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https://www.readbyqxmd.com/read/29351420/fourth-ventricular-tsh-induces-satiety-and-increases-body-temperature-in-rats
#1
Ulrika Smedh, Karen A Scott, Timothy H Moran
Besides its well-known action to stimulate thyroid hormone release, Thyrotropin mRNA is expressed within the brain and Thyrotropin and its receptor have been shown to be present in brain areas that control feeding and gastrointestinal function. Here, the hypothesis that Thyrotropin acts on receptors in the dorsal hindbrain to alter food intake and/or gastric function was tested. Fourth ventricular injections of Thyrotropin (0.06, 0.6 and 6.0 µg) were given to rats with chronic intracerebroventricular cannulas aimed at the fourth ventricle...
January 3, 2018: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29346569/controlled-antenatal-thyroid-screening-ii-effect-of-treating-maternal-sub-optimal-thyroid-function-on-child-cognition
#2
Charlotte Hales, Peter N Taylor, Sue Channon, Ruth Paradice, Kirsten McEwan, Lei Zhang, Michael Gyedu, Ameen Bakhsh, Onyebuchi Okosieme, Ilaria Muller, Mohd S Draman, John W Gregory, Colin Dayan, John H Lazarus, D Aled Rees, Marian Ludgate
Context & Objective: The Controlled Antenatal Thyroid Screening (CATS) study investigated treatment for suboptimal gestational thyroid function (SGTF) on childhood cognition and found no difference in IQ at 3 years between children of treated and untreated SGTF mothers. We have measured IQ in the same children at age 9.5-years and included children from normal-GTF mothers. Design, Setting & Participants: One examiner, blinded to participant group, assessed children's IQ (WISC-IV), long-term memory and motor function (NEPSY-II) from children of 119 treated and 98 untreated SGTF mothers plus children of 232 mothers with normal-GTF...
January 15, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29344467/longitudinal-change-in-thyroid-hormone-levels-in-children-with-epilepsy-on-a-ketogenic-diet-prevalence-and-risk-factors
#3
Yun-Jin Lee, Sang Ook Nam, Kyung-Min Kim, Young Mi Kim, Gyu Min Yeon
Background and Purpose: The aim of this study is to evaluate the prevalence of hypothyroidism and the change of thyroid hormone level in the children with epilepsy on a ketogenic diet (KD). Methods: The levels of serum free thyroxine (fT4) and thyroid-stimulation hormone (TSH) were measured at the start of the KD and at 6- to 12-month intervals in children with intractable epilepsy. Hypothyroidism was defined as fT4 level < 0.8 ng/dL and TSH level > 6.0 μIU/mL...
December 2017: Journal of Epilepsy Research
https://www.readbyqxmd.com/read/29339185/dose-response-relationship-of-tryptophan-with-large-neutral-amino-acids-and-its-impact-on-physiological-responses-in-the-chick-model
#4
Alhassan Usman Bello, Zulkifli Idrus, Goh Yong Meng, Edward J Narayan, Abdoreza Soleimani Farjam
Tryptophan (Trp) has been associated with the regulation of several behavioral and physiological processes, through stimulation of serotonergic activity. Tryptophan utilization at the metabolic level is influenced by the competitive carrier system it shares with large neutral amino acids (LNAA). This study was carried out using meat-type chicken as a model, to investigate the dose response effects of Trp/LNAA on fear response (tonic immobility; TI) and hormonal responses, including corticosterone (CORT), serotonin (5-HT), triiodothyronine (T3) and thyroxine (T4)...
January 12, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29337034/establishment-of-trimester-specific-reference-range-for-thyroid-hormones-during-pregnancy
#5
Sima Nazarpour, Fahimeh Ramezani Tehrani, Masoumeh Simba, Sonia Minooee, Maryam Rahmati, Mohammad Ali Mansournia, Fereidoun Azizi
OBJECTIVE: Physiological gestational changes are associated with alterations in thyroid function which require different biochemical interpretation from that of non-pregnant women and necessitate established pregnancy-specific reference ranges. We aimed to identify the trimester-specific ranges of thyroid markers in a healthy population of pregnant Iranian women. METHODS: In this self-sequential study, data were extracted from The Tehran Thyroid Study; a total of 314 women were tested during the 1st, 2nd and 3rd trimesters for serum levels of thyrotropin (TSH), thyroxine (T4), free thyroxine index (FT4I) and thyroid peroxidase antibody (TPOAb)...
January 11, 2018: Clinical Biochemistry
https://www.readbyqxmd.com/read/29336230/alterations-of-global-dna-methylation-and-dnmt-expression-in-t-and-b-lymphocytes-from-patients-with-newly-diagnosed-aitd-after-treatment-a-follow-up-study
#6
Qingling Guo, Dan Wu, Huixin Yu, Jiandong Bao, Shiqiao Peng, Zhongyan Shan, Haixia Guan, Weiping Teng
BACKGROUND: Dysregulated DNA methylation in lymphocytes has been linked to autoimmune disorders. The aims of this study were to identify global DNA methylation patterns in patients with autoimmune thyroid diseases (AITDs) and to observe methylation changes after treatment for these conditions. METHODS: We conducted a cross-sectional study design including the following patients: 51 with newly diagnosed Graves' disease (GD), 28 with autoimmune hypothyroidism (AIT), 29 with positive thyroid autoantibodies (pTAb) and 39 matched healthy volunteers...
January 16, 2018: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/29335252/diagnostic-reevaluation-of-congenital-hypothyroidism-in-macedonia-predictors-for-transient-or-permanent-hypothyroidism
#7
Nikolina Zdraveska, Maja Zdravkovska, Violeta Anastasovska, Elena Sukarova-Angelovska, Mirjana Kocova
BACKGROUND: Diagnostic re-evaluation is important for all patients with congenital hypothyroidism (CH) for determining the etiology and identifying transient CH cases. Our study is a first thyroxine therapy withdrawal study conducted in Macedonian CH patients for a diagnostic re-evaluation. We aimed to evaluate the etiology of CH, the prevalence of transient CH and identify predictive factors for distinguishing between permanent (PCH) and transient CH (TCH). MATERIAL AND METHODS: Patients with CH aged > 3 years underwent a trial of treatment withdrawal for 4 weeks period...
January 15, 2018: Endocrine Connections
https://www.readbyqxmd.com/read/29331885/autonomously-hyperfunctioning-cystic-nodule-harbouring-thyroid-carcinoma-case-report-and-literature-review
#8
Maria João Lima, Virgínia Soares, Pedro Koch, Artur Silva, António Taveira-Gomes
INTRODUCTION: Hyperthyroidism is rarely associated with malignancy, but it cannot rule out thyroid cancer. Although there is published data describing this coexistence, thyroid carcinomas inside autonomously functioning nodules are uncommon. PRESENTATION OF CASE: A 49-year-old woman presented with a cervical mass, unexplained weight loss and anxiousness, sweating and insomnia. On physical examination, she had a palpable left thyroid nodule. Thyroid function tests showed suppressed TSH (<0,1 uUI/mL), thyroxine 1,44 ng/dL (normal range 0,70-1,48) and triiodothyronine 4,33 pg/mL (normal range 1,71-3,71)...
January 8, 2018: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/29331205/free-thyroxine-and-tsh-interact-with-secreted-protein-acidic-and-rich-in-cysteine-like-1-in-ischemic-stroke
#9
Wojciech Ambrosius, Justyna Rosinska, Slawomir Michalak, Maria Lukasik, Radoslaw Kazmierski, Wojciech Kozubski
The role of the thyroid gland in ischemic stroke pathology is not well understood. As thyroid hormones modulate the extracellular matrix, we explored the possible link between them and secreted protein acidic and rich in cysteine like 1 (SC1) - one of the extracellular matrix molecules. In the 81 patients with acute ischemic stroke, serum SC1 levels were much higher compared with 30 control subjects: 4.47 vs 2.43ng/mL (p<0.001). Serum levels of free thyroxine (fT4) were higher in stroke subjects compared to those of controls (p=0...
January 6, 2018: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/29327786/differential-effects-of-experimental-hyperthyroidism-on-declined-immunity-of-broiler-chicken
#10
M S Khilji, M A Sandhu, M S Yousaf, A A Saeed, H U Rehman, H Zaneb, M A Rashid
Thyroid hormones (THs) are involved in the development of lymphoid organs and regulation of immune function in birds. However, their role as an immune-modulator in the hyperthyroid state is still debatable. To explore the interrelationship of thyroxine (T4 ) and the immune system, chicks were divided into three groups. Group I was comprised of control birds, who received the basal diet while group II and III were given diets supplemented with 5 μg and 10 μg thyroxine/kg feed, respectively, from 15 to 28 days of age...
January 12, 2018: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/29325045/mean-high-dose-l-thyroxine-treatment-is-efficient-and-safe-to-achieve-a-normal-iq-in-young-adult-patients-with-congenital-hypothyroidism
#11
Paulina Aleksander, Michaela Brückner-Spieler, Anne-Marie Stöhr, Erwin Lankes, Peter Kühnen, Dirk Schnabel, Andrea Ernert, Walter Stäblein, Maria E Craig, Oliver Blankenstein, Annette Grüters, Heiko Krude
Context: The optimal levothyroxine (LT4) dose required to treat congenital hypothyroidism (CH) remains unclear, with a debate if higher starting doses (>10µg/kg) are necessary and safe for normal Intelligence Quotient (IQ). Objective: To examine the psychomotor, metabolic and quality of life outcome in patients with CH treated with a mean high initial LT4 dose. Design, settings, participants: A cross- sectional cohort study of CH patients identified in the Berlin newborn screening programme from 1979-2003...
January 9, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29325028/tsh-and-ft4-concentrations-in-congenital-central-hypothyroidism-and-mild-congenital-thyroidal-hypothyroidism
#12
Nitash Zwaveling-Soonawala, A S Paul van Trotsenburg, Paul H Verkerk
Context: In central hypothyroidism (CeH) free thyroxine (FT4) concentrations are low while TSH concentrations may be low, normal or even slightly elevated due to reduced bioactivity. Congenital CeH (CCeH) may be isolated or part of multiple pituitary hormone deficiency (MPHD). Objective: To test our hypotheses that (1) TSH concentrations have a more U-shaped distribution in children with CCeH compared to children with a normally functioning hypothalamic-pituitary-thyroid-axis, and (2) TSH concentrations in children with CCeH with MPHD are higher compared to children with isolated CCeH...
January 9, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29321381/association-between-genetic-polymorphism-and-levothyroxine-bioavailability-in-hypothyroid-patients
#13
Merve Arici, Ezgi Oztas, Fatih Yanar, Nihat Aksakal, Beyza Ozcinar, Gul Ozhan
Thyroid hormones play a vital role in the human body for growth and differentiation, regulation of energy metabolism, and physiological function. Hypothyroidism is a common endocrine disorder, which generally results from diminished normal circulating concentrations of serum thyroxine (fT4) and triiodothyronine (fT3). The primary choice in hypothyroidism treatment is oral administration of levothyroxine (L-T4), a synthetic T4 hormone, as approximately 100-125 μg/day. Generally, dose adjustment is made by trial and error approach...
January 11, 2018: Endocrine Journal
https://www.readbyqxmd.com/read/29320567/myocardium-of-patients-with-dilated-cardiomyopathy-presents-altered-expression-of-genes-involved-in-thyroid-hormone-biosynthesis
#14
Carolina Gil-Cayuela, Ana Ortega, Estefanía Tarazón, Luis Martínez-Dolz, Juan Cinca, José Ramón González-Juanatey, Francisca Lago, Esther Roselló-Lletí, Miguel Rivera, Manuel Portolés
BACKGROUND: The association between dilated cardiomyopathy (DCM) and low thyroid hormone (TH) levels has been previously described. In these patients abnormal thyroid function is significantly related to impaired left ventricular (LV) function and increased risk of death. Although TH was originally thought to be produced exclusively by the thyroid gland, we recently reported TH biosynthesis in the human ischemic heart. OBJECTIVES: Based on these findings, we evaluated whether the genes required for TH production are also altered in patients with DCM...
2018: PloS One
https://www.readbyqxmd.com/read/29319368/association-of-increased-eomesodermin-bcl6-and-granzyme-b-expression-with-major-clinical-manifestations-of-hashimoto-s-thyroiditis-an-observational-study
#15
Mario Štefanić, Stana Tokić, Mirjana Suver Stević, Ljubica Glavaš-Obrovac
PURPOSE: Studies of cytotoxic T cells and their respective lineage master regulators have been limited in Hashimoto's thyroiditis (HT). It is unclear whether their transcriptomes are changed in HT patients and how these changes are associated with the thyroid damage, major clinical manifestations, and disease progression. METHODS: We explored the gene expression patterns of selected transcription factors [eomesodermin (EOMES), BACH2, BCL6, TCF1] and cytolytic molecules [granzyme B (GZMB)] in peripheral blood (PB) T cells of 10 healthy controls and 30 HT patients of various subtypes (hypothyroid, untreated HT; L-thyroxine (T4)-treated HT, and spontaneously euthyroid HT) using real-time quantitative PCR...
January 10, 2018: Immunological Investigations
https://www.readbyqxmd.com/read/29319127/sexual-function-and-depressive-symptoms-in-young-men-with-hypothyroidism-receiving-levothyroxine-liothyronine-combination-therapy
#16
Robert Krysiak, Bogdan Marek, Bogusław Okopień
INTRODUCTION: Both overt and subclinical hypothyroidism are often accompanied by sexual dysfunction. Despite improving male sexual functioning, levothyroxine treatment does not always restore all its aspects. The aim of this study was to compare male sexual functioning and depressive symptoms between men with hypothyroidism receiving levothyroxine/liothyronine combination therapy and men receiving levothyroxine alone. MATERIAL AND METHODS: The study population consisted of 21 young levothyroxine-treated men with clinical symptoms of hypothyroidism in whom serum thyrotropin and thyroid hormone levels were within the normal limits...
January 10, 2018: Endokrynologia Polska
https://www.readbyqxmd.com/read/29318025/feline-dry-eye-syndrome-of-presumed-neurogenic-origin-a-case-report
#17
Lionel Sebbag, Patricia A Pesavento, Sebastian E Carrasco, Christopher M Reilly, David J Maggs
Case summary: A 14-year-old female spayed Abyssinian cat, which about 1 year previously underwent thoracic limb amputation, radiotherapy and chemotherapy for an incompletely excised vaccine-related fibrosarcoma, was presented for evaluation of corneal opacity in the left eye (OS). The ocular surface of both eyes (OU) had a lackluster appearance and there was a stromal corneal ulcer OS. Results of corneal aesthesiometry, Schirmer tear test-1 (STT-1) and tear film breakup time revealed corneal hypoesthesia, and quantitative and qualitative tear film deficiency OU...
January 2018: JFMS Open Reports
https://www.readbyqxmd.com/read/29316865/effects-of-thyroid-stimulating-hormone-on-peripheral-thyroid-hormone-metabolism-and-serum-lipids
#18
Carolien M Beukhof, Elske Theresia Massolt, Theo J Visser, Tim Korevaar, Marco Medici, Wouter W de Herder, Jeanine Roeters van Lennep, Monique Mulder, Yolanda B de Rijke, Christoph Reiners, Frederik A Verburg, Robin Peeters
BACKGROUND: Subclinical hypothyroidism is associated with dyslipidemia and atherosclerosis. Whether part of these effects are mediated via direct effects of TSH on peripheral TH metabolism and/or concentrations of serum lipids is not clear. OBJECTIVE: To examine whether thyroid stimulating hormone (TSH) has direct effects on peripheral thyroid hormone (TH) metabolism and serum lipids. METHODS: We retrospectively analyzed 82 patients with differentiated thyroid cancer...
January 9, 2018: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/29316515/the-body-burden-and-thyroid-disruption-in-lizards-eremias-argus-living-in-benzoylurea-pesticides-contaminated-soil
#19
Jing Chang, Jitong Li, Weiyu Hao, Huili Wang, Wei Li, Baoyuan Guo, Jianzhong Li, Yinghuan Wang, Peng Xu
Dermal exposure is regarded as a potentially significant but understudied route for pesticides uptake in terrestrial reptiles. In this study, a native Chinese lizard was exposed to control, diflubenzuron or flufenoxuron contaminated soil (1.5 mg kg-1) for 35 days. Tissue distribution, liver lesions, thyroid hormone levels and transcription of most target genes were examined. The half-lives of diflubenzuron and flufenoxuron in the soil were 118.9 and 231.8 days, respectively. The accumulation of flufenoxuron in the liver, brain, kidney, heart, plasma and skin (1...
January 4, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29314156/simultaneous-quantification-of-t4-t3-rt3-3-5-t2-and-3-3-t2-in-larval-zebrafish-danio-rerio-as-a-model-to-study-exposure-to-polychlorinated-biphenyls
#20
Xiaopeng Chen, Kyla M Walter, Galen W Miller, Pamela J Lein, Birgit Puschner
Environmental toxicants that interfere with thyroid hormone (TH) signaling can impact growth and development in animals and humans. Zebrafish represent a model to study chemically-induced TH disruption, prompting the need for sensitive detection of THs. Simultaneous quantification of 3,3',5-triiodo-L-thyronine (T3), thyroxine (T4), 3,3',5'-triiodo-L-thyronine (rT3), 3,5-diiodo-L-thyronine (3,5-T2), and 3,3'-diiodo-L-thyronine (3,3'-T2) in zebrafish larvae was achieved by ultra-performance liquid chromatography-tandem mass spectrometry in positive ion mode...
January 3, 2018: Biomedical Chromatography: BMC
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