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thyrotropin receptor

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https://www.readbyqxmd.com/read/28748990/-clinical-features-of-patients-with-basedow-graves-disease-seen-at-a-university-hospital
#1
Alejandra Lanas, Patricia Díaz, Daniela Eugenin, Franco González, Pía Cid, Francisco Cordero, Verónica Araya, Claudio Liberman, Marcela Barberan, Patricio Gac, Neil Saldías, Pedro Pineda
BACKGROUND: Basedow Graves disease (BGD) is the leading cause of hyperthyroidism. The characteristics of patients seen at a university hospital may differ from those described in the general population. AIM: To describe the clinical features of patients with BGD seen at a university hospital. MATERIAL AND METHODS: Review of medical records of all patients seen at our hospital between 2009 and 2014 with the diagnosis of thyrotoxicosis, hyperthyroidism or BGD...
April 2017: Revista Médica de Chile
https://www.readbyqxmd.com/read/28741655/treatment-of-a-thyrotropin-secreting-pituitary-adenoma-tsh-oma-with-pasireotide-lar-case-report
#2
Marlise E A van Eersel, Susanne H Meeuwisse-Pasterkamp, Anneke C Muller Kobold, Linda C Meiners, Wilfred F den Dunnen, Leo J Hofland, Gerrit van den Berg
Thyrotropin (TSH)-secreting pituitary adenomas (TSH-oma) are rare and account for about 0.5-3% of all pituitary adenomas. Patients with TSH-oma present themselves mostly with central hyperthyroidism expressing increased circulating levels of TSH, free T4 and T3.(1) TSH-omas are usually benign tumours and express somatostatin receptors subtypes 2 and 5. This article is protected by copyright. All rights reserved.
July 25, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28737965/comparison-of-three-competitive-immunoassays-for-measurement-of-tsh-receptor-antibodies-in-patients-with-graves-disease
#3
Sara Doroudian, Inge Bülow Pedersen, Cindy Soendersoe Knudsen, Aase Handberg, Stine Linding Andersen
Thyrotropin (TSH) receptor antibodies (TRAb) mediate the hyperthyroidism of Graves' disease (GD). The aim of the study was to compare the diagnostic performance and assay agreement between three immunoassays for the measurement of TRAb in patients with newly diagnosed GD. TRAb was measured with three different assays [H-TRAb (BRAHMS Diagnostica), M22-Man (RSR Limited) and M22-Aut (Roche Diagnostics)] in 387 participants who were recruited from two Danish population-based studies and diagnosed with GD (n = 101), multinodular toxic goitre (n = 88), primary autoimmune hypothyroidism (n = 100) or included as controls (n = 98)...
July 24, 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/28720519/taltirelin-alleviates-fatigue-like-behavior-in-mouse-models-of-cancer-related-fatigue
#4
John P Dougherty, Brian S Wolff, Mary J Cullen, Leorey N Saligan, Marvin C Gershengorn
Fatigue affects most cancer patients and has numerous potential causes, including cancer itself and cancer treatment. Cancer-related fatigue (CRF) is not relieved by rest, can decrease quality of life, and has no FDA-approved therapy. Thyrotropin-releasing hormone (TRH) has been proposed as a potential novel treatment for CRF, but its efficacy against CRF remains largely untested. Thus, we tested the TRH analog, taltirelin (TAL), in mouse models of CRF. To model fatigue, we used a mouse model of chemotherapy, a mouse model of radiation therapy, and mice bearing colon 26 carcinoma tumors...
July 15, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28693124/pediatric-toxic-polycystic-thyroid
#5
Janeil M Belle, Nektarios Vasilottos, Todd D Nebesio, Benjamin C James
BACKGROUND: Polycystic thyroid disease (PCTD) is a rare condition and has been described in adults in the setting of subclinical and clinical hypothyroidism. We present the first known case of a pediatric patient with diffuse macrocystic degeneration of the thyroid. CLINICAL PRESENTATION: A 6-year-old previously healthy patient was evaluated after presenting with a 16-month history of an enlarging polycystic thyroid and hyperthyroidism. Markers of autoimmune thyroid disease including thyroid stimulating immunoglobulin (TSI), thyroid stimulating hormone (TSH) receptor antibody, thyroid peroxidase antibody and thyroglobulin antibody were negative...
June 16, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28686898/prenatal-transfer-of-decabromodiphenyl-ether-bde-209-results-in-disruption-of-the-thyroid-system-and-developmental-toxicity-in-zebrafish-offspring
#6
Zhihua Han, Yufei Li, Shenghu Zhang, Ninghui Song, Huaizhou Xu, Yao Dang, Chunsheng Liu, John P Giesy, Hongxia Yu
Decabromodiphenyl ether (BDE-209) was one of most widely-used polybrominated diphenyl ether (PBDE) flame retardants and is frequently detected in both abiotic and biotic samples from environment. However, knowledge of its transgenerational risks is limited. Here, 4-month-old zebrafish were exposed to various concentrations of BDE-209 (0, 3, 30 or 300μg/L) for 28days and spawned in clean water without BDE-209. Concentrations of triiodothyronine (T3) and thyroxine (T4) as well as expressions of genes involved in the hypothalamic-pituitary-thyroid (HPT) axis were measured in offspring after exposure of adult zebrafish to BDE-209...
June 23, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28685517/free-thyroxine-anti-thyroid-stimulating-hormone-receptor-antibody-titers-and-absence-of-goiter-were-associated-with-responsiveness-to-methimazole-in-patients-with-new-onset-graves-disease
#7
Hoon Sung Choi, Won Sang Yoo
BACKGROUND: Anti-thyroid drug therapy is considered a treatment of choice for Graves' disease; however, treatment response varies among individuals. Although several studies have reported risk factors for relapse after initial treatment, few have assessed responsiveness during the early treatment period. Our study aimed to identify the clinical characteristics for responsiveness to methimazole. METHODS: We included 99 patients diagnosed with Graves' disease for the first time...
June 2017: Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28672775/pediatric-toxic-polycystic-thyroid
#8
Janeil M Belle, Nektarios Vasilottos, Todd D Nebesio, Benjamin C James
BACKGROUND: Polycystic thyroid disease (PCTD) is a rare condition and has been described in adults in the setting of subclinical and clinical hypothyroidism. We present the first known case of a pediatric patient with diffuse macrocystic degeneration of the thyroid. CLINICAL PRESENTATION: A 6-year-old previously healthy patient was evaluated after presenting with a 16-month history of an enlarging polycystic thyroid and hyperthyroidism. Markers of autoimmune thyroid disease including thyroid stimulating immunoglobulin (TSI), thyroid stimulating hormone (TSH) receptor antibody, thyroid peroxidase antibody and thyroglobulin antibody were negative...
July 26, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28648507/resistance-to-thyrotropin
#9
REVIEW
Helmut Grasberger, Samuel Refetoff
Resistance to thyrotropin (RTSH) is broadly defined as reduced sensitivity of thyroid follicle cells to stimulation by biologically active TSH due to genetic defects. Affected individuals have elevated serum TSH in the absence of goiter, with the severity ranging from nongoitrous isolated hyperthyrotropinemia to severe congenital hypothyroidism with thyroid hypoplasia. Conceptually, defects leading to RTSH impair both aspects of TSH-mediated action, namely thyroid hormone synthesis and gland growth. These include inactivating mutations in the genes encoding the TSH receptor and the PAX8 transcription factor...
March 2017: Best Practice & Research. Clinical Endocrinology & Metabolism
https://www.readbyqxmd.com/read/28641581/thyrotoxic-and-pheochromocytoma-multisystem-crisis-a-case-report
#10
Kodai Suzuki, Takahito Miyake, Hideshi Okada, Fuminori Yamaji, Yuichiro Kitagawa, Tetsuya Fukuta, Ryu Yasuda, Yoshihito Tanaka, Haruka Okamoto, Sho Nachi, Tomoaki Doi, Takahiro Yoshida, Keisuke Kumada, Shozo Yoshida, Hiroaki Ushikoshi, Izumi Toyoda, Shinji Ogura
BACKGROUND: Thyrotoxic crisis and pheochromocytoma multisystem crisis are rare, life-threatening, emergency endocrine diseases with various clinical manifestations. Here we report a case of a patient who simultaneously developed thyrotoxic crisis and pheochromocytoma multisystem crisis and required intensive cardiovascular management. CASE PRESENTATION: A 60-year-old Asian man experienced nausea and vomiting, and subsequently developed dyspnea and cold sweats while farming...
June 23, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28639207/the-cell-biology-of-the-thyroid-disrupting-mechanism-of-dichlorodiphenyltrichloroethane-ddt
#11
REVIEW
M Rossi, A R Taddei, I Fasciani, R Maggio, F Giorgi
OBJECTIVE: Dichlorodiphenyltrichloroethane (DDT) is an organochlorine known for its pesticide properties and for its negative effects on human health. It was banned in most countries for its toxicity to the endocrine system, but due to its persistence at clinically relevant concentrations in both soil and animal tissues, DDT is still linked to several health and social problems. METHODS: We have previously shown that DDT exposure is causally related to the extracellular release of vesicular organelles such as microvesicles and/or exosomes by using immunocytochemistry with gold-tagged antibodies and various fluorescent membrane markers...
June 21, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/28636775/role-of-the-tumour-necrosis-factor-like-weak-inducer-of-apoptosis-tweak-fibroblast-growth-factor-inducible-14-fn14-axis-in-autoimmune-thyroid-disease
#12
Shiqiao Peng, Xiaohui Yu, Xuemin Zhao, Xinyi Wang, Xuren Sun, Cheng Han, Zhongyan Shan, Chenyan Li, Weiping Teng
BACKGROUND: TNF-like weak inducer of apoptosis (TWEAK), its receptor fibroblast growth factor-inducible 14 (Fn14) and its scavenger receptor CD163 (sCD163) have known associations with many autoimmune diseases. However, the role of the TWEAK axis in autoimmune thyroid disease (AITD) remains unclear. Therefore, the aim of this study was to investigate the role of the TWEAK-Fn14 axis in the pathogenesis of AITD. METHODS: Serum levels of soluble TWEAK (sTWEAK) and sCD163 were measured in 38 patients with Graves' disease (GD), 40 patients with Hashimoto's thyroiditis (HT), and 40 healthy controls (HCs)...
June 21, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28621684/expression-of-hypothalamic-neurohormones-and-their-receptors-in-the-human-eye
#13
Sander R Dubovy, Maria P Fernandez, Jose J Echegaray, Norman L Block, Noriyuki Unoki, Roberto Perez, Irving Vidaurre, Richard K Lee, Mehrdad Nadji, Andrew V Schally
Extrapituitary roles for hypothalamic neurohormones have recently become apparent and clinically relevant, based on the use of synthetic peptide analogs for the treatment of multiple conditions including cancers, pulmonary edema and myocardial infarction. In the eye, it has been suggested that some of these hormones and their receptors may be present in the ciliary body, iris, trabecular meshwork and retina, but their physiological role has yet to be elucidated. Our study intends to comprehensively demonstrate the expression of some hypothalamic neuroendocrine hormones and their receptors within different retinal and extraretinal structures of the human eye...
June 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/28557707/novel-mutation-t273r-in-thyroid-hormone-receptor-%C3%AE-gene-provides-further-insight-into-cryptic-negative-regulation-by-thyroid-hormone
#14
F Kaššák, V Hána, V Saudek, M Kostrouchová
Production of thyroid hormone is precisely regulated in a negative feed-back mechanism that depends critically on thyroid hormone receptor β (TRβ). This mechanism decreases production of thyrotropin- releasing hormone (TRH) and thyrotropin (TSH) in the hypothalamus and pituitary gland in response to high levels of circulating thyroid hormones (TH). Despite the wealth of accumulated knowledge, it is still not clear how exactly this negative regulation is executed. The syndrome of resistance to thyroid hormone (RTH), in which the levels of TH are not properly sensed, represents naturally occurring situations in which molecular components of this regulation are displayed and may be uncovered...
2017: Folia Biologica (Praha)
https://www.readbyqxmd.com/read/28556305/hypothalamic-dopamine-is-required-for-salsolinol-induced-prolactin-secretion-in-goats
#15
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/28515030/congenital-central-hypothyroidism-caused-by-a-novel-tsh-beta-subunit-gene-mutation-c-94g-a-in-two-siblings
#16
Bayram Özhan, Özlem Boz Anlaş, Bilge Sarıtepe, Burcu Albuz, Nur Gündüz Semerci
Congenital central hypothyroidism (C-CH) is a very rare disease. Alterations in genes included in pituitary development, mutations of the immunoglobulin superfamily member 1 (IGSF1) and transducin β-like protein 1(TBL1X ) can result in C-CH with multiple pituitary hormone deficiencies. However, mutations of the thyrotropin-releasing hormone receptor or TSH-beta (TSHB) gene are responsible for isolated congenital central hypothyroidism. In this paper, we present 2 patients from the same Turkish family with a novel mutation of TSHB...
May 17, 2017: Journal of Clinical Research in Pediatric Endocrinology
https://www.readbyqxmd.com/read/28484426/structural-functional-features-of-the-thyrotropin-receptor-a-class-a-g-protein-coupled-receptor-at-work
#17
REVIEW
Gunnar Kleinau, Catherine L Worth, Annika Kreuchwig, Heike Biebermann, Patrick Marcinkowski, Patrick Scheerer, Gerd Krause
The thyroid-stimulating hormone receptor (TSHR) is a member of the glycoprotein hormone receptors, a sub-group of class A G-protein-coupled receptors (GPCRs). TSHR and its endogenous ligand thyrotropin (TSH) are of essential importance for growth and function of the thyroid gland and proper function of the TSH/TSHR system is pivotal for production and release of thyroid hormones. This receptor is also important with respect to pathophysiology, such as autoimmune (including ophthalmopathy) or non-autoimmune thyroid dysfunctions and cancer development...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28474257/a-cumulative-effect-involving-malfunction-of-the-pth1r-and-atp4a-genes-explains-a-familial-gastric-neuroendocrine-tumor-with-hypothyroidism-and-arthritis
#18
Oriol Calvete, Maite Herraiz, Jose Reyes, Ana Patiño, Javier Benitez
BACKGROUND: Type I gastric neuroendocrine tumors (gNETs) classically arise because of hypergastrinemia and involve destruction of parietal cells, which are responsible for gastric acid secretion through the ATP4A proton pump and for intrinsic factor production. METHODS: By whole exome sequencing, we studied a family with three members with gNETs plus hypothyroidism and rheumatoid arthritis to uncover their genetic origin. RESULTS: A heterozygous missense mutation in the ATP4A gene was identified...
May 4, 2017: Gastric Cancer
https://www.readbyqxmd.com/read/28471415/impact-of-gravity-on-thyroid-cells
#19
REVIEW
Elisabetta Albi, Marcus Krüger, Ruth Hemmersbach, Andrea Lazzarini, Samuela Cataldi, Michela Codini, Tommaso Beccari, Francesco Saverio Ambesi-Impiombato, Francesco Curcio
Physical and mental health requires a correct functioning of the thyroid gland, which controls cardiovascular, musculoskeletal, nervous, and immune systems, and affects behavior and cognitive functions. Microgravity, as occurs during space missions, induces morphological and functional changes within the thyroid gland. Here, we review relevant experiments exposing cell cultures (normal and cancer thyroid cells) to simulated and real microgravity, as well as wild-type and transgenic mice to hypergravity and spaceflight conditions...
May 4, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28469599/the-role-of-thyrotropin-receptor-activation-in-adipogenesis-and-modulation-of-fat-phenotype
#20
Mohd Shazli Draman, Michael Stechman, David Scott-Coombes, Colin M Dayan, Dafydd Aled Rees, Marian Ludgate, Lei Zhang
Evidence from clinical and experimental data suggests that thyrotropin receptor (TSHR) signaling is involved in energy expenditure through its impact on white adipose tissue (WAT) and brown adipose tissue (BAT). TSHR expression increases during mesenchymal stem cell (MSC) differentiation into fat. We hypothesize that TSHR activation [TSHR*, elevated thyroid-stimulating hormone, thyroid-stimulating antibodies (TSAB), or activating mutation] influences MSC differentiation, which contributes to body composition changes seen in hypothyroidism or Graves' disease (GD)...
2017: Frontiers in Endocrinology
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