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Thyrotropin

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https://www.readbyqxmd.com/read/29340973/reference-intervals-for-thyrotropin-in-an-area-of-northern-italy-the-pordenone-thyroid-study-tripp
#1
R Tozzoli, F D'Aurizio, P Metus, A Steffan, C Mazzon, M Bagnasco
PURPOSE: Thyrotropin (TSH) is the most accurate marker of thyroid dysfunction in the absence of pituitary or hypothalamic disease. Studies on TSH reference intervals (RIs) showed wide inter-individual variability and prompted an intense debate about the best estimation of TSH RIs. DESIGN: We performed a population study on TSH RIs, using current data stored in the laboratory information system (LIS), at the Hospital Department of Laboratory Medicine, Pordenone (Italy), historically an area of mild-moderate iodine deficiency with a relatively high goiter prevalence...
January 16, 2018: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/29338092/delayed-initial-radioiodine-therapy-related-to-incomplete-response-in-low-to-intermediate-risk-differentiated-thyroid-cancer
#2
Hui Li, Ying-Qiang Zhang, Chen Wang, Xin Zhang, Xin Li, Yan-Song Lin
Whether the initiating time of radioiodine (RAI) therapy will affect the clinical outcome in differentiated thyroid cancer (DTC) remains controversial. The objective of this study was to evaluate the impact of RAI therapy initiating time on response to initial therapy in low- to intermediate-risk DTC METHODS: A total of 235 consecutive patients with low- to intermediate-risk DTC were retrospectively reviewed. According to the time interval between thyroidectomy and RAI therapy, patients were divided into Group 1 (interval < 3 months, n=187) and Group 2 (interval ≥ 3 months, n=48)...
January 16, 2018: Clinical Endocrinology
https://www.readbyqxmd.com/read/29337034/establishment-of-trimester-specific-reference-range-for-thyroid-hormones-during-pregnancy
#3
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
#4
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/29331793/moderate-dose-simvastatin-therapy-potentiates-the-effect-of-vitamin-d-on-thyroid-autoimmunity-in-levothyroxine-treated-women-with-hashimoto-s-thyroiditis-and-vitamin-d-insufficiency
#5
Robert Krysiak, Witold Szkróbka, Bogusław Okopień
BACKGROUND: Vitamin D preparations reduce titers of thyroid antibodies in women with autoimmune thyroiditis. The same effect was induced by high-dose, but not moderate-dose-, statin therapy. No previous study has investigated the impact of concomitant treatment with a statin and vitamin D on thyroid autoimmunity. METHODS: The study included three matched groups of women with Hashimoto's thyroiditis and low vitamin D status. Groups B (n = 19) and C (n = 20) were treated with vitamin D (2000 IU daily)...
July 27, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29325833/treatment-of-graves-disease-in-children-the-portuguese-experience
#6
Olinda Marques, Ana Antunes, Maria João Oliveira
INTRODUCTION: Graves' disease (GD) is an autoimmune thyroid disease, common in adults but rare in children. The best therapeutic approach remains controversial. OBJECTIVES: To ascertain the current treatment of pediatric GD in Portugal and to assess the clinical and biochemical factors that determine definitive/long-term remission after treatment with antithyroid drugs (ATDs). PATIENTS AND METHODS: A retrospective analysis of data about pediatric GD treatment collected from a nationwide survey conducted by the Portuguese Society of Pediatric Endocrinology and Diabetology from May to August 2013...
January 8, 2018: Endocrinología, Diabetes y Nutrición
https://www.readbyqxmd.com/read/29325496/maternal-thyrotropin-receptor-antibody-concentration-and-the-risk-of-fetal-and-neonatal-thyrotoxicosis-a-systematic-review
#7
Myrthe Marguerite van Dijk, Iris Smits, Eric Fliers, Peter H Bisschop
BACKGROUND: In pregnant women with Graves' disease, maternal thyrotropin receptor antibodies (TRAb) can cross the placenta and induce fetal or neonatal thyrotoxicosis. Symptoms of fetal thyrotoxicosis are tachycardia, intrauterine growth restriction and intra-uterine death. Recommendations on an upper limit of TRAb concentrations below which intensive fetal monitoring can be safely omitted vary between different guidelines. The objective of this study was to define an evidence-based cut-off level for maternal TRAb necessitating additional fetal monitoring during pregnancy...
January 12, 2018: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/29319127/sexual-function-and-depressive-symptoms-in-young-men-with-hypothyroidism-receiving-levothyroxine-liothyronine-combination-therapy
#8
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/29300135/non-clinical-pharmacokinetic-profiles-of-rovatirelin-an-orally-available-thyrotropin-releasing-hormone-analogue
#9
Kaoru Kobayashi, Yoshikazu Abe, Hiroshi Harada, Emiko Oota, Takuro Endo, Hiroo Takeda
The non-clinical pharmacokinetic profiles of rovatirelin, a novel thyrotropin releasing hormone (TRH) analogue, were investigated in vivo and in vitro. Rovatirelin orally administered to rats and dogs was rapidly absorbed and bioavailability was estimated to be 7.3% and 41.3%, respectively. The extent of plasma protein binding of rovatirelin in rats, dogs, and humans was low in all species (∼15%). The permeability of rovatirelin from blood to brain (permeability-surface area) ranged from 1.04 ± 0.14 to 1...
January 4, 2018: Xenobiotica; the Fate of Foreign Compounds in Biological Systems
https://www.readbyqxmd.com/read/29296189/metformin-affects-thyroid-function-in-male-rats
#10
Xiaowen Hu, Yang Liu, Changmei Wang, Lulu Hou, Xiaoyan Zheng, Yeqiu Xu, Lin Ding, Shuguang Pang
An intriguing area of research in type 2 diabetes recently discovered association of metformin therapy with thyroid functional and morphological changes. We aimed to evaluate the external symptoms and biochemical indicators concerning thyroid function in rats treated with metformin. Male wistar rats were randomly divided into four groups: Group (D-/M-), Group (D-/M+), Group (D+/M-), and Group (D+/M+), according to whether they were induced to diabetic model or placed on metformin. Characteristics of food intake, body weight, and other external symptoms were recorded...
December 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/29290039/evidence-of-g-protein-coupled-receptor-and-substrate-transporter-heteromerization-at-a-single-molecule-level
#11
Jana Fischer, Gunnar Kleinau, Claudia Rutz, Denise Zwanziger, Noushafarin Khajavi, Anne Müller, Maren Rehders, Klaudia Brix, Catherine L Worth, Dagmar Führer, Heiko Krude, Burkhard Wiesner, Ralf Schülein, Heike Biebermann
G-protein-coupled receptors (GPCRs) can constitute complexes with non-GPCR integral membrane proteins, while such interaction has not been demonstrated at a single molecule level so far. We here investigated the potential interaction between the thyrotropin receptor (TSHR) and the monocarboxylate transporter 8 (MCT8), a member of the major facilitator superfamily (MFS), using fluorescence cross-correlation spectroscopy (FCCS). Both the proteins are expressed endogenously on the basolateral plasma membrane of the thyrocytes and are involved in stimulation of thyroid hormone production and release...
December 30, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/29288501/optimal-iodine-supplementation-during-anti-thyroid-drug-therapy-for-graves-disease-is-associated-with-lower-recurrence-rates-than-iodine-restriction
#12
Huibin Huang, Yaxiong Shi, Bo Liang, Huiyao Cai, Qingyan Cai, Ruhai Lin
OBJECTIVE: A relationship between iodine intake and the effectiveness of anti-thyroid drug (ATD) therapy for Graves' disease (GD) has been suggested and strict restriction of iodine intake has been tried in the treatment of GD in some studies. However, it is unclear whether dietary iodine supplementation improves the prognosis of ATD therapy for GD. This study aimed to clarify whether optimal iodine supplementation during anti-thyroid drug therapy for GD is associated with lower recurrence rates than iodine restriction...
December 29, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/29283520/sensitivity-of-t-lymphocytes-to-hormones-of-the-anterior-pituitary-gland
#13
N V Tishevskaya, N M Gevorkyan, N I Kozlova
The review provides information about the features of the sensitivity of thymocytes, lymphoid organs' cells and T-lymphocytes of peripheral blood to the hormones secreted by anterior pituitary gland's cells: growth hormone, thyrotropin, adrenocorticotropic hormone, prolactin and β-endorphin. Some aspects of the T-lymphocytes's response to humoral signals from the hypophysis are shown in the article. Also the pituitary hormones' role in the regulation of proliferation, differentiation, and cytokine production of T-lymphocytes in normal and pathological conditions of the organism being discussed...
January 2017: Uspekhi Fiziologicheskikh Nauk
https://www.readbyqxmd.com/read/29275437/gene-expression-of-thyrotropin-and-corticotrophin-releasing-hormones-is-regulated-by-environmental-salinity-in-the-euryhaline-teleost-sparus-aurata
#14
Ignacio Ruiz-Jarabo, J A Martos-Sitcha, C Barragán-Méndez, G Martínez-Rodríguez, J M Mancera, F J Arjona
In euryhaline teleosts, the hypothalamus-pituitary-thyroid and hypothalamus-pituitary-interrenal axes (HPT and HPI, respectively) are regulated in response to environmental stimuli such as salinity changes. However, the molecular players participating in this physiological process in the gilthead seabream (Sparus aurata), a species of high value for aquaculture, are still not identified and/or fully characterized in terms of gene expression regulation. In this sense, this study identifies and isolates the thyrotropin-releasing hormone (trh) mRNA sequence from S...
December 23, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29273685/igf-i-receptor-and-thyroid-associated-ophthalmopathy
#15
Michelle Mohyi, Terry J Smith
Thyroid-associated ophthalmopathy (TAO) is a vexing and poorly understood autoimmune process involving the upper face and tissues surrounding the eyes. In TAO, the orbit can become inflamed and undergo substantial remodeling that is disfiguring and can lead to loss of vision. These are currently no approved medical therapies for TAO, the consequence of its uncertain pathogenic nature. It usually presents as a component of the syndrome known as Graves' disease where loss of immune tolerance to the thyrotropin receptor (TSHR) results in the generation of activating antibodies against that protein and hyperthyroidism...
December 22, 2017: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29251783/effect-of-metformin-on-hypothalamic-pituitary-thyroid-axis-activity-in-elderly-antipsychotic-treated-women-with-type-2-diabetes-and-subclinical-hypothyroidism-a-preliminary-study
#16
Robert Krysiak, Witold Szkróbka, Bogusław Okopień
Metformin was found to reduce elevated serum thyrotropin levels, and this effect was partially determined by endogenous dopaminergic tone. The aim of this study was to compare the effect of metformin treatment on hypothalamic-pituitary-thyroid axis activity in elderly women with subclinical hypothyroidism treated with antipsychotic agents and not receiving this drug. The study population consisted of 34 elderly women with subclinical hypothyroidism, 16 of whom received antipsychotic drugs. Because of coexistent type 2 diabetes, these women were treated with metformin (2...
December 18, 2017: Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/29242704/effects-of-prolonged-treatment-with-co-trimoxazole-on-the-thyroid-gland-liver-and-epididymal-sperm-reserve-in-dogs
#17
Davinson C Anyogu, Vincent So Shoyinka, John I Ihedioha
Co-trimoxazole is an antimicrobial drug gotten from potentiation of sulfamethoxazole with trimethoprim. It is widely used for the treatment of bacterial and protozoan infections in humans. It is also used in veterinary clinics against susceptible microorganisms, but thyroid dysfunction has raised concern especially in dogs. This study aimed to determine the effects of prolonged treatment with co-trimoxazole in euthyroid dogs. Dogs were given co-trimoxazole at 30, 60, and 120 mg/kg body weight at 12-hour intervals for 21 days...
2017: Clinical Medicine Insights. Pathology
https://www.readbyqxmd.com/read/29240719/pericardial-effusion-as-a-presenting-symptom-of-hashimoto-thyroiditis-a-case-report
#18
Alberto Leonardi, Laura Penta, Marta Cofini, Lucia Lanciotti, Nicola Principi, Susanna Esposito
Background: Hashimoto thyroiditis (HT) is the most frequent cause of acquired hypothyroidism in paediatrics. HT is usually diagnosed in older children and adolescents, mainly in females and is rare in infants and toddlers with cardiac involvement, including pericardial effusion, that can be found in 10% to 30% of adult HT cases. In this paper, a child with HT and pericardial effusion as the most important sign of HT is described. Case presentation: A four-year-old male child suffering for a few months from recurrent abdominal pain sometimes associated with vomiting underwent an abdominal ultrasound scan outside the hospital...
December 14, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29237935/isolated-thyrotropin-elevation-is-associated-with-insufficient-night-sleep-in-night-sleep-restricted-subjects
#19
Yue-Rong Yan, Jia-Qi Li, Ye-Rong Yu
No abstract text is available yet for this article.
December 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/29225840/severe-thyrotoxicosis-in-an-infant-revealing-familial-nonautoimmune-hyperthyroidism-with-a-novel-c672w-stimulating-thyrotropin-receptor-germline-mutation
#20
Isabelle Oliver-Petit, Frédérique Savagner, Solange Grunenwald, Magaly Vialon, Thomas Edouard, Philippe Caron
We describe severe thyrotoxicosis in young members of a family with nonautoimmune hyperthyroidism caused by a C672W germline mutation in exon 10 of TSHR gene. In this family, lack of genotype-phenotype correlation and anticipation across generations could be linked to an increased iodine intake as recently observed in France.
December 2017: Clinical Case Reports
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