography
https://www.readbyqxmd.com/read/27941950/thyroid-hormone-status-defines-brown-adipose-tissue-activity-and-browning-of-white-adipose-tissues-in-mice
#7
Juliane Weiner, Mathias Kranz, Nora Klöting, Anne Kunath, Karen Steinhoff, Eddy Rijntjes, Josef Köhrle, Vilia Zeisig, Mohammed Hankir, Claudia Gebhardt, Winnie Deuther-Conrad, John T Heiker, Susan Kralisch, Michael Stumvoll, Matthias Blüher, Osama Sabri, Swen Hesse, Peter Brust, Anke Tönjes, Kerstin Krause
The present study aimed to determine the effect of thyroid hormone dysfunction on brown adipose tissue activity and white adipose tissue browning in mice. Twenty randomized female C57BL/6NTac mice per treatment group housed at room temperature were rendered hypothyroid or hyperthyroid. In-vivo small animal (18)F-FDG PET/MRI was performed to determine the effects of hypo- and hyperthyroidism on BAT mass and BAT activity. Ex-vivo(14)C-acetate loading assay and assessment of thermogenic gene and protein expression permitted analysis of oxidative and thermogenic capacities of WAT and BAT of eu-, hyper and hypothyroid mice...
December 12, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27894163/feature-of-amenorrhea-in-postoperative-tamoxifen-users-with-breast-cancer
#8
Hoon Kim, Wonshik Han, Seung Yup Ku, Chang Suk Suh, Seok Hyun Kim, Young Min Choi
OBJECTIVE: Tamoxifen has been used to prevent the recurrence of breast cancer. However, tamoxifen-users frequently experience amenorrhea and it can be confused from that caused by other hormonal abnormalities. In amenorrheic patients without breast cancer, clinicians usually measure the sex hormone levels that are known to be associated with ovarian or menstrual function. This study aimed to investigate the feature of female sex hormones in premenopausal breast cancer patients undergoing tamoxifen treatment...
October 27, 2016: Journal of Gynecologic Oncology
https://www.readbyqxmd.com/read/27886677/differences-in-global-dna-methylation-of-testicular-seminoma-are-not-associated-with-changes-in-histone-modifications-clinical-prognosis-braf-mutations-or-gene-expression
#9
Louise Holm Pedersen, John E Nielsen, Gedske Daugaard, Thomas V O Hansen, Ewa Rajpert-De Meyts, Kristian Almstrup
Testicular germ cell tumours of young adults are comprised of a heterogeneous group of non-seminomas and a homogeneous group of seminomas. While the majority of seminomas retain a hypo-methylated genome, a small fraction displays a highly methylated genome, resembling hyper-methylated non-seminomas. It is well established from e.g. melanoma, colorectal and thyroid cancer that a methylated phenotype can be correlated to prognosis and can be related to BRAF mutations. In the present study we investigated the global methylation level in 67 seminomas and classified them as hypo-methylated, intermediate, patchy and hyper-methylated, respectively...
November 2016: Cancer Genetics
https://www.readbyqxmd.com/read/27859916/mild-thyrotoxicosis-leads-to-brain-perfusion-changes-an-arterial-spin-labelling-study
#10
A Göbel, M Heldmann, A Sartorius, M Göttlich, A-L Dirk, G Brabant, T F Münte
Hypo- and hyperthyroidism have effects on brain structure and function, as well as cognitive processes, including memory. However, little is known about the influence of thyroid hormones on brain perfusion and the relationship of such perfusion changes with cognition. The present study aimed to demonstrate the effect of short-term experimental hyperthyroidism on brain perfusion in healthy volunteers and to assess whether perfusion changes, if present, are related to cognitive performance. It is known that an interaction exists between brain perfusion and cerebral oxygen consumption rate and it is considered that neural activation increases cerebral regional perfusion rate in brain areas associated with memory...
January 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/27843806/a-2016-italian-survey-about-the-clinical-use-of-selenium-in-thyroid-disease
#11
Roberto Negro, Roberto Attanasio, Franco Grimaldi, Claudio Marcocci, Rinaldo Guglielmi, Enrico Papini
BACKGROUND: Selenium (Se) is a trace element that plays key roles in thyroid physiology. Se deficiency is associated with increased risk of thyroid disease. Some evidence suggests that Se supplementation may be beneficial in autoimmune thyroid disease (either hypo- or hyperthyroidism). OBJECTIVES: We sought to examine the use of Se in daily clinical practice among Italian endocrinologists. METHODS: Members of the Associazione Medici Endocrinologi (AME) were invited to participate in a web-based survey investigating the use of Se in different clinical conditions...
September 2016: European Thyroid Journal
https://www.readbyqxmd.com/read/27835928/population-based-national-prevalence-of-thyroid-dysfunction-in-spain-and-associated-factors-di-bet-es-study
#12
Sergio Valdés, Cristina Maldonado-Araque, Ana Lago-Sampedro, J Antonio Lillo, Eduardo Garcia-Fuentes, Vidal Perez-Valero, Carolina Gutierrez-Repiso, Pilar Ocon-Sanchez, Albert Goday, Ines Urrutia, Laura Peláez, Alfonso Calle-Pascual, Elena Bordiú, Luis Castaño, Conxa Castell, Elias Delgado, Edelmiro Menendez, Josep Franch, Sonia Gaztambide, Joan Girbés, Emilio Ortega, Alfonso Lopez-Alba, Felipe J Chaves, Joan Vendrell, Matilde R Chacón, Federico Soriguer, Gemma Rojo-Martínez
BACKGROUND: The aim of this study was to investigate the national prevalence of thyroid dysfunction in Spain and its association with various clinical, environmental, and demographic variables. METHODS: The study included 4554 subjects (42.4% men) with a mean age of 50 years (range 18-93 years), who were participants in a national, cross-sectional, population-based survey conducted in 2009-2010. Data gathered included clinical and demographic characteristics, physical examination, and blood sampling...
February 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/27774323/syndrome-of-reduced-sensitivity-to-thyroid-hormones-two-case-reports-and-a-literature-review
#13
Anastasios Anyfantakis, Dimitrios Anyfantakis, Irene Vourliotaki
Resistance to thyroid hormone (RTH) is an extremely rare dominantly inherited condition of impaired tissue responsiveness to thyroid hormone (TH). Most patients with RTH have mutations in the gene that encodes the β isoform of the receptor of thyroid hormone (THR-β gene). Mutant receptors are unable to activate or repress target genes. The majority of them are asymptomatic or rarely have hypo- or hyperthyroidism. RTH is suspected by the finding of persistent elevation of serum levels of free T3 (FT3) and free T4 (FT4) and nonsuppressed TSH...
2016: Case Reports in Endocrinology
https://www.readbyqxmd.com/read/27630568/pazopanib-in-metastatic-renal-cancer-a-real-world-experience-at-national-cancer-institute-fondazione-g-pascale
#14
Sabrina C Cecere, Sabrina Rossetti, Carla Cavaliere, Chiara Della Pepa, Marilena Di Napoli, Anna Crispo, Gelsomina Iovane, Raffaele Piscitelli, Domenico Sorrentino, Gennaro Ciliberto, Piera Maiolino, Paolo Muto, Sisto Perdonà, Massimiliano Berretta, Sandro Pignata, Gaetano Facchini, Carmine D'Aniello
Pazopanib is an oral angiogenesis inhibitor, currently approved for treatment of metastatic renal cell carcinoma (mRCC) and soft tissue sarcoma. The present study analyzed the outcomes of pazopanib in first-line treatment of mRCC, in a single Italian cancer center. In the light of the retrospective, observational nature and the unselected population, our experience can be defined a "real-world" study. The medical records of 38 mRCC patients treated with front-line pazopanib were retrospectively reviewed and analyzed...
2016: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/27623500/diagnostic-performance-of-shear-wave-elastography-parameters-alone-and-in-combination-with-conventional-b-mode-ultrasound-parameters-for-the-characterization-of-thyroid-nodules-a-prospective-dual-center-study
#15
Katarzyna Dobruch-Sobczak, Elwira Bakuła Zalewska, Anna Gumińska, Rafał Zenon Słapa, Krzysztof Mlosek, Paweł Wareluk, Wiesław Jakubowski, Marek Dedecjus
The aims of our study were to determine whether shear wave elastography (SWE) can improve the conventional B-mode differentiation of thyroid lesions, determine the most accurate SWE parameter for differentiation and assess the influence of microcalcifications and chronic autoimmune thyroiditis on SWE values. We examined 119 patients with 169 thyroid nodules who prospectively underwent B-mode ultrasound and SWE using the same ultrasound machine. The parameters assessed using SWE were: mean elasticity within the entire lesion (SWE-whole) and mean (SWE-mean) and maximum (SWE-max) elasticity for a 2-mm-diameter region of interest in the stiffest portion of the lesion, excluding microcalcifications...
December 2016: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/27580013/decreased-anxiety-and-depression-like-behaviors-and-hyperactivity-in-a-type-3-deiodinase-deficient-mouse-showing-brain-thyrotoxicosis-and-peripheral-hypothyroidism
#16
J Patrizia Stohn, M Elena Martinez, Arturo Hernandez
Hypo- and hyperthyroid states, as well as functional abnormalities in the hypothalamic-pituitary-thyroid axis have been associated with psychiatric conditions like anxiety and depression. However, the nature of this relationship is poorly understood since it is difficult to ascertain the thyroid status of the brain in humans. Data from animal models indicate that the brain exhibits efficient homeostatic mechanisms that maintain local levels of the active thyroid hormone, triiodothyronine (T3) within a narrow range...
December 2016: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/27559466/sex-specific-phenotypes-of-hyperthyroidism-and-hypothyroidism-in-mice
#17
Helena Rakov, Kathrin Engels, Georg Sebastian Hönes, Karl-Heinz Strucksberg, Lars Christian Moeller, Josef Köhrle, Denise Zwanziger, Dagmar Führer
BACKGROUND: Thyroid dysfunction is more common in the female population, however, the impact of sex on disease characteristics has rarely been addressed. Using a murine model, we asked whether sex has an influence on phenotypes, thyroid hormone status, and thyroid hormone tissue response in hyper- and hypothyroidism. METHODS: Hypo- and hyperthyroidism were induced in 5-month-old female and male wildtype C57BL/6N mice, by LoI/MMI/ClO4 (-) or T4 i.p. treatment over 7 weeks, and control animals underwent sham treatment (N = 8 animals/sex/treatment)...
2016: Biology of Sex Differences
https://www.readbyqxmd.com/read/27411690/regulation-of-glucose-transport-by-thyroid-hormone-in-rat-ovary
#18
Yu Ding, Ye Tian, Meng Guo, Juan Liu, Dai Heng, Baochang Zhu, Yanzhou Yang, Cheng Zhang
Thyroid hormone (TH) plays an important role in regulating ovarian development. However, the mechanism involved remains unclear. Evidence suggests that glucose is essential for ovarian development, and its uptake is mediated by several glucose transporter proteins (Glut). We have investigated the effects of TH on Glut in rat ovary. Immature rats were treated with 6-propyl-2-thiouracil or L-thyroxine to induce hypothyroidism (hypo) or hyperthyroidism (hyper), respectively. Ovarian weights significantly decreased in both treated groups compared with the control group, although the body weights were not markedly altered...
July 14, 2016: Cell and Tissue Research
https://www.readbyqxmd.com/read/27276725/-iodine-excess-induced-thyroid-dysfunction
#19
Michael Egloff, Jacques Philippe
The principle sources of iodine overload, amiodarone and radiologic contrast media, are frequently used in modern medicine. The thyroid gland exerts a protective effect against iodine excess by suppressing iodine internalization into the thyrocyte and iodine organification, the Wolff-Chaikoff effect. Insufficiency of this effect or lack of escape from it leads to hypo- or hyperthyroidism respectively. Amiodarone induced thyrotoxicosis is a complex condition marked by two different pathophysiological mechanisms with different treatments...
April 20, 2016: Revue Médicale Suisse
https://www.readbyqxmd.com/read/27274413/intramedullary-spinal-cord-metastasis-arising-from-papillary-thyroid-carcinoma-a-case-report-and-review-of-literature
#20
Soubhagya R Tripathy, Rama C Deo, Sanjib Mishra, Manmath K Dhir, Pratap C Nath, Mani C Satapathy
BACKGROUND: Intramedullary spinal cord metastases (IMSCM) are typically drop lesions from intracranial metastases and are a rare manifestation of systemic malignancy (8.5% of central nervous system metastases). They arise from primaries such as the lungs, breast, kidney, melanoma, or lymphoma. On the other hand, they arise very rarely from papillary thyroid carcinoma (PTC), even though it is the most common type of primary thyroid malignancy. CASE DESCRIPTION: A 54-year-old male presented with pain in the lower back along with tingling, numbness, and weakness in the bilateral lower limbs...
2016: Surgical Neurology International
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