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https://www.readbyqxmd.com/read/28088465/neuronal-effects-of-thyroid-hormone-metabolites
#1
Eva K Wirth, Franziska Meyer
Thyroid hormones and their metabolites are active regulators of gene expression, mitochondrial function and various other physiological actions in different organs and tissues. These actions are mediated by a spatio-temporal regulation of thyroid hormones and metabolites within a target cell. This spatio-temporal resolution as well as classical and non-classical actions of thyroid hormones and metabolites is accomplished and regulated on multiple levels as uptake, local activation and signaling of thyroid hormones...
January 11, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28078322/diagnostic-dilemma-in-discordant-thyroid-function-tests-due-to-thyroid-hormone-autoantibodies
#2
Panudda Srichomkwun, Neal H Scherberg, Jasminka Jakšić, Samuel Refetoff
OBJECTIVE: Assay interference could be the cause of abnormal thyroid function tests. Early recognition prevents inappropriate patient management. The objective of this report is to present a case with discordant thyroid function tests in different thyroid assay platforms due to thyroid autoantibodies. METHODS: We present a case her family, laboratory data and methods that investigate immunoassay interference. RESULTS: A 21-year-old woman with autoimmune thyroid disease was treated for hypothyroidism with levothyroxine and noted to have elevated total and free thyroxine, free triiodothyronine but normal thyroid-stimulating hormone...
2017: AACE Clin Case Rep
https://www.readbyqxmd.com/read/28076316/changes-of-thyroid-hormonal-status-in-patients-receiving-ketogenic-diet-due-to-intractable-epilepsy
#3
Engin Kose, Orkide Guzel, Korcan Demir, Nur Arslan
BACKGROUND: Ketogenic diet (KD), which is high in fat and low in carbohydrates, mimics the metabolic state of starvation and is used therapeutically for pharmacoresistant epilepsy. It is known that generation of triiodothyronine (T3) from thyroxine (T4) decreases during fasting periods. The aim of this study was to evaluate the thyroid function of children receiving KD for at least 1 year due to drug-resistant epilepsy. METHODS: A total of 120 patients [63 males, 52...
January 11, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28075349/transthyretin-a-transporter-protein-essential-for-proliferation-of-myoblast-in-the-myogenic-program
#4
Eun Ju Lee, Smritee Pokharel, Arif Tasleem Jan, Soyeon Huh, Richelle Galope, Jeong Ho Lim, Dong-Mok Lee, Sung Wook Choi, Sang-Soep Nahm, Yong-Woon Kim, So-Young Park, Inho Choi
Irregularities in the cellular uptake of thyroid hormones significantly affect muscle development and regeneration. Herein, we report indispensable role of transthyretin (TTR) in maintaining cellular thyroxine level. TTR was found to enhance recruitment of muscle satellite cells to the site of injury, thereby regulating muscle regeneration. Fluorescence-activated cell sorting (FACS) and immunofluorescence analysis of TTRwt (TTR wild type) and TTRkd (TTR knock-down) cells revealed that TTR controlled cell cycle progression by affecting the expression of Cyclin A2...
January 8, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28073241/prognostic-value-of-total-triiodothyronine-and-free-thyroxine-levels-for-the-heart-failure-in-patients-with-acute-myocardial-infarction
#5
Min Gyu Kang, Jong Ryeal Hahm, Kye-Hwan Kim, Hyun-Woong Park, Jin-Sin Koh, Seok-Jae Hwang, Jin-Yong Hwang, Jong Hwa Ahn, Yongwhi Park, Young-Hoon Jeong, Jeong Rang Park, Choong Hwan Kwak
Background/Aims: Although a low triiodothyronine (T3) state is closely associated with heart failure (HF), it is uncertain whether total T3 levels on admission is correlated with the clinical outcomes of acute myocardial infarction (AMI). The aim of this study is to investigate the prognostic value of total T3 levels for major adverse cardiovascular and cerebrovascular events (MACCEs) in patients with AMI undergone percutaneous coronary intervention (PCI). Methods: A total of 765 PCI-treated AMI patients (65...
January 11, 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/28073128/the-effect-of-vitamin-d-on-thyroid-autoimmunity-in-levothyroxine-treated-women-with-hashimoto-s-thyroiditis-and-normal-vitamin-d-status
#6
Robert Krysiak, Witold Szkróbka, Bogusław Okopień
Background: Low vitamin D status is associated with autoimmune thyroid disease. Oral vitamin D supplementation was found to reduce titers of thyroid antibodies in levothyroxine-treated women with postpartum thyroiditis and low vitamin D status. Methods: The study included 34 women with Hashimoto's thyroiditis and normal vitamin D status (serum 25-hydroxyvitamin D levels above 30 ng/mL) who had been treated for at least 6 months with levothyroxine. On the basis of patient preference, women were divided into 2 groups, receiving (n=18) or not receiving (n=16) oral vitamin D preparations (2000 IU daily)...
January 10, 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/28073034/unraveling-the-different-toxic-effect-of-flufenoxuron-on-the-thyroid-endocrine-system-of-the-mongolia-racerunner-eremias-argus-at-different-stages
#7
Jing Chang, Wei Li, Baoyuan Guo, Peng Xu, Yinghuan Wang, Jianzhong Li, Huili Wang
Flufenoxuron is a widely used pesticide to inhibit the synthesis of chitin during insect development and its effect on the growth of lizards has been little addressed. The hypothalamus-pituitary-thyroid (HPT) axis plays an important role on the development of lizards. In this study, the lizards at different development stages (proliferation and resting stages) were exposed to flufenoxuron for 21 days. The plasma thyroid hormone levels, thyroid gland histopathology and expression profiles of thyroid hormone receptors (trα, trβ), deiodinases (dio1, dio2), and transthyretin (ttr) genes were measured to evaluated the toxic effect of flufenoxuron on the HPT axis at different stages...
January 4, 2017: Chemosphere
https://www.readbyqxmd.com/read/28069537/cardiac-actions-of-thyroid-hormone-metabolites
#8
Grazia Rutigliano, Riccardo Zucchi
Thyroid hormones (THs) have a major role in regulating cardiac function. Their classical mechanism of action is genomic. Recent findings have broadened our knowledge about the (patho)physiology of cardiac regulation by THs, to include non-genomic actions of THs and their metabolites (THM). This review provides an overview of classical and non-classical cardiac effects controlled by: i) iodothyronines (thyroxine, T4; 3,5,3'-triiodothyronine,T3; 3, 5-diiodothyronine, T2); ii) thyronamines (thyronamine, T0AM; 3-iodothyronamine, T1AM); and iii) iodothyroacetic acids (3, 5, 3', 5'-tetraiodothyroacetic acid, tetrac; 3, 5, 3'-triiodothyroacetic acid, triac; 3-iodothyroacetic acid, TA1)...
January 6, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28065941/di2-ethylhexyl-phthalate-disrupts-thyroid-hormone-homeostasis-through-activating-the-ras-akt-trhr-pathway-and-inducing-hepatic-enzymes
#9
Hanfeng Ye, Mei Ha, Min Yang, Ping Yue, Zhengyuan Xie, Changjiang Liu
Di(2-ethylhexyl) phthalate (DEHP), as a widespread environmental pollutant and an endocrine disruptor, can disturb the homeostasis of thyroid hormones (THs). In order to elucidate roles of the MAPK and PI3K/Akt pathways and hepatic enzymes in thyroid-disrupting effects of DEHP, Sprague-Dawley rats were dosed with DEHP by gavage for 30 consecutive days; Nthy-ori 3-1 cells were treated with DEHP with NAC, k-Ras siRNA or inhibitors (U0126 and wortmannin). Results showed that DEHP led to histopathologic changes in rat thyroid and liver, such as the decrease in thyroid follicular cavity diameter, hepatocyte edema...
January 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28060907/sex-differences-in-brain-thyroid-hormone-levels-during-early-post-hatching-development-in-zebra-finch-taeniopygia-guttata
#10
Shinji Yamaguchi, Shin Hayase, Naoya Aoki, Akihiko Takehara, Jun Ishigohoka, Toshiya Matsushima, Kazuhiro Wada, Koichi J Homma
Thyroid hormones are closely linked to the hatching process in precocial birds. Previously, we showed that thyroid hormones in brain had a strong impact on filial imprinting, an early learning behavior in newly hatched chicks; brain 3,5,3'-triiodothyronine (T3) peaks around hatching and imprinting training induces additional T3 release, thus, extending the sensitive period for imprinting and enabling subsequent other learning. On the other hand, blood thyroid hormone levels have been reported to increase gradually after hatching in altricial species, but it remains unknown how the brain thyroid hormone levels change during post-hatching development of altricial birds...
2017: PloS One
https://www.readbyqxmd.com/read/28057507/association-between-thyroid-hormone-parameters-and-dyslipidemia-among-type-2-diabetes-mellitus-patients-comparative-cross-sectional-study
#11
Amare Desalegn Wolide, Belay Zawdie, Tilahun Alemayehu, Samuel Tadesse
BACKGROUND: The relationship between thyroid function and lipid profile has been documented in T2DM and healthy subjects. The aim of the current study was to assess the association between thyroid hormone parameters and dyslipidemia in T2DM and non-diabetic study participants. METHOD AND MATERIALS: In this comparative cross-sectional study, 214 type 2 diabetic and 214 non-diabetic study participants were enrolled. Clinical and anthropometric data were collected from all study participants...
December 26, 2016: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/28057505/prevalence-of-thyroid-dysfunction-among-type-2-diabetes-mellitus-patients
#12
M V Jali, Sanjay Kambar, Sujata M Jali, Nandita Pawar, Prachi Nalawade
AIMS: To determine the prevalence of Thyroid dysfunction among Type 2 Diabetes mellitus. METHODOLOGY: A cross-sectional hospital-based study is conducted to find out the prevalence of thyroid dysfunction. 713 type 2 diabetes mellitus (T2DM) subjects were enrolled in the survey. These subjects were investigated for fasting blood sugar (FBS), glycosylated haemoglobin (HbA1c), total triiodothyronine (T3), total thyroxine (T4), and thyroid-stimulating hormone (TSH)...
December 19, 2016: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/28056660/biochemical-markers-reflecting-thyroid-function-in-athyreotic-patients-on-levothyroxine-monotherapy
#13
Mitsuru Ito, Akira Miyauchi, Mako Fujiwara, Waka Yoshioka, Akane Ide, Takumi Kudo, Eijun Nishihara, Minoru Kihara, Yasuhiro Ito, Kaoru Kobayashi, Akihiro Miya, Shuji Fukata, Mitsushige Nishikawa, Hirotoshi Nakamura, Nobuyuki Amino
BACKGROUND: Some investigators reported that among athyreotic patients on levothyroxine (LT4) monotherapy following total thyroidectomy, the patients with normal serum thyroid-stimulating hormone (TSH) levels had mildly low serum free triiodothyronine (FT3) levels, whereas the patients with mildly suppressed serum TSH levels had normal serum FT3 levels and the patients with strongly suppressed serum TSH had elevated serum FT3 levels. The objective of the present study was to clarify which of these three patient groups is closer to their preoperative euthyroid condition...
January 5, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28055959/preoperative-low-tri-iodothyronine-concentration-is-associated-with-worse-health-status-and-shorter-five-year-survival-of-primary-brain-tumor-patients
#14
Adomas Bunevicius, Vytenis Pranas Deltuva, Sarunas Tamasauskas, Timothy Smith, Edward R Laws, Robertas Bunevicius, Giorgio Iervasi, Arimantas Tamasauskas
BACKGROUND: Low tri-iodothyronine syndrome is associated with worse prognosis of severely ill patients. We investigated the association of thyroid hormone levels with discharge outcomes and 5-year mortality in primary brain tumor patients. METHODS: From January, 2010 until September, 2011, 230 patients (70% women) before brain tumor surgery were evaluated for cognitive (Mini mental State Examination; MMSE) and functional (Barthel index; BI) status, and thyroid function profile...
December 30, 2016: Oncotarget
https://www.readbyqxmd.com/read/28054519/radioiodine-as-an-adjuvant-therapy-and-its-role-in-follow-up-of-differentiated-thyroid-cancer
#15
REVIEW
S Padma, P Shanmuga Sundaram
Papillary and follicular cancers of thyroid are the most common varieties of differentiated thyroid cancers exhibiting excellent long-term prognosis when carefully managed. Being a slow-growing malignancy, guidelines exist on the staging, preoperative risk stratification, and management of these cancers to increase the overall survival of these patients. Radioactive iodine has a central role in differentiated thyroid malignancies. It has the same physical properties as stable iodine, thus both normal and malignant thyrocytes cannot differentiate radioactive from stable iodine...
July 2016: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/28052998/dissecting-thyroid-hormone-transport-and-metabolism-in-dendritic-cells
#16
Nicolás Gigena, Vanina A Alamino, María Del Mar Montesinos, Magalí Nazar, Ruy A Louzada, Simone M Wajner, Ana L Maia, Ana M Masini-Repiso, Denise P Carvalho, Graciela A Cremaschi, Claudia G Pellizas
We reported thyroid hormone (TH) receptor expression in murine dendritic cells (DCs) and 3,5,3'-triiodothyronine (T3)-dependent stimulation of DC maturation and ability to develop a Th1-type adaptive response. Moreover, an increased DC capacity to promote antigen-specific cytotoxic T-cell activity, exploited in a DC-based antitumor vaccination protocol, was revealed. However, putative effects of the main circulating TH, l-thyroxine (T4) and the mechanisms of TH transport and metabolism at DC level, crucial events for TH action at target cell level, were not known...
February 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28051941/thyroid-hormones-reduce-incubation-period-without-developmental-or-metabolic-costs-in-murray-river-short-necked-turtles-emydura-macquarii
#17
Jessica K McGlashan, Michael B Thompson, James U Van Dyke, Ricky-John Spencer
Metabolic processes are affected by both temperature and thyroid hormones in ectothermic vertebrates. Temperature is the major determinant of incubation length in oviparous vertebrates, but turtles can also alter developmental rate independent of temperature. Temperature gradients within natural nests cause different developmental rates of turtle embryos within nests. Despite temperature-induced reductions in developmental rate, cooler-incubated neonates often hatch synchronously with warmer siblings via metabolic compensation...
January 2017: Physiological and Biochemical Zoology: PBZ
https://www.readbyqxmd.com/read/28051891/the-relationship-between-thyroid-function-and-metabolic-changes-in-chinese-women-with-polycystic-ovary-syndrome
#18
Dongmei Yin, Xiangyan Ruan, Xuanxuan Tian, Juan Du, Yue Zhao, Yamei Cui, Yanglu Li, Alfred O Mueck
OBJECTIVES: Aim was to evaluate endocrine, metabolic and thyroid parameters which could help to explore the relationship between thyroid function and metabolic changes in Chinese polycystic ovary syndrome (PCOS) patients. METHODS: Within a prospective study in PCOS patients compared with healthy women, thyroid parameters were assessed, as well as changes of endocrine, metabolic and clinical characteristics. RESULTS: 144 PCOS patients and 48 normo-ovulatory women matched by age as controls were included...
January 4, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/28050799/thyroid-hormone-controls-breast-cancer-cell-movement-via-integrin-%C3%AE-v-%C3%AE-3-src-fak-pi3-kinases
#19
Marina Inés Flamini, Ivonne Denise Uzair, Gisela Erika Pennacchio, Flavia Judith Neira, Joselina Magali Mondaca, Fernando Dario Cuello-Carrión, Graciela Alma Jahn, Tommaso Simoncini, Angel Matías Sanchez
Thyroid hormones (TH) play a fundamental role in diverse processes, including cellular movement. Cell migration requires the integration of events that induce changes in cell structure towards the direction of migration. These actions are driven by actin remodeling and stabilized by the development of adhesion sites to extracellular matrix via transmembrane receptors linked to the actin cytoskeleton. Focal adhesion kinase (FAK) is a non-receptor tyrosine kinase that promotes cell migration and invasion through the control of focal adhesion turnover...
January 3, 2017: Hormones & Cancer
https://www.readbyqxmd.com/read/28043815/associations-among-insulin-resistance-triacylglycerol-high-density-lipoprotein-tag-hdl-ratio-and-thyroid-hormone-levels-a-study-on-type-2-diabetes-mellitus-in-obese-and-overweight-subjects
#20
Rajendran Jayanthi, Abu Raghavan Srinivasan, Mohammed Hanifah, Anandraj Lokesh Maran
AIM: Triacylglycerol/High density lipoprotein (TAG/HDL) ratio, a surrogate marker of LDL particle size (small dense) was included in our study to observe the link with insulin resistance and thyroid co-morbidity. METHODS: Ninety three patients with T2DM of both genders were enrolled from a tertiary health care unit in Puducherry, during the latter half of 2015. The cardio-metabolic risk factors were assessed through body mass index (BMI), blood pressure, fasting blood glucose and lipid profile, glycated haemoglobin and homeostasis model assessment of insulin resistance (HOMA-IR)...
December 23, 2016: Diabetes & Metabolic Syndrome
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