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Roshini Fernando, Ekaterina Placzek, Edmund A Reese, Andrew T Placzek, Samantha Schwartz, Aaron Trierweiler, Leslie M Niziol, Stephen Atkins, Thomas S Scanlan, Terry J Smith
CONTEXT: The sources and biological impact of 3,3',5,5' tetraiodothyroacetic acid (TA4) are uncertain. CD34(+) fibrocytes express several proteins involved in the production of thyroid hormones. They infiltrate the orbit in Graves' disease (GD), an autoimmune process known as thyroid-associated ophthalmopathy. It appears that the thyrotropin receptor (TSHR) plays an important role in the pathogenesis of TAO. OBJECTIVE: To quantify levels of TA4 in healthy subjects and those with Graves' disease...
October 21, 2016: Journal of Clinical Endocrinology and Metabolism
Kotaro Horiguchi, Takashi Nakakura, Saishu Yoshida, Takehiro Tsukada, Naoko Kanno, Rumi Hasegawa, Shu Takigami, Shunji Ohsako, Takako Kato, Yukio Kato
Contact-dependent (juxtacrine) signaling is important for local cell-to-cell interaction and has received attention in recent years regarding its role in pituitary function, differentiation, and development. This study investigated one of the juxtacrine-related molecules, thymocyte differentiation antigen 1 (THY1), in the anterior lobe of the rat pituitary gland. Western blot analysis revealed expression of the THY1 protein in the adult rat anterior lobe. We also found that the THY1 ligand, integrin-β2 (ITGB2), is also expressed in the pituitary gland...
October 17, 2016: Biochemical and Biophysical Research Communications
Satsuki Nishigaki, Takashi Hamazaki, Keinosuke Fujita, Shuntaro Morikawa, Toshihiro Tajima, Haruo Shintaku
BACKGROUND: Hemizygous mutations in the<i> immunoglobulin superfamily member 1 (IGSF1) </i>gene have been demonstrated to cause congenital central hypothyroidism in males. We report one family with a novel mutation of the<i> IGSF1 </i>gene located on the long arm of the X chromosome. PATIENT FINDINGS: A two-month-old boy was diagnosed with central hypothyroidism because of prolonged jaundice. A thyrotropin releasing hormone (TRH) stimulation test indicated dysfunction in both the hypothalamus and the pituitary gland and prompted us to analyze the<i> IGSF1 </i>gene...
October 20, 2016: Thyroid: Official Journal of the American Thyroid Association
Xu Bojin, Yang Hui, Wang Zhixiao, Yang Tao, Guo Hongwei, Cheng Pei, He Wei, Sun Min, Chen Huanhuan, Duan Yu
This study investigated whether high-normal thyrotropin (TSH) levels are associated with metabolic syndrome in euthyroid Chinese people≥40 years old. Clinical and metabolic factors were assessed in 2,356 subjects (40-77 years old) with TSH levels in the normal range (0.35-5.00 mU/L). Using 2.50 mU/L as the cut-off point of TSH level within the normal range, we divided subjects into the high-TSH (2.50-5.00 mU/L; n=1,064) and low-TSH (0.35-2.50 mU/L; n=11,292) group. The results showed that the mean levels of body mass index (BMI), total cholesterol (TC), low density lipoprotein cholesterol (LDL-C), and fasting plasma glucose (FPG) were higher in the high-TSH group and TSH levels were significantly positively correlated with BMI, LDL-C, TC, and FPG...
June 17, 2016: Journal of Biomedical Research
M H Listewnik, M J Listewnik, T Miazgowski, K Jaskólska, K Jasiakiewicz, B Birkenfeld
Introduction: Earlier studies suggest increased serum levels of thyroid peroxidase antibodies (TPOAb) in some cases with non-autoimmune hyperthyroidism. The aim of the study was to assess the incidence of hypothyroidism in patients with nodular toxic goitre and toxic adenoma at 12 months after radioactive iodine therapy in the relation to TPOAb levels. Patients & Measurements: The study comprised 100 patients (83 females; 17 males) treated with radioactive iodine therapy. Serum concentrations of thyrotropin, free thyroxin, TPOAb, and anti-TSH receptor antibodies were assessed at baseline and 12 months after radioactive iodine therapy...
October 2016: Experimental and Clinical Endocrinology & Diabetes
Man-Li Guo, Xiao Zheng, Liu-Xue Yang, Ya-Li Qiu, Liang Cheng, Shao-Gang Ma
Resistance to thyroid hormone (RTH) coexisting with ectopic thyroid is rare. Here we report a case of RTH with ectopic thyroid. A ten-year-old girl had been misdiagnosed as congenital hypothyroidism and treated with levothyroxine since she was born. Ten-year follow-up showed that the elevated thyrotropin was never suppressed by levothyroxine and no signs indicating hyperthyroidism or hypothyroidism despite elevated FT3 and FT4 levels. Therefore the girl developed no defects in physical and cognitive development...
October 10, 2016: Archives of Endocrinology and Metabolism
Vojtěch Hainer, Hana Zamrazilová, Irena Aldhoon Hainerová
Associations of both hypothyroidism and subclinical hypothyroidism with metabolic syndrome are well established. Nowadays, more attention has been paid to the role of thyroid hormones and thyrotropin (TSH) within the euthyroid range on the development of cardiometabolic health risks. The paper summarizes current knowledge related to the associations of lower free thyroxine (fT4) level and higher levels of both free triiodothyronine (fT3) and TSH with body adiposity, metabolic syndrome and insulin resistance in euthyroid subjects...
2016: Vnitr̆ní Lékar̆ství
Xiaomei Zhang, Baoting Yao, Chenyan Li, Jinyuan Mao, Weiwei Wang, Xiaochen Xie, Xiaochun Teng, Cheng Han, Weiwei Zhou, Chenyang Li, Bin Xu, Lihua Bi, Tao Meng, Jianling Du, Shaowei Zhang, Zhengnan Gao, Liu Yang, Chenling Fan, Weiping Teng, Zhongyan Shan
BACKGROUND: Self-sequential longitudinal reference interval may be expected to minimize the inter-individual variation of thyroid function. Comparison between self-sequential longitudinal reference interval and cross-sectional reference interval in pregnancy has not been well investigated. The objective of this study is to establish a stringent self-sequential longitudinal reference interval (SLRI) of thyroid function in pregnant women and to compare it with the conventional cross-sectional reference interval (CSRI)...
October 12, 2016: Thyroid: Official Journal of the American Thyroid Association
Natascia Tahani, Gilda Ruga, Simona Granato, Matteo Spaziani, Francesca Panimolle, Antonella Anzuini, Andrea Lenzi, Antonio Francesco Radicioni
Klinefelter syndrome has been associated with thyroid abnormalities, the genesis of which is not yet fully clear. The aim of this study was to evaluate thyroid function in Klinefelter syndrome subjects during the pubertal period. Chemiluminescent microparticle immunoassay was used to analyze Thyroid-Stimulating Hormone, fT3 and fT4 concentration in serum samples from 40 Klinefelter syndrome pubertal boys with classic 47,XXY karyotype and 157 healthy age-matched controls. 13 Klinefelter syndrome patients also underwent Thyrotropin-Releasing Hormone testing to evaluate hypothalamic-pituitary function...
October 11, 2016: Endocrine
Qian-Qian Sui, Jiao Zhu, Xiangnan Li, Gillian E Knight, Cheng He, Geoffrey Burnstock, Hongbin Yuan, Zhenghua Xiang
A new multiple fluorescence in situ hybridization method based on hybridization chain reaction was recently reported, enabling simultaneous mapping of multiple target mRNAs within intact zebrafish and mouse embryos. With this approach, DNA probes complementary to target mRNAs trigger chain reactions in which metastable fluorophore-labeled DNA hairpins self-assemble into fluorescent amplification polymers. The formation of the specific polymers enhances greatly the sensitivity of multiple fluorescence in situ hybridization...
October 8, 2016: Journal of Molecular Histology
Gordon Parker, Stacey McCraw
BACKGROUND: The CORE measure was designed to assess a central feature of melancholia - signs of psychomotor disturbance (PMD) - and so provide an alternate non-symptom based measure of melancholia or of its probability. This review evaluates development and application studies undertaken over the last 25 years to consider how well it has met its original objectives. METHODS: All studies published using the CORE measure as either the only or an adjunctive measure of melancholia were obtained and are considered in this review...
September 25, 2016: Journal of Affective Disorders
M S Golovin, M S Golovin, R I Aizman
We studied the effect of audiovisual stimulation training course on physical development, functional state of the cardiovascular system, blood biochemical parameters, and hormonal status of athletes. The training course led to improvement of physical performance and adaptive capacities of the circulatory system, increase in plasma levels of total protein, albumin, and glucose and total antioxidant activity, and decrease in triglyceride, lipase, total bilirubin, calcium, and phosphorus. The concentration of hormones (cortisol, thyrotropin, triiodothyronine, and thyroxine) also decreased under these conditions...
September 2016: Bulletin of Experimental Biology and Medicine
Adam Gesing, Denise Wiesenborn, Andrew Do, Vinal Menon, Augusto Schneider, Berta Victoria, Michael B Stout, John J Kopchick, Andrzej Bartke, Michal M Masternak
Disruption of the growth hormone (GH) signaling pathway promotes insulin sensitivity and is associated with both delayed aging and extended longevity. Two kinds of long-lived mice-Ames dwarfs (df/df) and GH receptor gene-disrupted knockouts (GHRKO) are characterized by a suppressed GH axis with a significant reduction of body size and decreased plasma insulin-like growth factor-1 (IGF-1) and insulin levels. Ames dwarf mice are deficient in GH, prolactin, and thyrotropin, whereas GHRKOs are GH resistant and are dwarf with decreased circulating IGF-1 and increased GH...
September 29, 2016: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
Kristian Hillert Winther, Johanna Eva Märta Wichman, Steen Joop Bonnema, Laszlo Hegedüs
By a systematic review and meta-analysis to investigate clinically relevant effects of selenium supplementation in patients with chronic autoimmune thyroiditis. Controlled trials in adults (≥18 years) with autoimmune thyroiditis, comparing selenium with or without levothyroxine substitution, versus placebo and/or levothyroxine substitution, were eligible for inclusion. Identified outcomes were serum thyrotropin (thyroid stimulating hormone) levels in LT4-untreated patients, thyroid ultrasound and health-related quality of life...
September 28, 2016: Endocrine
Haruhiko Kanasaki, Aki Oride, Tomomi Hara, Tselmeg Mijiddorj, Unurjargal Sukhbaatar, Satoru Kyo
Gonadotropin-releasing hormone (GnRH) and gonadotropins are indispensable hormones for maintaining female reproductive functions. In a similar manner to other endocrine hormones, GnRH and gonadotropins are controlled by their principle regulators. Although it has been previously established that GnRH regulates the synthesis and secretion of luteinizing hormone (LH) and follicle-stimulating hormone (FSH)-both gonadotropins-from pituitary gonadotrophs, it has recently become clear that hypothalamic GnRH is under the control of hypothalamic kisspeptin...
2016: International Journal of Molecular Sciences
Takayuki Hatori, Yohei Sugiyama, Shinichiro Yamashita, Yuka Hirakubo, Kazuhito Nonaka, Ko Ichihashi
In a patient with cardiofaciocutaneous syndrome complicated by intractable infantile spasms (West syndrome), cardiac hypertrophy developed during adrenocorticotropic hormone treatment. Various types of antiepileptic drugs, intravenous immunoglobulin, thyrotropin releasing hormone, and a ketogenic diet were ineffective in this case. However, vigabatrin both decreased clinical seizures and improved electroencephalogram findings. Although vigabatrin has not been approved for use in Japan, the results in the present case suggest that this drug should be considered as an alternative therapy for cases of infantile spasms associated with syndromes involving cardiomyopathy or its potential risk factors, such as cardiofaciocutaneous syndrome...
2016: Journal of Nippon Medical School, Nippon Ika Daigaku Zasshi
Maria Salinas, Maite López-Garrigós, Emilio Flores, Maria Leiva-Salinas, Alberto Asencio, Javier Lugo, Carlos Leiva-Salinas
OBJECTIVES: The main objectives of this study were to show a simple approach to detect inappropriate requests of laboratory tests and to monitor success after establishing interventions. These objectives were monitored through process and outcome indicators customized according to the type and phase of the appropriateness strategy. STUDY DESIGN: Quasi-experimental design. METHODS: Based on evidence regarding laboratory test utilization differences among different geographical areas of Spain, we identified serum calcium (s-Ca) testing to be underrequested and total bilirubin (tBil) testing to be overrequested in primary care patients who undergo testing at the Public University Hospital of San Juan, in San Juan de Alicante, Alicante, Spain...
September 1, 2016: American Journal of Managed Care
Samer R Khan, Layal Chaker, Rikje Ruiter, Joachim G J V Aerts, Albert Hofman, Abbas Dehghan, Oscar H Franco, Bruno H C Stricker, Robin P Peeters
CONTEXT: In vitro and in vivo experiments have assigned both oncosuppressive and oncogenic properties to thyroid hormones. Population-based studies found inconclusive results. OBJECTIVE: We aimed to prospectively assess the relation between thyroid function and incident cancer in a population based setting. DESIGN, SETTING AND PARTICIPANTS: The current study is a prospective population-based cohort study including 10,318 participants for whom baseline measurements of free thyroxine (FT4) and/or thyrotropin (TSH) were available...
September 20, 2016: Journal of Clinical Endocrinology and Metabolism
Lisette Leeuwen, Arno F J van Heijst, Sanne Vijfhuize, Leonardus W J E Beurskens, Gert Weijman, Dick Tibboel, Erica L T van den Akker, Hanneke IJsselstijn
BACKGROUND: Thyroid hormone concentrations may deviate from normal values during critical illness. This condition is known as nonthyroidal illness syndrome (NTIS), and it can influence the results of screening for congenital hypothyroidism (CH) during neonatal extracorporeal membrane oxygenation (ECMO). OBJECTIVES: To determine the incidence of aberrant CH screening results in ECMO-treated neonates, to identify possible determinants, and to follow up patients with abnormal thyroid hormone concentrations...
September 17, 2016: Neonatology
Sarah J Morgan, Susanne Neumann, Bernice Marcus-Samuels, Marvin C Gershengorn
BACKGROUND: Major regulation of thyroid gland function is mediated by thyrotropin (TSH) activating the TSH receptor (TSHR) and inducing upregulation of genes involved in thyroid hormone synthesis. Evidence suggests that the insulin-like growth factor 1 (IGF-1) receptor (IGF-1R) may play a role in regulating TSHR functional effects. This study examined the potential role of TSHR/IGF-1R crosstalk in primary cultures of human thyrocytes. RESULTS: TSH/IGF-1 co-treatment elicited additive effects on thyroglobulin (TG), thyroperoxidase (TPO), and deiodinase type 2 (DIO2) mRNA levels but synergistic effects on sodium-iodide symporter (NIS) mRNA...
October 18, 2016: Thyroid: Official Journal of the American Thyroid Association
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